diff options
Diffstat (limited to 'src/grp-login/systemd-logind')
41 files changed, 13968 insertions, 0 deletions
diff --git a/src/grp-login/systemd-logind/70-power-switch.rules b/src/grp-login/systemd-logind/70-power-switch.rules new file mode 100644 index 0000000000..e2855b50f7 --- /dev/null +++ b/src/grp-login/systemd-logind/70-power-switch.rules @@ -0,0 +1,18 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +ACTION=="remove", GOTO="power_switch_end" + +SUBSYSTEM=="input", KERNEL=="event*", SUBSYSTEMS=="acpi", TAG+="power-switch" +SUBSYSTEM=="input", KERNEL=="event*", KERNELS=="thinkpad_acpi", TAG+="power-switch" +SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="twl4030_pwrbutton", TAG+="power-switch" +SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="tps65217_pwr_but", TAG+="power-switch" +SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="* WMI hotkeys", TAG+="power-switch" +SUBSYSTEM=="input", KERNEL=="event*", \ + SUBSYSTEMS=="platform", DRIVERS=="gpio-keys", ATTRS{keys}=="*,116|116,*|116|*,116,*", TAG+="power-switch" + +LABEL="power_switch_end" diff --git a/src/grp-login/systemd-logind/70-uaccess.rules b/src/grp-login/systemd-logind/70-uaccess.rules new file mode 100644 index 0000000000..50dcd2e275 --- /dev/null +++ b/src/grp-login/systemd-logind/70-uaccess.rules @@ -0,0 +1,81 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +ACTION=="remove", GOTO="uaccess_end" +ENV{MAJOR}=="", GOTO="uaccess_end" + +# PTP/MTP protocol devices, cameras, portable media players +SUBSYSTEM=="usb", ENV{ID_USB_INTERFACES}=="*:060101:*", TAG+="uaccess" + +# Digicams with proprietary protocol +ENV{ID_GPHOTO2}=="?*", TAG+="uaccess" + +# SCSI and USB scanners +ENV{libsane_matched}=="yes", TAG+="uaccess" + +# HPLIP devices (necessary for ink level check and HP tool maintenance) +ENV{ID_HPLIP}=="1", TAG+="uaccess" + +# optical drives +SUBSYSTEM=="block", ENV{ID_CDROM}=="1", TAG+="uaccess" +SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="4|5", TAG+="uaccess" + +# Sound devices +SUBSYSTEM=="sound", TAG+="uaccess" \ + OPTIONS+="static_node=snd/timer", OPTIONS+="static_node=snd/seq" + +# ffado is an userspace driver for firewire sound cards +SUBSYSTEM=="firewire", ENV{ID_FFADO}=="1", TAG+="uaccess" + +# Webcams, frame grabber, TV cards +SUBSYSTEM=="video4linux", TAG+="uaccess" +SUBSYSTEM=="dvb", TAG+="uaccess" + +# IIDC devices: industrial cameras and some webcams +SUBSYSTEM=="firewire", ATTR{units}=="*0x00a02d:0x00010*", TAG+="uaccess" +SUBSYSTEM=="firewire", ATTR{units}=="*0x00b09d:0x00010*", TAG+="uaccess" +# AV/C devices: camcorders, set-top boxes, TV sets, audio devices, and more +SUBSYSTEM=="firewire", ATTR{units}=="*0x00a02d:0x010001*", TAG+="uaccess" +SUBSYSTEM=="firewire", ATTR{units}=="*0x00a02d:0x014001*", TAG+="uaccess" + +# DRI video devices +SUBSYSTEM=="drm", KERNEL=="card*|renderD*", TAG+="uaccess" + +# KVM +SUBSYSTEM=="misc", KERNEL=="kvm", TAG+="uaccess" + +# smart-card readers +ENV{ID_SMARTCARD_READER}=="?*", TAG+="uaccess" + +# (USB) authentication devices +ENV{ID_SECURITY_TOKEN}=="?*", TAG+="uaccess" + +# PDA devices +ENV{ID_PDA}=="?*", TAG+="uaccess" + +# Programmable remote control +ENV{ID_REMOTE_CONTROL}=="1", TAG+="uaccess" + +# joysticks +SUBSYSTEM=="input", ENV{ID_INPUT_JOYSTICK}=="?*", TAG+="uaccess" + +# color measurement devices +ENV{COLOR_MEASUREMENT_DEVICE}=="?*", TAG+="uaccess" + +# DDC/CI device, usually high-end monitors such as the DreamColor +ENV{DDC_DEVICE}=="?*", TAG+="uaccess" + +# media player raw devices (for user-mode drivers, Android SDK, etc.) +SUBSYSTEM=="usb", ENV{ID_MEDIA_PLAYER}=="?*", TAG+="uaccess" + +# software-defined radio communication devices +ENV{ID_SOFTWARE_RADIO}=="?*", TAG+="uaccess" + +# 3D printers, CNC machines, laser cutters, 3D scanners, etc. +ENV{ID_MAKER_TOOL}=="?*", TAG+="uaccess" + +LABEL="uaccess_end" diff --git a/src/grp-login/systemd-logind/71-seat.rules.in b/src/grp-login/systemd-logind/71-seat.rules.in new file mode 100644 index 0000000000..de55c9a4ec --- /dev/null +++ b/src/grp-login/systemd-logind/71-seat.rules.in @@ -0,0 +1,54 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +ACTION=="remove", GOTO="seat_end" + +TAG=="uaccess", SUBSYSTEM!="sound", TAG+="seat" +SUBSYSTEM=="sound", KERNEL=="card*", TAG+="seat" +SUBSYSTEM=="input", KERNEL=="input*", TAG+="seat" +SUBSYSTEM=="graphics", KERNEL=="fb[0-9]*", TAG+="seat", TAG+="master-of-seat" +SUBSYSTEM=="drm", KERNEL=="card[0-9]*", TAG+="seat", TAG+="master-of-seat" +SUBSYSTEM=="usb", ATTR{bDeviceClass}=="09", TAG+="seat" + +# 'Plugable' USB hub, sound, network, graphics adapter +SUBSYSTEM=="usb", ATTR{idVendor}=="2230", ATTR{idProduct}=="000[13]", ENV{ID_AUTOSEAT}="1" + +# qemu (version 2.4+) has a PCI-PCI bridge (-device pci-bridge-seat) to group +# devices belonging to one seat. See: +# http://git.qemu.org/?p=qemu.git;a=blob;f=docs/multiseat.txt +SUBSYSTEM=="pci", ATTR{vendor}=="0x1b36", ATTR{device}=="0x000a", TAG+="seat", ENV{ID_AUTOSEAT}="1" + +# Mimo 720, with integrated USB hub, displaylink graphics, and e2i +# touchscreen. This device carries no proper VID/PID in the USB hub, +# but it does carry good ID data in the graphics component, hence we +# check it from the parent. There's a bit of a race here however, +# given that the child devices might not exist yet at the time this +# rule is executed. To work around this we'll trigger the parent from +# the child if we notice that the parent wasn't recognized yet. + +# Match parent +SUBSYSTEM=="usb", ATTR{idVendor}=="058f", ATTR{idProduct}=="6254", \ + ATTR{%k.2/idVendor}=="17e9", ATTR{%k.2/idProduct}=="401a", ATTR{%k.2/product}=="mimo inc", \ + ENV{ID_AUTOSEAT}="1", ENV{ID_AVOID_LOOP}="1" + +# Match child, look for parent's ID_AVOID_LOOP +SUBSYSTEM=="usb", ATTR{idVendor}=="17e9", ATTR{idProduct}=="401a", ATTR{product}=="mimo inc", \ + ATTR{../idVendor}=="058f", ATTR{../idProduct}=="6254", \ + IMPORT{parent}="ID_AVOID_LOOP" + +# Match child, retrigger parent +SUBSYSTEM=="usb", ATTR{idVendor}=="17e9", ATTR{idProduct}=="401a", ATTR{product}=="mimo inc", \ + ATTR{../idVendor}=="058f", ATTR{../idProduct}=="6254", \ + ENV{ID_AVOID_LOOP}=="", \ + RUN+="@rootbindir@/udevadm trigger --parent-match=%p/.." + +TAG=="seat", ENV{ID_PATH}=="", IMPORT{builtin}="path_id" +TAG=="seat", ENV{ID_FOR_SEAT}=="", ENV{ID_PATH_TAG}!="", ENV{ID_FOR_SEAT}="$env{SUBSYSTEM}-$env{ID_PATH_TAG}" + +SUBSYSTEM=="input", ATTR{name}=="Wiebetech LLC Wiebetech", RUN+="@rootbindir@/loginctl lock-sessions" + +LABEL="seat_end" diff --git a/src/grp-login/systemd-logind/73-seat-late.rules.in b/src/grp-login/systemd-logind/73-seat-late.rules.in new file mode 100644 index 0000000000..901df750fd --- /dev/null +++ b/src/grp-login/systemd-logind/73-seat-late.rules.in @@ -0,0 +1,17 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +ACTION=="remove", GOTO="seat_late_end" + +ENV{ID_SEAT}=="", ENV{ID_AUTOSEAT}=="1", ENV{ID_FOR_SEAT}!="", ENV{ID_SEAT}="seat-$env{ID_FOR_SEAT}" +ENV{ID_SEAT}=="", IMPORT{parent}="ID_SEAT" + +ENV{ID_SEAT}!="", TAG+="$env{ID_SEAT}" + +TAG=="uaccess", ENV{MAJOR}!="", RUN{builtin}+="uaccess" + +LABEL="seat_late_end" diff --git a/src/grp-login/systemd-logind/GNUmakefile b/src/grp-login/systemd-logind/GNUmakefile new file mode 120000 index 0000000000..95e5924740 --- /dev/null +++ b/src/grp-login/systemd-logind/GNUmakefile @@ -0,0 +1 @@ +../../../GNUmakefile
\ No newline at end of file diff --git a/src/grp-login/systemd-logind/Makefile b/src/grp-login/systemd-logind/Makefile new file mode 100644 index 0000000000..24de945818 --- /dev/null +++ b/src/grp-login/systemd-logind/Makefile @@ -0,0 +1,132 @@ +# -*- Mode: makefile; indent-tabs-mode: t -*- +# +# This file is part of systemd. +# +# Copyright 2010-2012 Lennart Poettering +# Copyright 2010-2012 Kay Sievers +# Copyright 2013 Zbigniew Jędrzejewski-Szmek +# Copyright 2013 David Strauss +# Copyright 2016 Luke Shumaker +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. +# +# systemd is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public License +# along with systemd; If not, see <http://www.gnu.org/licenses/>. +include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk +include $(topsrcdir)/build-aux/Makefile.head.mk + +ifneq ($(ENABLE_LOGIND),) + +systemd_logind_SOURCES = \ + src/login/logind.c \ + src/login/logind.h + +nodist_systemd_logind_SOURCES = \ + src/login/logind-gperf.c + +systemd_logind_LDADD = \ + liblogind-core.la + +liblogind_core_la_SOURCES = \ + src/login/logind-core.c \ + src/login/logind-device.c \ + src/login/logind-device.h \ + src/login/logind-button.c \ + src/login/logind-button.h \ + src/login/logind-action.c \ + src/login/logind-action.h \ + src/login/logind-seat.c \ + src/login/logind-seat.h \ + src/login/logind-session.c \ + src/login/logind-session.h \ + src/login/logind-session-device.c \ + src/login/logind-session-device.h \ + src/login/logind-user.c \ + src/login/logind-user.h \ + src/login/logind-inhibit.c \ + src/login/logind-inhibit.h \ + src/login/logind-dbus.c \ + src/login/logind-session-dbus.c \ + src/login/logind-seat-dbus.c \ + src/login/logind-user-dbus.c \ + src/login/logind-utmp.c \ + src/login/logind-acl.h + +liblogind_core_la_LIBADD = \ + libsystemd-shared.la + +ifneq ($(HAVE_ACL),) +liblogind_core_la_SOURCES += \ + src/login/logind-acl.c +endif # HAVE_ACL + +noinst_LTLIBRARIES += \ + liblogind-core.la + +rootlibexec_PROGRAMS += \ + systemd-logind + +nodist_systemunit_DATA += \ + units/systemd-logind.service + +dist_systemunit_DATA += \ + units/user.slice + +dist_systemunit_DATA_busnames += \ + units/org.freedesktop.login1.busname + +dist_dbussystemservice_DATA += \ + src/login/org.freedesktop.login1.service + +dist_dbuspolicy_DATA += \ + src/login/org.freedesktop.login1.conf + +nodist_pkgsysconf_DATA += \ + src/login/logind.conf + +polkitpolicy_files += \ + src/login/org.freedesktop.login1.policy + +INSTALL_DIRS += \ + $(systemdstatedir) + +MULTI_USER_TARGET_WANTS += \ + systemd-logind.service + +SYSTEM_UNIT_ALIASES += \ + systemd-logind.service dbus-org.freedesktop.login1.service + +BUSNAMES_TARGET_WANTS += \ + org.freedesktop.login1.busname + +dist_udevrules_DATA += \ + src/login/70-uaccess.rules \ + src/login/70-power-switch.rules + +nodist_udevrules_DATA += \ + src/login/71-seat.rules \ + src/login/73-seat-late.rules + +endif # ENABLE_LOGIND + +polkitpolicy_in_files += \ + src/login/org.freedesktop.login1.policy.in + +gperf_gperf_sources += \ + src/login/logind-gperf.gperf + +EXTRA_DIST += \ + src/login/71-seat.rules.in \ + src/login/73-seat-late.rules.in \ + units/systemd-logind.service.in \ + src/login/logind.conf.in + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/grp-login/systemd-logind/logind-acl.c b/src/grp-login/systemd-logind/logind-acl.c new file mode 100644 index 0000000000..9261e59122 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-acl.c @@ -0,0 +1,293 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <string.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/dirent-util.h" +#include "systemd-basic/escape.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/set.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/util.h" +#include "systemd-shared/acl-util.h" +#include "systemd-shared/udev-util.h" + +#include "logind-acl.h" + +static int flush_acl(acl_t acl) { + acl_entry_t i; + int found; + bool changed = false; + + assert(acl); + + for (found = acl_get_entry(acl, ACL_FIRST_ENTRY, &i); + found > 0; + found = acl_get_entry(acl, ACL_NEXT_ENTRY, &i)) { + + acl_tag_t tag; + + if (acl_get_tag_type(i, &tag) < 0) + return -errno; + + if (tag != ACL_USER) + continue; + + if (acl_delete_entry(acl, i) < 0) + return -errno; + + changed = true; + } + + if (found < 0) + return -errno; + + return changed; +} + +int devnode_acl(const char *path, + bool flush, + bool del, uid_t old_uid, + bool add, uid_t new_uid) { + + acl_t acl; + int r = 0; + bool changed = false; + + assert(path); + + acl = acl_get_file(path, ACL_TYPE_ACCESS); + if (!acl) + return -errno; + + if (flush) { + + r = flush_acl(acl); + if (r < 0) + goto finish; + if (r > 0) + changed = true; + + } else if (del && old_uid > 0) { + acl_entry_t entry; + + r = acl_find_uid(acl, old_uid, &entry); + if (r < 0) + goto finish; + + if (r > 0) { + if (acl_delete_entry(acl, entry) < 0) { + r = -errno; + goto finish; + } + + changed = true; + } + } + + if (add && new_uid > 0) { + acl_entry_t entry; + acl_permset_t permset; + int rd, wt; + + r = acl_find_uid(acl, new_uid, &entry); + if (r < 0) + goto finish; + + if (r == 0) { + if (acl_create_entry(&acl, &entry) < 0) { + r = -errno; + goto finish; + } + + if (acl_set_tag_type(entry, ACL_USER) < 0 || + acl_set_qualifier(entry, &new_uid) < 0) { + r = -errno; + goto finish; + } + } + + if (acl_get_permset(entry, &permset) < 0) { + r = -errno; + goto finish; + } + + rd = acl_get_perm(permset, ACL_READ); + if (rd < 0) { + r = -errno; + goto finish; + } + + wt = acl_get_perm(permset, ACL_WRITE); + if (wt < 0) { + r = -errno; + goto finish; + } + + if (!rd || !wt) { + + if (acl_add_perm(permset, ACL_READ|ACL_WRITE) < 0) { + r = -errno; + goto finish; + } + + changed = true; + } + } + + if (!changed) + goto finish; + + if (acl_calc_mask(&acl) < 0) { + r = -errno; + goto finish; + } + + if (acl_set_file(path, ACL_TYPE_ACCESS, acl) < 0) { + r = -errno; + goto finish; + } + + r = 0; + +finish: + acl_free(acl); + + return r; +} + +int devnode_acl_all(struct udev *udev, + const char *seat, + bool flush, + bool del, uid_t old_uid, + bool add, uid_t new_uid) { + + _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; + struct udev_list_entry *item = NULL, *first = NULL; + _cleanup_set_free_free_ Set *nodes = NULL; + _cleanup_closedir_ DIR *dir = NULL; + struct dirent *dent; + Iterator i; + char *n; + int r; + + assert(udev); + + nodes = set_new(&string_hash_ops); + if (!nodes) + return -ENOMEM; + + e = udev_enumerate_new(udev); + if (!e) + return -ENOMEM; + + if (isempty(seat)) + seat = "seat0"; + + /* We can only match by one tag in libudev. We choose + * "uaccess" for that. If we could match for two tags here we + * could add the seat name as second match tag, but this would + * be hardly optimizable in libudev, and hence checking the + * second tag manually in our loop is a good solution. */ + r = udev_enumerate_add_match_tag(e, "uaccess"); + if (r < 0) + return r; + + r = udev_enumerate_add_match_is_initialized(e); + if (r < 0) + return r; + + r = udev_enumerate_scan_devices(e); + if (r < 0) + return r; + + first = udev_enumerate_get_list_entry(e); + udev_list_entry_foreach(item, first) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + const char *node, *sn; + + d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); + if (!d) + return -ENOMEM; + + sn = udev_device_get_property_value(d, "ID_SEAT"); + if (isempty(sn)) + sn = "seat0"; + + if (!streq(seat, sn)) + continue; + + node = udev_device_get_devnode(d); + /* In case people mistag devices with nodes, we need to ignore this */ + if (!node) + continue; + + n = strdup(node); + if (!n) + return -ENOMEM; + + log_debug("Found udev node %s for seat %s", n, seat); + r = set_consume(nodes, n); + if (r < 0) + return r; + } + + /* udev exports "dead" device nodes to allow module on-demand loading, + * these devices are not known to the kernel at this moment */ + dir = opendir("/run/udev/static_node-tags/uaccess"); + if (dir) { + FOREACH_DIRENT(dent, dir, return -errno) { + _cleanup_free_ char *unescaped_devname = NULL; + + if (cunescape(dent->d_name, UNESCAPE_RELAX, &unescaped_devname) < 0) + return -ENOMEM; + + n = strappend("/dev/", unescaped_devname); + if (!n) + return -ENOMEM; + + log_debug("Found static node %s for seat %s", n, seat); + r = set_consume(nodes, n); + if (r == -EEXIST) + continue; + if (r < 0) + return r; + } + } + + r = 0; + SET_FOREACH(n, nodes, i) { + int k; + + log_debug("Changing ACLs at %s for seat %s (uid "UID_FMT"→"UID_FMT"%s%s)", + n, seat, old_uid, new_uid, + del ? " del" : "", add ? " add" : ""); + + k = devnode_acl(n, flush, del, old_uid, add, new_uid); + if (k == -ENOENT) + log_debug("Device %s disappeared while setting ACLs", n); + else if (k < 0 && r == 0) + r = k; + } + + return r; +} diff --git a/src/grp-login/systemd-logind/logind-acl.h b/src/grp-login/systemd-logind/logind-acl.h new file mode 100644 index 0000000000..7d324ea90a --- /dev/null +++ b/src/grp-login/systemd-logind/logind-acl.h @@ -0,0 +1,56 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <stdbool.h> +#include <sys/types.h> + +#include <libudev.h> + +#ifdef HAVE_ACL + +int devnode_acl(const char *path, + bool flush, + bool del, uid_t old_uid, + bool add, uid_t new_uid); + +int devnode_acl_all(struct udev *udev, + const char *seat, + bool flush, + bool del, uid_t old_uid, + bool add, uid_t new_uid); +#else + +static inline int devnode_acl(const char *path, + bool flush, + bool del, uid_t old_uid, + bool add, uid_t new_uid) { + return 0; +} + +static inline int devnode_acl_all(struct udev *udev, + const char *seat, + bool flush, + bool del, uid_t old_uid, + bool add, uid_t new_uid) { + return 0; +} + +#endif diff --git a/src/grp-login/systemd-logind/logind-action.c b/src/grp-login/systemd-logind/logind-action.c new file mode 100644 index 0000000000..3115284564 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-action.c @@ -0,0 +1,179 @@ +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <unistd.h> + +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/process-util.h" +#include "systemd-basic/special.h" +#include "systemd-basic/string-table.h" +#include "systemd-basic/terminal-util.h" +#include "systemd-basic/user-util.h" +#include "systemd-shared/conf-parser.h" +#include "systemd-shared/sleep-config.h" + +#include "logind-action.h" + +int manager_handle_action( + Manager *m, + InhibitWhat inhibit_key, + HandleAction handle, + bool ignore_inhibited, + bool is_edge) { + + static const char * const message_table[_HANDLE_ACTION_MAX] = { + [HANDLE_POWEROFF] = "Powering Off...", + [HANDLE_REBOOT] = "Rebooting...", + [HANDLE_HALT] = "Halting...", + [HANDLE_KEXEC] = "Rebooting via kexec...", + [HANDLE_SUSPEND] = "Suspending...", + [HANDLE_HIBERNATE] = "Hibernating...", + [HANDLE_HYBRID_SLEEP] = "Hibernating and suspending..." + }; + + static const char * const target_table[_HANDLE_ACTION_MAX] = { + [HANDLE_POWEROFF] = SPECIAL_POWEROFF_TARGET, + [HANDLE_REBOOT] = SPECIAL_REBOOT_TARGET, + [HANDLE_HALT] = SPECIAL_HALT_TARGET, + [HANDLE_KEXEC] = SPECIAL_KEXEC_TARGET, + [HANDLE_SUSPEND] = SPECIAL_SUSPEND_TARGET, + [HANDLE_HIBERNATE] = SPECIAL_HIBERNATE_TARGET, + [HANDLE_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET + }; + + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + InhibitWhat inhibit_operation; + Inhibitor *offending = NULL; + bool supported; + int r; + + assert(m); + + /* If the key handling is turned off, don't do anything */ + if (handle == HANDLE_IGNORE) { + log_debug("Refusing operation, as it is turned off."); + return 0; + } + + if (inhibit_key == INHIBIT_HANDLE_LID_SWITCH) { + /* If the last system suspend or startup is too close, + * let's not suspend for now, to give USB docking + * stations some time to settle so that we can + * properly watch its displays. */ + if (m->lid_switch_ignore_event_source) { + log_debug("Ignoring lid switch request, system startup or resume too close."); + return 0; + } + } + + /* If the key handling is inhibited, don't do anything */ + if (inhibit_key > 0) { + if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0, NULL)) { + log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key)); + return 0; + } + } + + /* Locking is handled differently from the rest. */ + if (handle == HANDLE_LOCK) { + + if (!is_edge) + return 0; + + log_info("Locking sessions..."); + session_send_lock_all(m, true); + return 1; + } + + if (handle == HANDLE_SUSPEND) + supported = can_sleep("suspend") > 0; + else if (handle == HANDLE_HIBERNATE) + supported = can_sleep("hibernate") > 0; + else if (handle == HANDLE_HYBRID_SLEEP) + supported = can_sleep("hybrid-sleep") > 0; + else if (handle == HANDLE_KEXEC) + supported = access(KEXEC, X_OK) >= 0; + else + supported = true; + + if (!supported) { + log_warning("Requested operation not supported, ignoring."); + return -EOPNOTSUPP; + } + + if (m->action_what) { + log_debug("Action already in progress, ignoring."); + return -EALREADY; + } + + inhibit_operation = IN_SET(handle, HANDLE_SUSPEND, HANDLE_HIBERNATE, HANDLE_HYBRID_SLEEP) ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN; + + /* If the actual operation is inhibited, warn and fail */ + if (!ignore_inhibited && + manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0, &offending)) { + _cleanup_free_ char *comm = NULL, *u = NULL; + + get_process_comm(offending->pid, &comm); + u = uid_to_name(offending->uid); + + /* If this is just a recheck of the lid switch then don't warn about anything */ + if (!is_edge) { + log_debug("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.", + inhibit_what_to_string(inhibit_operation), + offending->uid, strna(u), + offending->pid, strna(comm)); + return 0; + } + + log_error("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.", + inhibit_what_to_string(inhibit_operation), + offending->uid, strna(u), + offending->pid, strna(comm)); + + return -EPERM; + } + + log_info("%s", message_table[handle]); + + r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error); + if (r < 0) { + log_error("Failed to execute operation: %s", bus_error_message(&error, r)); + return r; + } + + return 1; +} + +static const char* const handle_action_table[_HANDLE_ACTION_MAX] = { + [HANDLE_IGNORE] = "ignore", + [HANDLE_POWEROFF] = "poweroff", + [HANDLE_REBOOT] = "reboot", + [HANDLE_HALT] = "halt", + [HANDLE_KEXEC] = "kexec", + [HANDLE_SUSPEND] = "suspend", + [HANDLE_HIBERNATE] = "hibernate", + [HANDLE_HYBRID_SLEEP] = "hybrid-sleep", + [HANDLE_LOCK] = "lock" +}; + +DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction); +DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting"); diff --git a/src/grp-login/systemd-logind/logind-action.h b/src/grp-login/systemd-logind/logind-action.h new file mode 100644 index 0000000000..fb40ae48d2 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-action.h @@ -0,0 +1,49 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +typedef enum HandleAction { + HANDLE_IGNORE, + HANDLE_POWEROFF, + HANDLE_REBOOT, + HANDLE_HALT, + HANDLE_KEXEC, + HANDLE_SUSPEND, + HANDLE_HIBERNATE, + HANDLE_HYBRID_SLEEP, + HANDLE_LOCK, + _HANDLE_ACTION_MAX, + _HANDLE_ACTION_INVALID = -1 +} HandleAction; + +#include "logind-inhibit.h" +#include "logind.h" + +int manager_handle_action( + Manager *m, + InhibitWhat inhibit_key, + HandleAction handle, + bool ignore_inhibited, + bool is_edge); + +const char* handle_action_to_string(HandleAction h) _const_; +HandleAction handle_action_from_string(const char *s) _pure_; + +int config_parse_handle_action(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); diff --git a/src/grp-login/systemd-logind/logind-button.c b/src/grp-login/systemd-logind/logind-button.c new file mode 100644 index 0000000000..60e9f0a476 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-button.c @@ -0,0 +1,287 @@ +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <fcntl.h> +#include <string.h> +#include <sys/ioctl.h> +#include <unistd.h> + +#include <linux/input.h> + +#include <systemd/sd-messages.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/util.h" + +#include "logind-button.h" + +Button* button_new(Manager *m, const char *name) { + Button *b; + + assert(m); + assert(name); + + b = new0(Button, 1); + if (!b) + return NULL; + + b->name = strdup(name); + if (!b->name) + return mfree(b); + + if (hashmap_put(m->buttons, b->name, b) < 0) { + free(b->name); + return mfree(b); + } + + b->manager = m; + b->fd = -1; + + return b; +} + +void button_free(Button *b) { + assert(b); + + hashmap_remove(b->manager->buttons, b->name); + + sd_event_source_unref(b->io_event_source); + sd_event_source_unref(b->check_event_source); + + if (b->fd >= 0) + /* If the device has been unplugged close() returns + * ENODEV, let's ignore this, hence we don't use + * safe_close() */ + (void) close(b->fd); + + free(b->name); + free(b->seat); + free(b); +} + +int button_set_seat(Button *b, const char *sn) { + char *s; + + assert(b); + assert(sn); + + s = strdup(sn); + if (!s) + return -ENOMEM; + + free(b->seat); + b->seat = s; + + return 0; +} + +static void button_lid_switch_handle_action(Manager *manager, bool is_edge) { + HandleAction handle_action; + + assert(manager); + + /* If we are docked, handle the lid switch differently */ + if (manager_is_docked_or_external_displays(manager)) + handle_action = manager->handle_lid_switch_docked; + else + handle_action = manager->handle_lid_switch; + + manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge); +} + +static int button_recheck(sd_event_source *e, void *userdata) { + Button *b = userdata; + + assert(b); + assert(b->lid_closed); + + button_lid_switch_handle_action(b->manager, false); + return 1; +} + +static int button_install_check_event_source(Button *b) { + int r; + assert(b); + + /* Install a post handler, so that we keep rechecking as long as the lid is closed. */ + + if (b->check_event_source) + return 0; + + r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b); + if (r < 0) + return r; + + return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1); +} + +static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + Button *b = userdata; + struct input_event ev; + ssize_t l; + + assert(s); + assert(fd == b->fd); + assert(b); + + l = read(b->fd, &ev, sizeof(ev)); + if (l < 0) + return errno != EAGAIN ? -errno : 0; + if ((size_t) l < sizeof(ev)) + return -EIO; + + if (ev.type == EV_KEY && ev.value > 0) { + + switch (ev.code) { + + case KEY_POWER: + case KEY_POWER2: + log_struct(LOG_INFO, + LOG_MESSAGE("Power key pressed."), + LOG_MESSAGE_ID(SD_MESSAGE_POWER_KEY), + NULL); + + manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true); + break; + + /* The kernel is a bit confused here: + + KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend" + KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate" + */ + + case KEY_SLEEP: + log_struct(LOG_INFO, + LOG_MESSAGE("Suspend key pressed."), + LOG_MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY), + NULL); + + manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true); + break; + + case KEY_SUSPEND: + log_struct(LOG_INFO, + LOG_MESSAGE("Hibernate key pressed."), + LOG_MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY), + NULL); + + manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true); + break; + } + + } else if (ev.type == EV_SW && ev.value > 0) { + + if (ev.code == SW_LID) { + log_struct(LOG_INFO, + LOG_MESSAGE("Lid closed."), + LOG_MESSAGE_ID(SD_MESSAGE_LID_CLOSED), + NULL); + + b->lid_closed = true; + button_lid_switch_handle_action(b->manager, true); + button_install_check_event_source(b); + + } else if (ev.code == SW_DOCK) { + log_struct(LOG_INFO, + LOG_MESSAGE("System docked."), + LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED), + NULL); + + b->docked = true; + } + + } else if (ev.type == EV_SW && ev.value == 0) { + + if (ev.code == SW_LID) { + log_struct(LOG_INFO, + LOG_MESSAGE("Lid opened."), + LOG_MESSAGE_ID(SD_MESSAGE_LID_OPENED), + NULL); + + b->lid_closed = false; + b->check_event_source = sd_event_source_unref(b->check_event_source); + + } else if (ev.code == SW_DOCK) { + log_struct(LOG_INFO, + LOG_MESSAGE("System undocked."), + LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED), + NULL); + + b->docked = false; + } + } + + return 0; +} + +int button_open(Button *b) { + char *p, name[256]; + int r; + + assert(b); + + b->fd = safe_close(b->fd); + + p = strjoina("/dev/input/", b->name); + + b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); + if (b->fd < 0) + return log_warning_errno(errno, "Failed to open %s: %m", b->name); + + if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) { + r = log_error_errno(errno, "Failed to get input name: %m"); + goto fail; + } + + r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b); + if (r < 0) { + log_error_errno(r, "Failed to add button event: %m"); + goto fail; + } + + log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name); + + return 0; + +fail: + b->fd = safe_close(b->fd); + return r; +} + +int button_check_switches(Button *b) { + uint8_t switches[SW_MAX/8+1] = {}; + assert(b); + + if (b->fd < 0) + return -EINVAL; + + if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0) + return -errno; + + b->lid_closed = (switches[SW_LID/8] >> (SW_LID % 8)) & 1; + b->docked = (switches[SW_DOCK/8] >> (SW_DOCK % 8)) & 1; + + if (b->lid_closed) + button_install_check_event_source(b); + + return 0; +} diff --git a/src/grp-login/systemd-logind/logind-button.h b/src/grp-login/systemd-logind/logind-button.h new file mode 100644 index 0000000000..f30cba2959 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-button.h @@ -0,0 +1,44 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +typedef struct Button Button; + +#include "logind.h" + +struct Button { + Manager *manager; + + sd_event_source *io_event_source; + sd_event_source *check_event_source; + + char *name; + char *seat; + int fd; + + bool lid_closed; + bool docked; +}; + +Button* button_new(Manager *m, const char *name); +void button_free(Button*b); +int button_open(Button *b); +int button_set_seat(Button *b, const char *sn); +int button_check_switches(Button *b); diff --git a/src/grp-login/systemd-logind/logind-core.c b/src/grp-login/systemd-logind/logind-core.c new file mode 100644 index 0000000000..b4bb502aac --- /dev/null +++ b/src/grp-login/systemd-logind/logind-core.c @@ -0,0 +1,560 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <fcntl.h> +#include <pwd.h> +#include <sys/ioctl.h> +#include <sys/types.h> + +#include <linux/vt.h> + +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/cgroup-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/terminal-util.h" +#include "systemd-basic/user-util.h" +#include "systemd-shared/udev-util.h" + +#include "logind.h" + +int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device) { + Device *d; + + assert(m); + assert(sysfs); + + d = hashmap_get(m->devices, sysfs); + if (d) + /* we support adding master-flags, but not removing them */ + d->master = d->master || master; + else { + d = device_new(m, sysfs, master); + if (!d) + return -ENOMEM; + } + + if (_device) + *_device = d; + + return 0; +} + +int manager_add_seat(Manager *m, const char *id, Seat **_seat) { + Seat *s; + + assert(m); + assert(id); + + s = hashmap_get(m->seats, id); + if (!s) { + s = seat_new(m, id); + if (!s) + return -ENOMEM; + } + + if (_seat) + *_seat = s; + + return 0; +} + +int manager_add_session(Manager *m, const char *id, Session **_session) { + Session *s; + + assert(m); + assert(id); + + s = hashmap_get(m->sessions, id); + if (!s) { + s = session_new(m, id); + if (!s) + return -ENOMEM; + } + + if (_session) + *_session = s; + + return 0; +} + +int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) { + User *u; + int r; + + assert(m); + assert(name); + + u = hashmap_get(m->users, UID_TO_PTR(uid)); + if (!u) { + r = user_new(&u, m, uid, gid, name); + if (r < 0) + return r; + } + + if (_user) + *_user = u; + + return 0; +} + +int manager_add_user_by_name(Manager *m, const char *name, User **_user) { + uid_t uid; + gid_t gid; + int r; + + assert(m); + assert(name); + + r = get_user_creds(&name, &uid, &gid, NULL, NULL); + if (r < 0) + return r; + + return manager_add_user(m, uid, gid, name, _user); +} + +int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) { + struct passwd *p; + + assert(m); + + errno = 0; + p = getpwuid(uid); + if (!p) + return errno > 0 ? -errno : -ENOENT; + + return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user); +} + +int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) { + Inhibitor *i; + + assert(m); + assert(id); + + i = hashmap_get(m->inhibitors, id); + if (i) { + if (_inhibitor) + *_inhibitor = i; + + return 0; + } + + i = inhibitor_new(m, id); + if (!i) + return -ENOMEM; + + if (_inhibitor) + *_inhibitor = i; + + return 0; +} + +int manager_add_button(Manager *m, const char *name, Button **_button) { + Button *b; + + assert(m); + assert(name); + + b = hashmap_get(m->buttons, name); + if (!b) { + b = button_new(m, name); + if (!b) + return -ENOMEM; + } + + if (_button) + *_button = b; + + return 0; +} + +int manager_process_seat_device(Manager *m, struct udev_device *d) { + Device *device; + int r; + + assert(m); + + if (streq_ptr(udev_device_get_action(d), "remove")) { + + device = hashmap_get(m->devices, udev_device_get_syspath(d)); + if (!device) + return 0; + + seat_add_to_gc_queue(device->seat); + device_free(device); + + } else { + const char *sn; + Seat *seat = NULL; + bool master; + + sn = udev_device_get_property_value(d, "ID_SEAT"); + if (isempty(sn)) + sn = "seat0"; + + if (!seat_name_is_valid(sn)) { + log_warning("Device with invalid seat name %s found, ignoring.", sn); + return 0; + } + + seat = hashmap_get(m->seats, sn); + master = udev_device_has_tag(d, "master-of-seat"); + + /* Ignore non-master devices for unknown seats */ + if (!master && !seat) + return 0; + + r = manager_add_device(m, udev_device_get_syspath(d), master, &device); + if (r < 0) + return r; + + if (!seat) { + r = manager_add_seat(m, sn, &seat); + if (r < 0) { + if (!device->seat) + device_free(device); + + return r; + } + } + + device_attach(device, seat); + seat_start(seat); + } + + return 0; +} + +int manager_process_button_device(Manager *m, struct udev_device *d) { + Button *b; + + int r; + + assert(m); + + if (streq_ptr(udev_device_get_action(d), "remove")) { + + b = hashmap_get(m->buttons, udev_device_get_sysname(d)); + if (!b) + return 0; + + button_free(b); + + } else { + const char *sn; + + r = manager_add_button(m, udev_device_get_sysname(d), &b); + if (r < 0) + return r; + + sn = udev_device_get_property_value(d, "ID_SEAT"); + if (isempty(sn)) + sn = "seat0"; + + button_set_seat(b, sn); + button_open(b); + } + + return 0; +} + +int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) { + _cleanup_free_ char *unit = NULL; + Session *s; + int r; + + assert(m); + + if (pid < 1) + return -EINVAL; + + r = cg_pid_get_unit(pid, &unit); + if (r < 0) + return 0; + + s = hashmap_get(m->session_units, unit); + if (!s) + return 0; + + if (session) + *session = s; + return 1; +} + +int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) { + _cleanup_free_ char *unit = NULL; + User *u; + int r; + + assert(m); + assert(user); + + if (pid < 1) + return -EINVAL; + + r = cg_pid_get_slice(pid, &unit); + if (r < 0) + return 0; + + u = hashmap_get(m->user_units, unit); + if (!u) + return 0; + + *user = u; + return 1; +} + +int manager_get_idle_hint(Manager *m, dual_timestamp *t) { + Session *s; + bool idle_hint; + dual_timestamp ts = DUAL_TIMESTAMP_NULL; + Iterator i; + + assert(m); + + idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0, NULL); + + HASHMAP_FOREACH(s, m->sessions, i) { + dual_timestamp k; + int ih; + + ih = session_get_idle_hint(s, &k); + if (ih < 0) + return ih; + + if (!ih) { + if (!idle_hint) { + if (k.monotonic < ts.monotonic) + ts = k; + } else { + idle_hint = false; + ts = k; + } + } else if (idle_hint) { + + if (k.monotonic > ts.monotonic) + ts = k; + } + } + + if (t) + *t = ts; + + return idle_hint; +} + +bool manager_shall_kill(Manager *m, const char *user) { + assert(m); + assert(user); + + if (!m->kill_exclude_users && streq(user, "root")) + return false; + + if (strv_contains(m->kill_exclude_users, user)) + return false; + + if (!strv_isempty(m->kill_only_users)) + return strv_contains(m->kill_only_users, user); + + return m->kill_user_processes; +} + +static int vt_is_busy(unsigned int vtnr) { + struct vt_stat vt_stat; + int r = 0; + _cleanup_close_ int fd; + + assert(vtnr >= 1); + + /* We explicitly open /dev/tty1 here instead of /dev/tty0. If + * we'd open the latter we'd open the foreground tty which + * hence would be unconditionally busy. By opening /dev/tty1 + * we avoid this. Since tty1 is special and needs to be an + * explicitly loaded getty or DM this is safe. */ + + fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC); + if (fd < 0) + return -errno; + + if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0) + r = -errno; + else + r = !!(vt_stat.v_state & (1 << vtnr)); + + return r; +} + +int manager_spawn_autovt(Manager *m, unsigned int vtnr) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + char name[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)]; + int r; + + assert(m); + assert(vtnr >= 1); + + if (vtnr > m->n_autovts && + vtnr != m->reserve_vt) + return 0; + + if (vtnr != m->reserve_vt) { + /* If this is the reserved TTY, we'll start the getty + * on it in any case, but otherwise only if it is not + * busy. */ + + r = vt_is_busy(vtnr); + if (r < 0) + return r; + else if (r > 0) + return -EBUSY; + } + + snprintf(name, sizeof(name), "autovt@tty%u.service", vtnr); + r = sd_bus_call_method( + m->bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "StartUnit", + &error, + NULL, + "ss", name, "fail"); + if (r < 0) + log_error("Failed to start %s: %s", name, bus_error_message(&error, r)); + + return r; +} + +static bool manager_is_docked(Manager *m) { + Iterator i; + Button *b; + + HASHMAP_FOREACH(b, m->buttons, i) + if (b->docked) + return true; + + return false; +} + +static int manager_count_external_displays(Manager *m) { + _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; + struct udev_list_entry *item = NULL, *first = NULL; + int r; + int n = 0; + + e = udev_enumerate_new(m->udev); + if (!e) + return -ENOMEM; + + r = udev_enumerate_add_match_subsystem(e, "drm"); + if (r < 0) + return r; + + r = udev_enumerate_scan_devices(e); + if (r < 0) + return r; + + first = udev_enumerate_get_list_entry(e); + udev_list_entry_foreach(item, first) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + struct udev_device *p; + const char *status, *enabled, *dash, *nn, *i; + bool external = false; + + d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); + if (!d) + return -ENOMEM; + + p = udev_device_get_parent(d); + if (!p) + continue; + + /* If the parent shares the same subsystem as the + * device we are looking at then it is a connector, + * which is what we are interested in. */ + if (!streq_ptr(udev_device_get_subsystem(p), "drm")) + continue; + + nn = udev_device_get_sysname(d); + if (!nn) + continue; + + /* Ignore internal displays: the type is encoded in + * the sysfs name, as the second dash separated item + * (the first is the card name, the last the connector + * number). We implement a whitelist of external + * displays here, rather than a whitelist, to ensure + * we don't block suspends too eagerly. */ + dash = strchr(nn, '-'); + if (!dash) + continue; + + dash++; + FOREACH_STRING(i, "VGA-", "DVI-I-", "DVI-D-", "DVI-A-" + "Composite-", "SVIDEO-", "Component-", + "DIN-", "DP-", "HDMI-A-", "HDMI-B-", "TV-") { + + if (startswith(dash, i)) { + external = true; + break; + } + } + if (!external) + continue; + + /* Ignore ports that are not enabled */ + enabled = udev_device_get_sysattr_value(d, "enabled"); + if (!enabled) + continue; + if (!streq_ptr(enabled, "enabled")) + continue; + + /* We count any connector which is not explicitly + * "disconnected" as connected. */ + status = udev_device_get_sysattr_value(d, "status"); + if (!streq_ptr(status, "disconnected")) + n++; + } + + return n; +} + +bool manager_is_docked_or_external_displays(Manager *m) { + int n; + + /* If we are docked don't react to lid closing */ + if (manager_is_docked(m)) { + log_debug("System is docked."); + return true; + } + + /* If we have more than one display connected, + * assume that we are docked. */ + n = manager_count_external_displays(m); + if (n < 0) + log_warning_errno(n, "Display counting failed: %m"); + else if (n >= 1) { + log_debug("External (%i) displays connected.", n); + return true; + } + + return false; +} diff --git a/src/grp-login/systemd-logind/logind-dbus.c b/src/grp-login/systemd-logind/logind-dbus.c new file mode 100644 index 0000000000..c4b962ec92 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-dbus.c @@ -0,0 +1,3170 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <pwd.h> +#include <string.h> +#include <unistd.h> + +#include <systemd/sd-messages.h> + +#include "sd-bus/bus-common-errors.h" +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/audit-util.h" +#include "systemd-basic/dirent-util.h" +#include "systemd-basic/escape.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio-label.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/fs-util.h" +#include "systemd-basic/mkdir.h" +#include "systemd-basic/path-util.h" +#include "systemd-basic/process-util.h" +#include "systemd-basic/selinux-util.h" +#include "systemd-basic/special.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/terminal-util.h" +#include "systemd-basic/unit-name.h" +#include "systemd-basic/user-util.h" +#include "systemd-shared/efivars.h" +#include "systemd-shared/sleep-config.h" +#include "systemd-shared/udev-util.h" +#include "systemd-shared/utmp-wtmp.h" + +#include "logind.h" + +int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + Session *session; + int r; + + assert(m); + assert(message); + assert(ret); + + if (isempty(name)) { + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_session(creds, &name); + if (r < 0) + return r; + } + + session = hashmap_get(m->sessions, name); + if (!session) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + + *ret = session; + return 0; +} + +int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) { + User *user; + int r; + + assert(m); + assert(message); + assert(ret); + + if (uid == UID_INVALID) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + + /* Note that we get the owner UID of the session, not the actual client UID here! */ + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_owner_uid(creds, &uid); + if (r < 0) + return r; + } + + user = hashmap_get(m->users, UID_TO_PTR(uid)); + if (!user) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid); + + *ret = user; + return 0; +} + +int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) { + Seat *seat; + int r; + + assert(m); + assert(message); + assert(ret); + + if (isempty(name)) { + Session *session; + + r = manager_get_session_from_creds(m, message, NULL, error, &session); + if (r < 0) + return r; + + seat = session->seat; + if (!seat) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat."); + } else { + seat = hashmap_get(m->seats, name); + if (!seat) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name); + } + + *ret = seat; + return 0; +} + +static int property_get_idle_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Manager *m = userdata; + + assert(bus); + assert(reply); + assert(m); + + return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0); +} + +static int property_get_idle_since_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Manager *m = userdata; + dual_timestamp t = DUAL_TIMESTAMP_NULL; + + assert(bus); + assert(reply); + assert(m); + + manager_get_idle_hint(m, &t); + + return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic); +} + +static int property_get_inhibited( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Manager *m = userdata; + InhibitWhat w; + + assert(bus); + assert(reply); + assert(m); + + w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY); + + return sd_bus_message_append(reply, "s", inhibit_what_to_string(w)); +} + +static int property_get_preparing( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Manager *m = userdata; + bool b; + + assert(bus); + assert(reply); + assert(m); + + if (streq(property, "PreparingForShutdown")) + b = !!(m->action_what & INHIBIT_SHUTDOWN); + else + b = !!(m->action_what & INHIBIT_SLEEP); + + return sd_bus_message_append(reply, "b", b); +} + +static int property_get_scheduled_shutdown( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Manager *m = userdata; + int r; + + assert(bus); + assert(reply); + assert(m); + + r = sd_bus_message_open_container(reply, 'r', "st"); + if (r < 0) + return r; + + r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout); + if (r < 0) + return r; + + return sd_bus_message_close_container(reply); +} + +static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction); + +static int property_get_docked( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Manager *m = userdata; + + assert(bus); + assert(reply); + assert(m); + + return sd_bus_message_append(reply, "b", manager_is_docked_or_external_displays(m)); +} + +static int property_get_current_sessions( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Manager *m = userdata; + + assert(bus); + assert(reply); + assert(m); + + return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->sessions)); +} + +static int property_get_current_inhibitors( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Manager *m = userdata; + + assert(bus); + assert(reply); + assert(m); + + return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->inhibitors)); +} + +static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_free_ char *p = NULL; + Manager *m = userdata; + const char *name; + Session *session; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; + + p = session_bus_path(session); + if (!p) + return -ENOMEM; + + return sd_bus_reply_method_return(message, "o", p); +} + +static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_free_ char *p = NULL; + Session *session = NULL; + Manager *m = userdata; + pid_t pid; + int r; + + assert(message); + assert(m); + + assert_cc(sizeof(pid_t) == sizeof(uint32_t)); + + r = sd_bus_message_read(message, "u", &pid); + if (r < 0) + return r; + if (pid < 0) + return -EINVAL; + + if (pid == 0) { + r = manager_get_session_from_creds(m, message, NULL, error, &session); + if (r < 0) + return r; + } else { + r = manager_get_session_by_pid(m, pid, &session); + if (r < 0) + return r; + + if (!session) + return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid); + } + + p = session_bus_path(session); + if (!p) + return -ENOMEM; + + return sd_bus_reply_method_return(message, "o", p); +} + +static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_free_ char *p = NULL; + Manager *m = userdata; + uint32_t uid; + User *user; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "u", &uid); + if (r < 0) + return r; + + r = manager_get_user_from_creds(m, message, uid, error, &user); + if (r < 0) + return r; + + p = user_bus_path(user); + if (!p) + return -ENOMEM; + + return sd_bus_reply_method_return(message, "o", p); +} + +static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_free_ char *p = NULL; + Manager *m = userdata; + User *user = NULL; + pid_t pid; + int r; + + assert(message); + assert(m); + + assert_cc(sizeof(pid_t) == sizeof(uint32_t)); + + r = sd_bus_message_read(message, "u", &pid); + if (r < 0) + return r; + if (pid < 0) + return -EINVAL; + + if (pid == 0) { + r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user); + if (r < 0) + return r; + } else { + r = manager_get_user_by_pid(m, pid, &user); + if (r < 0) + return r; + if (!user) + return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "PID "PID_FMT" does not belong to any known or logged in user", pid); + } + + p = user_bus_path(user); + if (!p) + return -ENOMEM; + + return sd_bus_reply_method_return(message, "o", p); +} + +static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_free_ char *p = NULL; + Manager *m = userdata; + const char *name; + Seat *seat; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + r = manager_get_seat_from_creds(m, message, name, error, &seat); + if (r < 0) + return r; + + p = seat_bus_path(seat); + if (!p) + return -ENOMEM; + + return sd_bus_reply_method_return(message, "o", p); +} + +static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + Manager *m = userdata; + Session *session; + Iterator i; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_new_method_return(message, &reply); + if (r < 0) + return r; + + r = sd_bus_message_open_container(reply, 'a', "(susso)"); + if (r < 0) + return r; + + HASHMAP_FOREACH(session, m->sessions, i) { + _cleanup_free_ char *p = NULL; + + p = session_bus_path(session); + if (!p) + return -ENOMEM; + + r = sd_bus_message_append(reply, "(susso)", + session->id, + (uint32_t) session->user->uid, + session->user->name, + session->seat ? session->seat->id : "", + p); + if (r < 0) + return r; + } + + r = sd_bus_message_close_container(reply); + if (r < 0) + return r; + + return sd_bus_send(NULL, reply, NULL); +} + +static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + Manager *m = userdata; + User *user; + Iterator i; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_new_method_return(message, &reply); + if (r < 0) + return r; + + r = sd_bus_message_open_container(reply, 'a', "(uso)"); + if (r < 0) + return r; + + HASHMAP_FOREACH(user, m->users, i) { + _cleanup_free_ char *p = NULL; + + p = user_bus_path(user); + if (!p) + return -ENOMEM; + + r = sd_bus_message_append(reply, "(uso)", + (uint32_t) user->uid, + user->name, + p); + if (r < 0) + return r; + } + + r = sd_bus_message_close_container(reply); + if (r < 0) + return r; + + return sd_bus_send(NULL, reply, NULL); +} + +static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + Manager *m = userdata; + Seat *seat; + Iterator i; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_new_method_return(message, &reply); + if (r < 0) + return r; + + r = sd_bus_message_open_container(reply, 'a', "(so)"); + if (r < 0) + return r; + + HASHMAP_FOREACH(seat, m->seats, i) { + _cleanup_free_ char *p = NULL; + + p = seat_bus_path(seat); + if (!p) + return -ENOMEM; + + r = sd_bus_message_append(reply, "(so)", seat->id, p); + if (r < 0) + return r; + } + + r = sd_bus_message_close_container(reply); + if (r < 0) + return r; + + return sd_bus_send(NULL, reply, NULL); +} + +static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + Manager *m = userdata; + Inhibitor *inhibitor; + Iterator i; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_new_method_return(message, &reply); + if (r < 0) + return r; + + r = sd_bus_message_open_container(reply, 'a', "(ssssuu)"); + if (r < 0) + return r; + + HASHMAP_FOREACH(inhibitor, m->inhibitors, i) { + + r = sd_bus_message_append(reply, "(ssssuu)", + strempty(inhibit_what_to_string(inhibitor->what)), + strempty(inhibitor->who), + strempty(inhibitor->why), + strempty(inhibit_mode_to_string(inhibitor->mode)), + (uint32_t) inhibitor->uid, + (uint32_t) inhibitor->pid); + if (r < 0) + return r; + } + + r = sd_bus_message_close_container(reply); + if (r < 0) + return r; + + return sd_bus_send(NULL, reply, NULL); +} + +static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { + const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop; + uint32_t audit_id = 0; + _cleanup_free_ char *id = NULL; + Session *session = NULL; + Manager *m = userdata; + User *user = NULL; + Seat *seat = NULL; + pid_t leader; + uid_t uid; + int remote; + uint32_t vtnr = 0; + SessionType t; + SessionClass c; + int r; + + assert(message); + assert(m); + + assert_cc(sizeof(pid_t) == sizeof(uint32_t)); + assert_cc(sizeof(uid_t) == sizeof(uint32_t)); + + r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host); + if (r < 0) + return r; + + if (!uid_is_valid(uid)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID"); + if (leader < 0 || leader == 1) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID"); + + if (isempty(type)) + t = _SESSION_TYPE_INVALID; + else { + t = session_type_from_string(type); + if (t < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type); + } + + if (isempty(class)) + c = _SESSION_CLASS_INVALID; + else { + c = session_class_from_string(class); + if (c < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class); + } + + if (isempty(desktop)) + desktop = NULL; + else { + if (!string_is_safe(desktop)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop); + } + + if (isempty(cseat)) + seat = NULL; + else { + seat = hashmap_get(m->seats, cseat); + if (!seat) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat); + } + + if (tty_is_vc(tty)) { + int v; + + if (!seat) + seat = m->seat0; + else if (seat != m->seat0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TTY %s is virtual console but seat %s is not seat0", tty, seat->id); + + v = vtnr_from_tty(tty); + if (v <= 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty); + + if (!vtnr) + vtnr = (uint32_t) v; + else if (vtnr != (uint32_t) v) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match"); + + } else if (tty_is_console(tty)) { + + if (!seat) + seat = m->seat0; + else if (seat != m->seat0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0"); + + if (vtnr != 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0"); + } + + if (seat) { + if (seat_has_vts(seat)) { + if (!vtnr || vtnr > 63) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range"); + } else { + if (vtnr != 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0"); + } + } + + r = sd_bus_message_enter_container(message, 'a', "(sv)"); + if (r < 0) + return r; + + if (t == _SESSION_TYPE_INVALID) { + if (!isempty(display)) + t = SESSION_X11; + else if (!isempty(tty)) + t = SESSION_TTY; + else + t = SESSION_UNSPECIFIED; + } + + if (c == _SESSION_CLASS_INVALID) { + if (t == SESSION_UNSPECIFIED) + c = SESSION_BACKGROUND; + else + c = SESSION_USER; + } + + if (leader == 0) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_pid(creds, (pid_t*) &leader); + if (r < 0) + return r; + } + + r = manager_get_session_by_pid(m, leader, NULL); + if (r > 0) + return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session"); + + /* + * Old gdm and lightdm start the user-session on the same VT as + * the greeter session. But they destroy the greeter session + * after the user-session and want the user-session to take + * over the VT. We need to support this for + * backwards-compatibility, so make sure we allow new sessions + * on a VT that a greeter is running on. Furthermore, to allow + * re-logins, we have to allow a greeter to take over a used VT for + * the exact same reasons. + */ + if (c != SESSION_GREETER && + vtnr > 0 && + vtnr < m->seat0->position_count && + m->seat0->positions[vtnr] && + m->seat0->positions[vtnr]->class != SESSION_GREETER) + return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session"); + + if (hashmap_size(m->sessions) >= m->sessions_max) + return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max); + + audit_session_from_pid(leader, &audit_id); + if (audit_id > 0) { + /* Keep our session IDs and the audit session IDs in sync */ + + if (asprintf(&id, "%"PRIu32, audit_id) < 0) + return -ENOMEM; + + /* Wut? There's already a session by this name and we + * didn't find it above? Weird, then let's not trust + * the audit data and let's better register a new + * ID */ + if (hashmap_get(m->sessions, id)) { + log_warning("Existing logind session ID %s used by new audit session, ignoring", id); + audit_id = 0; + + id = mfree(id); + } + } + + if (!id) { + do { + id = mfree(id); + + if (asprintf(&id, "c%lu", ++m->session_counter) < 0) + return -ENOMEM; + + } while (hashmap_get(m->sessions, id)); + } + + r = manager_add_user_by_uid(m, uid, &user); + if (r < 0) + goto fail; + + r = manager_add_session(m, id, &session); + if (r < 0) + goto fail; + + session_set_user(session, user); + + session->leader = leader; + session->audit_id = audit_id; + session->type = t; + session->class = c; + session->remote = remote; + session->vtnr = vtnr; + + if (!isempty(tty)) { + session->tty = strdup(tty); + if (!session->tty) { + r = -ENOMEM; + goto fail; + } + } + + if (!isempty(display)) { + session->display = strdup(display); + if (!session->display) { + r = -ENOMEM; + goto fail; + } + } + + if (!isempty(remote_user)) { + session->remote_user = strdup(remote_user); + if (!session->remote_user) { + r = -ENOMEM; + goto fail; + } + } + + if (!isempty(remote_host)) { + session->remote_host = strdup(remote_host); + if (!session->remote_host) { + r = -ENOMEM; + goto fail; + } + } + + if (!isempty(service)) { + session->service = strdup(service); + if (!session->service) { + r = -ENOMEM; + goto fail; + } + } + + if (!isempty(desktop)) { + session->desktop = strdup(desktop); + if (!session->desktop) { + r = -ENOMEM; + goto fail; + } + } + + if (seat) { + r = seat_attach_session(seat, session); + if (r < 0) + goto fail; + } + + r = session_start(session); + if (r < 0) + goto fail; + + session->create_message = sd_bus_message_ref(message); + + /* Now, let's wait until the slice unit and stuff got + * created. We send the reply back from + * session_send_create_reply(). */ + + return 1; + +fail: + if (session) + session_add_to_gc_queue(session); + + if (user) + user_add_to_gc_queue(user); + + return r; +} + +static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + Session *session; + const char *name; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; + + r = session_release(session); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + Session *session; + const char *name; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; + + return bus_session_method_activate(message, session, error); +} + +static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) { + const char *session_name, *seat_name; + Manager *m = userdata; + Session *session; + Seat *seat; + int r; + + assert(message); + assert(m); + + /* Same as ActivateSession() but refuses to work if + * the seat doesn't match */ + + r = sd_bus_message_read(message, "ss", &session_name, &seat_name); + if (r < 0) + return r; + + r = manager_get_session_from_creds(m, message, session_name, error, &session); + if (r < 0) + return r; + + r = manager_get_seat_from_creds(m, message, seat_name, error, &seat); + if (r < 0) + return r; + + if (session->seat != seat) + return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name); + + r = session_activate(session); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + Session *session; + const char *name; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; + + return bus_session_method_lock(message, session, error); +} + +static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + int r; + + assert(message); + assert(m); + + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.lock-sessions", + NULL, + false, + UID_INVALID, + &m->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions")); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { + const char *name; + Manager *m = userdata; + Session *session; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; + + return bus_session_method_kill(message, session, error); +} + +static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + uint32_t uid; + User *user; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "u", &uid); + if (r < 0) + return r; + + r = manager_get_user_from_creds(m, message, uid, error, &user); + if (r < 0) + return r; + + return bus_user_method_kill(message, user, error); +} + +static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + const char *name; + Session *session; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + r = manager_get_session_from_creds(m, message, name, error, &session); + if (r < 0) + return r; + + return bus_session_method_terminate(message, session, error); +} + +static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + uint32_t uid; + User *user; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "u", &uid); + if (r < 0) + return r; + + r = manager_get_user_from_creds(m, message, uid, error, &user); + if (r < 0) + return r; + + return bus_user_method_terminate(message, user, error); +} + +static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + const char *name; + Seat *seat; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + r = manager_get_seat_from_creds(m, message, name, error, &seat); + if (r < 0) + return r; + + return bus_seat_method_terminate(message, seat, error); +} + +static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_free_ char *cc = NULL; + Manager *m = userdata; + int r, b, interactive; + struct passwd *pw; + const char *path; + uint32_t uid; + bool self = false; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive); + if (r < 0) + return r; + + if (uid == UID_INVALID) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + + /* Note that we get the owner UID of the session, not the actual client UID here! */ + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_owner_uid(creds, &uid); + if (r < 0) + return r; + + self = true; + + } else if (!uid_is_valid(uid)) + return -EINVAL; + + errno = 0; + pw = getpwuid(uid); + if (!pw) + return errno > 0 ? -errno : -ENOENT; + + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger", + NULL, + interactive, + UID_INVALID, + &m->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + mkdir_p_label("/var/lib/systemd", 0755); + + r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0); + if (r < 0) + return r; + + cc = cescape(pw->pw_name); + if (!cc) + return -ENOMEM; + + path = strjoina("/var/lib/systemd/linger/", cc); + if (b) { + User *u; + + r = touch(path); + if (r < 0) + return r; + + if (manager_add_user_by_uid(m, uid, &u) >= 0) + user_start(u); + + } else { + User *u; + + r = unlink(path); + if (r < 0 && errno != ENOENT) + return -errno; + + u = hashmap_get(m->users, UID_TO_PTR(uid)); + if (u) + user_add_to_gc_queue(u); + } + + return sd_bus_reply_method_return(message, NULL); +} + +static int trigger_device(Manager *m, struct udev_device *d) { + _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; + struct udev_list_entry *first, *item; + int r; + + assert(m); + + e = udev_enumerate_new(m->udev); + if (!e) + return -ENOMEM; + + if (d) { + r = udev_enumerate_add_match_parent(e, d); + if (r < 0) + return r; + } + + r = udev_enumerate_scan_devices(e); + if (r < 0) + return r; + + first = udev_enumerate_get_list_entry(e); + udev_list_entry_foreach(item, first) { + _cleanup_free_ char *t = NULL; + const char *p; + + p = udev_list_entry_get_name(item); + + t = strappend(p, "/uevent"); + if (!t) + return -ENOMEM; + + write_string_file(t, "change", WRITE_STRING_FILE_CREATE); + } + + return 0; +} + +static int attach_device(Manager *m, const char *seat, const char *sysfs) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + _cleanup_free_ char *rule = NULL, *file = NULL; + const char *id_for_seat; + int r; + + assert(m); + assert(seat); + assert(sysfs); + + d = udev_device_new_from_syspath(m->udev, sysfs); + if (!d) + return -ENODEV; + + if (!udev_device_has_tag(d, "seat")) + return -ENODEV; + + id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT"); + if (!id_for_seat) + return -ENODEV; + + if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0) + return -ENOMEM; + + if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0) + return -ENOMEM; + + mkdir_p_label("/etc/udev/rules.d", 0755); + r = write_string_file_atomic_label(file, rule); + if (r < 0) + return r; + + return trigger_device(m, d); +} + +static int flush_devices(Manager *m) { + _cleanup_closedir_ DIR *d; + + assert(m); + + d = opendir("/etc/udev/rules.d"); + if (!d) { + if (errno != ENOENT) + log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m"); + } else { + struct dirent *de; + + while ((de = readdir(d))) { + + if (!dirent_is_file(de)) + continue; + + if (!startswith(de->d_name, "72-seat-")) + continue; + + if (!endswith(de->d_name, ".rules")) + continue; + + if (unlinkat(dirfd(d), de->d_name, 0) < 0) + log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name); + } + } + + return trigger_device(m, NULL); +} + +static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { + const char *sysfs, *seat; + Manager *m = userdata; + int interactive, r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive); + if (r < 0) + return r; + + if (!path_startswith(sysfs, "/sys")) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs); + + if (!seat_name_is_valid(seat)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat); + + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.attach-device", + NULL, + interactive, + UID_INVALID, + &m->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = attach_device(m, seat, sysfs); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + int interactive, r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "b", &interactive); + if (r < 0) + return r; + + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.flush-devices", + NULL, + interactive, + UID_INVALID, + &m->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = flush_devices(m); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int have_multiple_sessions( + Manager *m, + uid_t uid) { + + Session *session; + Iterator i; + + assert(m); + + /* Check for other users' sessions. Greeter sessions do not + * count, and non-login sessions do not count either. */ + HASHMAP_FOREACH(session, m->sessions, i) + if (session->class == SESSION_USER && + session->user->uid != uid) + return true; + + return false; +} + +static int bus_manager_log_shutdown( + Manager *m, + InhibitWhat w, + const char *unit_name) { + + const char *p, *q; + + assert(m); + assert(unit_name); + + if (w != INHIBIT_SHUTDOWN) + return 0; + + if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) { + p = "MESSAGE=System is powering down"; + q = "SHUTDOWN=power-off"; + } else if (streq(unit_name, SPECIAL_HALT_TARGET)) { + p = "MESSAGE=System is halting"; + q = "SHUTDOWN=halt"; + } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) { + p = "MESSAGE=System is rebooting"; + q = "SHUTDOWN=reboot"; + } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) { + p = "MESSAGE=System is rebooting with kexec"; + q = "SHUTDOWN=kexec"; + } else { + p = "MESSAGE=System is shutting down"; + q = NULL; + } + + if (isempty(m->wall_message)) + p = strjoina(p, "."); + else + p = strjoina(p, " (", m->wall_message, ")."); + + return log_struct(LOG_NOTICE, + LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN), + p, + q, + NULL); +} + +static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) { + Manager *m = userdata; + + assert(e); + assert(m); + + m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source); + return 0; +} + +int manager_set_lid_switch_ignore(Manager *m, usec_t until) { + int r; + + assert(m); + + if (until <= now(CLOCK_MONOTONIC)) + return 0; + + /* We want to ignore the lid switch for a while after each + * suspend, and after boot-up. Hence let's install a timer for + * this. As long as the event source exists we ignore the lid + * switch. */ + + if (m->lid_switch_ignore_event_source) { + usec_t u; + + r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u); + if (r < 0) + return r; + + if (until <= u) + return 0; + + r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until); + } else + r = sd_event_add_time( + m->event, + &m->lid_switch_ignore_event_source, + CLOCK_MONOTONIC, + until, 0, + lid_switch_ignore_handler, m); + + return r; +} + +static void reset_scheduled_shutdown(Manager *m) { + m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source); + m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source); + m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source); + m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type); + m->scheduled_shutdown_timeout = 0; + m->shutdown_dry_run = false; + + if (m->unlink_nologin) { + (void) unlink("/run/nologin"); + m->unlink_nologin = false; + } +} + +static int execute_shutdown_or_sleep( + Manager *m, + InhibitWhat w, + const char *unit_name, + sd_bus_error *error) { + + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + char *c = NULL; + const char *p; + int r; + + assert(m); + assert(w >= 0); + assert(w < _INHIBIT_WHAT_MAX); + assert(unit_name); + + bus_manager_log_shutdown(m, w, unit_name); + + if (m->shutdown_dry_run) { + log_info("Running in dry run, suppressing action."); + reset_scheduled_shutdown(m); + } else { + r = sd_bus_call_method( + m->bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "StartUnit", + error, + &reply, + "ss", unit_name, "replace-irreversibly"); + if (r < 0) + return r; + + r = sd_bus_message_read(reply, "o", &p); + if (r < 0) + return r; + + c = strdup(p); + if (!c) + return -ENOMEM; + } + + m->action_unit = unit_name; + free(m->action_job); + m->action_job = c; + m->action_what = w; + + /* Make sure the lid switch is ignored for a while */ + manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec); + + return 0; +} + +int manager_dispatch_delayed(Manager *manager, bool timeout) { + + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + Inhibitor *offending = NULL; + int r; + + assert(manager); + + if (manager->action_what == 0 || manager->action_job) + return 0; + + if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) { + _cleanup_free_ char *comm = NULL, *u = NULL; + + if (!timeout) + return 0; + + (void) get_process_comm(offending->pid, &comm); + u = uid_to_name(offending->uid); + + log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.", + offending->uid, strna(u), + offending->pid, strna(comm)); + } + + /* Actually do the operation */ + r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error); + if (r < 0) { + log_warning("Failed to send delayed message: %s", bus_error_message(&error, r)); + + manager->action_unit = NULL; + manager->action_what = 0; + return r; + } + + return 1; +} + +static int manager_inhibit_timeout_handler( + sd_event_source *s, + uint64_t usec, + void *userdata) { + + Manager *manager = userdata; + int r; + + assert(manager); + assert(manager->inhibit_timeout_source == s); + + r = manager_dispatch_delayed(manager, true); + return (r < 0) ? r : 0; +} + +static int delay_shutdown_or_sleep( + Manager *m, + InhibitWhat w, + const char *unit_name) { + + int r; + usec_t timeout_val; + + assert(m); + assert(w >= 0); + assert(w < _INHIBIT_WHAT_MAX); + assert(unit_name); + + timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max; + + if (m->inhibit_timeout_source) { + r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_time() failed: %m"); + + r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_enabled() failed: %m"); + } else { + r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC, + timeout_val, 0, manager_inhibit_timeout_handler, m); + if (r < 0) + return r; + } + + m->action_unit = unit_name; + m->action_what = w; + + return 0; +} + +static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) { + + static const char * const signal_name[_INHIBIT_WHAT_MAX] = { + [INHIBIT_SHUTDOWN] = "PrepareForShutdown", + [INHIBIT_SLEEP] = "PrepareForSleep" + }; + + int active = _active; + + assert(m); + assert(w >= 0); + assert(w < _INHIBIT_WHAT_MAX); + assert(signal_name[w]); + + return sd_bus_emit_signal(m->bus, + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + signal_name[w], + "b", + active); +} + +int bus_manager_shutdown_or_sleep_now_or_later( + Manager *m, + const char *unit_name, + InhibitWhat w, + sd_bus_error *error) { + + bool delayed; + int r; + + assert(m); + assert(unit_name); + assert(w >= 0); + assert(w <= _INHIBIT_WHAT_MAX); + assert(!m->action_job); + + /* Tell everybody to prepare for shutdown/sleep */ + send_prepare_for(m, w, true); + + delayed = + m->inhibit_delay_max > 0 && + manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL); + + if (delayed) + /* Shutdown is delayed, keep in mind what we + * want to do, and start a timeout */ + r = delay_shutdown_or_sleep(m, w, unit_name); + else + /* Shutdown is not delayed, execute it + * immediately */ + r = execute_shutdown_or_sleep(m, w, unit_name, error); + + return r; +} + +static int verify_shutdown_creds( + Manager *m, + sd_bus_message *message, + InhibitWhat w, + bool interactive, + const char *action, + const char *action_multiple_sessions, + const char *action_ignore_inhibit, + sd_bus_error *error) { + + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + bool multiple_sessions, blocked; + uid_t uid; + int r; + + assert(m); + assert(message); + assert(w >= 0); + assert(w <= _INHIBIT_WHAT_MAX); + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_euid(creds, &uid); + if (r < 0) + return r; + + r = have_multiple_sessions(m, uid); + if (r < 0) + return r; + + multiple_sessions = r > 0; + blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL); + + if (multiple_sessions && action_multiple_sessions) { + r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + } + + if (blocked && action_ignore_inhibit) { + r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + } + + if (!multiple_sessions && !blocked && action) { + r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + } + + return 0; +} + +static int method_do_shutdown_or_sleep( + Manager *m, + sd_bus_message *message, + const char *unit_name, + InhibitWhat w, + const char *action, + const char *action_multiple_sessions, + const char *action_ignore_inhibit, + const char *sleep_verb, + sd_bus_error *error) { + + int interactive, r; + + assert(m); + assert(message); + assert(unit_name); + assert(w >= 0); + assert(w <= _INHIBIT_WHAT_MAX); + + r = sd_bus_message_read(message, "b", &interactive); + if (r < 0) + return r; + + /* Don't allow multiple jobs being executed at the same time */ + if (m->action_what) + return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress"); + + if (sleep_verb) { + r = can_sleep(sleep_verb); + if (r < 0) + return r; + + if (r == 0) + return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported"); + } + + r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions, + action_ignore_inhibit, error); + if (r != 0) + return r; + + r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_do_shutdown_or_sleep( + m, message, + SPECIAL_POWEROFF_TARGET, + INHIBIT_SHUTDOWN, + "org.freedesktop.login1.power-off", + "org.freedesktop.login1.power-off-multiple-sessions", + "org.freedesktop.login1.power-off-ignore-inhibit", + NULL, + error); +} + +static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_do_shutdown_or_sleep( + m, message, + SPECIAL_REBOOT_TARGET, + INHIBIT_SHUTDOWN, + "org.freedesktop.login1.reboot", + "org.freedesktop.login1.reboot-multiple-sessions", + "org.freedesktop.login1.reboot-ignore-inhibit", + NULL, + error); +} + +static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_do_shutdown_or_sleep( + m, message, + SPECIAL_SUSPEND_TARGET, + INHIBIT_SLEEP, + "org.freedesktop.login1.suspend", + "org.freedesktop.login1.suspend-multiple-sessions", + "org.freedesktop.login1.suspend-ignore-inhibit", + "suspend", + error); +} + +static int nologin_timeout_handler( + sd_event_source *s, + uint64_t usec, + void *userdata) { + + Manager *m = userdata; + int r; + + log_info("Creating /run/nologin, blocking further logins..."); + + r = write_string_file_atomic_label("/run/nologin", "System is going down."); + if (r < 0) + log_error_errno(r, "Failed to create /run/nologin: %m"); + else + m->unlink_nologin = true; + + return 0; +} + +static int update_schedule_file(Manager *m) { + _cleanup_free_ char *temp_path = NULL; + _cleanup_fclose_ FILE *f = NULL; + int r; + + assert(m); + + r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0); + if (r < 0) + return log_error_errno(r, "Failed to create shutdown subdirectory: %m"); + + r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path); + if (r < 0) + return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m"); + + (void) fchmod(fileno(f), 0644); + + fprintf(f, + "USEC="USEC_FMT"\n" + "WARN_WALL=%i\n" + "MODE=%s\n", + m->scheduled_shutdown_timeout, + m->enable_wall_messages, + m->scheduled_shutdown_type); + + if (!isempty(m->wall_message)) { + _cleanup_free_ char *t; + + t = cescape(m->wall_message); + if (!t) { + r = -ENOMEM; + goto fail; + } + + fprintf(f, "WALL_MESSAGE=%s\n", t); + } + + r = fflush_and_check(f); + if (r < 0) + goto fail; + + if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) { + r = -errno; + goto fail; + } + + return 0; + +fail: + (void) unlink(temp_path); + (void) unlink("/run/systemd/shutdown/scheduled"); + + return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m"); +} + +static int manager_scheduled_shutdown_handler( + sd_event_source *s, + uint64_t usec, + void *userdata) { + + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + Manager *m = userdata; + const char *target; + int r; + + assert(m); + + if (isempty(m->scheduled_shutdown_type)) + return 0; + + if (streq(m->scheduled_shutdown_type, "halt")) + target = SPECIAL_HALT_TARGET; + else if (streq(m->scheduled_shutdown_type, "poweroff")) + target = SPECIAL_POWEROFF_TARGET; + else + target = SPECIAL_REBOOT_TARGET; + + r = execute_shutdown_or_sleep(m, 0, target, &error); + if (r < 0) + return log_error_errno(r, "Unable to execute transition to %s: %m", target); + + return 0; +} + +static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + const char *action_multiple_sessions = NULL; + const char *action_ignore_inhibit = NULL; + const char *action = NULL; + uint64_t elapse; + char *type; + int r; + + assert(m); + assert(message); + + r = sd_bus_message_read(message, "st", &type, &elapse); + if (r < 0) + return r; + + if (startswith(type, "dry-")) { + type += 4; + m->shutdown_dry_run = true; + } + + if (streq(type, "reboot")) { + action = "org.freedesktop.login1.reboot"; + action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions"; + action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit"; + } else if (streq(type, "halt")) { + action = "org.freedesktop.login1.halt"; + action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions"; + action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit"; + } else if (streq(type, "poweroff")) { + action = "org.freedesktop.login1.power-off"; + action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions"; + action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit"; + } else + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type"); + + r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false, + action, action_multiple_sessions, action_ignore_inhibit, error); + if (r != 0) + return r; + + if (m->scheduled_shutdown_timeout_source) { + r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_time() failed: %m"); + + r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_enabled() failed: %m"); + } else { + r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source, + CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m); + if (r < 0) + return log_error_errno(r, "sd_event_add_time() failed: %m"); + } + + r = free_and_strdup(&m->scheduled_shutdown_type, type); + if (r < 0) { + m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source); + return log_oom(); + } + + if (m->nologin_timeout_source) { + r = sd_event_source_set_time(m->nologin_timeout_source, elapse); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_time() failed: %m"); + + r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_enabled() failed: %m"); + } else { + r = sd_event_add_time(m->event, &m->nologin_timeout_source, + CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m); + if (r < 0) + return log_error_errno(r, "sd_event_add_time() failed: %m"); + } + + m->scheduled_shutdown_timeout = elapse; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds); + if (r >= 0) { + const char *tty = NULL; + + (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid); + (void) sd_bus_creds_get_tty(creds, &tty); + + r = free_and_strdup(&m->scheduled_shutdown_tty, tty); + if (r < 0) { + m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source); + return log_oom(); + } + } + + r = manager_setup_wall_message_timer(m); + if (r < 0) + return r; + + if (!isempty(type)) { + r = update_schedule_file(m); + if (r < 0) + return r; + } else + (void) unlink("/run/systemd/shutdown/scheduled"); + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + bool cancelled; + + assert(m); + assert(message); + + cancelled = m->scheduled_shutdown_type != NULL; + reset_scheduled_shutdown(m); + + if (cancelled) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + const char *tty = NULL; + uid_t uid = 0; + int r; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds); + if (r >= 0) { + (void) sd_bus_creds_get_uid(creds, &uid); + (void) sd_bus_creds_get_tty(creds, &tty); + } + + utmp_wall("The system shutdown has been cancelled", + uid_to_name(uid), tty, logind_wall_tty_filter, m); + } + + return sd_bus_reply_method_return(message, "b", cancelled); +} + +static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_do_shutdown_or_sleep( + m, message, + SPECIAL_HIBERNATE_TARGET, + INHIBIT_SLEEP, + "org.freedesktop.login1.hibernate", + "org.freedesktop.login1.hibernate-multiple-sessions", + "org.freedesktop.login1.hibernate-ignore-inhibit", + "hibernate", + error); +} + +static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_do_shutdown_or_sleep( + m, message, + SPECIAL_HYBRID_SLEEP_TARGET, + INHIBIT_SLEEP, + "org.freedesktop.login1.hibernate", + "org.freedesktop.login1.hibernate-multiple-sessions", + "org.freedesktop.login1.hibernate-ignore-inhibit", + "hybrid-sleep", + error); +} + +static int method_can_shutdown_or_sleep( + Manager *m, + sd_bus_message *message, + InhibitWhat w, + const char *action, + const char *action_multiple_sessions, + const char *action_ignore_inhibit, + const char *sleep_verb, + sd_bus_error *error) { + + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + bool multiple_sessions, challenge, blocked; + const char *result = NULL; + uid_t uid; + int r; + + assert(m); + assert(message); + assert(w >= 0); + assert(w <= _INHIBIT_WHAT_MAX); + assert(action); + assert(action_multiple_sessions); + assert(action_ignore_inhibit); + + if (sleep_verb) { + r = can_sleep(sleep_verb); + if (r < 0) + return r; + if (r == 0) + return sd_bus_reply_method_return(message, "s", "na"); + } + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_euid(creds, &uid); + if (r < 0) + return r; + + r = have_multiple_sessions(m, uid); + if (r < 0) + return r; + + multiple_sessions = r > 0; + blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL); + + if (multiple_sessions) { + r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error); + if (r < 0) + return r; + + if (r > 0) + result = "yes"; + else if (challenge) + result = "challenge"; + else + result = "no"; + } + + if (blocked) { + r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error); + if (r < 0) + return r; + + if (r > 0 && !result) + result = "yes"; + else if (challenge && (!result || streq(result, "yes"))) + result = "challenge"; + else + result = "no"; + } + + if (!multiple_sessions && !blocked) { + /* If neither inhibit nor multiple sessions + * apply then just check the normal policy */ + + r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error); + if (r < 0) + return r; + + if (r > 0) + result = "yes"; + else if (challenge) + result = "challenge"; + else + result = "no"; + } + + return sd_bus_reply_method_return(message, "s", result); +} + +static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_can_shutdown_or_sleep( + m, message, + INHIBIT_SHUTDOWN, + "org.freedesktop.login1.power-off", + "org.freedesktop.login1.power-off-multiple-sessions", + "org.freedesktop.login1.power-off-ignore-inhibit", + NULL, + error); +} + +static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_can_shutdown_or_sleep( + m, message, + INHIBIT_SHUTDOWN, + "org.freedesktop.login1.reboot", + "org.freedesktop.login1.reboot-multiple-sessions", + "org.freedesktop.login1.reboot-ignore-inhibit", + NULL, + error); +} + +static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_can_shutdown_or_sleep( + m, message, + INHIBIT_SLEEP, + "org.freedesktop.login1.suspend", + "org.freedesktop.login1.suspend-multiple-sessions", + "org.freedesktop.login1.suspend-ignore-inhibit", + "suspend", + error); +} + +static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_can_shutdown_or_sleep( + m, message, + INHIBIT_SLEEP, + "org.freedesktop.login1.hibernate", + "org.freedesktop.login1.hibernate-multiple-sessions", + "org.freedesktop.login1.hibernate-ignore-inhibit", + "hibernate", + error); +} + +static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + + return method_can_shutdown_or_sleep( + m, message, + INHIBIT_SLEEP, + "org.freedesktop.login1.hibernate", + "org.freedesktop.login1.hibernate-multiple-sessions", + "org.freedesktop.login1.hibernate-ignore-inhibit", + "hybrid-sleep", + error); +} + +static int property_get_reboot_to_firmware_setup( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + int r; + + assert(bus); + assert(reply); + assert(userdata); + + r = efi_get_reboot_to_firmware(); + if (r < 0 && r != -EOPNOTSUPP) + return r; + + return sd_bus_message_append(reply, "b", r > 0); +} + +static int method_set_reboot_to_firmware_setup( + sd_bus_message *message, + void *userdata, + sd_bus_error *error) { + + int b, r; + Manager *m = userdata; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "b", &b); + if (r < 0) + return r; + + r = bus_verify_polkit_async(message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.set-reboot-to-firmware-setup", + NULL, + false, + UID_INVALID, + &m->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = efi_set_reboot_to_firmware(b); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_can_reboot_to_firmware_setup( + sd_bus_message *message, + void *userdata, + sd_bus_error *error) { + + int r; + bool challenge; + const char *result; + Manager *m = userdata; + + assert(message); + assert(m); + + r = efi_reboot_to_firmware_supported(); + if (r == -EOPNOTSUPP) + return sd_bus_reply_method_return(message, "s", "na"); + else if (r < 0) + return r; + + r = bus_test_polkit(message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.set-reboot-to-firmware-setup", + NULL, + UID_INVALID, + &challenge, + error); + if (r < 0) + return r; + + if (r > 0) + result = "yes"; + else if (challenge) + result = "challenge"; + else + result = "no"; + + return sd_bus_reply_method_return(message, "s", result); +} + +static int method_set_wall_message( + sd_bus_message *message, + void *userdata, + sd_bus_error *error) { + + int r; + Manager *m = userdata; + char *wall_message; + int enable_wall_messages; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages); + if (r < 0) + return r; + + r = bus_verify_polkit_async(message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.set-wall-message", + NULL, + false, + UID_INVALID, + &m->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + if (isempty(wall_message)) + m->wall_message = mfree(m->wall_message); + else { + r = free_and_strdup(&m->wall_message, wall_message); + if (r < 0) + return log_oom(); + } + + m->enable_wall_messages = enable_wall_messages; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + const char *who, *why, *what, *mode; + _cleanup_free_ char *id = NULL; + _cleanup_close_ int fifo_fd = -1; + Manager *m = userdata; + Inhibitor *i = NULL; + InhibitMode mm; + InhibitWhat w; + pid_t pid; + uid_t uid; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode); + if (r < 0) + return r; + + w = inhibit_what_from_string(what); + if (w <= 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what); + + mm = inhibit_mode_from_string(mode); + if (mm < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode); + + /* Delay is only supported for shutdown/sleep */ + if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP))) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep"); + + /* Don't allow taking delay locks while we are already + * executing the operation. We shouldn't create the impression + * that the lock was successful if the machine is about to go + * down/suspend any moment. */ + if (m->action_what & w) + return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running"); + + r = bus_verify_polkit_async( + message, + CAP_SYS_BOOT, + w == INHIBIT_SHUTDOWN ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") : + w == INHIBIT_SLEEP ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep" : "org.freedesktop.login1.inhibit-delay-sleep") : + w == INHIBIT_IDLE ? "org.freedesktop.login1.inhibit-block-idle" : + w == INHIBIT_HANDLE_POWER_KEY ? "org.freedesktop.login1.inhibit-handle-power-key" : + w == INHIBIT_HANDLE_SUSPEND_KEY ? "org.freedesktop.login1.inhibit-handle-suspend-key" : + w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" : + "org.freedesktop.login1.inhibit-handle-lid-switch", + NULL, + false, + UID_INVALID, + &m->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_euid(creds, &uid); + if (r < 0) + return r; + + r = sd_bus_creds_get_pid(creds, &pid); + if (r < 0) + return r; + + if (hashmap_size(m->inhibitors) >= m->inhibitors_max) + return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max); + + do { + id = mfree(id); + + if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0) + return -ENOMEM; + + } while (hashmap_get(m->inhibitors, id)); + + r = manager_add_inhibitor(m, id, &i); + if (r < 0) + return r; + + i->what = w; + i->mode = mm; + i->pid = pid; + i->uid = uid; + i->why = strdup(why); + i->who = strdup(who); + + if (!i->why || !i->who) { + r = -ENOMEM; + goto fail; + } + + fifo_fd = inhibitor_create_fifo(i); + if (fifo_fd < 0) { + r = fifo_fd; + goto fail; + } + + inhibitor_start(i); + + return sd_bus_reply_method_return(message, "h", fifo_fd); + +fail: + if (i) + inhibitor_free(i); + + return r; +} + +const sd_bus_vtable manager_vtable[] = { + SD_BUS_VTABLE_START(0), + + SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0), + SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0), + + SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0), + SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0), + SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0), + SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0), + SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0), + SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0), + SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST), + + SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0), + SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0), + SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED), + + SD_BUS_SIGNAL("SessionNew", "so", 0), + SD_BUS_SIGNAL("SessionRemoved", "so", 0), + SD_BUS_SIGNAL("UserNew", "uo", 0), + SD_BUS_SIGNAL("UserRemoved", "uo", 0), + SD_BUS_SIGNAL("SeatNew", "so", 0), + SD_BUS_SIGNAL("SeatRemoved", "so", 0), + SD_BUS_SIGNAL("PrepareForShutdown", "b", 0), + SD_BUS_SIGNAL("PrepareForSleep", "b", 0), + + SD_BUS_VTABLE_END +}; + +static int session_jobs_reply(Session *s, const char *unit, const char *result) { + int r = 0; + + assert(s); + assert(unit); + + if (!s->started) + return r; + + if (streq(result, "done")) + r = session_send_create_reply(s, NULL); + else { + _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL; + + sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result); + r = session_send_create_reply(s, &e); + } + + return r; +} + +int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) { + const char *path, *result, *unit; + Manager *m = userdata; + Session *session; + uint32_t id; + User *user; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result); + if (r < 0) { + bus_log_parse_error(r); + return 0; + } + + if (m->action_job && streq(m->action_job, path)) { + log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what)); + + /* Tell people that they now may take a lock again */ + send_prepare_for(m, m->action_what, false); + + m->action_job = mfree(m->action_job); + m->action_unit = NULL; + m->action_what = 0; + return 0; + } + + session = hashmap_get(m->session_units, unit); + if (session && streq_ptr(path, session->scope_job)) { + session->scope_job = mfree(session->scope_job); + session_jobs_reply(session, unit, result); + + session_save(session); + user_save(session->user); + session_add_to_gc_queue(session); + } + + user = hashmap_get(m->user_units, unit); + if (user && + (streq_ptr(path, user->service_job) || + streq_ptr(path, user->slice_job))) { + + if (streq_ptr(path, user->service_job)) + user->service_job = mfree(user->service_job); + + if (streq_ptr(path, user->slice_job)) + user->slice_job = mfree(user->slice_job); + + LIST_FOREACH(sessions_by_user, session, user->sessions) + session_jobs_reply(session, unit, result); + + user_save(user); + user_add_to_gc_queue(user); + } + + return 0; +} + +int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) { + const char *path, *unit; + Manager *m = userdata; + Session *session; + User *user; + int r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "so", &unit, &path); + if (r < 0) { + bus_log_parse_error(r); + return 0; + } + + session = hashmap_get(m->session_units, unit); + if (session) + session_add_to_gc_queue(session); + + user = hashmap_get(m->user_units, unit); + if (user) + user_add_to_gc_queue(user); + + return 0; +} + +int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_free_ char *unit = NULL; + Manager *m = userdata; + const char *path; + Session *session; + User *user; + int r; + + assert(message); + assert(m); + + path = sd_bus_message_get_path(message); + if (!path) + return 0; + + r = unit_name_from_dbus_path(path, &unit); + if (r == -EINVAL) /* not a unit */ + return 0; + if (r < 0) { + log_oom(); + return 0; + } + + session = hashmap_get(m->session_units, unit); + if (session) + session_add_to_gc_queue(session); + + user = hashmap_get(m->user_units, unit); + if (user) + user_add_to_gc_queue(user); + + return 0; +} + +int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Manager *m = userdata; + Session *session; + Iterator i; + int b, r; + + assert(message); + assert(m); + + r = sd_bus_message_read(message, "b", &b); + if (r < 0) { + bus_log_parse_error(r); + return 0; + } + + if (b) + return 0; + + /* systemd finished reloading, let's recheck all our sessions */ + log_debug("System manager has been reloaded, rechecking sessions..."); + + HASHMAP_FOREACH(session, m->sessions, i) + session_add_to_gc_queue(session); + + return 0; +} + +int manager_send_changed(Manager *manager, const char *property, ...) { + char **l; + + assert(manager); + + l = strv_from_stdarg_alloca(property); + + return sd_bus_emit_properties_changed_strv( + manager->bus, + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + l); +} + +static int strdup_job(sd_bus_message *reply, char **job) { + const char *j; + char *copy; + int r; + + r = sd_bus_message_read(reply, "o", &j); + if (r < 0) + return r; + + copy = strdup(j); + if (!copy) + return -ENOMEM; + + *job = copy; + return 1; +} + +int manager_start_slice( + Manager *manager, + const char *slice, + const char *description, + const char *after, + const char *after2, + uint64_t tasks_max, + sd_bus_error *error, + char **job) { + + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; + int r; + + assert(manager); + assert(slice); + assert(job); + + r = sd_bus_message_new_method_call( + manager->bus, + &m, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "StartTransientUnit"); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "ss", strempty(slice), "fail"); + if (r < 0) + return r; + + r = sd_bus_message_open_container(m, 'a', "(sv)"); + if (r < 0) + return r; + + if (!isempty(description)) { + r = sd_bus_message_append(m, "(sv)", "Description", "s", description); + if (r < 0) + return r; + } + + if (!isempty(after)) { + r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after); + if (r < 0) + return r; + } + + if (!isempty(after2)) { + r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2); + if (r < 0) + return r; + } + + r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max); + if (r < 0) + return r; + + r = sd_bus_message_close_container(m); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "a(sa(sv))", 0); + if (r < 0) + return r; + + r = sd_bus_call(manager->bus, m, 0, error, &reply); + if (r < 0) + return r; + + return strdup_job(reply, job); +} + +int manager_start_scope( + Manager *manager, + const char *scope, + pid_t pid, + const char *slice, + const char *description, + const char *after, + const char *after2, + uint64_t tasks_max, + sd_bus_error *error, + char **job) { + + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; + int r; + + assert(manager); + assert(scope); + assert(pid > 1); + assert(job); + + r = sd_bus_message_new_method_call( + manager->bus, + &m, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "StartTransientUnit"); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "ss", strempty(scope), "fail"); + if (r < 0) + return r; + + r = sd_bus_message_open_container(m, 'a', "(sv)"); + if (r < 0) + return r; + + if (!isempty(slice)) { + r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice); + if (r < 0) + return r; + } + + if (!isempty(description)) { + r = sd_bus_message_append(m, "(sv)", "Description", "s", description); + if (r < 0) + return r; + } + + if (!isempty(after)) { + r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after); + if (r < 0) + return r; + } + + if (!isempty(after2)) { + r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2); + if (r < 0) + return r; + } + + /* cgroup empty notification is not available in containers + * currently. To make this less problematic, let's shorten the + * stop timeout for sessions, so that we don't wait + * forever. */ + + /* Make sure that the session shells are terminated with + * SIGHUP since bash and friends tend to ignore SIGTERM */ + r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max); + if (r < 0) + return r; + + r = sd_bus_message_close_container(m); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "a(sa(sv))", 0); + if (r < 0) + return r; + + r = sd_bus_call(manager->bus, m, 0, error, &reply); + if (r < 0) + return r; + + return strdup_job(reply, job); +} + +int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + int r; + + assert(manager); + assert(unit); + assert(job); + + r = sd_bus_call_method( + manager->bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "StartUnit", + error, + &reply, + "ss", unit, "replace"); + if (r < 0) + return r; + + return strdup_job(reply, job); +} + +int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + int r; + + assert(manager); + assert(unit); + assert(job); + + r = sd_bus_call_method( + manager->bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "StopUnit", + error, + &reply, + "ss", unit, "fail"); + if (r < 0) { + if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) || + sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) { + + *job = NULL; + sd_bus_error_free(error); + return 0; + } + + return r; + } + + return strdup_job(reply, job); +} + +int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) { + _cleanup_free_ char *path = NULL; + int r; + + assert(manager); + assert(scope); + + path = unit_dbus_path_from_name(scope); + if (!path) + return -ENOMEM; + + r = sd_bus_call_method( + manager->bus, + "org.freedesktop.systemd1", + path, + "org.freedesktop.systemd1.Scope", + "Abandon", + error, + NULL, + NULL); + if (r < 0) { + if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) || + sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) || + sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) { + sd_bus_error_free(error); + return 0; + } + + return r; + } + + return 1; +} + +int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) { + assert(manager); + assert(unit); + + return sd_bus_call_method( + manager->bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "KillUnit", + error, + NULL, + "ssi", unit, who == KILL_LEADER ? "main" : "all", signo); +} + +int manager_unit_is_active(Manager *manager, const char *unit) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + _cleanup_free_ char *path = NULL; + const char *state; + int r; + + assert(manager); + assert(unit); + + path = unit_dbus_path_from_name(unit); + if (!path) + return -ENOMEM; + + r = sd_bus_get_property( + manager->bus, + "org.freedesktop.systemd1", + path, + "org.freedesktop.systemd1.Unit", + "ActiveState", + &error, + &reply, + "s"); + if (r < 0) { + /* systemd might have droppped off momentarily, let's + * not make this an error */ + if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) || + sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED)) + return true; + + /* If the unit is already unloaded then it's not + * active */ + if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) || + sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED)) + return false; + + return r; + } + + r = sd_bus_message_read(reply, "s", &state); + if (r < 0) + return -EINVAL; + + return !streq(state, "inactive") && !streq(state, "failed"); +} + +int manager_job_is_active(Manager *manager, const char *path) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + int r; + + assert(manager); + assert(path); + + r = sd_bus_get_property( + manager->bus, + "org.freedesktop.systemd1", + path, + "org.freedesktop.systemd1.Job", + "State", + &error, + &reply, + "s"); + if (r < 0) { + if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) || + sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED)) + return true; + + if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT)) + return false; + + return r; + } + + /* We don't actually care about the state really. The fact + * that we could read the job state is enough for us */ + + return true; +} diff --git a/src/grp-login/systemd-logind/logind-device.c b/src/grp-login/systemd-logind/logind-device.c new file mode 100644 index 0000000000..15ef1b10bb --- /dev/null +++ b/src/grp-login/systemd-logind/logind-device.c @@ -0,0 +1,122 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <string.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/util.h" + +#include "logind-device.h" + +Device* device_new(Manager *m, const char *sysfs, bool master) { + Device *d; + + assert(m); + assert(sysfs); + + d = new0(Device, 1); + if (!d) + return NULL; + + d->sysfs = strdup(sysfs); + if (!d->sysfs) + return mfree(d); + + if (hashmap_put(m->devices, d->sysfs, d) < 0) { + free(d->sysfs); + return mfree(d); + } + + d->manager = m; + d->master = master; + dual_timestamp_get(&d->timestamp); + + return d; +} + +static void device_detach(Device *d) { + Seat *s; + SessionDevice *sd; + + assert(d); + + if (!d->seat) + return; + + while ((sd = d->session_devices)) + session_device_free(sd); + + s = d->seat; + LIST_REMOVE(devices, d->seat->devices, d); + d->seat = NULL; + + if (!seat_has_master_device(s)) { + seat_add_to_gc_queue(s); + seat_send_changed(s, "CanGraphical", NULL); + } +} + +void device_free(Device *d) { + assert(d); + + device_detach(d); + + hashmap_remove(d->manager->devices, d->sysfs); + + free(d->sysfs); + free(d); +} + +void device_attach(Device *d, Seat *s) { + Device *i; + bool had_master; + + assert(d); + assert(s); + + if (d->seat == s) + return; + + if (d->seat) + device_detach(d); + + d->seat = s; + had_master = seat_has_master_device(s); + + /* We keep the device list sorted by the "master" flag. That is, master + * devices are at the front, other devices at the tail. As there is no + * way to easily add devices at the list-tail, we need to iterate the + * list to find the first non-master device when adding non-master + * devices. We assume there is only a few (normally 1) master devices + * per seat, so we iterate only a few times. */ + + if (d->master || !s->devices) + LIST_PREPEND(devices, s->devices, d); + else { + LIST_FOREACH(devices, i, s->devices) { + if (!i->devices_next || !i->master) { + LIST_INSERT_AFTER(devices, s->devices, i, d); + break; + } + } + } + + if (!had_master && d->master) + seat_send_changed(s, "CanGraphical", NULL); +} diff --git a/src/grp-login/systemd-logind/logind-device.h b/src/grp-login/systemd-logind/logind-device.h new file mode 100644 index 0000000000..11b9bfbecd --- /dev/null +++ b/src/grp-login/systemd-logind/logind-device.h @@ -0,0 +1,44 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "systemd-basic/list.h" + +typedef struct Device Device; + +#include "logind-seat.h" +#include "logind-session-device.h" + +struct Device { + Manager *manager; + + char *sysfs; + Seat *seat; + bool master; + + dual_timestamp timestamp; + + LIST_FIELDS(struct Device, devices); + LIST_HEAD(SessionDevice, session_devices); +}; + +Device* device_new(Manager *m, const char *sysfs, bool master); +void device_free(Device *d); +void device_attach(Device *d, Seat *s); diff --git a/src/grp-login/systemd-logind/logind-gperf.gperf b/src/grp-login/systemd-logind/logind-gperf.gperf new file mode 100644 index 0000000000..3dcde4cb8f --- /dev/null +++ b/src/grp-login/systemd-logind/logind-gperf.gperf @@ -0,0 +1,41 @@ +%{ +#include <stddef.h> + +#include "systemd-shared/conf-parser.h" + +#include "logind.h" +%} +struct ConfigPerfItem; +%null_strings +%language=ANSI-C +%define slot-name section_and_lvalue +%define hash-function-name logind_gperf_hash +%define lookup-function-name logind_gperf_lookup +%readonly-tables +%omit-struct-type +%struct-type +%includes +%% +Login.NAutoVTs, config_parse_unsigned, 0, offsetof(Manager, n_autovts) +Login.ReserveVT, config_parse_unsigned, 0, offsetof(Manager, reserve_vt) +Login.KillUserProcesses, config_parse_bool, 0, offsetof(Manager, kill_user_processes) +Login.KillOnlyUsers, config_parse_strv, 0, offsetof(Manager, kill_only_users) +Login.KillExcludeUsers, config_parse_strv, 0, offsetof(Manager, kill_exclude_users) +Login.InhibitDelayMaxSec, config_parse_sec, 0, offsetof(Manager, inhibit_delay_max) +Login.HandlePowerKey, config_parse_handle_action, 0, offsetof(Manager, handle_power_key) +Login.HandleSuspendKey, config_parse_handle_action, 0, offsetof(Manager, handle_suspend_key) +Login.HandleHibernateKey, config_parse_handle_action, 0, offsetof(Manager, handle_hibernate_key) +Login.HandleLidSwitch, config_parse_handle_action, 0, offsetof(Manager, handle_lid_switch) +Login.HandleLidSwitchDocked, config_parse_handle_action, 0, offsetof(Manager, handle_lid_switch_docked) +Login.PowerKeyIgnoreInhibited, config_parse_bool, 0, offsetof(Manager, power_key_ignore_inhibited) +Login.SuspendKeyIgnoreInhibited, config_parse_bool, 0, offsetof(Manager, suspend_key_ignore_inhibited) +Login.HibernateKeyIgnoreInhibited, config_parse_bool, 0, offsetof(Manager, hibernate_key_ignore_inhibited) +Login.LidSwitchIgnoreInhibited, config_parse_bool, 0, offsetof(Manager, lid_switch_ignore_inhibited) +Login.HoldoffTimeoutSec, config_parse_sec, 0, offsetof(Manager, holdoff_timeout_usec) +Login.IdleAction, config_parse_handle_action, 0, offsetof(Manager, idle_action) +Login.IdleActionSec, config_parse_sec, 0, offsetof(Manager, idle_action_usec) +Login.RuntimeDirectorySize, config_parse_tmpfs_size, 0, offsetof(Manager, runtime_dir_size) +Login.RemoveIPC, config_parse_bool, 0, offsetof(Manager, remove_ipc) +Login.InhibitorsMax, config_parse_uint64, 0, offsetof(Manager, inhibitors_max) +Login.SessionsMax, config_parse_uint64, 0, offsetof(Manager, sessions_max) +Login.UserTasksMax, config_parse_user_tasks_max,0, offsetof(Manager, user_tasks_max) diff --git a/src/grp-login/systemd-logind/logind-inhibit.c b/src/grp-login/systemd-logind/logind-inhibit.c new file mode 100644 index 0000000000..b416f395a1 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-inhibit.c @@ -0,0 +1,483 @@ +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/escape.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/mkdir.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/string-table.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/user-util.h" +#include "systemd-basic/util.h" + +#include "logind-inhibit.h" + +Inhibitor* inhibitor_new(Manager *m, const char* id) { + Inhibitor *i; + + assert(m); + + i = new0(Inhibitor, 1); + if (!i) + return NULL; + + i->state_file = strappend("/run/systemd/inhibit/", id); + if (!i->state_file) + return mfree(i); + + i->id = basename(i->state_file); + + if (hashmap_put(m->inhibitors, i->id, i) < 0) { + free(i->state_file); + return mfree(i); + } + + i->manager = m; + i->fifo_fd = -1; + + return i; +} + +void inhibitor_free(Inhibitor *i) { + assert(i); + + hashmap_remove(i->manager->inhibitors, i->id); + + inhibitor_remove_fifo(i); + + free(i->who); + free(i->why); + + if (i->state_file) { + unlink(i->state_file); + free(i->state_file); + } + + free(i); +} + +int inhibitor_save(Inhibitor *i) { + _cleanup_free_ char *temp_path = NULL; + _cleanup_fclose_ FILE *f = NULL; + int r; + + assert(i); + + r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0); + if (r < 0) + goto fail; + + r = fopen_temporary(i->state_file, &f, &temp_path); + if (r < 0) + goto fail; + + fchmod(fileno(f), 0644); + + fprintf(f, + "# This is private data. Do not parse.\n" + "WHAT=%s\n" + "MODE=%s\n" + "UID="UID_FMT"\n" + "PID="PID_FMT"\n", + inhibit_what_to_string(i->what), + inhibit_mode_to_string(i->mode), + i->uid, + i->pid); + + if (i->who) { + _cleanup_free_ char *cc = NULL; + + cc = cescape(i->who); + if (!cc) { + r = -ENOMEM; + goto fail; + } + + fprintf(f, "WHO=%s\n", cc); + } + + if (i->why) { + _cleanup_free_ char *cc = NULL; + + cc = cescape(i->why); + if (!cc) { + r = -ENOMEM; + goto fail; + } + + fprintf(f, "WHY=%s\n", cc); + } + + if (i->fifo_path) + fprintf(f, "FIFO=%s\n", i->fifo_path); + + r = fflush_and_check(f); + if (r < 0) + goto fail; + + if (rename(temp_path, i->state_file) < 0) { + r = -errno; + goto fail; + } + + return 0; + +fail: + (void) unlink(i->state_file); + + if (temp_path) + (void) unlink(temp_path); + + return log_error_errno(r, "Failed to save inhibit data %s: %m", i->state_file); +} + +int inhibitor_start(Inhibitor *i) { + assert(i); + + if (i->started) + return 0; + + dual_timestamp_get(&i->since); + + log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s started.", + strna(i->who), strna(i->why), + i->pid, i->uid, + inhibit_mode_to_string(i->mode)); + + inhibitor_save(i); + + i->started = true; + + manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL); + + return 0; +} + +int inhibitor_stop(Inhibitor *i) { + assert(i); + + if (i->started) + log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s stopped.", + strna(i->who), strna(i->why), + i->pid, i->uid, + inhibit_mode_to_string(i->mode)); + + if (i->state_file) + unlink(i->state_file); + + i->started = false; + + manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL); + + return 0; +} + +int inhibitor_load(Inhibitor *i) { + + _cleanup_free_ char + *what = NULL, + *uid = NULL, + *pid = NULL, + *who = NULL, + *why = NULL, + *mode = NULL; + + InhibitWhat w; + InhibitMode mm; + char *cc; + int r; + + r = parse_env_file(i->state_file, NEWLINE, + "WHAT", &what, + "UID", &uid, + "PID", &pid, + "WHO", &who, + "WHY", &why, + "MODE", &mode, + "FIFO", &i->fifo_path, + NULL); + if (r < 0) + return r; + + w = what ? inhibit_what_from_string(what) : 0; + if (w >= 0) + i->what = w; + + mm = mode ? inhibit_mode_from_string(mode) : INHIBIT_BLOCK; + if (mm >= 0) + i->mode = mm; + + if (uid) { + r = parse_uid(uid, &i->uid); + if (r < 0) + return r; + } + + if (pid) { + r = parse_pid(pid, &i->pid); + if (r < 0) + return r; + } + + if (who) { + r = cunescape(who, 0, &cc); + if (r < 0) + return r; + + free(i->who); + i->who = cc; + } + + if (why) { + r = cunescape(why, 0, &cc); + if (r < 0) + return r; + + free(i->why); + i->why = cc; + } + + if (i->fifo_path) { + int fd; + + fd = inhibitor_create_fifo(i); + safe_close(fd); + } + + return 0; +} + +static int inhibitor_dispatch_fifo(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + Inhibitor *i = userdata; + + assert(s); + assert(fd == i->fifo_fd); + assert(i); + + inhibitor_stop(i); + inhibitor_free(i); + + return 0; +} + +int inhibitor_create_fifo(Inhibitor *i) { + int r; + + assert(i); + + /* Create FIFO */ + if (!i->fifo_path) { + r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0); + if (r < 0) + return r; + + i->fifo_path = strjoin("/run/systemd/inhibit/", i->id, ".ref", NULL); + if (!i->fifo_path) + return -ENOMEM; + + if (mkfifo(i->fifo_path, 0600) < 0 && errno != EEXIST) + return -errno; + } + + /* Open reading side */ + if (i->fifo_fd < 0) { + i->fifo_fd = open(i->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); + if (i->fifo_fd < 0) + return -errno; + } + + if (!i->event_source) { + r = sd_event_add_io(i->manager->event, &i->event_source, i->fifo_fd, 0, inhibitor_dispatch_fifo, i); + if (r < 0) + return r; + + r = sd_event_source_set_priority(i->event_source, SD_EVENT_PRIORITY_IDLE-10); + if (r < 0) + return r; + } + + /* Open writing side */ + r = open(i->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); + if (r < 0) + return -errno; + + return r; +} + +void inhibitor_remove_fifo(Inhibitor *i) { + assert(i); + + i->event_source = sd_event_source_unref(i->event_source); + i->fifo_fd = safe_close(i->fifo_fd); + + if (i->fifo_path) { + unlink(i->fifo_path); + i->fifo_path = mfree(i->fifo_path); + } +} + +InhibitWhat manager_inhibit_what(Manager *m, InhibitMode mm) { + Inhibitor *i; + Iterator j; + InhibitWhat what = 0; + + assert(m); + + HASHMAP_FOREACH(i, m->inhibitors, j) + if (i->mode == mm) + what |= i->what; + + return what; +} + +static int pid_is_active(Manager *m, pid_t pid) { + Session *s; + int r; + + r = manager_get_session_by_pid(m, pid, &s); + if (r < 0) + return r; + + /* If there's no session assigned to it, then it's globally + * active on all ttys */ + if (r == 0) + return 1; + + return session_is_active(s); +} + +bool manager_is_inhibited( + Manager *m, + InhibitWhat w, + InhibitMode mm, + dual_timestamp *since, + bool ignore_inactive, + bool ignore_uid, + uid_t uid, + Inhibitor **offending) { + + Inhibitor *i; + Iterator j; + struct dual_timestamp ts = DUAL_TIMESTAMP_NULL; + bool inhibited = false; + + assert(m); + assert(w > 0 && w < _INHIBIT_WHAT_MAX); + + HASHMAP_FOREACH(i, m->inhibitors, j) { + if (!(i->what & w)) + continue; + + if (i->mode != mm) + continue; + + if (ignore_inactive && pid_is_active(m, i->pid) <= 0) + continue; + + if (ignore_uid && i->uid == uid) + continue; + + if (!inhibited || + i->since.monotonic < ts.monotonic) + ts = i->since; + + inhibited = true; + + if (offending) + *offending = i; + } + + if (since) + *since = ts; + + return inhibited; +} + +const char *inhibit_what_to_string(InhibitWhat w) { + static thread_local char buffer[97]; + char *p; + + if (w < 0 || w >= _INHIBIT_WHAT_MAX) + return NULL; + + p = buffer; + if (w & INHIBIT_SHUTDOWN) + p = stpcpy(p, "shutdown:"); + if (w & INHIBIT_SLEEP) + p = stpcpy(p, "sleep:"); + if (w & INHIBIT_IDLE) + p = stpcpy(p, "idle:"); + if (w & INHIBIT_HANDLE_POWER_KEY) + p = stpcpy(p, "handle-power-key:"); + if (w & INHIBIT_HANDLE_SUSPEND_KEY) + p = stpcpy(p, "handle-suspend-key:"); + if (w & INHIBIT_HANDLE_HIBERNATE_KEY) + p = stpcpy(p, "handle-hibernate-key:"); + if (w & INHIBIT_HANDLE_LID_SWITCH) + p = stpcpy(p, "handle-lid-switch:"); + + if (p > buffer) + *(p-1) = 0; + else + *p = 0; + + return buffer; +} + +InhibitWhat inhibit_what_from_string(const char *s) { + InhibitWhat what = 0; + const char *word, *state; + size_t l; + + FOREACH_WORD_SEPARATOR(word, l, s, ":", state) { + if (l == 8 && strneq(word, "shutdown", l)) + what |= INHIBIT_SHUTDOWN; + else if (l == 5 && strneq(word, "sleep", l)) + what |= INHIBIT_SLEEP; + else if (l == 4 && strneq(word, "idle", l)) + what |= INHIBIT_IDLE; + else if (l == 16 && strneq(word, "handle-power-key", l)) + what |= INHIBIT_HANDLE_POWER_KEY; + else if (l == 18 && strneq(word, "handle-suspend-key", l)) + what |= INHIBIT_HANDLE_SUSPEND_KEY; + else if (l == 20 && strneq(word, "handle-hibernate-key", l)) + what |= INHIBIT_HANDLE_HIBERNATE_KEY; + else if (l == 17 && strneq(word, "handle-lid-switch", l)) + what |= INHIBIT_HANDLE_LID_SWITCH; + else + return _INHIBIT_WHAT_INVALID; + } + + return what; +} + +static const char* const inhibit_mode_table[_INHIBIT_MODE_MAX] = { + [INHIBIT_BLOCK] = "block", + [INHIBIT_DELAY] = "delay" +}; + +DEFINE_STRING_TABLE_LOOKUP(inhibit_mode, InhibitMode); diff --git a/src/grp-login/systemd-logind/logind-inhibit.h b/src/grp-login/systemd-logind/logind-inhibit.h new file mode 100644 index 0000000000..70de199c60 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-inhibit.h @@ -0,0 +1,89 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +typedef struct Inhibitor Inhibitor; + + +typedef enum InhibitWhat { + INHIBIT_SHUTDOWN = 1, + INHIBIT_SLEEP = 2, + INHIBIT_IDLE = 4, + INHIBIT_HANDLE_POWER_KEY = 8, + INHIBIT_HANDLE_SUSPEND_KEY = 16, + INHIBIT_HANDLE_HIBERNATE_KEY = 32, + INHIBIT_HANDLE_LID_SWITCH = 64, + _INHIBIT_WHAT_MAX = 128, + _INHIBIT_WHAT_INVALID = -1 +} InhibitWhat; + +typedef enum InhibitMode { + INHIBIT_BLOCK, + INHIBIT_DELAY, + _INHIBIT_MODE_MAX, + _INHIBIT_MODE_INVALID = -1 +} InhibitMode; + +#include "logind.h" + +struct Inhibitor { + Manager *manager; + + sd_event_source *event_source; + + char *id; + char *state_file; + + bool started; + + InhibitWhat what; + char *who; + char *why; + InhibitMode mode; + + pid_t pid; + uid_t uid; + + dual_timestamp since; + + char *fifo_path; + int fifo_fd; +}; + +Inhibitor* inhibitor_new(Manager *m, const char *id); +void inhibitor_free(Inhibitor *i); + +int inhibitor_save(Inhibitor *i); +int inhibitor_load(Inhibitor *i); + +int inhibitor_start(Inhibitor *i); +int inhibitor_stop(Inhibitor *i); + +int inhibitor_create_fifo(Inhibitor *i); +void inhibitor_remove_fifo(Inhibitor *i); + +InhibitWhat manager_inhibit_what(Manager *m, InhibitMode mm); +bool manager_is_inhibited(Manager *m, InhibitWhat w, InhibitMode mm, dual_timestamp *since, bool ignore_inactive, bool ignore_uid, uid_t uid, Inhibitor **offending); + +const char *inhibit_what_to_string(InhibitWhat k); +InhibitWhat inhibit_what_from_string(const char *s); + +const char *inhibit_mode_to_string(InhibitMode k); +InhibitMode inhibit_mode_from_string(const char *s); diff --git a/src/grp-login/systemd-logind/logind-seat-dbus.c b/src/grp-login/systemd-logind/logind-seat-dbus.c new file mode 100644 index 0000000000..000a96cddc --- /dev/null +++ b/src/grp-login/systemd-logind/logind-seat-dbus.c @@ -0,0 +1,475 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <string.h> + +#include "sd-bus/bus-common-errors.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/bus-label.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/user-util.h" +#include "systemd-basic/util.h" + +#include "logind-seat.h" +#include "logind.h" + +static int property_get_active_session( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + _cleanup_free_ char *p = NULL; + Seat *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + p = s->active ? session_bus_path(s->active) : strdup("/"); + if (!p) + return -ENOMEM; + + return sd_bus_message_append(reply, "(so)", s->active ? s->active->id : "", p); +} + +static int property_get_can_multi_session( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Seat *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "b", seat_can_multi_session(s)); +} + +static int property_get_can_tty( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Seat *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "b", seat_can_tty(s)); +} + +static int property_get_can_graphical( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Seat *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "b", seat_can_graphical(s)); +} + +static int property_get_sessions( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Seat *s = userdata; + Session *session; + int r; + + assert(bus); + assert(reply); + assert(s); + + r = sd_bus_message_open_container(reply, 'a', "(so)"); + if (r < 0) + return r; + + LIST_FOREACH(sessions_by_seat, session, s->sessions) { + _cleanup_free_ char *p = NULL; + + p = session_bus_path(session); + if (!p) + return -ENOMEM; + + r = sd_bus_message_append(reply, "(so)", session->id, p); + if (r < 0) + return r; + + } + + r = sd_bus_message_close_container(reply); + if (r < 0) + return r; + + return 1; +} + +static int property_get_idle_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Seat *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "b", seat_get_idle_hint(s, NULL) > 0); +} + +static int property_get_idle_since_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Seat *s = userdata; + dual_timestamp t; + uint64_t u; + int r; + + assert(bus); + assert(reply); + assert(s); + + r = seat_get_idle_hint(s, &t); + if (r < 0) + return r; + + u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; + + return sd_bus_message_append(reply, "t", u); +} + +int bus_seat_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Seat *s = userdata; + int r; + + assert(message); + assert(s); + + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + UID_INVALID, + &s->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = seat_stop_sessions(s, true); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Seat *s = userdata; + const char *name; + Session *session; + int r; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "s", &name); + if (r < 0) + return r; + + session = hashmap_get(s->manager->sessions, name); + if (!session) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); + + if (session->seat != s) + return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", name, s->id); + + r = session_activate(session); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_switch_to(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Seat *s = userdata; + unsigned int to; + int r; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "u", &to); + if (r < 0) + return r; + + if (to <= 0) + return -EINVAL; + + r = seat_switch_to(s, to); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_switch_to_next(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Seat *s = userdata; + int r; + + assert(message); + assert(s); + + r = seat_switch_to_next(s); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_switch_to_previous(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Seat *s = userdata; + int r; + + assert(message); + assert(s); + + r = seat_switch_to_previous(s); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +const sd_bus_vtable seat_vtable[] = { + SD_BUS_VTABLE_START(0), + + SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Seat, id), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("ActiveSession", "(so)", property_get_active_session, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("CanMultiSession", "b", property_get_can_multi_session, 0, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("CanTTY", "b", property_get_can_tty, 0, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("CanGraphical", "b", property_get_can_graphical, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, 0), + SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + + SD_BUS_METHOD("Terminate", NULL, NULL, bus_seat_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SwitchTo", "u", NULL, method_switch_to, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SwitchToNext", NULL, NULL, method_switch_to_next, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SwitchToPrevious", NULL, NULL, method_switch_to_previous, SD_BUS_VTABLE_UNPRIVILEGED), + + SD_BUS_VTABLE_END +}; + +int seat_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { + Manager *m = userdata; + Seat *seat; + int r; + + assert(bus); + assert(path); + assert(interface); + assert(found); + assert(m); + + if (streq(path, "/org/freedesktop/login1/seat/self")) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + sd_bus_message *message; + Session *session; + const char *name; + + message = sd_bus_get_current_message(bus); + if (!message) + return 0; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_session(creds, &name); + if (r < 0) + return r; + + session = hashmap_get(m->sessions, name); + if (!session) + return 0; + + seat = session->seat; + } else { + _cleanup_free_ char *e = NULL; + const char *p; + + p = startswith(path, "/org/freedesktop/login1/seat/"); + if (!p) + return 0; + + e = bus_label_unescape(p); + if (!e) + return -ENOMEM; + + seat = hashmap_get(m->seats, e); + } + + if (!seat) + return 0; + + *found = seat; + return 1; +} + +char *seat_bus_path(Seat *s) { + _cleanup_free_ char *t = NULL; + + assert(s); + + t = bus_label_escape(s->id); + if (!t) + return NULL; + + return strappend("/org/freedesktop/login1/seat/", t); +} + +int seat_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { + _cleanup_strv_free_ char **l = NULL; + sd_bus_message *message; + Manager *m = userdata; + Seat *seat; + Iterator i; + int r; + + assert(bus); + assert(path); + assert(nodes); + + HASHMAP_FOREACH(seat, m->seats, i) { + char *p; + + p = seat_bus_path(seat); + if (!p) + return -ENOMEM; + + r = strv_consume(&l, p); + if (r < 0) + return r; + } + + message = sd_bus_get_current_message(bus); + if (message) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + const char *name; + Session *session; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds); + if (r >= 0) { + r = sd_bus_creds_get_session(creds, &name); + if (r >= 0) { + session = hashmap_get(m->sessions, name); + if (session && session->seat) { + r = strv_extend(&l, "/org/freedesktop/login1/seat/self"); + if (r < 0) + return r; + } + } + } + } + + *nodes = l; + l = NULL; + + return 1; +} + +int seat_send_signal(Seat *s, bool new_seat) { + _cleanup_free_ char *p = NULL; + + assert(s); + + p = seat_bus_path(s); + if (!p) + return -ENOMEM; + + return sd_bus_emit_signal( + s->manager->bus, + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + new_seat ? "SeatNew" : "SeatRemoved", + "so", s->id, p); +} + +int seat_send_changed(Seat *s, const char *properties, ...) { + _cleanup_free_ char *p = NULL; + char **l; + + assert(s); + + if (!s->started) + return 0; + + p = seat_bus_path(s); + if (!p) + return -ENOMEM; + + l = strv_from_stdarg_alloca(properties); + + return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Seat", l); +} diff --git a/src/grp-login/systemd-logind/logind-seat.c b/src/grp-login/systemd-logind/logind-seat.c new file mode 100644 index 0000000000..ea5513bea5 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-seat.c @@ -0,0 +1,693 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> + +#include <systemd/sd-messages.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/mkdir.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/stdio-util.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/terminal-util.h" +#include "systemd-basic/util.h" + +#include "logind-acl.h" +#include "logind-seat.h" + +Seat *seat_new(Manager *m, const char *id) { + Seat *s; + + assert(m); + assert(id); + + s = new0(Seat, 1); + if (!s) + return NULL; + + s->state_file = strappend("/run/systemd/seats/", id); + if (!s->state_file) + return mfree(s); + + s->id = basename(s->state_file); + s->manager = m; + + if (hashmap_put(m->seats, s->id, s) < 0) { + free(s->state_file); + return mfree(s); + } + + return s; +} + +void seat_free(Seat *s) { + assert(s); + + if (s->in_gc_queue) + LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s); + + while (s->sessions) + session_free(s->sessions); + + assert(!s->active); + + while (s->devices) + device_free(s->devices); + + hashmap_remove(s->manager->seats, s->id); + + free(s->positions); + free(s->state_file); + free(s); +} + +int seat_save(Seat *s) { + _cleanup_free_ char *temp_path = NULL; + _cleanup_fclose_ FILE *f = NULL; + int r; + + assert(s); + + if (!s->started) + return 0; + + r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0); + if (r < 0) + goto fail; + + r = fopen_temporary(s->state_file, &f, &temp_path); + if (r < 0) + goto fail; + + fchmod(fileno(f), 0644); + + fprintf(f, + "# This is private data. Do not parse.\n" + "IS_SEAT0=%i\n" + "CAN_MULTI_SESSION=%i\n" + "CAN_TTY=%i\n" + "CAN_GRAPHICAL=%i\n", + seat_is_seat0(s), + seat_can_multi_session(s), + seat_can_tty(s), + seat_can_graphical(s)); + + if (s->active) { + assert(s->active->user); + + fprintf(f, + "ACTIVE=%s\n" + "ACTIVE_UID="UID_FMT"\n", + s->active->id, + s->active->user->uid); + } + + if (s->sessions) { + Session *i; + + fputs("SESSIONS=", f); + LIST_FOREACH(sessions_by_seat, i, s->sessions) { + fprintf(f, + "%s%c", + i->id, + i->sessions_by_seat_next ? ' ' : '\n'); + } + + fputs("UIDS=", f); + LIST_FOREACH(sessions_by_seat, i, s->sessions) + fprintf(f, + UID_FMT"%c", + i->user->uid, + i->sessions_by_seat_next ? ' ' : '\n'); + } + + r = fflush_and_check(f); + if (r < 0) + goto fail; + + if (rename(temp_path, s->state_file) < 0) { + r = -errno; + goto fail; + } + + return 0; + +fail: + (void) unlink(s->state_file); + + if (temp_path) + (void) unlink(temp_path); + + return log_error_errno(r, "Failed to save seat data %s: %m", s->state_file); +} + +int seat_load(Seat *s) { + assert(s); + + /* There isn't actually anything to read here ... */ + + return 0; +} + +static int vt_allocate(unsigned int vtnr) { + char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)]; + _cleanup_close_ int fd = -1; + + assert(vtnr >= 1); + + xsprintf(p, "/dev/tty%u", vtnr); + fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); + if (fd < 0) + return -errno; + + return 0; +} + +int seat_preallocate_vts(Seat *s) { + int r = 0; + unsigned i; + + assert(s); + assert(s->manager); + + log_debug("Preallocating VTs..."); + + if (s->manager->n_autovts <= 0) + return 0; + + if (!seat_has_vts(s)) + return 0; + + for (i = 1; i <= s->manager->n_autovts; i++) { + int q; + + q = vt_allocate(i); + if (q < 0) { + log_error_errno(q, "Failed to preallocate VT %u: %m", i); + r = q; + } + } + + return r; +} + +int seat_apply_acls(Seat *s, Session *old_active) { + int r; + + assert(s); + + r = devnode_acl_all(s->manager->udev, + s->id, + false, + !!old_active, old_active ? old_active->user->uid : 0, + !!s->active, s->active ? s->active->user->uid : 0); + + if (r < 0) + log_error_errno(r, "Failed to apply ACLs: %m"); + + return r; +} + +int seat_set_active(Seat *s, Session *session) { + Session *old_active; + + assert(s); + assert(!session || session->seat == s); + + if (session == s->active) + return 0; + + old_active = s->active; + s->active = session; + + if (old_active) { + session_device_pause_all(old_active); + session_send_changed(old_active, "Active", NULL); + } + + seat_apply_acls(s, old_active); + + if (session && session->started) { + session_send_changed(session, "Active", NULL); + session_device_resume_all(session); + } + + if (!session || session->started) + seat_send_changed(s, "ActiveSession", NULL); + + seat_save(s); + + if (session) { + session_save(session); + user_save(session->user); + } + + if (old_active) { + session_save(old_active); + if (!session || session->user != old_active->user) + user_save(old_active->user); + } + + return 0; +} + +int seat_switch_to(Seat *s, unsigned int num) { + /* Public session positions skip 0 (there is only F1-F12). Maybe it + * will get reassigned in the future, so return error for now. */ + if (num == 0) + return -EINVAL; + + if (num >= s->position_count || !s->positions[num]) { + /* allow switching to unused VTs to trigger auto-activate */ + if (seat_has_vts(s) && num < 64) + return chvt(num); + + return -EINVAL; + } + + return session_activate(s->positions[num]); +} + +int seat_switch_to_next(Seat *s) { + unsigned int start, i; + + if (s->position_count == 0) + return -EINVAL; + + start = 1; + if (s->active && s->active->position > 0) + start = s->active->position; + + for (i = start + 1; i < s->position_count; ++i) + if (s->positions[i]) + return session_activate(s->positions[i]); + + for (i = 1; i < start; ++i) + if (s->positions[i]) + return session_activate(s->positions[i]); + + return -EINVAL; +} + +int seat_switch_to_previous(Seat *s) { + unsigned int start, i; + + if (s->position_count == 0) + return -EINVAL; + + start = 1; + if (s->active && s->active->position > 0) + start = s->active->position; + + for (i = start - 1; i > 0; --i) + if (s->positions[i]) + return session_activate(s->positions[i]); + + for (i = s->position_count - 1; i > start; --i) + if (s->positions[i]) + return session_activate(s->positions[i]); + + return -EINVAL; +} + +int seat_active_vt_changed(Seat *s, unsigned int vtnr) { + Session *i, *new_active = NULL; + int r; + + assert(s); + assert(vtnr >= 1); + + if (!seat_has_vts(s)) + return -EINVAL; + + log_debug("VT changed to %u", vtnr); + + /* we might have earlier closing sessions on the same VT, so try to + * find a running one first */ + LIST_FOREACH(sessions_by_seat, i, s->sessions) + if (i->vtnr == vtnr && !i->stopping) { + new_active = i; + break; + } + + if (!new_active) { + /* no running one? then we can't decide which one is the + * active one, let the first one win */ + LIST_FOREACH(sessions_by_seat, i, s->sessions) + if (i->vtnr == vtnr) { + new_active = i; + break; + } + } + + r = seat_set_active(s, new_active); + manager_spawn_autovt(s->manager, vtnr); + + return r; +} + +int seat_read_active_vt(Seat *s) { + char t[64]; + ssize_t k; + unsigned int vtnr; + int r; + + assert(s); + + if (!seat_has_vts(s)) + return 0; + + lseek(s->manager->console_active_fd, SEEK_SET, 0); + + k = read(s->manager->console_active_fd, t, sizeof(t)-1); + if (k <= 0) { + log_error("Failed to read current console: %s", k < 0 ? strerror(-errno) : "EOF"); + return k < 0 ? -errno : -EIO; + } + + t[k] = 0; + truncate_nl(t); + + if (!startswith(t, "tty")) { + log_error("Hm, /sys/class/tty/tty0/active is badly formatted."); + return -EIO; + } + + r = safe_atou(t+3, &vtnr); + if (r < 0) { + log_error("Failed to parse VT number %s", t+3); + return r; + } + + if (!vtnr) { + log_error("VT number invalid: %s", t+3); + return -EIO; + } + + return seat_active_vt_changed(s, vtnr); +} + +int seat_start(Seat *s) { + assert(s); + + if (s->started) + return 0; + + log_struct(LOG_INFO, + LOG_MESSAGE_ID(SD_MESSAGE_SEAT_START), + "SEAT_ID=%s", s->id, + LOG_MESSAGE("New seat %s.", s->id), + NULL); + + /* Initialize VT magic stuff */ + seat_preallocate_vts(s); + + /* Read current VT */ + seat_read_active_vt(s); + + s->started = true; + + /* Save seat data */ + seat_save(s); + + seat_send_signal(s, true); + + return 0; +} + +int seat_stop(Seat *s, bool force) { + int r = 0; + + assert(s); + + if (s->started) + log_struct(LOG_INFO, + LOG_MESSAGE_ID(SD_MESSAGE_SEAT_STOP), + "SEAT_ID=%s", s->id, + LOG_MESSAGE("Removed seat %s.", s->id), + NULL); + + seat_stop_sessions(s, force); + + unlink(s->state_file); + seat_add_to_gc_queue(s); + + if (s->started) + seat_send_signal(s, false); + + s->started = false; + + return r; +} + +int seat_stop_sessions(Seat *s, bool force) { + Session *session; + int r = 0, k; + + assert(s); + + LIST_FOREACH(sessions_by_seat, session, s->sessions) { + k = session_stop(session, force); + if (k < 0) + r = k; + } + + return r; +} + +void seat_evict_position(Seat *s, Session *session) { + Session *iter; + unsigned int pos = session->position; + + session->position = 0; + + if (pos == 0) + return; + + if (pos < s->position_count && s->positions[pos] == session) { + s->positions[pos] = NULL; + + /* There might be another session claiming the same + * position (eg., during gdm->session transition), so let's look + * for it and set it on the free slot. */ + LIST_FOREACH(sessions_by_seat, iter, s->sessions) { + if (iter->position == pos && session_get_state(iter) != SESSION_CLOSING) { + s->positions[pos] = iter; + break; + } + } + } +} + +void seat_claim_position(Seat *s, Session *session, unsigned int pos) { + /* with VTs, the position is always the same as the VTnr */ + if (seat_has_vts(s)) + pos = session->vtnr; + + if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1)) + return; + + seat_evict_position(s, session); + + session->position = pos; + if (pos > 0) + s->positions[pos] = session; +} + +static void seat_assign_position(Seat *s, Session *session) { + unsigned int pos; + + if (session->position > 0) + return; + + for (pos = 1; pos < s->position_count; ++pos) + if (!s->positions[pos]) + break; + + seat_claim_position(s, session, pos); +} + +int seat_attach_session(Seat *s, Session *session) { + assert(s); + assert(session); + assert(!session->seat); + + if (!seat_has_vts(s) != !session->vtnr) + return -EINVAL; + + session->seat = s; + LIST_PREPEND(sessions_by_seat, s->sessions, session); + seat_assign_position(s, session); + + seat_send_changed(s, "Sessions", NULL); + + /* On seats with VTs, the VT logic defines which session is active. On + * seats without VTs, we automatically activate new sessions. */ + if (!seat_has_vts(s)) + seat_set_active(s, session); + + return 0; +} + +void seat_complete_switch(Seat *s) { + Session *session; + + assert(s); + + /* if no session-switch is pending or if it got canceled, do nothing */ + if (!s->pending_switch) + return; + + session = s->pending_switch; + s->pending_switch = NULL; + + seat_set_active(s, session); +} + +bool seat_has_vts(Seat *s) { + assert(s); + + return seat_is_seat0(s) && s->manager->console_active_fd >= 0; +} + +bool seat_is_seat0(Seat *s) { + assert(s); + + return s->manager->seat0 == s; +} + +bool seat_can_multi_session(Seat *s) { + assert(s); + + return seat_has_vts(s); +} + +bool seat_can_tty(Seat *s) { + assert(s); + + return seat_has_vts(s); +} + +bool seat_has_master_device(Seat *s) { + assert(s); + + /* device list is ordered by "master" flag */ + return !!s->devices && s->devices->master; +} + +bool seat_can_graphical(Seat *s) { + assert(s); + + return seat_has_master_device(s); +} + +int seat_get_idle_hint(Seat *s, dual_timestamp *t) { + Session *session; + bool idle_hint = true; + dual_timestamp ts = DUAL_TIMESTAMP_NULL; + + assert(s); + + LIST_FOREACH(sessions_by_seat, session, s->sessions) { + dual_timestamp k; + int ih; + + ih = session_get_idle_hint(session, &k); + if (ih < 0) + return ih; + + if (!ih) { + if (!idle_hint) { + if (k.monotonic > ts.monotonic) + ts = k; + } else { + idle_hint = false; + ts = k; + } + } else if (idle_hint) { + + if (k.monotonic > ts.monotonic) + ts = k; + } + } + + if (t) + *t = ts; + + return idle_hint; +} + +bool seat_check_gc(Seat *s, bool drop_not_started) { + assert(s); + + if (drop_not_started && !s->started) + return false; + + if (seat_is_seat0(s)) + return true; + + return seat_has_master_device(s); +} + +void seat_add_to_gc_queue(Seat *s) { + assert(s); + + if (s->in_gc_queue) + return; + + LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); + s->in_gc_queue = true; +} + +static bool seat_name_valid_char(char c) { + return + (c >= 'a' && c <= 'z') || + (c >= 'A' && c <= 'Z') || + (c >= '0' && c <= '9') || + c == '-' || + c == '_'; +} + +bool seat_name_is_valid(const char *name) { + const char *p; + + assert(name); + + if (!startswith(name, "seat")) + return false; + + if (!name[4]) + return false; + + for (p = name; *p; p++) + if (!seat_name_valid_char(*p)) + return false; + + if (strlen(name) > 255) + return false; + + return true; +} diff --git a/src/grp-login/systemd-logind/logind-seat.h b/src/grp-login/systemd-logind/logind-seat.h new file mode 100644 index 0000000000..fba08ef5c3 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-seat.h @@ -0,0 +1,96 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "systemd-basic/list.h" + +typedef struct Seat Seat; + +#include "logind-session.h" + +struct Seat { + Manager *manager; + char *id; + + char *state_file; + + LIST_HEAD(Device, devices); + + Session *active; + Session *pending_switch; + LIST_HEAD(Session, sessions); + + Session **positions; + size_t position_count; + + bool in_gc_queue:1; + bool started:1; + + LIST_FIELDS(Seat, gc_queue); +}; + +Seat *seat_new(Manager *m, const char *id); +void seat_free(Seat *s); + +int seat_save(Seat *s); +int seat_load(Seat *s); + +int seat_apply_acls(Seat *s, Session *old_active); +int seat_set_active(Seat *s, Session *session); +int seat_switch_to(Seat *s, unsigned int num); +int seat_switch_to_next(Seat *s); +int seat_switch_to_previous(Seat *s); +int seat_active_vt_changed(Seat *s, unsigned int vtnr); +int seat_read_active_vt(Seat *s); +int seat_preallocate_vts(Seat *s); + +int seat_attach_session(Seat *s, Session *session); +void seat_complete_switch(Seat *s); +void seat_evict_position(Seat *s, Session *session); +void seat_claim_position(Seat *s, Session *session, unsigned int pos); + +bool seat_has_vts(Seat *s); +bool seat_is_seat0(Seat *s); +bool seat_can_multi_session(Seat *s); +bool seat_can_tty(Seat *s); +bool seat_has_master_device(Seat *s); +bool seat_can_graphical(Seat *s); + +int seat_get_idle_hint(Seat *s, dual_timestamp *t); + +int seat_start(Seat *s); +int seat_stop(Seat *s, bool force); +int seat_stop_sessions(Seat *s, bool force); + +bool seat_check_gc(Seat *s, bool drop_not_started); +void seat_add_to_gc_queue(Seat *s); + +bool seat_name_is_valid(const char *name); + +extern const sd_bus_vtable seat_vtable[]; + +int seat_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error); +int seat_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error); +char *seat_bus_path(Seat *s); + +int seat_send_signal(Seat *s, bool new_seat); +int seat_send_changed(Seat *s, const char *properties, ...) _sentinel_; + +int bus_seat_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error); diff --git a/src/grp-login/systemd-logind/logind-session-dbus.c b/src/grp-login/systemd-logind/logind-session-dbus.c new file mode 100644 index 0000000000..ffcc1c8324 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-session-dbus.c @@ -0,0 +1,799 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <string.h> + +#include "sd-bus/bus-common-errors.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/bus-label.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/signal-util.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/util.h" + +#include "logind-session-device.h" +#include "logind-session.h" +#include "logind.h" + +static int property_get_user( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + _cleanup_free_ char *p = NULL; + Session *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + p = user_bus_path(s->user); + if (!p) + return -ENOMEM; + + return sd_bus_message_append(reply, "(uo)", (uint32_t) s->user->uid, p); +} + +static int property_get_name( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Session *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "s", s->user->name); +} + +static int property_get_seat( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + _cleanup_free_ char *p = NULL; + Session *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + p = s->seat ? seat_bus_path(s->seat) : strdup("/"); + if (!p) + return -ENOMEM; + + return sd_bus_message_append(reply, "(so)", s->seat ? s->seat->id : "", p); +} + +static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, session_type, SessionType); +static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_class, session_class, SessionClass); + +static int property_get_active( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Session *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "b", session_is_active(s)); +} + +static int property_get_state( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Session *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "s", session_state_to_string(session_get_state(s))); +} + +static int property_get_idle_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Session *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "b", session_get_idle_hint(s, NULL) > 0); +} + +static int property_get_idle_since_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Session *s = userdata; + dual_timestamp t = DUAL_TIMESTAMP_NULL; + uint64_t u; + int r; + + assert(bus); + assert(reply); + assert(s); + + r = session_get_idle_hint(s, &t); + if (r < 0) + return r; + + u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; + + return sd_bus_message_append(reply, "t", u); +} + +static int property_get_locked_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Session *s = userdata; + + assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "b", session_get_locked_hint(s) > 0); +} + +int bus_session_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + int r; + + assert(message); + assert(s); + + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + s->user->uid, + &s->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = session_stop(s, true); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_session_method_activate(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + int r; + + assert(message); + assert(s); + + r = session_activate(s); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_session_method_lock(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + int r; + + assert(message); + assert(s); + + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.lock-sessions", + NULL, + false, + s->user->uid, + &s->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = session_send_lock(s, strstr(sd_bus_message_get_member(message), "Lock")); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_set_idle_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + Session *s = userdata; + uid_t uid; + int r, b; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "b", &b); + if (r < 0) + return r; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_euid(creds, &uid); + if (r < 0) + return r; + + if (uid != 0 && uid != s->user->uid) + return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set idle hint"); + + session_set_idle_hint(s, b); + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_set_locked_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + Session *s = userdata; + uid_t uid; + int r, b; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "b", &b); + if (r < 0) + return r; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_euid(creds, &uid); + if (r < 0) + return r; + + if (uid != 0 && uid != s->user->uid) + return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set locked hint"); + + session_set_locked_hint(s, b); + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_session_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + const char *swho; + int32_t signo; + KillWho who; + int r; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "si", &swho, &signo); + if (r < 0) + return r; + + if (isempty(swho)) + who = KILL_ALL; + else { + who = kill_who_from_string(swho); + if (who < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho); + } + + if (!SIGNAL_VALID(signo)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo); + + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + s->user->uid, + &s->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = session_kill(s, who, signo); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_take_control(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + Session *s = userdata; + int r, force; + uid_t uid; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "b", &force); + if (r < 0) + return r; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_euid(creds, &uid); + if (r < 0) + return r; + + if (uid != 0 && (force || uid != s->user->uid)) + return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may take control"); + + r = session_set_controller(s, sd_bus_message_get_sender(message), force); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_release_control(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + + assert(message); + assert(s); + + if (!session_is_controller(s, sd_bus_message_get_sender(message))) + return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session"); + + session_drop_controller(s); + + return sd_bus_reply_method_return(message, NULL); +} + +static int method_take_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + uint32_t major, minor; + SessionDevice *sd; + dev_t dev; + int r; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "uu", &major, &minor); + if (r < 0) + return r; + + if (!session_is_controller(s, sd_bus_message_get_sender(message))) + return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session"); + + dev = makedev(major, minor); + sd = hashmap_get(s->devices, &dev); + if (sd) + /* We don't allow retrieving a device multiple times. + * The related ReleaseDevice call is not ref-counted. + * The caller should use dup() if it requires more + * than one fd (it would be functionally + * equivalent). */ + return sd_bus_error_setf(error, BUS_ERROR_DEVICE_IS_TAKEN, "Device already taken"); + + r = session_device_new(s, dev, &sd); + if (r < 0) + return r; + + r = sd_bus_reply_method_return(message, "hb", sd->fd, !sd->active); + if (r < 0) + session_device_free(sd); + + return r; +} + +static int method_release_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + uint32_t major, minor; + SessionDevice *sd; + dev_t dev; + int r; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "uu", &major, &minor); + if (r < 0) + return r; + + if (!session_is_controller(s, sd_bus_message_get_sender(message))) + return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session"); + + dev = makedev(major, minor); + sd = hashmap_get(s->devices, &dev); + if (!sd) + return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken"); + + session_device_free(sd); + return sd_bus_reply_method_return(message, NULL); +} + +static int method_pause_device_complete(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + uint32_t major, minor; + SessionDevice *sd; + dev_t dev; + int r; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "uu", &major, &minor); + if (r < 0) + return r; + + if (!session_is_controller(s, sd_bus_message_get_sender(message))) + return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session"); + + dev = makedev(major, minor); + sd = hashmap_get(s->devices, &dev); + if (!sd) + return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken"); + + session_device_complete_pause(sd); + + return sd_bus_reply_method_return(message, NULL); +} + +const sd_bus_vtable session_vtable[] = { + SD_BUS_VTABLE_START(0), + + SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Session, id), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("User", "(uo)", property_get_user, 0, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Name", "s", property_get_name, 0, SD_BUS_VTABLE_PROPERTY_CONST), + BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(Session, timestamp), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("VTNr", "u", NULL, offsetof(Session, vtnr), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Seat", "(so)", property_get_seat, 0, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("TTY", "s", NULL, offsetof(Session, tty), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Display", "s", NULL, offsetof(Session, display), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Remote", "b", bus_property_get_bool, offsetof(Session, remote), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("RemoteHost", "s", NULL, offsetof(Session, remote_host), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("RemoteUser", "s", NULL, offsetof(Session, remote_user), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Service", "s", NULL, offsetof(Session, service), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Desktop", "s", NULL, offsetof(Session, desktop), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Scope", "s", NULL, offsetof(Session, scope), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Leader", "u", bus_property_get_pid, offsetof(Session, leader), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Audit", "u", NULL, offsetof(Session, audit_id), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Session, type), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Class", "s", property_get_class, offsetof(Session, class), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Active", "b", property_get_active, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0), + SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("LockedHint", "b", property_get_locked_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + + SD_BUS_METHOD("Terminate", NULL, NULL, bus_session_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Activate", NULL, NULL, bus_session_method_activate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Lock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Unlock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetIdleHint", "b", NULL, method_set_idle_hint, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetLockedHint", "b", NULL, method_set_locked_hint, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Kill", "si", NULL, bus_session_method_kill, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("TakeControl", "b", NULL, method_take_control, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ReleaseControl", NULL, NULL, method_release_control, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("TakeDevice", "uu", "hb", method_take_device, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ReleaseDevice", "uu", NULL, method_release_device, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("PauseDeviceComplete", "uu", NULL, method_pause_device_complete, SD_BUS_VTABLE_UNPRIVILEGED), + + SD_BUS_SIGNAL("PauseDevice", "uus", 0), + SD_BUS_SIGNAL("ResumeDevice", "uuh", 0), + SD_BUS_SIGNAL("Lock", NULL, 0), + SD_BUS_SIGNAL("Unlock", NULL, 0), + + SD_BUS_VTABLE_END +}; + +int session_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { + Manager *m = userdata; + Session *session; + int r; + + assert(bus); + assert(path); + assert(interface); + assert(found); + assert(m); + + if (streq(path, "/org/freedesktop/login1/session/self")) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + sd_bus_message *message; + const char *name; + + message = sd_bus_get_current_message(bus); + if (!message) + return 0; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_session(creds, &name); + if (r < 0) + return r; + + session = hashmap_get(m->sessions, name); + } else { + _cleanup_free_ char *e = NULL; + const char *p; + + p = startswith(path, "/org/freedesktop/login1/session/"); + if (!p) + return 0; + + e = bus_label_unescape(p); + if (!e) + return -ENOMEM; + + session = hashmap_get(m->sessions, e); + } + + if (!session) + return 0; + + *found = session; + return 1; +} + +char *session_bus_path(Session *s) { + _cleanup_free_ char *t = NULL; + + assert(s); + + t = bus_label_escape(s->id); + if (!t) + return NULL; + + return strappend("/org/freedesktop/login1/session/", t); +} + +int session_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { + _cleanup_strv_free_ char **l = NULL; + sd_bus_message *message; + Manager *m = userdata; + Session *session; + Iterator i; + int r; + + assert(bus); + assert(path); + assert(nodes); + + HASHMAP_FOREACH(session, m->sessions, i) { + char *p; + + p = session_bus_path(session); + if (!p) + return -ENOMEM; + + r = strv_consume(&l, p); + if (r < 0) + return r; + } + + message = sd_bus_get_current_message(bus); + if (message) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + const char *name; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds); + if (r >= 0) { + r = sd_bus_creds_get_session(creds, &name); + if (r >= 0) { + session = hashmap_get(m->sessions, name); + if (session) { + r = strv_extend(&l, "/org/freedesktop/login1/session/self"); + if (r < 0) + return r; + } + } + } + } + + *nodes = l; + l = NULL; + + return 1; +} + +int session_send_signal(Session *s, bool new_session) { + _cleanup_free_ char *p = NULL; + + assert(s); + + p = session_bus_path(s); + if (!p) + return -ENOMEM; + + return sd_bus_emit_signal( + s->manager->bus, + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + new_session ? "SessionNew" : "SessionRemoved", + "so", s->id, p); +} + +int session_send_changed(Session *s, const char *properties, ...) { + _cleanup_free_ char *p = NULL; + char **l; + + assert(s); + + if (!s->started) + return 0; + + p = session_bus_path(s); + if (!p) + return -ENOMEM; + + l = strv_from_stdarg_alloca(properties); + + return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Session", l); +} + +int session_send_lock(Session *s, bool lock) { + _cleanup_free_ char *p = NULL; + + assert(s); + + p = session_bus_path(s); + if (!p) + return -ENOMEM; + + return sd_bus_emit_signal( + s->manager->bus, + p, + "org.freedesktop.login1.Session", + lock ? "Lock" : "Unlock", + NULL); +} + +int session_send_lock_all(Manager *m, bool lock) { + Session *session; + Iterator i; + int r = 0; + + assert(m); + + HASHMAP_FOREACH(session, m->sessions, i) { + int k; + + k = session_send_lock(session, lock); + if (k < 0) + r = k; + } + + return r; +} + +int session_send_create_reply(Session *s, sd_bus_error *error) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *c = NULL; + _cleanup_close_ int fifo_fd = -1; + _cleanup_free_ char *p = NULL; + + assert(s); + + /* This is called after the session scope and the user service + * were successfully created, and finishes where + * bus_manager_create_session() left off. */ + + if (!s->create_message) + return 0; + + if (!sd_bus_error_is_set(error) && (s->scope_job || s->user->service_job)) + return 0; + + c = s->create_message; + s->create_message = NULL; + + if (error) + return sd_bus_reply_method_error(c, error); + + fifo_fd = session_create_fifo(s); + if (fifo_fd < 0) + return fifo_fd; + + /* Update the session state file before we notify the client + * about the result. */ + session_save(s); + + p = session_bus_path(s); + if (!p) + return -ENOMEM; + + log_debug("Sending reply about created session: " + "id=%s object_path=%s uid=%u runtime_path=%s " + "session_fd=%d seat=%s vtnr=%u", + s->id, + p, + (uint32_t) s->user->uid, + s->user->runtime_path, + fifo_fd, + s->seat ? s->seat->id : "", + (uint32_t) s->vtnr); + + return sd_bus_reply_method_return( + c, "soshusub", + s->id, + p, + s->user->runtime_path, + fifo_fd, + (uint32_t) s->user->uid, + s->seat ? s->seat->id : "", + (uint32_t) s->vtnr, + false); +} diff --git a/src/grp-login/systemd-logind/logind-session-device.c b/src/grp-login/systemd-logind/logind-session-device.c new file mode 100644 index 0000000000..131e000439 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-session-device.c @@ -0,0 +1,482 @@ +/*** + This file is part of systemd. + + Copyright 2013 David Herrmann + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <fcntl.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sys/types.h> + +#include <linux/input.h> + +#include <libudev.h> + +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/missing.h" +#include "systemd-basic/util.h" + +#include "logind-session-device.h" + +enum SessionDeviceNotifications { + SESSION_DEVICE_RESUME, + SESSION_DEVICE_TRY_PAUSE, + SESSION_DEVICE_PAUSE, + SESSION_DEVICE_RELEASE, +}; + +static int session_device_notify(SessionDevice *sd, enum SessionDeviceNotifications type) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; + _cleanup_free_ char *path = NULL; + const char *t = NULL; + uint32_t major, minor; + int r; + + assert(sd); + + major = major(sd->dev); + minor = minor(sd->dev); + + if (!sd->session->controller) + return 0; + + path = session_bus_path(sd->session); + if (!path) + return -ENOMEM; + + r = sd_bus_message_new_signal( + sd->session->manager->bus, + &m, path, + "org.freedesktop.login1.Session", + (type == SESSION_DEVICE_RESUME) ? "ResumeDevice" : "PauseDevice"); + if (!m) + return r; + + r = sd_bus_message_set_destination(m, sd->session->controller); + if (r < 0) + return r; + + switch (type) { + case SESSION_DEVICE_RESUME: + r = sd_bus_message_append(m, "uuh", major, minor, sd->fd); + if (r < 0) + return r; + break; + case SESSION_DEVICE_TRY_PAUSE: + t = "pause"; + break; + case SESSION_DEVICE_PAUSE: + t = "force"; + break; + case SESSION_DEVICE_RELEASE: + t = "gone"; + break; + default: + return -EINVAL; + } + + if (t) { + r = sd_bus_message_append(m, "uus", major, minor, t); + if (r < 0) + return r; + } + + return sd_bus_send(sd->session->manager->bus, m, NULL); +} + +static int sd_eviocrevoke(int fd) { + static bool warned; + int r; + + assert(fd >= 0); + + r = ioctl(fd, EVIOCREVOKE, NULL); + if (r < 0) { + r = -errno; + if (r == -EINVAL && !warned) { + warned = true; + log_warning("kernel does not support evdev-revocation"); + } + } + + return 0; +} + +static int sd_drmsetmaster(int fd) { + int r; + + assert(fd >= 0); + + r = ioctl(fd, DRM_IOCTL_SET_MASTER, 0); + if (r < 0) + return -errno; + + return 0; +} + +static int sd_drmdropmaster(int fd) { + int r; + + assert(fd >= 0); + + r = ioctl(fd, DRM_IOCTL_DROP_MASTER, 0); + if (r < 0) + return -errno; + + return 0; +} + +static int session_device_open(SessionDevice *sd, bool active) { + int fd, r; + + assert(sd->type != DEVICE_TYPE_UNKNOWN); + + /* open device and try to get an udev_device from it */ + fd = open(sd->node, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); + if (fd < 0) + return -errno; + + switch (sd->type) { + case DEVICE_TYPE_DRM: + if (active) { + /* Weird legacy DRM semantics might return an error + * even though we're master. No way to detect that so + * fail at all times and let caller retry in inactive + * state. */ + r = sd_drmsetmaster(fd); + if (r < 0) { + close_nointr(fd); + return r; + } + } else { + /* DRM-Master is granted to the first user who opens a + * device automatically (ughh, racy!). Hence, we just + * drop DRM-Master in case we were the first. */ + sd_drmdropmaster(fd); + } + break; + case DEVICE_TYPE_EVDEV: + if (!active) + sd_eviocrevoke(fd); + break; + case DEVICE_TYPE_UNKNOWN: + default: + /* fallback for devices wihout synchronizations */ + break; + } + + return fd; +} + +static int session_device_start(SessionDevice *sd) { + int r; + + assert(sd); + assert(session_is_active(sd->session)); + + if (sd->active) + return 0; + + switch (sd->type) { + case DEVICE_TYPE_DRM: + /* Device is kept open. Simply call drmSetMaster() and hope + * there is no-one else. In case it fails, we keep the device + * paused. Maybe at some point we have a drmStealMaster(). */ + r = sd_drmsetmaster(sd->fd); + if (r < 0) + return r; + break; + case DEVICE_TYPE_EVDEV: + /* Evdev devices are revoked while inactive. Reopen it and we + * are fine. */ + r = session_device_open(sd, true); + if (r < 0) + return r; + close_nointr(sd->fd); + sd->fd = r; + break; + case DEVICE_TYPE_UNKNOWN: + default: + /* fallback for devices wihout synchronizations */ + break; + } + + sd->active = true; + return 0; +} + +static void session_device_stop(SessionDevice *sd) { + assert(sd); + + if (!sd->active) + return; + + switch (sd->type) { + case DEVICE_TYPE_DRM: + /* On DRM devices we simply drop DRM-Master but keep it open. + * This allows the user to keep resources allocated. The + * CAP_SYS_ADMIN restriction to DRM-Master prevents users from + * circumventing this. */ + sd_drmdropmaster(sd->fd); + break; + case DEVICE_TYPE_EVDEV: + /* Revoke access on evdev file-descriptors during deactivation. + * This will basically prevent any operations on the fd and + * cannot be undone. Good side is: it needs no CAP_SYS_ADMIN + * protection this way. */ + sd_eviocrevoke(sd->fd); + break; + case DEVICE_TYPE_UNKNOWN: + default: + /* fallback for devices without synchronization */ + break; + } + + sd->active = false; +} + +static DeviceType detect_device_type(struct udev_device *dev) { + const char *sysname, *subsystem; + DeviceType type; + + sysname = udev_device_get_sysname(dev); + subsystem = udev_device_get_subsystem(dev); + type = DEVICE_TYPE_UNKNOWN; + + if (streq_ptr(subsystem, "drm")) { + if (startswith(sysname, "card")) + type = DEVICE_TYPE_DRM; + } else if (streq_ptr(subsystem, "input")) { + if (startswith(sysname, "event")) + type = DEVICE_TYPE_EVDEV; + } + + return type; +} + +static int session_device_verify(SessionDevice *sd) { + struct udev_device *dev, *p = NULL; + const char *sp, *node; + int r; + + dev = udev_device_new_from_devnum(sd->session->manager->udev, 'c', sd->dev); + if (!dev) + return -ENODEV; + + sp = udev_device_get_syspath(dev); + node = udev_device_get_devnode(dev); + if (!node) { + r = -EINVAL; + goto err_dev; + } + + /* detect device type so we can find the correct sysfs parent */ + sd->type = detect_device_type(dev); + if (sd->type == DEVICE_TYPE_UNKNOWN) { + r = -ENODEV; + goto err_dev; + } else if (sd->type == DEVICE_TYPE_EVDEV) { + /* for evdev devices we need the parent node as device */ + p = dev; + dev = udev_device_get_parent_with_subsystem_devtype(p, "input", NULL); + if (!dev) { + r = -ENODEV; + goto err_dev; + } + sp = udev_device_get_syspath(dev); + } else if (sd->type != DEVICE_TYPE_DRM) { + /* Prevent opening unsupported devices. Especially devices of + * subsystem "input" must be opened via the evdev node as + * we require EVIOCREVOKE. */ + r = -ENODEV; + goto err_dev; + } + + /* search for an existing seat device and return it if available */ + sd->device = hashmap_get(sd->session->manager->devices, sp); + if (!sd->device) { + /* The caller might have gotten the udev event before we were + * able to process it. Hence, fake the "add" event and let the + * logind-manager handle the new device. */ + r = manager_process_seat_device(sd->session->manager, dev); + if (r < 0) + goto err_dev; + + /* if it's still not available, then the device is invalid */ + sd->device = hashmap_get(sd->session->manager->devices, sp); + if (!sd->device) { + r = -ENODEV; + goto err_dev; + } + } + + if (sd->device->seat != sd->session->seat) { + r = -EPERM; + goto err_dev; + } + + sd->node = strdup(node); + if (!sd->node) { + r = -ENOMEM; + goto err_dev; + } + + r = 0; +err_dev: + udev_device_unref(p ? : dev); + return r; +} + +int session_device_new(Session *s, dev_t dev, SessionDevice **out) { + SessionDevice *sd; + int r; + + assert(s); + assert(out); + + if (!s->seat) + return -EPERM; + + sd = new0(SessionDevice, 1); + if (!sd) + return -ENOMEM; + + sd->session = s; + sd->dev = dev; + sd->fd = -1; + sd->type = DEVICE_TYPE_UNKNOWN; + + r = session_device_verify(sd); + if (r < 0) + goto error; + + r = hashmap_put(s->devices, &sd->dev, sd); + if (r < 0) { + r = -ENOMEM; + goto error; + } + + /* Open the device for the first time. We need a valid fd to pass back + * to the caller. If the session is not active, this _might_ immediately + * revoke access and thus invalidate the fd. But this is still needed + * to pass a valid fd back. */ + sd->active = session_is_active(s); + r = session_device_open(sd, sd->active); + if (r < 0) { + /* EINVAL _may_ mean a master is active; retry inactive */ + if (sd->active && r == -EINVAL) { + sd->active = false; + r = session_device_open(sd, false); + } + if (r < 0) + goto error; + } + sd->fd = r; + + LIST_PREPEND(sd_by_device, sd->device->session_devices, sd); + + *out = sd; + return 0; + +error: + hashmap_remove(s->devices, &sd->dev); + free(sd->node); + free(sd); + return r; +} + +void session_device_free(SessionDevice *sd) { + assert(sd); + + session_device_stop(sd); + session_device_notify(sd, SESSION_DEVICE_RELEASE); + close_nointr(sd->fd); + + LIST_REMOVE(sd_by_device, sd->device->session_devices, sd); + + hashmap_remove(sd->session->devices, &sd->dev); + + free(sd->node); + free(sd); +} + +void session_device_complete_pause(SessionDevice *sd) { + SessionDevice *iter; + Iterator i; + + if (!sd->active) + return; + + session_device_stop(sd); + + /* if not all devices are paused, wait for further completion events */ + HASHMAP_FOREACH(iter, sd->session->devices, i) + if (iter->active) + return; + + /* complete any pending session switch */ + seat_complete_switch(sd->session->seat); +} + +void session_device_resume_all(Session *s) { + SessionDevice *sd; + Iterator i; + int r; + + assert(s); + + HASHMAP_FOREACH(sd, s->devices, i) { + if (!sd->active) { + r = session_device_start(sd); + if (!r) + session_device_notify(sd, SESSION_DEVICE_RESUME); + } + } +} + +void session_device_pause_all(Session *s) { + SessionDevice *sd; + Iterator i; + + assert(s); + + HASHMAP_FOREACH(sd, s->devices, i) { + if (sd->active) { + session_device_stop(sd); + session_device_notify(sd, SESSION_DEVICE_PAUSE); + } + } +} + +unsigned int session_device_try_pause_all(Session *s) { + SessionDevice *sd; + Iterator i; + unsigned int num_pending = 0; + + assert(s); + + HASHMAP_FOREACH(sd, s->devices, i) { + if (sd->active) { + session_device_notify(sd, SESSION_DEVICE_TRY_PAUSE); + ++num_pending; + } + } + + return num_pending; +} diff --git a/src/grp-login/systemd-logind/logind-session-device.h b/src/grp-login/systemd-logind/logind-session-device.h new file mode 100644 index 0000000000..4bd0f28695 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-session-device.h @@ -0,0 +1,54 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2013 David Herrmann + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "systemd-basic/list.h" + +typedef enum DeviceType DeviceType; +typedef struct SessionDevice SessionDevice; + +#include "logind.h" + +enum DeviceType { + DEVICE_TYPE_UNKNOWN, + DEVICE_TYPE_DRM, + DEVICE_TYPE_EVDEV, +}; + +struct SessionDevice { + Session *session; + Device *device; + + dev_t dev; + char *node; + int fd; + bool active; + DeviceType type; + + LIST_FIELDS(struct SessionDevice, sd_by_device); +}; + +int session_device_new(Session *s, dev_t dev, SessionDevice **out); +void session_device_free(SessionDevice *sd); +void session_device_complete_pause(SessionDevice *sd); + +void session_device_resume_all(Session *s); +void session_device_pause_all(Session *s); +unsigned int session_device_try_pause_all(Session *s); diff --git a/src/grp-login/systemd-logind/logind-session.c b/src/grp-login/systemd-logind/logind-session.c new file mode 100644 index 0000000000..f25f4b6555 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-session.c @@ -0,0 +1,1271 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <fcntl.h> +#include <signal.h> +#include <string.h> +#include <sys/ioctl.h> +#include <unistd.h> + +#include <linux/kd.h> +#include <linux/vt.h> + +#include <systemd/sd-messages.h> + +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/audit-util.h" +#include "systemd-basic/escape.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/io-util.h" +#include "systemd-basic/mkdir.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/path-util.h" +#include "systemd-basic/string-table.h" +#include "systemd-basic/terminal-util.h" +#include "systemd-basic/user-util.h" +#include "systemd-basic/util.h" + +#include "logind-session.h" + +#define RELEASE_USEC (20*USEC_PER_SEC) + +static void session_remove_fifo(Session *s); + +Session* session_new(Manager *m, const char *id) { + Session *s; + + assert(m); + assert(id); + assert(session_id_valid(id)); + + s = new0(Session, 1); + if (!s) + return NULL; + + s->state_file = strappend("/run/systemd/sessions/", id); + if (!s->state_file) + return mfree(s); + + s->devices = hashmap_new(&devt_hash_ops); + if (!s->devices) { + free(s->state_file); + return mfree(s); + } + + s->id = basename(s->state_file); + + if (hashmap_put(m->sessions, s->id, s) < 0) { + hashmap_free(s->devices); + free(s->state_file); + return mfree(s); + } + + s->manager = m; + s->fifo_fd = -1; + s->vtfd = -1; + + return s; +} + +void session_free(Session *s) { + SessionDevice *sd; + + assert(s); + + if (s->in_gc_queue) + LIST_REMOVE(gc_queue, s->manager->session_gc_queue, s); + + s->timer_event_source = sd_event_source_unref(s->timer_event_source); + + session_remove_fifo(s); + + session_drop_controller(s); + + while ((sd = hashmap_first(s->devices))) + session_device_free(sd); + + hashmap_free(s->devices); + + if (s->user) { + LIST_REMOVE(sessions_by_user, s->user->sessions, s); + + if (s->user->display == s) + s->user->display = NULL; + } + + if (s->seat) { + if (s->seat->active == s) + s->seat->active = NULL; + if (s->seat->pending_switch == s) + s->seat->pending_switch = NULL; + + seat_evict_position(s->seat, s); + LIST_REMOVE(sessions_by_seat, s->seat->sessions, s); + } + + if (s->scope) { + hashmap_remove(s->manager->session_units, s->scope); + free(s->scope); + } + + free(s->scope_job); + + sd_bus_message_unref(s->create_message); + + free(s->tty); + free(s->display); + free(s->remote_host); + free(s->remote_user); + free(s->service); + free(s->desktop); + + hashmap_remove(s->manager->sessions, s->id); + + free(s->state_file); + free(s); +} + +void session_set_user(Session *s, User *u) { + assert(s); + assert(!s->user); + + s->user = u; + LIST_PREPEND(sessions_by_user, u->sessions, s); +} + +int session_save(Session *s) { + _cleanup_free_ char *temp_path = NULL; + _cleanup_fclose_ FILE *f = NULL; + int r = 0; + + assert(s); + + if (!s->user) + return -ESTALE; + + if (!s->started) + return 0; + + r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); + if (r < 0) + goto fail; + + r = fopen_temporary(s->state_file, &f, &temp_path); + if (r < 0) + goto fail; + + assert(s->user); + + fchmod(fileno(f), 0644); + + fprintf(f, + "# This is private data. Do not parse.\n" + "UID="UID_FMT"\n" + "USER=%s\n" + "ACTIVE=%i\n" + "STATE=%s\n" + "REMOTE=%i\n", + s->user->uid, + s->user->name, + session_is_active(s), + session_state_to_string(session_get_state(s)), + s->remote); + + if (s->type >= 0) + fprintf(f, "TYPE=%s\n", session_type_to_string(s->type)); + + if (s->class >= 0) + fprintf(f, "CLASS=%s\n", session_class_to_string(s->class)); + + if (s->scope) + fprintf(f, "SCOPE=%s\n", s->scope); + if (s->scope_job) + fprintf(f, "SCOPE_JOB=%s\n", s->scope_job); + + if (s->fifo_path) + fprintf(f, "FIFO=%s\n", s->fifo_path); + + if (s->seat) + fprintf(f, "SEAT=%s\n", s->seat->id); + + if (s->tty) + fprintf(f, "TTY=%s\n", s->tty); + + if (s->display) + fprintf(f, "DISPLAY=%s\n", s->display); + + if (s->remote_host) { + _cleanup_free_ char *escaped; + + escaped = cescape(s->remote_host); + if (!escaped) { + r = -ENOMEM; + goto fail; + } + + fprintf(f, "REMOTE_HOST=%s\n", escaped); + } + + if (s->remote_user) { + _cleanup_free_ char *escaped; + + escaped = cescape(s->remote_user); + if (!escaped) { + r = -ENOMEM; + goto fail; + } + + fprintf(f, "REMOTE_USER=%s\n", escaped); + } + + if (s->service) { + _cleanup_free_ char *escaped; + + escaped = cescape(s->service); + if (!escaped) { + r = -ENOMEM; + goto fail; + } + + fprintf(f, "SERVICE=%s\n", escaped); + } + + if (s->desktop) { + _cleanup_free_ char *escaped; + + + escaped = cescape(s->desktop); + if (!escaped) { + r = -ENOMEM; + goto fail; + } + + fprintf(f, "DESKTOP=%s\n", escaped); + } + + if (s->seat && seat_has_vts(s->seat)) + fprintf(f, "VTNR=%u\n", s->vtnr); + + if (!s->vtnr) + fprintf(f, "POSITION=%u\n", s->position); + + if (s->leader > 0) + fprintf(f, "LEADER="PID_FMT"\n", s->leader); + + if (s->audit_id > 0) + fprintf(f, "AUDIT=%"PRIu32"\n", s->audit_id); + + if (dual_timestamp_is_set(&s->timestamp)) + fprintf(f, + "REALTIME="USEC_FMT"\n" + "MONOTONIC="USEC_FMT"\n", + s->timestamp.realtime, + s->timestamp.monotonic); + + if (s->controller) + fprintf(f, "CONTROLLER=%s\n", s->controller); + + r = fflush_and_check(f); + if (r < 0) + goto fail; + + if (rename(temp_path, s->state_file) < 0) { + r = -errno; + goto fail; + } + + return 0; + +fail: + (void) unlink(s->state_file); + + if (temp_path) + (void) unlink(temp_path); + + return log_error_errno(r, "Failed to save session data %s: %m", s->state_file); +} + + +int session_load(Session *s) { + _cleanup_free_ char *remote = NULL, + *seat = NULL, + *vtnr = NULL, + *state = NULL, + *position = NULL, + *leader = NULL, + *type = NULL, + *class = NULL, + *uid = NULL, + *realtime = NULL, + *monotonic = NULL, + *controller = NULL; + + int k, r; + + assert(s); + + r = parse_env_file(s->state_file, NEWLINE, + "REMOTE", &remote, + "SCOPE", &s->scope, + "SCOPE_JOB", &s->scope_job, + "FIFO", &s->fifo_path, + "SEAT", &seat, + "TTY", &s->tty, + "DISPLAY", &s->display, + "REMOTE_HOST", &s->remote_host, + "REMOTE_USER", &s->remote_user, + "SERVICE", &s->service, + "DESKTOP", &s->desktop, + "VTNR", &vtnr, + "STATE", &state, + "POSITION", &position, + "LEADER", &leader, + "TYPE", &type, + "CLASS", &class, + "UID", &uid, + "REALTIME", &realtime, + "MONOTONIC", &monotonic, + "CONTROLLER", &controller, + NULL); + + if (r < 0) + return log_error_errno(r, "Failed to read %s: %m", s->state_file); + + if (!s->user) { + uid_t u; + User *user; + + if (!uid) { + log_error("UID not specified for session %s", s->id); + return -ENOENT; + } + + r = parse_uid(uid, &u); + if (r < 0) { + log_error("Failed to parse UID value %s for session %s.", uid, s->id); + return r; + } + + user = hashmap_get(s->manager->users, UID_TO_PTR(u)); + if (!user) { + log_error("User of session %s not known.", s->id); + return -ENOENT; + } + + session_set_user(s, user); + } + + if (remote) { + k = parse_boolean(remote); + if (k >= 0) + s->remote = k; + } + + if (vtnr) + safe_atou(vtnr, &s->vtnr); + + if (seat && !s->seat) { + Seat *o; + + o = hashmap_get(s->manager->seats, seat); + if (o) + r = seat_attach_session(o, s); + if (!o || r < 0) + log_error("Cannot attach session %s to seat %s", s->id, seat); + } + + if (!s->seat || !seat_has_vts(s->seat)) + s->vtnr = 0; + + if (position && s->seat) { + unsigned int npos; + + safe_atou(position, &npos); + seat_claim_position(s->seat, s, npos); + } + + if (leader) { + k = parse_pid(leader, &s->leader); + if (k >= 0) + audit_session_from_pid(s->leader, &s->audit_id); + } + + if (type) { + SessionType t; + + t = session_type_from_string(type); + if (t >= 0) + s->type = t; + } + + if (class) { + SessionClass c; + + c = session_class_from_string(class); + if (c >= 0) + s->class = c; + } + + if (state && streq(state, "closing")) + s->stopping = true; + + if (s->fifo_path) { + int fd; + + /* If we open an unopened pipe for reading we will not + get an EOF. to trigger an EOF we hence open it for + writing, but close it right away which then will + trigger the EOF. This will happen immediately if no + other process has the FIFO open for writing, i. e. + when the session died before logind (re)started. */ + + fd = session_create_fifo(s); + safe_close(fd); + } + + if (realtime) + timestamp_deserialize(realtime, &s->timestamp.realtime); + if (monotonic) + timestamp_deserialize(monotonic, &s->timestamp.monotonic); + + if (controller) { + if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0) + session_set_controller(s, controller, false); + else + session_restore_vt(s); + } + + return r; +} + +int session_activate(Session *s) { + unsigned int num_pending; + + assert(s); + assert(s->user); + + if (!s->seat) + return -EOPNOTSUPP; + + if (s->seat->active == s) + return 0; + + /* on seats with VTs, we let VTs manage session-switching */ + if (seat_has_vts(s->seat)) { + if (!s->vtnr) + return -EOPNOTSUPP; + + return chvt(s->vtnr); + } + + /* On seats without VTs, we implement session-switching in logind. We + * try to pause all session-devices and wait until the session + * controller acknowledged them. Once all devices are asleep, we simply + * switch the active session and be done. + * We save the session we want to switch to in seat->pending_switch and + * seat_complete_switch() will perform the final switch. */ + + s->seat->pending_switch = s; + + /* if no devices are running, immediately perform the session switch */ + num_pending = session_device_try_pause_all(s); + if (!num_pending) + seat_complete_switch(s->seat); + + return 0; +} + +static int session_start_scope(Session *s) { + int r; + + assert(s); + assert(s->user); + + if (!s->scope) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + char *scope, *job = NULL; + const char *description; + + scope = strjoin("session-", s->id, ".scope", NULL); + if (!scope) + return log_oom(); + + description = strjoina("Session ", s->id, " of user ", s->user->name); + + r = manager_start_scope( + s->manager, + scope, + s->leader, + s->user->slice, + description, + "systemd-logind.service", + "systemd-user-sessions.service", + (uint64_t) -1, /* disable TasksMax= for the scope, rely on the slice setting for it */ + &error, + &job); + if (r < 0) { + log_error_errno(r, "Failed to start session scope %s: %s", scope, bus_error_message(&error, r)); + free(scope); + return r; + } else { + s->scope = scope; + + free(s->scope_job); + s->scope_job = job; + } + } + + if (s->scope) + (void) hashmap_put(s->manager->session_units, s->scope, s); + + return 0; +} + +int session_start(Session *s) { + int r; + + assert(s); + + if (!s->user) + return -ESTALE; + + if (s->started) + return 0; + + r = user_start(s->user); + if (r < 0) + return r; + + /* Create cgroup */ + r = session_start_scope(s); + if (r < 0) + return r; + + log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, + LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START), + "SESSION_ID=%s", s->id, + "USER_ID=%s", s->user->name, + "LEADER="PID_FMT, s->leader, + LOG_MESSAGE("New session %s of user %s.", s->id, s->user->name), + NULL); + + if (!dual_timestamp_is_set(&s->timestamp)) + dual_timestamp_get(&s->timestamp); + + if (s->seat) + seat_read_active_vt(s->seat); + + s->started = true; + + user_elect_display(s->user); + + /* Save data */ + session_save(s); + user_save(s->user); + if (s->seat) + seat_save(s->seat); + + /* Send signals */ + session_send_signal(s, true); + user_send_changed(s->user, "Sessions", "Display", NULL); + if (s->seat) { + if (s->seat->active == s) + seat_send_changed(s->seat, "Sessions", "ActiveSession", NULL); + else + seat_send_changed(s->seat, "Sessions", NULL); + } + + return 0; +} + +static int session_stop_scope(Session *s, bool force) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + int r; + + assert(s); + + if (!s->scope) + return 0; + + /* Let's always abandon the scope first. This tells systemd that we are not interested anymore, and everything + * that is left in the scope is "left-over". Informing systemd about this has the benefit that it will log + * when killing any processes left after this point. */ + r = manager_abandon_scope(s->manager, s->scope, &error); + if (r < 0) + log_warning_errno(r, "Failed to abandon session scope, ignoring: %s", bus_error_message(&error, r)); + + /* Optionally, let's kill everything that's left now. */ + if (force || manager_shall_kill(s->manager, s->user->name)) { + char *job = NULL; + + r = manager_stop_unit(s->manager, s->scope, &error, &job); + if (r < 0) + return log_error_errno(r, "Failed to stop session scope: %s", bus_error_message(&error, r)); + + free(s->scope_job); + s->scope_job = job; + } else + s->scope_job = mfree(s->scope_job); + + return 0; +} + +int session_stop(Session *s, bool force) { + int r; + + assert(s); + + if (!s->user) + return -ESTALE; + + s->timer_event_source = sd_event_source_unref(s->timer_event_source); + + if (s->seat) + seat_evict_position(s->seat, s); + + /* We are going down, don't care about FIFOs anymore */ + session_remove_fifo(s); + + /* Kill cgroup */ + r = session_stop_scope(s, force); + + s->stopping = true; + + user_elect_display(s->user); + + session_save(s); + user_save(s->user); + + return r; +} + +int session_finalize(Session *s) { + SessionDevice *sd; + + assert(s); + + if (!s->user) + return -ESTALE; + + if (s->started) + log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, + LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP), + "SESSION_ID=%s", s->id, + "USER_ID=%s", s->user->name, + "LEADER="PID_FMT, s->leader, + LOG_MESSAGE("Removed session %s.", s->id), + NULL); + + s->timer_event_source = sd_event_source_unref(s->timer_event_source); + + if (s->seat) + seat_evict_position(s->seat, s); + + /* Kill session devices */ + while ((sd = hashmap_first(s->devices))) + session_device_free(sd); + + (void) unlink(s->state_file); + session_add_to_gc_queue(s); + user_add_to_gc_queue(s->user); + + if (s->started) { + session_send_signal(s, false); + s->started = false; + } + + if (s->seat) { + if (s->seat->active == s) + seat_set_active(s->seat, NULL); + + seat_save(s->seat); + seat_send_changed(s->seat, "Sessions", NULL); + } + + user_save(s->user); + user_send_changed(s->user, "Sessions", "Display", NULL); + + return 0; +} + +static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { + Session *s = userdata; + + assert(es); + assert(s); + + session_stop(s, false); + return 0; +} + +int session_release(Session *s) { + assert(s); + + if (!s->started || s->stopping) + return 0; + + if (s->timer_event_source) + return 0; + + return sd_event_add_time(s->manager->event, + &s->timer_event_source, + CLOCK_MONOTONIC, + now(CLOCK_MONOTONIC) + RELEASE_USEC, 0, + release_timeout_callback, s); +} + +bool session_is_active(Session *s) { + assert(s); + + if (!s->seat) + return true; + + return s->seat->active == s; +} + +static int get_tty_atime(const char *tty, usec_t *atime) { + _cleanup_free_ char *p = NULL; + struct stat st; + + assert(tty); + assert(atime); + + if (!path_is_absolute(tty)) { + p = strappend("/dev/", tty); + if (!p) + return -ENOMEM; + + tty = p; + } else if (!path_startswith(tty, "/dev/")) + return -ENOENT; + + if (lstat(tty, &st) < 0) + return -errno; + + *atime = timespec_load(&st.st_atim); + return 0; +} + +static int get_process_ctty_atime(pid_t pid, usec_t *atime) { + _cleanup_free_ char *p = NULL; + int r; + + assert(pid > 0); + assert(atime); + + r = get_ctty(pid, NULL, &p); + if (r < 0) + return r; + + return get_tty_atime(p, atime); +} + +int session_get_idle_hint(Session *s, dual_timestamp *t) { + usec_t atime = 0, n; + int r; + + assert(s); + + /* Explicit idle hint is set */ + if (s->idle_hint) { + if (t) + *t = s->idle_hint_timestamp; + + return s->idle_hint; + } + + /* Graphical sessions should really implement a real + * idle hint logic */ + if (SESSION_TYPE_IS_GRAPHICAL(s->type)) + goto dont_know; + + /* For sessions with an explicitly configured tty, let's check + * its atime */ + if (s->tty) { + r = get_tty_atime(s->tty, &atime); + if (r >= 0) + goto found_atime; + } + + /* For sessions with a leader but no explicitly configured + * tty, let's check the controlling tty of the leader */ + if (s->leader > 0) { + r = get_process_ctty_atime(s->leader, &atime); + if (r >= 0) + goto found_atime; + } + +dont_know: + if (t) + *t = s->idle_hint_timestamp; + + return 0; + +found_atime: + if (t) + dual_timestamp_from_realtime(t, atime); + + n = now(CLOCK_REALTIME); + + if (s->manager->idle_action_usec <= 0) + return 0; + + return atime + s->manager->idle_action_usec <= n; +} + +void session_set_idle_hint(Session *s, bool b) { + assert(s); + + if (s->idle_hint == b) + return; + + s->idle_hint = b; + dual_timestamp_get(&s->idle_hint_timestamp); + + session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); + + if (s->seat) + seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); + + user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); + manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); +} + +int session_get_locked_hint(Session *s) { + assert(s); + + return s->locked_hint; +} + +void session_set_locked_hint(Session *s, bool b) { + assert(s); + + if (s->locked_hint == b) + return; + + s->locked_hint = b; + + session_send_changed(s, "LockedHint", NULL); +} + +static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { + Session *s = userdata; + + assert(s); + assert(s->fifo_fd == fd); + + /* EOF on the FIFO means the session died abnormally. */ + + session_remove_fifo(s); + session_stop(s, false); + + return 1; +} + +int session_create_fifo(Session *s) { + int r; + + assert(s); + + /* Create FIFO */ + if (!s->fifo_path) { + r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); + if (r < 0) + return r; + + if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0) + return -ENOMEM; + + if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) + return -errno; + } + + /* Open reading side */ + if (s->fifo_fd < 0) { + s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); + if (s->fifo_fd < 0) + return -errno; + + } + + if (!s->fifo_event_source) { + r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); + if (r < 0) + return r; + + /* Let's make sure we noticed dead sessions before we process new bus requests (which might create new + * sessions). */ + r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_NORMAL-10); + if (r < 0) + return r; + } + + /* Open writing side */ + r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); + if (r < 0) + return -errno; + + return r; +} + +static void session_remove_fifo(Session *s) { + assert(s); + + s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); + s->fifo_fd = safe_close(s->fifo_fd); + + if (s->fifo_path) { + unlink(s->fifo_path); + s->fifo_path = mfree(s->fifo_path); + } +} + +bool session_check_gc(Session *s, bool drop_not_started) { + assert(s); + + if (drop_not_started && !s->started) + return false; + + if (!s->user) + return false; + + if (s->fifo_fd >= 0) { + if (pipe_eof(s->fifo_fd) <= 0) + return true; + } + + if (s->scope_job && manager_job_is_active(s->manager, s->scope_job)) + return true; + + if (s->scope && manager_unit_is_active(s->manager, s->scope)) + return true; + + return false; +} + +void session_add_to_gc_queue(Session *s) { + assert(s); + + if (s->in_gc_queue) + return; + + LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); + s->in_gc_queue = true; +} + +SessionState session_get_state(Session *s) { + assert(s); + + /* always check closing first */ + if (s->stopping || s->timer_event_source) + return SESSION_CLOSING; + + if (s->scope_job || s->fifo_fd < 0) + return SESSION_OPENING; + + if (session_is_active(s)) + return SESSION_ACTIVE; + + return SESSION_ONLINE; +} + +int session_kill(Session *s, KillWho who, int signo) { + assert(s); + + if (!s->scope) + return -ESRCH; + + return manager_kill_unit(s->manager, s->scope, who, signo, NULL); +} + +static int session_open_vt(Session *s) { + char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; + + if (s->vtnr < 1) + return -ENODEV; + + if (s->vtfd >= 0) + return s->vtfd; + + sprintf(path, "/dev/tty%u", s->vtnr); + s->vtfd = open_terminal(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); + if (s->vtfd < 0) + return log_error_errno(s->vtfd, "cannot open VT %s of session %s: %m", path, s->id); + + return s->vtfd; +} + +int session_prepare_vt(Session *s) { + int vt, r; + struct vt_mode mode = { 0 }; + + if (s->vtnr < 1) + return 0; + + vt = session_open_vt(s); + if (vt < 0) + return vt; + + r = fchown(vt, s->user->uid, -1); + if (r < 0) { + r = log_error_errno(errno, + "Cannot change owner of /dev/tty%u: %m", + s->vtnr); + goto error; + } + + r = ioctl(vt, KDSKBMODE, K_OFF); + if (r < 0) { + r = log_error_errno(errno, + "Cannot set K_OFF on /dev/tty%u: %m", + s->vtnr); + goto error; + } + + r = ioctl(vt, KDSETMODE, KD_GRAPHICS); + if (r < 0) { + r = log_error_errno(errno, + "Cannot set KD_GRAPHICS on /dev/tty%u: %m", + s->vtnr); + goto error; + } + + /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. + * So we need a dummy handler here which just acknowledges *all* VT + * switch requests. */ + mode.mode = VT_PROCESS; + mode.relsig = SIGRTMIN; + mode.acqsig = SIGRTMIN + 1; + r = ioctl(vt, VT_SETMODE, &mode); + if (r < 0) { + r = log_error_errno(errno, + "Cannot set VT_PROCESS on /dev/tty%u: %m", + s->vtnr); + goto error; + } + + return 0; + +error: + session_restore_vt(s); + return r; +} + +void session_restore_vt(Session *s) { + + static const struct vt_mode mode = { + .mode = VT_AUTO, + }; + + _cleanup_free_ char *utf8 = NULL; + int vt, kb, old_fd; + + /* We need to get a fresh handle to the virtual terminal, + * since the old file-descriptor is potentially in a hung-up + * state after the controlling process exited; we do a + * little dance to avoid having the terminal be available + * for reuse before we've cleaned it up. + */ + old_fd = s->vtfd; + s->vtfd = -1; + + vt = session_open_vt(s); + safe_close(old_fd); + + if (vt < 0) + return; + + (void) ioctl(vt, KDSETMODE, KD_TEXT); + + if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1') + kb = K_UNICODE; + else + kb = K_XLATE; + + (void) ioctl(vt, KDSKBMODE, kb); + + (void) ioctl(vt, VT_SETMODE, &mode); + (void) fchown(vt, 0, (gid_t) -1); + + s->vtfd = safe_close(s->vtfd); +} + +void session_leave_vt(Session *s) { + int r; + + assert(s); + + /* This is called whenever we get a VT-switch signal from the kernel. + * We acknowledge all of them unconditionally. Note that session are + * free to overwrite those handlers and we only register them for + * sessions with controllers. Legacy sessions are not affected. + * However, if we switch from a non-legacy to a legacy session, we must + * make sure to pause all device before acknowledging the switch. We + * process the real switch only after we are notified via sysfs, so the + * legacy session might have already started using the devices. If we + * don't pause the devices before the switch, we might confuse the + * session we switch to. */ + + if (s->vtfd < 0) + return; + + session_device_pause_all(s); + r = ioctl(s->vtfd, VT_RELDISP, 1); + if (r < 0) + log_debug_errno(errno, "Cannot release VT of session %s: %m", s->id); +} + +bool session_is_controller(Session *s, const char *sender) { + assert(s); + + return streq_ptr(s->controller, sender); +} + +static void session_release_controller(Session *s, bool notify) { + _cleanup_free_ char *name = NULL; + SessionDevice *sd; + + if (!s->controller) + return; + + name = s->controller; + + /* By resetting the controller before releasing the devices, we won't + * send notification signals. This avoids sending useless notifications + * if the controller is released on disconnects. */ + if (!notify) + s->controller = NULL; + + while ((sd = hashmap_first(s->devices))) + session_device_free(sd); + + s->controller = NULL; + s->track = sd_bus_track_unref(s->track); +} + +static int on_bus_track(sd_bus_track *track, void *userdata) { + Session *s = userdata; + + assert(track); + assert(s); + + session_drop_controller(s); + + return 0; +} + +int session_set_controller(Session *s, const char *sender, bool force) { + _cleanup_free_ char *name = NULL; + int r; + + assert(s); + assert(sender); + + if (session_is_controller(s, sender)) + return 0; + if (s->controller && !force) + return -EBUSY; + + name = strdup(sender); + if (!name) + return -ENOMEM; + + s->track = sd_bus_track_unref(s->track); + r = sd_bus_track_new(s->manager->bus, &s->track, on_bus_track, s); + if (r < 0) + return r; + + r = sd_bus_track_add_name(s->track, name); + if (r < 0) + return r; + + /* When setting a session controller, we forcibly mute the VT and set + * it into graphics-mode. Applications can override that by changing + * VT state after calling TakeControl(). However, this serves as a good + * default and well-behaving controllers can now ignore VTs entirely. + * Note that we reset the VT on ReleaseControl() and if the controller + * exits. + * If logind crashes/restarts, we restore the controller during restart + * or reset the VT in case it crashed/exited, too. */ + r = session_prepare_vt(s); + if (r < 0) { + s->track = sd_bus_track_unref(s->track); + return r; + } + + session_release_controller(s, true); + s->controller = name; + name = NULL; + session_save(s); + + return 0; +} + +void session_drop_controller(Session *s) { + assert(s); + + if (!s->controller) + return; + + s->track = sd_bus_track_unref(s->track); + session_release_controller(s, false); + session_save(s); + session_restore_vt(s); +} + +static const char* const session_state_table[_SESSION_STATE_MAX] = { + [SESSION_OPENING] = "opening", + [SESSION_ONLINE] = "online", + [SESSION_ACTIVE] = "active", + [SESSION_CLOSING] = "closing" +}; + +DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); + +static const char* const session_type_table[_SESSION_TYPE_MAX] = { + [SESSION_UNSPECIFIED] = "unspecified", + [SESSION_TTY] = "tty", + [SESSION_X11] = "x11", + [SESSION_WAYLAND] = "wayland", + [SESSION_MIR] = "mir", + [SESSION_WEB] = "web", +}; + +DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); + +static const char* const session_class_table[_SESSION_CLASS_MAX] = { + [SESSION_USER] = "user", + [SESSION_GREETER] = "greeter", + [SESSION_LOCK_SCREEN] = "lock-screen", + [SESSION_BACKGROUND] = "background" +}; + +DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); + +static const char* const kill_who_table[_KILL_WHO_MAX] = { + [KILL_LEADER] = "leader", + [KILL_ALL] = "all" +}; + +DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); diff --git a/src/grp-login/systemd-logind/logind-session.h b/src/grp-login/systemd-logind/logind-session.h new file mode 100644 index 0000000000..9b836aacd2 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-session.h @@ -0,0 +1,186 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "systemd-basic/list.h" +#include "systemd-basic/login-util.h" + +typedef enum KillWho KillWho; +typedef struct Session Session; + +#include "logind-user.h" + +typedef enum SessionState { + SESSION_OPENING, /* Session scope is being created */ + SESSION_ONLINE, /* Logged in */ + SESSION_ACTIVE, /* Logged in and in the fg */ + SESSION_CLOSING, /* Logged out, but scope is still there */ + _SESSION_STATE_MAX, + _SESSION_STATE_INVALID = -1 +} SessionState; + +typedef enum SessionClass { + SESSION_USER, + SESSION_GREETER, + SESSION_LOCK_SCREEN, + SESSION_BACKGROUND, + _SESSION_CLASS_MAX, + _SESSION_CLASS_INVALID = -1 +} SessionClass; + +typedef enum SessionType { + SESSION_UNSPECIFIED, + SESSION_TTY, + SESSION_X11, + SESSION_WAYLAND, + SESSION_MIR, + SESSION_WEB, + _SESSION_TYPE_MAX, + _SESSION_TYPE_INVALID = -1 +} SessionType; + +#define SESSION_TYPE_IS_GRAPHICAL(type) IN_SET(type, SESSION_X11, SESSION_WAYLAND, SESSION_MIR) + +enum KillWho { + KILL_LEADER, + KILL_ALL, + _KILL_WHO_MAX, + _KILL_WHO_INVALID = -1 +}; + +struct Session { + Manager *manager; + + const char *id; + unsigned int position; + SessionType type; + SessionClass class; + + char *state_file; + + User *user; + + dual_timestamp timestamp; + + char *tty; + char *display; + + bool remote; + char *remote_user; + char *remote_host; + char *service; + char *desktop; + + char *scope; + char *scope_job; + + Seat *seat; + unsigned int vtnr; + int vtfd; + + pid_t leader; + uint32_t audit_id; + + int fifo_fd; + char *fifo_path; + + sd_event_source *fifo_event_source; + + bool idle_hint; + dual_timestamp idle_hint_timestamp; + + bool locked_hint; + + bool in_gc_queue:1; + bool started:1; + bool stopping:1; + + sd_bus_message *create_message; + + sd_event_source *timer_event_source; + + char *controller; + Hashmap *devices; + sd_bus_track *track; + + LIST_FIELDS(Session, sessions_by_user); + LIST_FIELDS(Session, sessions_by_seat); + + LIST_FIELDS(Session, gc_queue); +}; + +Session *session_new(Manager *m, const char *id); +void session_free(Session *s); +void session_set_user(Session *s, User *u); +bool session_check_gc(Session *s, bool drop_not_started); +void session_add_to_gc_queue(Session *s); +int session_activate(Session *s); +bool session_is_active(Session *s); +int session_get_idle_hint(Session *s, dual_timestamp *t); +void session_set_idle_hint(Session *s, bool b); +int session_get_locked_hint(Session *s); +void session_set_locked_hint(Session *s, bool b); +int session_create_fifo(Session *s); +int session_start(Session *s); +int session_stop(Session *s, bool force); +int session_finalize(Session *s); +int session_release(Session *s); +int session_save(Session *s); +int session_load(Session *s); +int session_kill(Session *s, KillWho who, int signo); + +SessionState session_get_state(Session *u); + +extern const sd_bus_vtable session_vtable[]; +int session_node_enumerator(sd_bus *bus, const char *path,void *userdata, char ***nodes, sd_bus_error *error); +int session_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error); +char *session_bus_path(Session *s); + +int session_send_signal(Session *s, bool new_session); +int session_send_changed(Session *s, const char *properties, ...) _sentinel_; +int session_send_lock(Session *s, bool lock); +int session_send_lock_all(Manager *m, bool lock); + +int session_send_create_reply(Session *s, sd_bus_error *error); + +const char* session_state_to_string(SessionState t) _const_; +SessionState session_state_from_string(const char *s) _pure_; + +const char* session_type_to_string(SessionType t) _const_; +SessionType session_type_from_string(const char *s) _pure_; + +const char* session_class_to_string(SessionClass t) _const_; +SessionClass session_class_from_string(const char *s) _pure_; + +const char *kill_who_to_string(KillWho k) _const_; +KillWho kill_who_from_string(const char *s) _pure_; + +int session_prepare_vt(Session *s); +void session_restore_vt(Session *s); +void session_leave_vt(Session *s); + +bool session_is_controller(Session *s, const char *sender); +int session_set_controller(Session *s, const char *sender, bool force); +void session_drop_controller(Session *s); + +int bus_session_method_activate(sd_bus_message *message, void *userdata, sd_bus_error *error); +int bus_session_method_lock(sd_bus_message *message, void *userdata, sd_bus_error *error); +int bus_session_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error); +int bus_session_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error); diff --git a/src/grp-login/systemd-logind/logind-user-dbus.c b/src/grp-login/systemd-logind/logind-user-dbus.c new file mode 100644 index 0000000000..73e44f8e61 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-user-dbus.c @@ -0,0 +1,399 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <string.h> + +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/signal-util.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/user-util.h" + +#include "logind-user.h" +#include "logind.h" + +static int property_get_display( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + _cleanup_free_ char *p = NULL; + User *u = userdata; + + assert(bus); + assert(reply); + assert(u); + + p = u->display ? session_bus_path(u->display) : strdup("/"); + if (!p) + return -ENOMEM; + + return sd_bus_message_append(reply, "(so)", u->display ? u->display->id : "", p); +} + +static int property_get_state( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + + assert(bus); + assert(reply); + assert(u); + + return sd_bus_message_append(reply, "s", user_state_to_string(user_get_state(u))); +} + +static int property_get_sessions( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + Session *session; + int r; + + assert(bus); + assert(reply); + assert(u); + + r = sd_bus_message_open_container(reply, 'a', "(so)"); + if (r < 0) + return r; + + LIST_FOREACH(sessions_by_user, session, u->sessions) { + _cleanup_free_ char *p = NULL; + + p = session_bus_path(session); + if (!p) + return -ENOMEM; + + r = sd_bus_message_append(reply, "(so)", session->id, p); + if (r < 0) + return r; + + } + + return sd_bus_message_close_container(reply); +} + +static int property_get_idle_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + + assert(bus); + assert(reply); + assert(u); + + return sd_bus_message_append(reply, "b", user_get_idle_hint(u, NULL) > 0); +} + +static int property_get_idle_since_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + dual_timestamp t = DUAL_TIMESTAMP_NULL; + uint64_t k; + + assert(bus); + assert(reply); + assert(u); + + user_get_idle_hint(u, &t); + k = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; + + return sd_bus_message_append(reply, "t", k); +} + +static int property_get_linger( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + User *u = userdata; + int r; + + assert(bus); + assert(reply); + assert(u); + + r = user_check_linger_file(u); + + return sd_bus_message_append(reply, "b", r > 0); +} + +int bus_user_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) { + User *u = userdata; + int r; + + assert(message); + assert(u); + + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + u->uid, + &u->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = user_stop(u, true); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_user_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) { + User *u = userdata; + int32_t signo; + int r; + + assert(message); + assert(u); + + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + u->uid, + &u->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = sd_bus_message_read(message, "i", &signo); + if (r < 0) + return r; + + if (!SIGNAL_VALID(signo)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo); + + r = user_kill(u, signo); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +const sd_bus_vtable user_vtable[] = { + SD_BUS_VTABLE_START(0), + + SD_BUS_PROPERTY("UID", "u", bus_property_get_uid, offsetof(User, uid), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("GID", "u", bus_property_get_gid, offsetof(User, gid), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Name", "s", NULL, offsetof(User, name), SD_BUS_VTABLE_PROPERTY_CONST), + BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(User, timestamp), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("RuntimePath", "s", NULL, offsetof(User, runtime_path), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Service", "s", NULL, offsetof(User, service), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Slice", "s", NULL, offsetof(User, slice), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Display", "(so)", property_get_display, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0), + SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, 0), + SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("Linger", "b", property_get_linger, 0, 0), + + SD_BUS_METHOD("Terminate", NULL, NULL, bus_user_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Kill", "i", NULL, bus_user_method_kill, SD_BUS_VTABLE_UNPRIVILEGED), + + SD_BUS_VTABLE_END +}; + +int user_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { + Manager *m = userdata; + uid_t uid; + User *user; + int r; + + assert(bus); + assert(path); + assert(interface); + assert(found); + assert(m); + + if (streq(path, "/org/freedesktop/login1/user/self")) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + sd_bus_message *message; + + message = sd_bus_get_current_message(bus); + if (!message) + return 0; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_owner_uid(creds, &uid); + } else { + const char *p; + + p = startswith(path, "/org/freedesktop/login1/user/_"); + if (!p) + return 0; + + r = parse_uid(p, &uid); + } + if (r < 0) + return 0; + + user = hashmap_get(m->users, UID_TO_PTR(uid)); + if (!user) + return 0; + + *found = user; + return 1; +} + +char *user_bus_path(User *u) { + char *s; + + assert(u); + + if (asprintf(&s, "/org/freedesktop/login1/user/_"UID_FMT, u->uid) < 0) + return NULL; + + return s; +} + +int user_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { + _cleanup_strv_free_ char **l = NULL; + sd_bus_message *message; + Manager *m = userdata; + User *user; + Iterator i; + int r; + + assert(bus); + assert(path); + assert(nodes); + + HASHMAP_FOREACH(user, m->users, i) { + char *p; + + p = user_bus_path(user); + if (!p) + return -ENOMEM; + + r = strv_consume(&l, p); + if (r < 0) + return r; + } + + message = sd_bus_get_current_message(bus); + if (message) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + uid_t uid; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); + if (r >= 0) { + r = sd_bus_creds_get_owner_uid(creds, &uid); + if (r >= 0) { + user = hashmap_get(m->users, UID_TO_PTR(uid)); + if (user) { + r = strv_extend(&l, "/org/freedesktop/login1/user/self"); + if (r < 0) + return r; + } + } + } + } + + *nodes = l; + l = NULL; + + return 1; +} + +int user_send_signal(User *u, bool new_user) { + _cleanup_free_ char *p = NULL; + + assert(u); + + p = user_bus_path(u); + if (!p) + return -ENOMEM; + + return sd_bus_emit_signal( + u->manager->bus, + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + new_user ? "UserNew" : "UserRemoved", + "uo", (uint32_t) u->uid, p); +} + +int user_send_changed(User *u, const char *properties, ...) { + _cleanup_free_ char *p = NULL; + char **l; + + assert(u); + + if (!u->started) + return 0; + + p = user_bus_path(u); + if (!p) + return -ENOMEM; + + l = strv_from_stdarg_alloca(properties); + + return sd_bus_emit_properties_changed_strv(u->manager->bus, p, "org.freedesktop.login1.User", l); +} diff --git a/src/grp-login/systemd-logind/logind-user.c b/src/grp-login/systemd-logind/logind-user.c new file mode 100644 index 0000000000..0308a78d42 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-user.c @@ -0,0 +1,931 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <string.h> +#include <sys/mount.h> +#include <unistd.h> + +#include "sd-bus/bus-common-errors.h" +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/cgroup-util.h" +#include "systemd-basic/escape.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/fs-util.h" +#include "systemd-basic/hashmap.h" +#include "systemd-basic/label.h" +#include "systemd-basic/mkdir.h" +#include "systemd-basic/mount-util.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/path-util.h" +#include "systemd-basic/rm-rf.h" +#include "systemd-basic/smack-util.h" +#include "systemd-basic/special.h" +#include "systemd-basic/stdio-util.h" +#include "systemd-basic/string-table.h" +#include "systemd-basic/unit-name.h" +#include "systemd-basic/user-util.h" +#include "systemd-basic/util.h" +#include "systemd-shared/clean-ipc.h" +#include "systemd-shared/conf-parser.h" + +#include "logind-user.h" + +int user_new(User **out, Manager *m, uid_t uid, gid_t gid, const char *name) { + _cleanup_(user_freep) User *u = NULL; + char lu[DECIMAL_STR_MAX(uid_t) + 1]; + int r; + + assert(out); + assert(m); + assert(name); + + u = new0(User, 1); + if (!u) + return -ENOMEM; + + u->manager = m; + u->uid = uid; + u->gid = gid; + xsprintf(lu, UID_FMT, uid); + + u->name = strdup(name); + if (!u->name) + return -ENOMEM; + + if (asprintf(&u->state_file, "/run/systemd/users/"UID_FMT, uid) < 0) + return -ENOMEM; + + if (asprintf(&u->runtime_path, "/run/user/"UID_FMT, uid) < 0) + return -ENOMEM; + + r = slice_build_subslice(SPECIAL_USER_SLICE, lu, &u->slice); + if (r < 0) + return r; + + r = unit_name_build("user", lu, ".service", &u->service); + if (r < 0) + return r; + + r = hashmap_put(m->users, UID_TO_PTR(uid), u); + if (r < 0) + return r; + + r = hashmap_put(m->user_units, u->slice, u); + if (r < 0) + return r; + + r = hashmap_put(m->user_units, u->service, u); + if (r < 0) + return r; + + *out = u; + u = NULL; + return 0; +} + +User *user_free(User *u) { + if (!u) + return NULL; + + if (u->in_gc_queue) + LIST_REMOVE(gc_queue, u->manager->user_gc_queue, u); + + while (u->sessions) + session_free(u->sessions); + + if (u->service) + hashmap_remove_value(u->manager->user_units, u->service, u); + + if (u->slice) + hashmap_remove_value(u->manager->user_units, u->slice, u); + + hashmap_remove_value(u->manager->users, UID_TO_PTR(u->uid), u); + + u->slice_job = mfree(u->slice_job); + u->service_job = mfree(u->service_job); + + u->service = mfree(u->service); + u->slice = mfree(u->slice); + u->runtime_path = mfree(u->runtime_path); + u->state_file = mfree(u->state_file); + u->name = mfree(u->name); + + return mfree(u); +} + +static int user_save_internal(User *u) { + _cleanup_free_ char *temp_path = NULL; + _cleanup_fclose_ FILE *f = NULL; + int r; + + assert(u); + assert(u->state_file); + + r = mkdir_safe_label("/run/systemd/users", 0755, 0, 0); + if (r < 0) + goto fail; + + r = fopen_temporary(u->state_file, &f, &temp_path); + if (r < 0) + goto fail; + + fchmod(fileno(f), 0644); + + fprintf(f, + "# This is private data. Do not parse.\n" + "NAME=%s\n" + "STATE=%s\n", + u->name, + user_state_to_string(user_get_state(u))); + + /* LEGACY: no-one reads RUNTIME= anymore, drop it at some point */ + if (u->runtime_path) + fprintf(f, "RUNTIME=%s\n", u->runtime_path); + + if (u->service_job) + fprintf(f, "SERVICE_JOB=%s\n", u->service_job); + + if (u->slice_job) + fprintf(f, "SLICE_JOB=%s\n", u->slice_job); + + if (u->display) + fprintf(f, "DISPLAY=%s\n", u->display->id); + + if (dual_timestamp_is_set(&u->timestamp)) + fprintf(f, + "REALTIME="USEC_FMT"\n" + "MONOTONIC="USEC_FMT"\n", + u->timestamp.realtime, + u->timestamp.monotonic); + + if (u->sessions) { + Session *i; + bool first; + + fputs("SESSIONS=", f); + first = true; + LIST_FOREACH(sessions_by_user, i, u->sessions) { + if (first) + first = false; + else + fputc(' ', f); + + fputs(i->id, f); + } + + fputs("\nSEATS=", f); + first = true; + LIST_FOREACH(sessions_by_user, i, u->sessions) { + if (!i->seat) + continue; + + if (first) + first = false; + else + fputc(' ', f); + + fputs(i->seat->id, f); + } + + fputs("\nACTIVE_SESSIONS=", f); + first = true; + LIST_FOREACH(sessions_by_user, i, u->sessions) { + if (!session_is_active(i)) + continue; + + if (first) + first = false; + else + fputc(' ', f); + + fputs(i->id, f); + } + + fputs("\nONLINE_SESSIONS=", f); + first = true; + LIST_FOREACH(sessions_by_user, i, u->sessions) { + if (session_get_state(i) == SESSION_CLOSING) + continue; + + if (first) + first = false; + else + fputc(' ', f); + + fputs(i->id, f); + } + + fputs("\nACTIVE_SEATS=", f); + first = true; + LIST_FOREACH(sessions_by_user, i, u->sessions) { + if (!session_is_active(i) || !i->seat) + continue; + + if (first) + first = false; + else + fputc(' ', f); + + fputs(i->seat->id, f); + } + + fputs("\nONLINE_SEATS=", f); + first = true; + LIST_FOREACH(sessions_by_user, i, u->sessions) { + if (session_get_state(i) == SESSION_CLOSING || !i->seat) + continue; + + if (first) + first = false; + else + fputc(' ', f); + + fputs(i->seat->id, f); + } + fputc('\n', f); + } + + r = fflush_and_check(f); + if (r < 0) + goto fail; + + if (rename(temp_path, u->state_file) < 0) { + r = -errno; + goto fail; + } + + return 0; + +fail: + (void) unlink(u->state_file); + + if (temp_path) + (void) unlink(temp_path); + + return log_error_errno(r, "Failed to save user data %s: %m", u->state_file); +} + +int user_save(User *u) { + assert(u); + + if (!u->started) + return 0; + + return user_save_internal (u); +} + +int user_load(User *u) { + _cleanup_free_ char *display = NULL, *realtime = NULL, *monotonic = NULL; + Session *s = NULL; + int r; + + assert(u); + + r = parse_env_file(u->state_file, NEWLINE, + "SERVICE_JOB", &u->service_job, + "SLICE_JOB", &u->slice_job, + "DISPLAY", &display, + "REALTIME", &realtime, + "MONOTONIC", &monotonic, + NULL); + if (r < 0) { + if (r == -ENOENT) + return 0; + + return log_error_errno(r, "Failed to read %s: %m", u->state_file); + } + + if (display) + s = hashmap_get(u->manager->sessions, display); + + if (s && s->display && display_is_local(s->display)) + u->display = s; + + if (realtime) + timestamp_deserialize(realtime, &u->timestamp.realtime); + if (monotonic) + timestamp_deserialize(monotonic, &u->timestamp.monotonic); + + return r; +} + +static int user_mkdir_runtime_path(User *u) { + int r; + + assert(u); + + r = mkdir_safe_label("/run/user", 0755, 0, 0); + if (r < 0) + return log_error_errno(r, "Failed to create /run/user: %m"); + + if (path_is_mount_point(u->runtime_path, 0) <= 0) { + _cleanup_free_ char *t = NULL; + + (void) mkdir_label(u->runtime_path, 0700); + + if (mac_smack_use()) + r = asprintf(&t, "mode=0700,smackfsroot=*,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size); + else + r = asprintf(&t, "mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size); + if (r < 0) { + r = log_oom(); + goto fail; + } + + r = mount("tmpfs", u->runtime_path, "tmpfs", MS_NODEV|MS_NOSUID, t); + if (r < 0) { + if (errno != EPERM && errno != EACCES) { + r = log_error_errno(errno, "Failed to mount per-user tmpfs directory %s: %m", u->runtime_path); + goto fail; + } + + log_debug_errno(errno, "Failed to mount per-user tmpfs directory %s, assuming containerized execution, ignoring: %m", u->runtime_path); + + r = chmod_and_chown(u->runtime_path, 0700, u->uid, u->gid); + if (r < 0) { + log_error_errno(r, "Failed to change runtime directory ownership and mode: %m"); + goto fail; + } + } + + r = label_fix(u->runtime_path, false, false); + if (r < 0) + log_warning_errno(r, "Failed to fix label of '%s', ignoring: %m", u->runtime_path); + } + + return 0; + +fail: + /* Try to clean up, but ignore errors */ + (void) rmdir(u->runtime_path); + return r; +} + +static int user_start_slice(User *u) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + const char *description; + char *job; + int r; + + assert(u); + + u->slice_job = mfree(u->slice_job); + description = strjoina("User Slice of ", u->name); + + r = manager_start_slice( + u->manager, + u->slice, + description, + "systemd-logind.service", + "systemd-user-sessions.service", + u->manager->user_tasks_max, + &error, + &job); + if (r >= 0) + u->slice_job = job; + else if (!sd_bus_error_has_name(&error, BUS_ERROR_UNIT_EXISTS)) + /* we don't fail due to this, let's try to continue */ + log_error_errno(r, "Failed to start user slice %s, ignoring: %s (%s)", + u->slice, bus_error_message(&error, r), error.name); + + return 0; +} + +static int user_start_service(User *u) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + char *job; + int r; + + assert(u); + + u->service_job = mfree(u->service_job); + + r = manager_start_unit( + u->manager, + u->service, + &error, + &job); + if (r < 0) { + /* we don't fail due to this, let's try to continue */ + log_error_errno(r, "Failed to start user service, ignoring: %s", bus_error_message(&error, r)); + } else { + u->service_job = job; + } + + return 0; +} + +int user_start(User *u) { + int r; + + assert(u); + + if (u->started && !u->stopping) + return 0; + + /* + * If u->stopping is set, the user is marked for removal and the slice + * and service stop-jobs are queued. We have to clear that flag before + * queing the start-jobs again. If they succeed, the user object can be + * re-used just fine (pid1 takes care of job-ordering and proper + * restart), but if they fail, we want to force another user_stop() so + * possibly pending units are stopped. + * Note that we don't clear u->started, as we have no clue what state + * the user is in on failure here. Hence, we pretend the user is + * running so it will be properly taken down by GC. However, we clearly + * return an error from user_start() in that case, so no further + * reference to the user is taken. + */ + u->stopping = false; + + if (!u->started) { + log_debug("New user %s logged in.", u->name); + + /* Make XDG_RUNTIME_DIR */ + r = user_mkdir_runtime_path(u); + if (r < 0) + return r; + } + + /* Create cgroup */ + r = user_start_slice(u); + if (r < 0) + return r; + + /* Save the user data so far, because pam_systemd will read the + * XDG_RUNTIME_DIR out of it while starting up systemd --user. + * We need to do user_save_internal() because we have not + * "officially" started yet. */ + user_save_internal(u); + + /* Spawn user systemd */ + r = user_start_service(u); + if (r < 0) + return r; + + if (!u->started) { + if (!dual_timestamp_is_set(&u->timestamp)) + dual_timestamp_get(&u->timestamp); + user_send_signal(u, true); + u->started = true; + } + + /* Save new user data */ + user_save(u); + + return 0; +} + +static int user_stop_slice(User *u) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + char *job; + int r; + + assert(u); + + r = manager_stop_unit(u->manager, u->slice, &error, &job); + if (r < 0) { + log_error("Failed to stop user slice: %s", bus_error_message(&error, r)); + return r; + } + + free(u->slice_job); + u->slice_job = job; + + return r; +} + +static int user_stop_service(User *u) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + char *job; + int r; + + assert(u); + + r = manager_stop_unit(u->manager, u->service, &error, &job); + if (r < 0) { + log_error("Failed to stop user service: %s", bus_error_message(&error, r)); + return r; + } + + free(u->service_job); + u->service_job = job; + + return r; +} + +static int user_remove_runtime_path(User *u) { + int r; + + assert(u); + + r = rm_rf(u->runtime_path, 0); + if (r < 0) + log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path); + + /* Ignore cases where the directory isn't mounted, as that's + * quite possible, if we lacked the permissions to mount + * something */ + r = umount2(u->runtime_path, MNT_DETACH); + if (r < 0 && errno != EINVAL && errno != ENOENT) + log_error_errno(errno, "Failed to unmount user runtime directory %s: %m", u->runtime_path); + + r = rm_rf(u->runtime_path, REMOVE_ROOT); + if (r < 0) + log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path); + + return r; +} + +int user_stop(User *u, bool force) { + Session *s; + int r = 0, k; + assert(u); + + /* Stop jobs have already been queued */ + if (u->stopping) { + user_save(u); + return r; + } + + LIST_FOREACH(sessions_by_user, s, u->sessions) { + k = session_stop(s, force); + if (k < 0) + r = k; + } + + /* Kill systemd */ + k = user_stop_service(u); + if (k < 0) + r = k; + + /* Kill cgroup */ + k = user_stop_slice(u); + if (k < 0) + r = k; + + u->stopping = true; + + user_save(u); + + return r; +} + +int user_finalize(User *u) { + Session *s; + int r = 0, k; + + assert(u); + + if (u->started) + log_debug("User %s logged out.", u->name); + + LIST_FOREACH(sessions_by_user, s, u->sessions) { + k = session_finalize(s); + if (k < 0) + r = k; + } + + /* Kill XDG_RUNTIME_DIR */ + k = user_remove_runtime_path(u); + if (k < 0) + r = k; + + /* Clean SysV + POSIX IPC objects, but only if this is not a system user. Background: in many setups cronjobs + * are run in full PAM and thus logind sessions, even if the code run doesn't belong to actual users but to + * system components. Since enable RemoveIPC= globally for all users, we need to be a bit careful with such + * cases, as we shouldn't accidentally remove a system service's IPC objects while it is running, just because + * a cronjob running as the same user just finished. Hence: exclude system users generally from IPC clean-up, + * and do it only for normal users. */ + if (u->manager->remove_ipc && u->uid > SYSTEM_UID_MAX) { + k = clean_ipc_by_uid(u->uid); + if (k < 0) + r = k; + } + + unlink(u->state_file); + user_add_to_gc_queue(u); + + if (u->started) { + user_send_signal(u, false); + u->started = false; + } + + return r; +} + +int user_get_idle_hint(User *u, dual_timestamp *t) { + Session *s; + bool idle_hint = true; + dual_timestamp ts = DUAL_TIMESTAMP_NULL; + + assert(u); + + LIST_FOREACH(sessions_by_user, s, u->sessions) { + dual_timestamp k; + int ih; + + ih = session_get_idle_hint(s, &k); + if (ih < 0) + return ih; + + if (!ih) { + if (!idle_hint) { + if (k.monotonic < ts.monotonic) + ts = k; + } else { + idle_hint = false; + ts = k; + } + } else if (idle_hint) { + + if (k.monotonic > ts.monotonic) + ts = k; + } + } + + if (t) + *t = ts; + + return idle_hint; +} + +int user_check_linger_file(User *u) { + _cleanup_free_ char *cc = NULL; + char *p = NULL; + + cc = cescape(u->name); + if (!cc) + return -ENOMEM; + + p = strjoina("/var/lib/systemd/linger/", cc); + + return access(p, F_OK) >= 0; +} + +bool user_check_gc(User *u, bool drop_not_started) { + assert(u); + + if (drop_not_started && !u->started) + return false; + + if (u->sessions) + return true; + + if (user_check_linger_file(u) > 0) + return true; + + if (u->slice_job && manager_job_is_active(u->manager, u->slice_job)) + return true; + + if (u->service_job && manager_job_is_active(u->manager, u->service_job)) + return true; + + return false; +} + +void user_add_to_gc_queue(User *u) { + assert(u); + + if (u->in_gc_queue) + return; + + LIST_PREPEND(gc_queue, u->manager->user_gc_queue, u); + u->in_gc_queue = true; +} + +UserState user_get_state(User *u) { + Session *i; + + assert(u); + + if (u->stopping) + return USER_CLOSING; + + if (!u->started || u->slice_job || u->service_job) + return USER_OPENING; + + if (u->sessions) { + bool all_closing = true; + + LIST_FOREACH(sessions_by_user, i, u->sessions) { + SessionState state; + + state = session_get_state(i); + if (state == SESSION_ACTIVE) + return USER_ACTIVE; + if (state != SESSION_CLOSING) + all_closing = false; + } + + return all_closing ? USER_CLOSING : USER_ONLINE; + } + + if (user_check_linger_file(u) > 0) + return USER_LINGERING; + + return USER_CLOSING; +} + +int user_kill(User *u, int signo) { + assert(u); + + return manager_kill_unit(u->manager, u->slice, KILL_ALL, signo, NULL); +} + +static bool elect_display_filter(Session *s) { + /* Return true if the session is a candidate for the user’s ‘primary + * session’ or ‘display’. */ + assert(s); + + return (s->class == SESSION_USER && !s->stopping); +} + +static int elect_display_compare(Session *s1, Session *s2) { + /* Indexed by SessionType. Lower numbers mean more preferred. */ + const int type_ranks[_SESSION_TYPE_MAX] = { + [SESSION_UNSPECIFIED] = 0, + [SESSION_TTY] = -2, + [SESSION_X11] = -3, + [SESSION_WAYLAND] = -3, + [SESSION_MIR] = -3, + [SESSION_WEB] = -1, + }; + + /* Calculate the partial order relationship between s1 and s2, + * returning < 0 if s1 is preferred as the user’s ‘primary session’, + * 0 if s1 and s2 are equally preferred or incomparable, or > 0 if s2 + * is preferred. + * + * s1 or s2 may be NULL. */ + if (!s1 && !s2) + return 0; + + if ((s1 == NULL) != (s2 == NULL)) + return (s1 == NULL) - (s2 == NULL); + + if (s1->stopping != s2->stopping) + return s1->stopping - s2->stopping; + + if ((s1->class != SESSION_USER) != (s2->class != SESSION_USER)) + return (s1->class != SESSION_USER) - (s2->class != SESSION_USER); + + if ((s1->type == _SESSION_TYPE_INVALID) != (s2->type == _SESSION_TYPE_INVALID)) + return (s1->type == _SESSION_TYPE_INVALID) - (s2->type == _SESSION_TYPE_INVALID); + + if (s1->type != s2->type) + return type_ranks[s1->type] - type_ranks[s2->type]; + + return 0; +} + +void user_elect_display(User *u) { + Session *s; + + assert(u); + + /* This elects a primary session for each user, which we call + * the "display". We try to keep the assignment stable, but we + * "upgrade" to better choices. */ + log_debug("Electing new display for user %s", u->name); + + LIST_FOREACH(sessions_by_user, s, u->sessions) { + if (!elect_display_filter(s)) { + log_debug("Ignoring session %s", s->id); + continue; + } + + if (elect_display_compare(s, u->display) < 0) { + log_debug("Choosing session %s in preference to %s", s->id, u->display ? u->display->id : "-"); + u->display = s; + } + } +} + +static const char* const user_state_table[_USER_STATE_MAX] = { + [USER_OFFLINE] = "offline", + [USER_OPENING] = "opening", + [USER_LINGERING] = "lingering", + [USER_ONLINE] = "online", + [USER_ACTIVE] = "active", + [USER_CLOSING] = "closing" +}; + +DEFINE_STRING_TABLE_LOOKUP(user_state, UserState); + +int config_parse_tmpfs_size( + const char* unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + size_t *sz = data; + int r; + + assert(filename); + assert(lvalue); + assert(rvalue); + assert(data); + + /* First, try to parse as percentage */ + r = parse_percent(rvalue); + if (r > 0 && r < 100) + *sz = physical_memory_scale(r, 100U); + else { + uint64_t k; + + /* If the passed argument was not a percentage, or out of range, parse as byte size */ + + r = parse_size(rvalue, 1024, &k); + if (r < 0 || k <= 0 || (uint64_t) (size_t) k != k) { + log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue); + return 0; + } + + *sz = PAGE_ALIGN((size_t) k); + } + + return 0; +} + +int config_parse_user_tasks_max( + const char* unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + uint64_t *m = data; + uint64_t k; + int r; + + assert(filename); + assert(lvalue); + assert(rvalue); + assert(data); + + if (isempty(rvalue)) { + *m = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U); + return 0; + } + + if (streq(rvalue, "infinity")) { + *m = CGROUP_LIMIT_MAX; + return 0; + } + + /* Try to parse as percentage */ + r = parse_percent(rvalue); + if (r >= 0) + k = system_tasks_max_scale(r, 100U); + else { + + /* If the passed argument was not a percentage, or out of range, parse as byte size */ + + r = safe_atou64(rvalue, &k); + if (r < 0) { + log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse tasks maximum, ignoring: %s", rvalue); + return 0; + } + } + + if (k <= 0 || k >= UINT64_MAX) { + log_syntax(unit, LOG_ERR, filename, line, 0, "Tasks maximum out of range, ignoring: %s", rvalue); + return 0; + } + + *m = k; + return 0; +} diff --git a/src/grp-login/systemd-logind/logind-user.h b/src/grp-login/systemd-logind/logind-user.h new file mode 100644 index 0000000000..d93223f6ad --- /dev/null +++ b/src/grp-login/systemd-logind/logind-user.h @@ -0,0 +1,94 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "systemd-basic/list.h" + +typedef struct User User; + +#include "logind.h" + +typedef enum UserState { + USER_OFFLINE, /* Not logged in at all */ + USER_OPENING, /* Is logging in */ + USER_LINGERING, /* Lingering has been enabled by the admin for this user */ + USER_ONLINE, /* User logged in */ + USER_ACTIVE, /* User logged in and has a session in the fg */ + USER_CLOSING, /* User logged out, but processes still remain and lingering is not enabled */ + _USER_STATE_MAX, + _USER_STATE_INVALID = -1 +} UserState; + +struct User { + Manager *manager; + uid_t uid; + gid_t gid; + char *name; + char *state_file; + char *runtime_path; + char *slice; + char *service; + + char *service_job; + char *slice_job; + + Session *display; + + dual_timestamp timestamp; + + bool in_gc_queue:1; + bool started:1; + bool stopping:1; + + LIST_HEAD(Session, sessions); + LIST_FIELDS(User, gc_queue); +}; + +int user_new(User **out, Manager *m, uid_t uid, gid_t gid, const char *name); +User *user_free(User *u); + +DEFINE_TRIVIAL_CLEANUP_FUNC(User *, user_free); + +bool user_check_gc(User *u, bool drop_not_started); +void user_add_to_gc_queue(User *u); +int user_start(User *u); +int user_stop(User *u, bool force); +int user_finalize(User *u); +UserState user_get_state(User *u); +int user_get_idle_hint(User *u, dual_timestamp *t); +int user_save(User *u); +int user_load(User *u); +int user_kill(User *u, int signo); +int user_check_linger_file(User *u); +void user_elect_display(User *u); + +extern const sd_bus_vtable user_vtable[]; +int user_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error); +int user_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error); +char *user_bus_path(User *s); + +int user_send_signal(User *u, bool new_user); +int user_send_changed(User *u, const char *properties, ...) _sentinel_; + +const char* user_state_to_string(UserState s) _const_; +UserState user_state_from_string(const char *s) _pure_; + +int bus_user_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error); +int bus_user_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error); diff --git a/src/grp-login/systemd-logind/logind-utmp.c b/src/grp-login/systemd-logind/logind-utmp.c new file mode 100644 index 0000000000..319718ca57 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-utmp.c @@ -0,0 +1,184 @@ +/*** + This file is part of systemd. + + Copyright 2015 Daniel Mack + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <pwd.h> +#include <string.h> +#include <unistd.h> + +#include <systemd/sd-messages.h> + +#include "sd-bus/bus-common-errors.h" +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/audit-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/special.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/unit-name.h" +#include "systemd-basic/user-util.h" +#include "systemd-shared/utmp-wtmp.h" + +#include "logind.h" + +_const_ static usec_t when_wall(usec_t n, usec_t elapse) { + + usec_t left; + unsigned int i; + static const int wall_timers[] = { + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, + 25, 40, 55, 70, 100, 130, 150, 180, + }; + + /* If the time is already passed, then don't announce */ + if (n >= elapse) + return 0; + + left = elapse - n; + + for (i = 1; i < ELEMENTSOF(wall_timers); i++) + if (wall_timers[i] * USEC_PER_MINUTE >= left) + return left - wall_timers[i-1] * USEC_PER_MINUTE; + + return left % USEC_PER_HOUR; +} + +bool logind_wall_tty_filter(const char *tty, void *userdata) { + + Manager *m = userdata; + + assert(m); + + if (!startswith(tty, "/dev/") || !m->scheduled_shutdown_tty) + return true; + + return !streq(tty + 5, m->scheduled_shutdown_tty); +} + +static int warn_wall(Manager *m, usec_t n) { + char date[FORMAT_TIMESTAMP_MAX] = {}; + _cleanup_free_ char *l = NULL; + usec_t left; + int r; + + assert(m); + + if (!m->enable_wall_messages) + return 0; + + left = m->scheduled_shutdown_timeout > n; + + r = asprintf(&l, "%s%sThe system is going down for %s %s%s!", + strempty(m->wall_message), + isempty(m->wall_message) ? "" : "\n", + m->scheduled_shutdown_type, + left ? "at " : "NOW", + left ? format_timestamp(date, sizeof(date), m->scheduled_shutdown_timeout) : ""); + if (r < 0) { + log_oom(); + return 0; + } + + utmp_wall(l, uid_to_name(m->scheduled_shutdown_uid), + m->scheduled_shutdown_tty, logind_wall_tty_filter, m); + + return 1; +} + +static int wall_message_timeout_handler( + sd_event_source *s, + uint64_t usec, + void *userdata) { + + Manager *m = userdata; + usec_t n, next; + int r; + + assert(m); + assert(s == m->wall_message_timeout_source); + + n = now(CLOCK_REALTIME); + + r = warn_wall(m, n); + if (r == 0) + return 0; + + next = when_wall(n, m->scheduled_shutdown_timeout); + if (next > 0) { + r = sd_event_source_set_time(s, n + next); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_time() failed. %m"); + + r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_enabled() failed. %m"); + } + + return 0; +} + +int manager_setup_wall_message_timer(Manager *m) { + + usec_t n, elapse; + int r; + + assert(m); + + n = now(CLOCK_REALTIME); + elapse = m->scheduled_shutdown_timeout; + + /* wall message handling */ + + if (isempty(m->scheduled_shutdown_type)) { + warn_wall(m, n); + return 0; + } + + if (elapse < n) + return 0; + + /* Warn immediately if less than 15 minutes are left */ + if (elapse - n < 15 * USEC_PER_MINUTE) { + r = warn_wall(m, n); + if (r == 0) + return 0; + } + + elapse = when_wall(n, elapse); + if (elapse == 0) + return 0; + + if (m->wall_message_timeout_source) { + r = sd_event_source_set_time(m->wall_message_timeout_source, n + elapse); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_time() failed. %m"); + + r = sd_event_source_set_enabled(m->wall_message_timeout_source, SD_EVENT_ONESHOT); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_enabled() failed. %m"); + } else { + r = sd_event_add_time(m->event, &m->wall_message_timeout_source, + CLOCK_REALTIME, n + elapse, 0, wall_message_timeout_handler, m); + if (r < 0) + return log_error_errno(r, "sd_event_add_time() failed. %m"); + } + + return 0; +} diff --git a/src/grp-login/systemd-logind/logind.c b/src/grp-login/systemd-logind/logind.c new file mode 100644 index 0000000000..c95a11f9ea --- /dev/null +++ b/src/grp-login/systemd-logind/logind.c @@ -0,0 +1,1211 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> + +#include <libudev.h> +#include <systemd/sd-daemon.h> + +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/cgroup-util.h" +#include "systemd-basic/def.h" +#include "systemd-basic/dirent-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/selinux-util.h" +#include "systemd-basic/signal-util.h" +#include "systemd-basic/strv.h" +#include "systemd-shared/conf-parser.h" +#include "systemd-shared/udev-util.h" + +#include "logind.h" + +static void manager_free(Manager *m); + +static void manager_reset_config(Manager *m) { + m->n_autovts = 6; + m->reserve_vt = 6; + m->remove_ipc = true; + m->inhibit_delay_max = 5 * USEC_PER_SEC; + m->handle_power_key = HANDLE_POWEROFF; + m->handle_suspend_key = HANDLE_SUSPEND; + m->handle_hibernate_key = HANDLE_HIBERNATE; + m->handle_lid_switch = HANDLE_SUSPEND; + m->handle_lid_switch_docked = HANDLE_IGNORE; + m->power_key_ignore_inhibited = false; + m->suspend_key_ignore_inhibited = false; + m->hibernate_key_ignore_inhibited = false; + m->lid_switch_ignore_inhibited = true; + + m->holdoff_timeout_usec = 30 * USEC_PER_SEC; + + m->idle_action_usec = 30 * USEC_PER_MINUTE; + m->idle_action = HANDLE_IGNORE; + + m->runtime_dir_size = physical_memory_scale(10U, 100U); /* 10% */ + m->user_tasks_max = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U); /* 33% */ + m->sessions_max = 8192; + m->inhibitors_max = 8192; + + m->kill_user_processes = KILL_USER_PROCESSES; + + m->kill_only_users = strv_free(m->kill_only_users); + m->kill_exclude_users = strv_free(m->kill_exclude_users); +} + +static Manager *manager_new(void) { + Manager *m; + int r; + + m = new0(Manager, 1); + if (!m) + return NULL; + + m->console_active_fd = -1; + m->reserve_vt_fd = -1; + + m->idle_action_not_before_usec = now(CLOCK_MONOTONIC); + + m->devices = hashmap_new(&string_hash_ops); + m->seats = hashmap_new(&string_hash_ops); + m->sessions = hashmap_new(&string_hash_ops); + m->users = hashmap_new(NULL); + m->inhibitors = hashmap_new(&string_hash_ops); + m->buttons = hashmap_new(&string_hash_ops); + + m->user_units = hashmap_new(&string_hash_ops); + m->session_units = hashmap_new(&string_hash_ops); + + if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units) + goto fail; + + m->udev = udev_new(); + if (!m->udev) + goto fail; + + r = sd_event_default(&m->event); + if (r < 0) + goto fail; + + sd_event_set_watchdog(m->event, true); + + manager_reset_config(m); + + return m; + +fail: + manager_free(m); + return NULL; +} + +static void manager_free(Manager *m) { + Session *session; + User *u; + Device *d; + Seat *s; + Inhibitor *i; + Button *b; + + if (!m) + return; + + while ((session = hashmap_first(m->sessions))) + session_free(session); + + while ((u = hashmap_first(m->users))) + user_free(u); + + while ((d = hashmap_first(m->devices))) + device_free(d); + + while ((s = hashmap_first(m->seats))) + seat_free(s); + + while ((i = hashmap_first(m->inhibitors))) + inhibitor_free(i); + + while ((b = hashmap_first(m->buttons))) + button_free(b); + + hashmap_free(m->devices); + hashmap_free(m->seats); + hashmap_free(m->sessions); + hashmap_free(m->users); + hashmap_free(m->inhibitors); + hashmap_free(m->buttons); + + hashmap_free(m->user_units); + hashmap_free(m->session_units); + + sd_event_source_unref(m->idle_action_event_source); + sd_event_source_unref(m->inhibit_timeout_source); + sd_event_source_unref(m->scheduled_shutdown_timeout_source); + sd_event_source_unref(m->nologin_timeout_source); + sd_event_source_unref(m->wall_message_timeout_source); + + sd_event_source_unref(m->console_active_event_source); + sd_event_source_unref(m->udev_seat_event_source); + sd_event_source_unref(m->udev_device_event_source); + sd_event_source_unref(m->udev_vcsa_event_source); + sd_event_source_unref(m->udev_button_event_source); + sd_event_source_unref(m->lid_switch_ignore_event_source); + + safe_close(m->console_active_fd); + + udev_monitor_unref(m->udev_seat_monitor); + udev_monitor_unref(m->udev_device_monitor); + udev_monitor_unref(m->udev_vcsa_monitor); + udev_monitor_unref(m->udev_button_monitor); + + udev_unref(m->udev); + + if (m->unlink_nologin) + (void) unlink("/run/nologin"); + + bus_verify_polkit_async_registry_free(m->polkit_registry); + + sd_bus_unref(m->bus); + sd_event_unref(m->event); + + safe_close(m->reserve_vt_fd); + + strv_free(m->kill_only_users); + strv_free(m->kill_exclude_users); + + free(m->scheduled_shutdown_type); + free(m->scheduled_shutdown_tty); + free(m->wall_message); + free(m->action_job); + free(m); +} + +static int manager_enumerate_devices(Manager *m) { + struct udev_list_entry *item = NULL, *first = NULL; + _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; + int r; + + assert(m); + + /* Loads devices from udev and creates seats for them as + * necessary */ + + e = udev_enumerate_new(m->udev); + if (!e) + return -ENOMEM; + + r = udev_enumerate_add_match_tag(e, "master-of-seat"); + if (r < 0) + return r; + + r = udev_enumerate_add_match_is_initialized(e); + if (r < 0) + return r; + + r = udev_enumerate_scan_devices(e); + if (r < 0) + return r; + + first = udev_enumerate_get_list_entry(e); + udev_list_entry_foreach(item, first) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + int k; + + d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); + if (!d) + return -ENOMEM; + + k = manager_process_seat_device(m, d); + if (k < 0) + r = k; + } + + return r; +} + +static int manager_enumerate_buttons(Manager *m) { + _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; + struct udev_list_entry *item = NULL, *first = NULL; + int r; + + assert(m); + + /* Loads buttons from udev */ + + if (m->handle_power_key == HANDLE_IGNORE && + m->handle_suspend_key == HANDLE_IGNORE && + m->handle_hibernate_key == HANDLE_IGNORE && + m->handle_lid_switch == HANDLE_IGNORE && + m->handle_lid_switch_docked == HANDLE_IGNORE) + return 0; + + e = udev_enumerate_new(m->udev); + if (!e) + return -ENOMEM; + + r = udev_enumerate_add_match_subsystem(e, "input"); + if (r < 0) + return r; + + r = udev_enumerate_add_match_tag(e, "power-switch"); + if (r < 0) + return r; + + r = udev_enumerate_add_match_is_initialized(e); + if (r < 0) + return r; + + r = udev_enumerate_scan_devices(e); + if (r < 0) + return r; + + first = udev_enumerate_get_list_entry(e); + udev_list_entry_foreach(item, first) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + int k; + + d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); + if (!d) + return -ENOMEM; + + k = manager_process_button_device(m, d); + if (k < 0) + r = k; + } + + return r; +} + +static int manager_enumerate_seats(Manager *m) { + _cleanup_closedir_ DIR *d = NULL; + struct dirent *de; + int r = 0; + + assert(m); + + /* This loads data about seats stored on disk, but does not + * actually create any seats. Removes data of seats that no + * longer exist. */ + + d = opendir("/run/systemd/seats"); + if (!d) { + if (errno == ENOENT) + return 0; + + return log_error_errno(errno, "Failed to open /run/systemd/seats: %m"); + } + + FOREACH_DIRENT(de, d, return -errno) { + Seat *s; + int k; + + if (!dirent_is_file(de)) + continue; + + s = hashmap_get(m->seats, de->d_name); + if (!s) { + unlinkat(dirfd(d), de->d_name, 0); + continue; + } + + k = seat_load(s); + if (k < 0) + r = k; + } + + return r; +} + +static int manager_enumerate_linger_users(Manager *m) { + _cleanup_closedir_ DIR *d = NULL; + struct dirent *de; + int r = 0; + + assert(m); + + d = opendir("/var/lib/systemd/linger"); + if (!d) { + if (errno == ENOENT) + return 0; + + return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m"); + } + + FOREACH_DIRENT(de, d, return -errno) { + int k; + + if (!dirent_is_file(de)) + continue; + + k = manager_add_user_by_name(m, de->d_name, NULL); + if (k < 0) { + log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name); + r = k; + } + } + + return r; +} + +static int manager_enumerate_users(Manager *m) { + _cleanup_closedir_ DIR *d = NULL; + struct dirent *de; + int r, k; + + assert(m); + + /* Add lingering users */ + r = manager_enumerate_linger_users(m); + + /* Read in user data stored on disk */ + d = opendir("/run/systemd/users"); + if (!d) { + if (errno == ENOENT) + return 0; + + return log_error_errno(errno, "Failed to open /run/systemd/users: %m"); + } + + FOREACH_DIRENT(de, d, return -errno) { + User *u; + + if (!dirent_is_file(de)) + continue; + + k = manager_add_user_by_name(m, de->d_name, &u); + if (k < 0) { + log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name); + + r = k; + continue; + } + + user_add_to_gc_queue(u); + + k = user_load(u); + if (k < 0) + r = k; + } + + return r; +} + +static int manager_enumerate_sessions(Manager *m) { + _cleanup_closedir_ DIR *d = NULL; + struct dirent *de; + int r = 0; + + assert(m); + + /* Read in session data stored on disk */ + d = opendir("/run/systemd/sessions"); + if (!d) { + if (errno == ENOENT) + return 0; + + return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m"); + } + + FOREACH_DIRENT(de, d, return -errno) { + struct Session *s; + int k; + + if (!dirent_is_file(de)) + continue; + + if (!session_id_valid(de->d_name)) { + log_warning("Invalid session file name '%s', ignoring.", de->d_name); + r = -EINVAL; + continue; + } + + k = manager_add_session(m, de->d_name, &s); + if (k < 0) { + log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name); + + r = k; + continue; + } + + session_add_to_gc_queue(s); + + k = session_load(s); + if (k < 0) + r = k; + } + + return r; +} + +static int manager_enumerate_inhibitors(Manager *m) { + _cleanup_closedir_ DIR *d = NULL; + struct dirent *de; + int r = 0; + + assert(m); + + d = opendir("/run/systemd/inhibit"); + if (!d) { + if (errno == ENOENT) + return 0; + + return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m"); + } + + FOREACH_DIRENT(de, d, return -errno) { + int k; + Inhibitor *i; + + if (!dirent_is_file(de)) + continue; + + k = manager_add_inhibitor(m, de->d_name, &i); + if (k < 0) { + log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name); + r = k; + continue; + } + + k = inhibitor_load(i); + if (k < 0) + r = k; + } + + return r; +} + +static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + Manager *m = userdata; + + assert(m); + + d = udev_monitor_receive_device(m->udev_seat_monitor); + if (!d) + return -ENOMEM; + + manager_process_seat_device(m, d); + return 0; +} + +static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + Manager *m = userdata; + + assert(m); + + d = udev_monitor_receive_device(m->udev_device_monitor); + if (!d) + return -ENOMEM; + + manager_process_seat_device(m, d); + return 0; +} + +static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + Manager *m = userdata; + const char *name; + + assert(m); + + d = udev_monitor_receive_device(m->udev_vcsa_monitor); + if (!d) + return -ENOMEM; + + name = udev_device_get_sysname(d); + + /* Whenever a VCSA device is removed try to reallocate our + * VTs, to make sure our auto VTs never go away. */ + + if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove")) + seat_preallocate_vts(m->seat0); + + return 0; +} + +static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + _cleanup_udev_device_unref_ struct udev_device *d = NULL; + Manager *m = userdata; + + assert(m); + + d = udev_monitor_receive_device(m->udev_button_monitor); + if (!d) + return -ENOMEM; + + manager_process_button_device(m, d); + return 0; +} + +static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + Manager *m = userdata; + + assert(m); + assert(m->seat0); + assert(m->console_active_fd == fd); + + seat_read_active_vt(m->seat0); + return 0; +} + +static int manager_reserve_vt(Manager *m) { + _cleanup_free_ char *p = NULL; + + assert(m); + + if (m->reserve_vt <= 0) + return 0; + + if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0) + return log_oom(); + + m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK); + if (m->reserve_vt_fd < 0) { + + /* Don't complain on VT-less systems */ + if (errno != ENOENT) + log_warning_errno(errno, "Failed to pin reserved VT: %m"); + return -errno; + } + + return 0; +} + +static int manager_connect_bus(Manager *m) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + int r; + + assert(m); + assert(!m->bus); + + r = sd_bus_default_system(&m->bus); + if (r < 0) + return log_error_errno(r, "Failed to connect to system bus: %m"); + + r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m); + if (r < 0) + return log_error_errno(r, "Failed to add manager object vtable: %m"); + + r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m); + if (r < 0) + return log_error_errno(r, "Failed to add seat object vtable: %m"); + + r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m); + if (r < 0) + return log_error_errno(r, "Failed to add seat enumerator: %m"); + + r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m); + if (r < 0) + return log_error_errno(r, "Failed to add session object vtable: %m"); + + r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m); + if (r < 0) + return log_error_errno(r, "Failed to add session enumerator: %m"); + + r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m); + if (r < 0) + return log_error_errno(r, "Failed to add user object vtable: %m"); + + r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m); + if (r < 0) + return log_error_errno(r, "Failed to add user enumerator: %m"); + + r = sd_bus_add_match(m->bus, + NULL, + "type='signal'," + "sender='org.freedesktop.systemd1'," + "interface='org.freedesktop.systemd1.Manager'," + "member='JobRemoved'," + "path='/org/freedesktop/systemd1'", + match_job_removed, m); + if (r < 0) + return log_error_errno(r, "Failed to add match for JobRemoved: %m"); + + r = sd_bus_add_match(m->bus, + NULL, + "type='signal'," + "sender='org.freedesktop.systemd1'," + "interface='org.freedesktop.systemd1.Manager'," + "member='UnitRemoved'," + "path='/org/freedesktop/systemd1'", + match_unit_removed, m); + if (r < 0) + return log_error_errno(r, "Failed to add match for UnitRemoved: %m"); + + r = sd_bus_add_match(m->bus, + NULL, + "type='signal'," + "sender='org.freedesktop.systemd1'," + "interface='org.freedesktop.DBus.Properties'," + "member='PropertiesChanged'", + match_properties_changed, m); + if (r < 0) + return log_error_errno(r, "Failed to add match for PropertiesChanged: %m"); + + r = sd_bus_add_match(m->bus, + NULL, + "type='signal'," + "sender='org.freedesktop.systemd1'," + "interface='org.freedesktop.systemd1.Manager'," + "member='Reloading'," + "path='/org/freedesktop/systemd1'", + match_reloading, m); + if (r < 0) + return log_error_errno(r, "Failed to add match for Reloading: %m"); + + r = sd_bus_call_method( + m->bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "Subscribe", + &error, + NULL, NULL); + if (r < 0) { + log_error("Failed to enable subscription: %s", bus_error_message(&error, r)); + return r; + } + + r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0); + if (r < 0) + return log_error_errno(r, "Failed to register name: %m"); + + r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL); + if (r < 0) + return log_error_errno(r, "Failed to attach bus to event loop: %m"); + + return 0; +} + +static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) { + Manager *m = data; + Session *active, *iter; + + /* + * We got a VT-switch signal and we have to acknowledge it immediately. + * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately, + * old user-space might run multiple sessions on a single VT, *sigh*. + * Therefore, we have to iterate all sessions and find one with a vtfd + * on the requested VT. + * As only VTs with active controllers have VT_PROCESS set, our current + * notion of the active VT might be wrong (for instance if the switch + * happens while we setup VT_PROCESS). Therefore, read the current VT + * first and then use s->active->vtnr as reference. Note that this is + * not racy, as no further VT-switch can happen as long as we're in + * synchronous VT_PROCESS mode. + */ + + assert(m->seat0); + seat_read_active_vt(m->seat0); + + active = m->seat0->active; + if (!active || active->vtnr < 1) { + log_warning("Received VT_PROCESS signal without a registered session on that VT."); + return 0; + } + + if (active->vtfd >= 0) { + session_leave_vt(active); + } else { + LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) { + if (iter->vtnr == active->vtnr && iter->vtfd >= 0) { + session_leave_vt(iter); + break; + } + } + } + + return 0; +} + +static int manager_connect_console(Manager *m) { + int r; + + assert(m); + assert(m->console_active_fd < 0); + + /* On certain architectures (S390 and Xen, and containers), + /dev/tty0 does not exist, so don't fail if we can't open + it. */ + if (access("/dev/tty0", F_OK) < 0) + return 0; + + m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC); + if (m->console_active_fd < 0) { + + /* On some systems the device node /dev/tty0 may exist + * even though /sys/class/tty/tty0 does not. */ + if (errno == ENOENT) + return 0; + + return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m"); + } + + r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m); + if (r < 0) { + log_error("Failed to watch foreground console"); + return r; + } + + /* + * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used + * as VT-acquire signal. We ignore any acquire-events (yes, we still + * have to provide a valid signal-number for it!) and acknowledge all + * release events immediately. + */ + + if (SIGRTMIN + 1 > SIGRTMAX) { + log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX); + return -EINVAL; + } + + assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0); + assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0); + + r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m); + if (r < 0) + return r; + + return 0; +} + +static int manager_connect_udev(Manager *m) { + int r; + + assert(m); + assert(!m->udev_seat_monitor); + assert(!m->udev_device_monitor); + assert(!m->udev_vcsa_monitor); + assert(!m->udev_button_monitor); + + m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); + if (!m->udev_seat_monitor) + return -ENOMEM; + + r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat"); + if (r < 0) + return r; + + r = udev_monitor_enable_receiving(m->udev_seat_monitor); + if (r < 0) + return r; + + r = sd_event_add_io(m->event, &m->udev_seat_event_source, udev_monitor_get_fd(m->udev_seat_monitor), EPOLLIN, manager_dispatch_seat_udev, m); + if (r < 0) + return r; + + m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); + if (!m->udev_device_monitor) + return -ENOMEM; + + r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL); + if (r < 0) + return r; + + r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL); + if (r < 0) + return r; + + r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL); + if (r < 0) + return r; + + r = udev_monitor_enable_receiving(m->udev_device_monitor); + if (r < 0) + return r; + + r = sd_event_add_io(m->event, &m->udev_device_event_source, udev_monitor_get_fd(m->udev_device_monitor), EPOLLIN, manager_dispatch_device_udev, m); + if (r < 0) + return r; + + /* Don't watch keys if nobody cares */ + if (m->handle_power_key != HANDLE_IGNORE || + m->handle_suspend_key != HANDLE_IGNORE || + m->handle_hibernate_key != HANDLE_IGNORE || + m->handle_lid_switch != HANDLE_IGNORE || + m->handle_lid_switch_docked != HANDLE_IGNORE) { + + m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); + if (!m->udev_button_monitor) + return -ENOMEM; + + r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch"); + if (r < 0) + return r; + + r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL); + if (r < 0) + return r; + + r = udev_monitor_enable_receiving(m->udev_button_monitor); + if (r < 0) + return r; + + r = sd_event_add_io(m->event, &m->udev_button_event_source, udev_monitor_get_fd(m->udev_button_monitor), EPOLLIN, manager_dispatch_button_udev, m); + if (r < 0) + return r; + } + + /* Don't bother watching VCSA devices, if nobody cares */ + if (m->n_autovts > 0 && m->console_active_fd >= 0) { + + m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); + if (!m->udev_vcsa_monitor) + return -ENOMEM; + + r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL); + if (r < 0) + return r; + + r = udev_monitor_enable_receiving(m->udev_vcsa_monitor); + if (r < 0) + return r; + + r = sd_event_add_io(m->event, &m->udev_vcsa_event_source, udev_monitor_get_fd(m->udev_vcsa_monitor), EPOLLIN, manager_dispatch_vcsa_udev, m); + if (r < 0) + return r; + } + + return 0; +} + +static void manager_gc(Manager *m, bool drop_not_started) { + Seat *seat; + Session *session; + User *user; + + assert(m); + + while ((seat = m->seat_gc_queue)) { + LIST_REMOVE(gc_queue, m->seat_gc_queue, seat); + seat->in_gc_queue = false; + + if (!seat_check_gc(seat, drop_not_started)) { + seat_stop(seat, false); + seat_free(seat); + } + } + + while ((session = m->session_gc_queue)) { + LIST_REMOVE(gc_queue, m->session_gc_queue, session); + session->in_gc_queue = false; + + /* First, if we are not closing yet, initiate stopping */ + if (!session_check_gc(session, drop_not_started) && + session_get_state(session) != SESSION_CLOSING) + session_stop(session, false); + + /* Normally, this should make the session referenced + * again, if it doesn't then let's get rid of it + * immediately */ + if (!session_check_gc(session, drop_not_started)) { + session_finalize(session); + session_free(session); + } + } + + while ((user = m->user_gc_queue)) { + LIST_REMOVE(gc_queue, m->user_gc_queue, user); + user->in_gc_queue = false; + + /* First step: queue stop jobs */ + if (!user_check_gc(user, drop_not_started)) + user_stop(user, false); + + /* Second step: finalize user */ + if (!user_check_gc(user, drop_not_started)) { + user_finalize(user); + user_free(user); + } + } +} + +static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) { + Manager *m = userdata; + struct dual_timestamp since; + usec_t n, elapse; + int r; + + assert(m); + + if (m->idle_action == HANDLE_IGNORE || + m->idle_action_usec <= 0) + return 0; + + n = now(CLOCK_MONOTONIC); + + r = manager_get_idle_hint(m, &since); + if (r <= 0) + /* Not idle. Let's check if after a timeout it might be idle then. */ + elapse = n + m->idle_action_usec; + else { + /* Idle! Let's see if it's time to do something, or if + * we shall sleep for longer. */ + + if (n >= since.monotonic + m->idle_action_usec && + (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) { + log_info("System idle. Taking action."); + + manager_handle_action(m, 0, m->idle_action, false, false); + m->idle_action_not_before_usec = n; + } + + elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec; + } + + if (!m->idle_action_event_source) { + + r = sd_event_add_time( + m->event, + &m->idle_action_event_source, + CLOCK_MONOTONIC, + elapse, USEC_PER_SEC*30, + manager_dispatch_idle_action, m); + if (r < 0) + return log_error_errno(r, "Failed to add idle event source: %m"); + + r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10); + if (r < 0) + return log_error_errno(r, "Failed to set idle event source priority: %m"); + } else { + r = sd_event_source_set_time(m->idle_action_event_source, elapse); + if (r < 0) + return log_error_errno(r, "Failed to set idle event timer: %m"); + + r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT); + if (r < 0) + return log_error_errno(r, "Failed to enable idle event timer: %m"); + } + + return 0; +} + +static int manager_parse_config_file(Manager *m) { + assert(m); + + return config_parse_many_nulstr(PKGSYSCONFDIR "/logind.conf", + CONF_PATHS_NULSTR("systemd/logind.conf.d"), + "Login\0", + config_item_perf_lookup, logind_gperf_lookup, + false, m); +} + +static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { + Manager *m = userdata; + int r; + + manager_reset_config(m); + r = manager_parse_config_file(m); + if (r < 0) + log_warning_errno(r, "Failed to parse config file, using defaults: %m"); + else + log_info("Config file reloaded."); + + return 0; +} + +static int manager_startup(Manager *m) { + int r; + Seat *seat; + Session *session; + User *user; + Button *button; + Inhibitor *inhibitor; + Iterator i; + + assert(m); + + assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGHUP, -1) >= 0); + + r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m); + if (r < 0) + return log_error_errno(r, "Failed to register SIGHUP handler: %m"); + + /* Connect to console */ + r = manager_connect_console(m); + if (r < 0) + return r; + + /* Connect to udev */ + r = manager_connect_udev(m); + if (r < 0) + return log_error_errno(r, "Failed to create udev watchers: %m"); + + /* Connect to the bus */ + r = manager_connect_bus(m); + if (r < 0) + return r; + + /* Instantiate magic seat 0 */ + r = manager_add_seat(m, "seat0", &m->seat0); + if (r < 0) + return log_error_errno(r, "Failed to add seat0: %m"); + + r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec); + if (r < 0) + log_warning_errno(r, "Failed to set up lid switch ignore event source: %m"); + + /* Deserialize state */ + r = manager_enumerate_devices(m); + if (r < 0) + log_warning_errno(r, "Device enumeration failed: %m"); + + r = manager_enumerate_seats(m); + if (r < 0) + log_warning_errno(r, "Seat enumeration failed: %m"); + + r = manager_enumerate_users(m); + if (r < 0) + log_warning_errno(r, "User enumeration failed: %m"); + + r = manager_enumerate_sessions(m); + if (r < 0) + log_warning_errno(r, "Session enumeration failed: %m"); + + r = manager_enumerate_inhibitors(m); + if (r < 0) + log_warning_errno(r, "Inhibitor enumeration failed: %m"); + + r = manager_enumerate_buttons(m); + if (r < 0) + log_warning_errno(r, "Button enumeration failed: %m"); + + /* Remove stale objects before we start them */ + manager_gc(m, false); + + /* Reserve the special reserved VT */ + manager_reserve_vt(m); + + /* And start everything */ + HASHMAP_FOREACH(seat, m->seats, i) + seat_start(seat); + + HASHMAP_FOREACH(user, m->users, i) + user_start(user); + + HASHMAP_FOREACH(session, m->sessions, i) + session_start(session); + + HASHMAP_FOREACH(inhibitor, m->inhibitors, i) + inhibitor_start(inhibitor); + + HASHMAP_FOREACH(button, m->buttons, i) + button_check_switches(button); + + manager_dispatch_idle_action(NULL, 0, m); + + return 0; +} + +static int manager_run(Manager *m) { + int r; + + assert(m); + + for (;;) { + r = sd_event_get_state(m->event); + if (r < 0) + return r; + if (r == SD_EVENT_FINISHED) + return 0; + + manager_gc(m, true); + + r = manager_dispatch_delayed(m, false); + if (r < 0) + return r; + if (r > 0) + continue; + + r = sd_event_run(m->event, (uint64_t) -1); + if (r < 0) + return r; + } +} + +int main(int argc, char *argv[]) { + Manager *m = NULL; + int r; + + log_set_target(LOG_TARGET_AUTO); + log_set_facility(LOG_AUTH); + log_parse_environment(); + log_open(); + + umask(0022); + + if (argc != 1) { + log_error("This program takes no arguments."); + r = -EINVAL; + goto finish; + } + + r = mac_selinux_init(); + if (r < 0) { + log_error_errno(r, "Could not initialize labelling: %m"); + goto finish; + } + + /* Always create the directories people can create inotify + * watches in. Note that some applications might check for the + * existence of /run/systemd/seats/ to determine whether + * logind is available, so please always make sure this check + * stays in. */ + mkdir_label("/run/systemd/seats", 0755); + mkdir_label("/run/systemd/users", 0755); + mkdir_label("/run/systemd/sessions", 0755); + + m = manager_new(); + if (!m) { + r = log_oom(); + goto finish; + } + + manager_parse_config_file(m); + + r = manager_startup(m); + if (r < 0) { + log_error_errno(r, "Failed to fully start up daemon: %m"); + goto finish; + } + + log_debug("systemd-logind running as pid "PID_FMT, getpid()); + + sd_notify(false, + "READY=1\n" + "STATUS=Processing requests..."); + + r = manager_run(m); + + log_debug("systemd-logind stopped as pid "PID_FMT, getpid()); + +finish: + sd_notify(false, + "STOPPING=1\n" + "STATUS=Shutting down..."); + + manager_free(m); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/src/grp-login/systemd-logind/logind.conf.in b/src/grp-login/systemd-logind/logind.conf.in new file mode 100644 index 0000000000..6f720b7708 --- /dev/null +++ b/src/grp-login/systemd-logind/logind.conf.in @@ -0,0 +1,37 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. +# +# Entries in this file show the compile time defaults. +# You can change settings by editing this file. +# Defaults can be restored by simply deleting this file. +# +# See logind.conf(5) for details. + +[Login] +#NAutoVTs=6 +#ReserveVT=6 +#KillUserProcesses=@KILL_USER_PROCESSES@ +#KillOnlyUsers= +#KillExcludeUsers=root +#InhibitDelayMaxSec=5 +#HandlePowerKey=poweroff +#HandleSuspendKey=suspend +#HandleHibernateKey=hibernate +#HandleLidSwitch=suspend +#HandleLidSwitchDocked=ignore +#PowerKeyIgnoreInhibited=no +#SuspendKeyIgnoreInhibited=no +#HibernateKeyIgnoreInhibited=no +#LidSwitchIgnoreInhibited=yes +#HoldoffTimeoutSec=30s +#IdleAction=ignore +#IdleActionSec=30min +#RuntimeDirectorySize=10% +#RemoveIPC=yes +#InhibitorsMax=8192 +#SessionsMax=8192 +#UserTasksMax=33% diff --git a/src/grp-login/systemd-logind/logind.conf.xml b/src/grp-login/systemd-logind/logind.conf.xml new file mode 100644 index 0000000000..994e0e1140 --- /dev/null +++ b/src/grp-login/systemd-logind/logind.conf.xml @@ -0,0 +1,359 @@ +<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="logind.conf" conditional='ENABLE_LOGIND' + xmlns:xi="http://www.w3.org/2001/XInclude"> + <refentryinfo> + <title>logind.conf</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>logind.conf</refentrytitle> + <manvolnum>5</manvolnum> + </refmeta> + + <refnamediv> + <refname>logind.conf</refname> + <refname>logind.conf.d</refname> + <refpurpose>Login manager configuration files</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>/etc/systemd/logind.conf</filename></para> + <para><filename>/etc/systemd/logind.conf.d/*.conf</filename></para> + <para><filename>/run/systemd/logind.conf.d/*.conf</filename></para> + <para><filename>/usr/lib/systemd/logind.conf.d/*.conf</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para>These files configure various parameters of the systemd + login manager, + <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. + </para> + </refsect1> + + <xi:include href="standard-conf.xml" xpointer="main-conf" /> + + <refsect1> + <title>Options</title> + + <para>All options are configured in the + <literal>[Login]</literal> section:</para> + + <variablelist> + + <varlistentry> + <term><varname>NAutoVTs=</varname></term> + + <listitem><para>Takes a positive integer. Configures how many + virtual terminals (VTs) to allocate by default that, when + switched to and are previously unused, + <literal>autovt</literal> services are automatically spawned + on. These services are instantiated from the template unit + <filename>autovt@.service</filename> for the respective VT TTY + name, for example, <filename>autovt@tty4.service</filename>. + By default, <filename>autovt@.service</filename> is linked to + <filename>getty@.service</filename>. In other words, login + prompts are started dynamically as the user switches to unused + virtual terminals. Hence, this parameter controls how many + login <literal>gettys</literal> are available on the VTs. If a + VT is already used by some other subsystem (for example, a + graphical login), this kind of activation will not be + attempted. Note that the VT configured in + <varname>ReserveVT=</varname> is always subject to this kind + of activation, even if it is not one of the VTs configured + with the <varname>NAutoVTs=</varname> directive. Defaults to + 6. When set to 0, automatic spawning of + <literal>autovt</literal> services is + disabled.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>ReserveVT=</varname></term> + + <listitem><para>Takes a positive integer. Identifies one + virtual terminal that shall unconditionally be reserved for + <filename>autovt@.service</filename> activation (see above). + The VT selected with this option will be marked busy + unconditionally, so that no other subsystem will allocate it. + This functionality is useful to ensure that, regardless of how + many VTs are allocated by other subsystems, one login + <literal>getty</literal> is always available. Defaults to 6 + (in other words, there will always be a + <literal>getty</literal> available on Alt-F6.). When set to 0, + VT reservation is disabled.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>KillUserProcesses=</varname></term> + + <listitem><para>Takes a boolean argument. Configures whether the processes of a + user should be killed when the user logs out. If true, the scope unit + corresponding to the session and all processes inside that scope will be + terminated. If false, the scope is "abandoned", see + <citerefentry><refentrytitle>systemd.scope</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + and processes are not killed. Defaults to <literal>yes</literal>, + but see the options <varname>KillOnlyUsers=</varname> and + <varname>KillExcludeUsers=</varname> below.</para> + + <para>In addition to session processes, user process may run under the user + manager unit <filename>user@.service</filename>. Depending on the linger + settings, this may allow users to run processes independent of their login + sessions. See the description of <command>enable-linger</command> in + <citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>. + </para> + + <para>Note that setting <varname>KillUserProcesses=yes</varname> + will break tools like + <citerefentry project='die-net'><refentrytitle>screen</refentrytitle><manvolnum>1</manvolnum></citerefentry> + and + <citerefentry project='die-net'><refentrytitle>tmux</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + unless they are moved out of the session scope. See example in + <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>. + </para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>KillOnlyUsers=</varname></term> + <term><varname>KillExcludeUsers=</varname></term> + + <listitem><para>These settings take space-separated lists of usernames that override + the <varname>KillUserProcesses=</varname> setting. A user name may be added to + <varname>KillExcludeUsers=</varname> to exclude the processes in the session scopes of + that user from being killed even if <varname>KillUserProcesses=yes</varname> is set. If + <varname>KillExcludeUsers=</varname> is not set, the <literal>root</literal> user is + excluded by default. <varname>KillExcludeUsers=</varname> may be set to an empty value + to override this default. If a user is not excluded, <varname>KillOnlyUsers=</varname> + is checked next. If this setting is specified, only the session scopes of those users + will be killed. Otherwise, users are subject to the + <varname>KillUserProcesses=yes</varname> setting.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>IdleAction=</varname></term> + + <listitem><para>Configures the action to take when the system + is idle. Takes one of + <literal>ignore</literal>, + <literal>poweroff</literal>, + <literal>reboot</literal>, + <literal>halt</literal>, + <literal>kexec</literal>, + <literal>suspend</literal>, + <literal>hibernate</literal>, + <literal>hybrid-sleep</literal>, and + <literal>lock</literal>. + Defaults to <literal>ignore</literal>.</para> + + <para>Note that this requires that user sessions correctly + report the idle status to the system. The system will execute + the action after all sessions report that they are idle, no + idle inhibitor lock is active, and subsequently, the time + configured with <varname>IdleActionSec=</varname> (see below) + has expired.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><varname>IdleActionSec=</varname></term> + + <listitem><para>Configures the delay after which the action + configured in <varname>IdleAction=</varname> (see above) is + taken after the system is idle.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>InhibitDelayMaxSec=</varname></term> + + <listitem><para>Specifies the maximum time a system shutdown + or sleep request is delayed due to an inhibitor lock of type + <literal>delay</literal> being active before the inhibitor is + ignored and the operation executes anyway. Defaults to + 5.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>HandlePowerKey=</varname></term> + <term><varname>HandleSuspendKey=</varname></term> + <term><varname>HandleHibernateKey=</varname></term> + <term><varname>HandleLidSwitch=</varname></term> + <term><varname>HandleLidSwitchDocked=</varname></term> + + <listitem><para>Controls how logind shall handle the + system power and sleep keys and the lid switch to trigger + actions such as system power-off or suspend. Can be one of + <literal>ignore</literal>, + <literal>poweroff</literal>, + <literal>reboot</literal>, + <literal>halt</literal>, + <literal>kexec</literal>, + <literal>suspend</literal>, + <literal>hibernate</literal>, + <literal>hybrid-sleep</literal>, and + <literal>lock</literal>. + If <literal>ignore</literal>, logind will never handle these + keys. If <literal>lock</literal>, all running sessions will be + screen-locked; otherwise, the specified action will be taken + in the respective event. Only input devices with the + <literal>power-switch</literal> udev tag will be watched for + key/lid switch events. <varname>HandlePowerKey=</varname> + defaults to <literal>poweroff</literal>. + <varname>HandleSuspendKey=</varname> and + <varname>HandleLidSwitch=</varname> default to + <literal>suspend</literal>. + <varname>HandleLidSwitchDocked=</varname> defaults to + <literal>ignore</literal>. + <varname>HandleHibernateKey=</varname> defaults to + <literal>hibernate</literal>. If the system is inserted in a + docking station, or if more than one display is connected, the + action specified by <varname>HandleLidSwitchDocked=</varname> + occurs; otherwise the <varname>HandleLidSwitch=</varname> + action occurs.</para> + + <para>A different application may disable logind's handling of system power and + sleep keys and the lid switch by taking a low-level inhibitor lock + ("handle-power-key", "handle-suspend-key", "handle-hibernate-key", + "handle-lid-switch"). This is most commonly used by graphical desktop environments + to take over suspend and hibernation handling, and to use their own configuration + mechanisms. If a low-level inhibitor lock is taken, logind will not take any + action when that key or switch is triggered and the <varname>Handle*=</varname> + settings are irrelevant.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>PowerKeyIgnoreInhibited=</varname></term> + <term><varname>SuspendKeyIgnoreInhibited=</varname></term> + <term><varname>HibernateKeyIgnoreInhibited=</varname></term> + <term><varname>LidSwitchIgnoreInhibited=</varname></term> + + <listitem><para>Controls whether actions that <command>systemd-logind</command> + takes when the power and sleep keys and the lid switch are triggered are subject + to high-level inhibitor locks ("shutdown", "sleep", "idle"). Low level inhibitor + locks ("handle-*-key"), are always honored, irrespective of this setting.</para> + + <para>These settings take boolean arguments. If <literal>no</literal>, the + inhibitor locks taken by applications are respected. If <literal>yes</literal>, + "shutdown", "sleep", and "idle" inhibitor locks are ignored. + <varname>PowerKeyIgnoreInhibited=</varname>, + <varname>SuspendKeyIgnoreInhibited=</varname>, and + <varname>HibernateKeyIgnoreInhibited=</varname> default to <literal>no</literal>. + <varname>LidSwitchIgnoreInhibited=</varname> defaults to <literal>yes</literal>. + This means that when <command>systemd-logind</command> is handling events by + itself (no low level inhibitor locks are taken by another application), the lid + switch does not respect suspend blockers by default, but the power and sleep keys + do.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>HoldoffTimeoutSec=</varname></term> + + <listitem><para>Specifies the timeout after system startup or + system resume in which systemd will hold off on reacting to + lid events. This is required for the system to properly + detect any hotplugged devices so systemd can ignore lid events + if external monitors, or docks, are connected. If set to 0, + systemd will always react immediately, possibly before the + kernel fully probed all hotplugged devices. This is safe, as + long as you do not care for systemd to account for devices + that have been plugged or unplugged while the system was off. + Defaults to 30s.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>RuntimeDirectorySize=</varname></term> + + <listitem><para>Sets the size limit on the + <varname>$XDG_RUNTIME_DIR</varname> runtime directory for each + user who logs in. Takes a size in bytes, optionally suffixed + with the usual K, G, M, and T suffixes, to the base 1024 + (IEC). Alternatively, a numerical percentage suffixed by + <literal>%</literal> may be specified, which sets the size + limit relative to the amount of physical RAM. Defaults to 10%. + Note that this size is a safety limit only. As each runtime + directory is a tmpfs file system, it will only consume as much + memory as is needed.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>InhibitorsMax=</varname></term> + + <listitem><para>Controls the maximum number of concurrent inhibitors to permit. Defaults to 8192 + (8K).</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>SessionsMax=</varname></term> + + <listitem><para>Controls the maximum number of concurrent user sessions to manage. Defaults to 8192 + (8K). Depending on how the <filename>pam_systemd.so</filename> module is included in the PAM stack + configuration, further login sessions will either be refused, or permitted but not tracked by + <filename>systemd-logind</filename>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>UserTasksMax=</varname></term> + + <listitem><para>Sets the maximum number of OS tasks each user may run concurrently. This controls the + <varname>TasksMax=</varname> setting of the per-user slice unit, see + <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry> + for details. If assigned the special value <literal>infinity</literal>, no tasks limit is applied. + Defaults to 33%, which equals 10813 with the kernel's defaults on the host, but might be smaller in + OS containers.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>RemoveIPC=</varname></term> + + <listitem><para>Controls whether System V and POSIX IPC objects belonging to the user shall be removed when the + user fully logs out. Takes a boolean argument. If enabled, the user may not consume IPC resources after the + last of the user's sessions terminated. This covers System V semaphores, shared memory and message queues, as + well as POSIX shared memory and message queues. Note that IPC objects of the root user and other system users + are excluded from the effect of this setting. Defaults to <literal>yes</literal>.</para></listitem> + </varlistentry> + + </variablelist> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> diff --git a/src/grp-login/systemd-logind/logind.h b/src/grp-login/systemd-logind/logind.h new file mode 100644 index 0000000000..4e6f424e9e --- /dev/null +++ b/src/grp-login/systemd-logind/logind.h @@ -0,0 +1,199 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <stdbool.h> + +#include <libudev.h> +#include <systemd/sd-bus.h> +#include <systemd/sd-event.h> + +#include "systemd-basic/hashmap.h" +#include "systemd-basic/list.h" +#include "systemd-basic/set.h" + +typedef struct Manager Manager; + +#include "logind-action.h" +#include "logind-button.h" +#include "logind-device.h" +#include "logind-inhibit.h" + +struct Manager { + sd_event *event; + sd_bus *bus; + + Hashmap *devices; + Hashmap *seats; + Hashmap *sessions; + Hashmap *users; + Hashmap *inhibitors; + Hashmap *buttons; + + LIST_HEAD(Seat, seat_gc_queue); + LIST_HEAD(Session, session_gc_queue); + LIST_HEAD(User, user_gc_queue); + + struct udev *udev; + struct udev_monitor *udev_seat_monitor, *udev_device_monitor, *udev_vcsa_monitor, *udev_button_monitor; + + sd_event_source *console_active_event_source; + sd_event_source *udev_seat_event_source; + sd_event_source *udev_device_event_source; + sd_event_source *udev_vcsa_event_source; + sd_event_source *udev_button_event_source; + + int console_active_fd; + + unsigned n_autovts; + + unsigned reserve_vt; + int reserve_vt_fd; + + Seat *seat0; + + char **kill_only_users, **kill_exclude_users; + bool kill_user_processes; + + unsigned long session_counter; + unsigned long inhibit_counter; + + Hashmap *session_units; + Hashmap *user_units; + + usec_t inhibit_delay_max; + + /* If an action is currently being executed or is delayed, + * this is != 0 and encodes what is being done */ + InhibitWhat action_what; + + /* If a shutdown/suspend was delayed due to a inhibitor this + contains the unit name we are supposed to start after the + delay is over */ + const char *action_unit; + + /* If a shutdown/suspend is currently executed, then this is + * the job of it */ + char *action_job; + sd_event_source *inhibit_timeout_source; + + char *scheduled_shutdown_type; + usec_t scheduled_shutdown_timeout; + sd_event_source *scheduled_shutdown_timeout_source; + uid_t scheduled_shutdown_uid; + char *scheduled_shutdown_tty; + sd_event_source *nologin_timeout_source; + bool unlink_nologin; + + char *wall_message; + unsigned enable_wall_messages; + sd_event_source *wall_message_timeout_source; + + bool shutdown_dry_run; + + sd_event_source *idle_action_event_source; + usec_t idle_action_usec; + usec_t idle_action_not_before_usec; + HandleAction idle_action; + + HandleAction handle_power_key; + HandleAction handle_suspend_key; + HandleAction handle_hibernate_key; + HandleAction handle_lid_switch; + HandleAction handle_lid_switch_docked; + + bool power_key_ignore_inhibited; + bool suspend_key_ignore_inhibited; + bool hibernate_key_ignore_inhibited; + bool lid_switch_ignore_inhibited; + + bool remove_ipc; + + Hashmap *polkit_registry; + + usec_t holdoff_timeout_usec; + sd_event_source *lid_switch_ignore_event_source; + + size_t runtime_dir_size; + uint64_t user_tasks_max; + uint64_t sessions_max; + uint64_t inhibitors_max; +}; + +int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device); +int manager_add_button(Manager *m, const char *name, Button **_button); +int manager_add_seat(Manager *m, const char *id, Seat **_seat); +int manager_add_session(Manager *m, const char *id, Session **_session); +int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user); +int manager_add_user_by_name(Manager *m, const char *name, User **_user); +int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user); +int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor); + +int manager_process_seat_device(Manager *m, struct udev_device *d); +int manager_process_button_device(Manager *m, struct udev_device *d); + +int manager_spawn_autovt(Manager *m, unsigned int vtnr); + +bool manager_shall_kill(Manager *m, const char *user); + +int manager_get_idle_hint(Manager *m, dual_timestamp *t); + +int manager_get_user_by_pid(Manager *m, pid_t pid, User **user); +int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session); + +bool manager_is_docked_or_external_displays(Manager *m); + +extern const sd_bus_vtable manager_vtable[]; + +int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error); +int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error); +int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error); +int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error); +int match_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error); + +int bus_manager_shutdown_or_sleep_now_or_later(Manager *m, const char *unit_name, InhibitWhat w, sd_bus_error *error); + +int manager_send_changed(Manager *manager, const char *property, ...) _sentinel_; + +int manager_start_slice(Manager *manager, const char *slice, const char *description, const char *after, const char *after2, uint64_t tasks_max, sd_bus_error *error, char **job); +int manager_start_scope(Manager *manager, const char *scope, pid_t pid, const char *slice, const char *description, const char *after, const char *after2, uint64_t tasks_max, sd_bus_error *error, char **job); +int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job); +int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job); +int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error); +int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error); +int manager_unit_is_active(Manager *manager, const char *unit); +int manager_job_is_active(Manager *manager, const char *path); + +/* gperf lookup function */ +const struct ConfigPerfItem* logind_gperf_lookup(const char *key, GPERF_LEN_TYPE length); + +int manager_set_lid_switch_ignore(Manager *m, usec_t until); + +int config_parse_tmpfs_size(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); +int config_parse_user_tasks_max(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); + +int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret); +int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret); +int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret); + +int manager_setup_wall_message_timer(Manager *m); +bool logind_wall_tty_filter(const char *tty, void *userdata); + +int manager_dispatch_delayed(Manager *manager, bool timeout); diff --git a/src/grp-login/systemd-logind/org.freedesktop.login1.conf b/src/grp-login/systemd-logind/org.freedesktop.login1.conf new file mode 100644 index 0000000000..c89e40457e --- /dev/null +++ b/src/grp-login/systemd-logind/org.freedesktop.login1.conf @@ -0,0 +1,274 @@ +<?xml version="1.0"?> <!--*-nxml-*--> +<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" + "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"> + +<!-- + This file is part of systemd. + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. +--> + +<busconfig> + + <policy user="root"> + <allow own="org.freedesktop.login1"/> + <allow send_destination="org.freedesktop.login1"/> + <allow receive_sender="org.freedesktop.login1"/> + </policy> + + <policy context="default"> + <deny send_destination="org.freedesktop.login1"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.DBus.Introspectable"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.DBus.Peer"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.DBus.Properties" + send_member="Get"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.DBus.Properties" + send_member="GetAll"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="GetSession"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="GetSessionByPID"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="GetUser"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="GetUserByPID"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="GetSeat"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="ListSessions"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="ListUsers"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="ListSeats"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="ListInhibitors"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="Inhibit"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="SetUserLinger"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="ActivateSession"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="ActivateSessionOnSeat"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="LockSession"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="UnlockSession"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="LockSessions"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="UnlockSessions"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="KillSession"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="KillUser"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="TerminateSession"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="TerminateUser"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="TerminateSeat"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="PowerOff"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="Reboot"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="Suspend"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="Hibernate"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="HybridSleep"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="CanPowerOff"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="CanReboot"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="CanSuspend"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="CanHibernate"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="CanHybridSleep"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="ScheduleShutdown"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="CancelScheduledShutdown"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="CanRebootToFirmwareSetup"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="SetRebootToFirmwareSetup"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="SetWallMessage"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="AttachDevice"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Manager" + send_member="FlushDevices"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Seat" + send_member="Terminate"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Seat" + send_member="ActivateSession"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Seat" + send_member="SwitchTo"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Seat" + send_member="SwitchToPrevious"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Seat" + send_member="SwitchToNext"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="Terminate"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="Activate"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="Lock"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="Unlock"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="SetIdleHint"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="SetLockedHint"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="Kill"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="TakeControl"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="ReleaseControl"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="TakeDevice"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="ReleaseDevice"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.Session" + send_member="PauseDeviceComplete"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.User" + send_member="Terminate"/> + + <allow send_destination="org.freedesktop.login1" + send_interface="org.freedesktop.login1.User" + send_member="Kill"/> + + <allow receive_sender="org.freedesktop.login1"/> + </policy> + +</busconfig> diff --git a/src/grp-login/systemd-logind/org.freedesktop.login1.policy.in b/src/grp-login/systemd-logind/org.freedesktop.login1.policy.in new file mode 100644 index 0000000000..66cbce393c --- /dev/null +++ b/src/grp-login/systemd-logind/org.freedesktop.login1.policy.in @@ -0,0 +1,325 @@ +<?xml version="1.0" encoding="UTF-8"?> <!--*-nxml-*--> +<!DOCTYPE policyconfig PUBLIC "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN" + "http://www.freedesktop.org/standards/PolicyKit/1/policyconfig.dtd"> + +<!-- + This file is part of systemd. + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. +--> + +<policyconfig> + + <vendor>The systemd Project</vendor> + <vendor_url>http://www.freedesktop.org/wiki/Software/systemd</vendor_url> + + <action id="org.freedesktop.login1.inhibit-block-shutdown"> + <_description>Allow applications to inhibit system shutdown</_description> + <_message>Authentication is required for an application to inhibit system shutdown.</_message> + <defaults> + <allow_any>no</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.inhibit-delay-shutdown org.freedesktop.login1.inhibit-block-sleep org.freedesktop.login1.inhibit-delay-sleep org.freedesktop.login1.inhibit-block-idle</annotate> + </action> + + <action id="org.freedesktop.login1.inhibit-delay-shutdown"> + <_description>Allow applications to delay system shutdown</_description> + <_message>Authentication is required for an application to delay system shutdown.</_message> + <defaults> + <allow_any>yes</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.inhibit-delay-sleep</annotate> + </action> + + <action id="org.freedesktop.login1.inhibit-block-sleep"> + <_description>Allow applications to inhibit system sleep</_description> + <_message>Authentication is required for an application to inhibit system sleep.</_message> + <defaults> + <allow_any>no</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.inhibit-delay-sleep org.freedesktop.login1.inhibit-block-idle</annotate> + </action> + + <action id="org.freedesktop.login1.inhibit-delay-sleep"> + <_description>Allow applications to delay system sleep</_description> + <_message>Authentication is required for an application to delay system sleep.</_message> + <defaults> + <allow_any>yes</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.inhibit-block-idle"> + <_description>Allow applications to inhibit automatic system suspend</_description> + <_message>Authentication is required for an application to inhibit automatic system suspend.</_message> + <defaults> + <allow_any>yes</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.inhibit-handle-power-key"> + <_description>Allow applications to inhibit system handling of the power key</_description> + <_message>Authentication is required for an application to inhibit system handling of the power key.</_message> + <defaults> + <allow_any>no</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.inhibit-handle-suspend-key org.freedesktop.login1.inhibit-handle-hibernate-key org.freedesktop.login1.inhibit-handle-lid-switch</annotate> + </action> + + <action id="org.freedesktop.login1.inhibit-handle-suspend-key"> + <_description>Allow applications to inhibit system handling of the suspend key</_description> + <_message>Authentication is required for an application to inhibit system handling of the suspend key.</_message> + <defaults> + <allow_any>no</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.inhibit-handle-hibernate-key org.freedesktop.login1.inhibit-handle-lid-switch</annotate> + </action> + + <action id="org.freedesktop.login1.inhibit-handle-hibernate-key"> + <_description>Allow applications to inhibit system handling of the hibernate key</_description> + <_message>Authentication is required for an application to inhibit system handling of the hibernate key.</_message> + <defaults> + <allow_any>no</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.inhibit-handle-lid-switch"> + <_description>Allow applications to inhibit system handling of the lid switch</_description> + <_message>Authentication is required for an application to inhibit system handling of the lid switch.</_message> + <defaults> + <allow_any>no</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.set-self-linger"> + <_description>Allow non-logged-in user to run programs</_description> + <_message>Explicit request is required to run programs as a non-logged-in user.</_message> + <defaults> + <allow_any>yes</allow_any> + <allow_inactive>yes</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.set-user-linger"> + <_description>Allow non-logged-in users to run programs</_description> + <_message>Authentication is required to run programs as a non-logged-in user.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.attach-device"> + <_description>Allow attaching devices to seats</_description> + <_message>Authentication is required for attaching a device to a seat.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.flush-devices</annotate> + </action> + + <action id="org.freedesktop.login1.flush-devices"> + <_description>Flush device to seat attachments</_description> + <_message>Authentication is required for resetting how devices are attached to seats.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.power-off"> + <_description>Power off the system</_description> + <_message>Authentication is required for powering off the system.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.set-wall-message</annotate> + </action> + + <action id="org.freedesktop.login1.power-off-multiple-sessions"> + <_description>Power off the system while other users are logged in</_description> + <_message>Authentication is required for powering off the system while other users are logged in.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.power-off</annotate> + </action> + + <action id="org.freedesktop.login1.power-off-ignore-inhibit"> + <_description>Power off the system while an application asked to inhibit it</_description> + <_message>Authentication is required for powering off the system while an application asked to inhibit it.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.power-off</annotate> + </action> + + <action id="org.freedesktop.login1.reboot"> + <_description>Reboot the system</_description> + <_message>Authentication is required for rebooting the system.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.set-wall-message</annotate> + </action> + + <action id="org.freedesktop.login1.reboot-multiple-sessions"> + <_description>Reboot the system while other users are logged in</_description> + <_message>Authentication is required for rebooting the system while other users are logged in.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.reboot</annotate> + </action> + + <action id="org.freedesktop.login1.reboot-ignore-inhibit"> + <_description>Reboot the system while an application asked to inhibit it</_description> + <_message>Authentication is required for rebooting the system while an application asked to inhibit it.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.reboot</annotate> + </action> + + <action id="org.freedesktop.login1.suspend"> + <_description>Suspend the system</_description> + <_message>Authentication is required for suspending the system.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.suspend-multiple-sessions"> + <_description>Suspend the system while other users are logged in</_description> + <_message>Authentication is required for suspending the system while other users are logged in.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.suspend</annotate> + </action> + + <action id="org.freedesktop.login1.suspend-ignore-inhibit"> + <_description>Suspend the system while an application asked to inhibit it</_description> + <_message>Authentication is required for suspending the system while an application asked to inhibit it.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.suspend</annotate> + </action> + + <action id="org.freedesktop.login1.hibernate"> + <_description>Hibernate the system</_description> + <_message>Authentication is required for hibernating the system.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.hibernate-multiple-sessions"> + <_description>Hibernate the system while other users are logged in</_description> + <_message>Authentication is required for hibernating the system while other users are logged in.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>yes</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.hibernate</annotate> + </action> + + <action id="org.freedesktop.login1.hibernate-ignore-inhibit"> + <_description>Hibernate the system while an application asked to inhibit it</_description> + <_message>Authentication is required for hibernating the system while an application asked to inhibit it.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.login1.hibernate</annotate> + </action> + + <action id="org.freedesktop.login1.manage"> + <_description>Manage active sessions, users and seats</_description> + <_message>Authentication is required for managing active sessions, users and seats.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.lock-sessions"> + <_description>Lock or unlock active sessions</_description> + <_message>Authentication is required to lock or unlock active sessions.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.set-reboot-to-firmware-setup"> + <_description>Allow indication to the firmware to boot to setup interface</_description> + <_message>Authentication is required to indicate to the firmware to boot to setup interface.</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.login1.set-wall-message"> + <_description>Set a wall message</_description> + <_message>Authentication is required to set a wall message</_message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + +</policyconfig> diff --git a/src/grp-login/systemd-logind/org.freedesktop.login1.service b/src/grp-login/systemd-logind/org.freedesktop.login1.service new file mode 100644 index 0000000000..762dae2bb3 --- /dev/null +++ b/src/grp-login/systemd-logind/org.freedesktop.login1.service @@ -0,0 +1,12 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[D-BUS Service] +Name=org.freedesktop.login1 +Exec=/bin/false +User=root +SystemdService=dbus-org.freedesktop.login1.service diff --git a/src/grp-login/systemd-logind/systemd-logind.service.in b/src/grp-login/systemd-logind/systemd-logind.service.in new file mode 100644 index 0000000000..0b6de35733 --- /dev/null +++ b/src/grp-login/systemd-logind/systemd-logind.service.in @@ -0,0 +1,35 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Login Service +Documentation=man:systemd-logind.service(8) man:logind.conf(5) +Documentation=http://www.freedesktop.org/wiki/Software/systemd/logind +Documentation=http://www.freedesktop.org/wiki/Software/systemd/multiseat +Wants=user.slice +After=nss-user-lookup.target user.slice + +# Ask for the dbus socket. If running over kdbus, the socket will +# not be actually used. +Wants=dbus.socket +After=dbus.socket + +[Service] +ExecStart=@rootlibexecdir@/systemd-logind +Restart=always +RestartSec=0 +BusName=org.freedesktop.login1 +WatchdogSec=3min +CapabilityBoundingSet=CAP_SYS_ADMIN CAP_MAC_ADMIN CAP_AUDIT_CONTROL CAP_CHOWN CAP_KILL CAP_DAC_READ_SEARCH CAP_DAC_OVERRIDE CAP_FOWNER CAP_SYS_TTY_CONFIG +MemoryDenyWriteExecute=yes +RestrictRealtime=yes +RestrictAddressFamilies=AF_UNIX AF_NETLINK AF_INET AF_INET6 +SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @obsolete @raw-io + +# Increase the default a bit in order to allow many simultaneous +# logins since we keep one fd open per session. +LimitNOFILE=16384 diff --git a/src/grp-login/systemd-logind/systemd-logind.service.xml b/src/grp-login/systemd-logind/systemd-logind.service.xml new file mode 100644 index 0000000000..f0bdb1c756 --- /dev/null +++ b/src/grp-login/systemd-logind/systemd-logind.service.xml @@ -0,0 +1,121 @@ +<?xml version='1.0'?> <!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="systemd-logind.service" conditional='ENABLE_LOGIND'> + + <refentryinfo> + <title>systemd-logind.service</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>systemd-logind.service</refentrytitle> + <manvolnum>8</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-logind.service</refname> + <refname>systemd-logind</refname> + <refpurpose>Login manager</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>systemd-logind.service</filename></para> + <para><filename>/usr/lib/systemd/systemd-logind</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><command>systemd-logind</command> is a system service that + manages user logins. It is responsible for:</para> + + <itemizedlist> + <listitem><para>Keeping track of users and sessions, their + processes and their idle state</para></listitem> + + <listitem><para>Providing PolicyKit-based access for users to + operations such as system shutdown or sleep</para></listitem> + + <listitem><para>Implementing a shutdown/sleep inhibition logic + for applications</para></listitem> + + <listitem><para>Handling of power/sleep hardware + keys</para></listitem> + + <listitem><para>Multi-seat management</para></listitem> + + <listitem><para>Session switch management</para></listitem> + + <listitem><para>Device access management for + users</para></listitem> + + <listitem><para>Automatic spawning of text logins (gettys) on + virtual console activation and user runtime directory + management</para></listitem> + </itemizedlist> + + <para>User sessions are registered with logind via the + <citerefentry><refentrytitle>pam_systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry> + PAM module.</para> + + <para>See + <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> + for information about the configuration of this service.</para> + + <para>See <ulink + url="http://www.freedesktop.org/wiki/Software/systemd/multiseat">Multi-Seat + on Linux</ulink> for an introduction into basic concepts of logind + such as users, sessions and seats.</para> + + <para>See the <ulink + url="http://www.freedesktop.org/wiki/Software/systemd/logind"> + logind D-Bus API Documentation</ulink> for information about the + APIs <filename>systemd-logind</filename> provides.</para> + + <para>For more information on the inhibition logic see the <ulink + url="http://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor + Lock Developer Documentation</ulink>.</para> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-user-sessions.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>pam_systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> diff --git a/src/grp-login/systemd-logind/user.slice b/src/grp-login/systemd-logind/user.slice new file mode 100644 index 0000000000..9fa6284c12 --- /dev/null +++ b/src/grp-login/systemd-logind/user.slice @@ -0,0 +1,11 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=User and Session Slice +Documentation=man:systemd.special(7) +Before=slices.target |