/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 .
***/
#include
#include
#include
#include
#include
#include "sd-daemon.h"
#include "strv.h"
#include "conf-parser.h"
#include "bus-util.h"
#include "bus-error.h"
#include "logind.h"
#include "udev-util.h"
#include "formats-util.h"
static void manager_free(Manager *m);
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->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->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->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
m->runtime_dir_size = PAGE_ALIGN((size_t) (physical_memory() / 10)); /* 10% */
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);
m->busnames = set_new(&string_hash_ops);
if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->busnames ||
!m->user_units || !m->session_units)
goto fail;
m->kill_exclude_users = strv_new("root", NULL);
if (!m->kill_exclude_users)
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);
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;
assert(m);
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);
set_free_free(m->busnames);
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->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);
if (m->udev_seat_monitor)
udev_monitor_unref(m->udev_seat_monitor);
if (m->udev_device_monitor)
udev_monitor_unref(m->udev_device_monitor);
if (m->udev_vcsa_monitor)
udev_monitor_unref(m->udev_vcsa_monitor);
if (m->udev_button_monitor)
udev_monitor_unref(m->udev_button_monitor);
if (m->udev)
udev_unref(m->udev);
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;
log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
return -errno;
}
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;
log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
return -errno;
}
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;
log_error_errno(errno, "Failed to open /run/systemd/users: %m");
return -errno;
}
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;
log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
return -errno;
}
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;
log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
return -errno;
}
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_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.DBus',"
"interface='org.freedesktop.DBus',"
"member='NameOwnerChanged',"
"path='/org/freedesktop/DBus'",
match_name_owner_changed, m);
if (r < 0)
return log_error_errno(r, "Failed to add match for NameOwnerChanged: %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, 0);
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;
log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
return -errno;
}
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;
}
r = ignore_signals(SIGRTMIN + 1, -1);
if (r < 0)
return log_error_errno(r, "Cannot ignore SIGRTMIN + 1: %m");
r = sigprocmask_many(SIG_BLOCK, SIGRTMIN, -1);
if (r < 0)
return log_error_errno(r, "Cannot block SIGRTMIN: %m");
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 busy 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_startup(Manager *m) {
int r;
Seat *seat;
Session *session;
User *user;
Button *button;
Inhibitor *inhibitor;
Iterator i;
assert(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 = sd_event_run(m->event, (uint64_t) -1);
if (r < 0)
return r;
}
}
static int manager_parse_config_file(Manager *m) {
assert(m);
return config_parse_many("/etc/systemd/logind.conf",
CONF_DIRS_NULSTR("systemd/logind.conf"),
"Login\0",
config_item_perf_lookup, logind_gperf_lookup,
false, m);
}
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;
}
/* 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...");
if (m)
manager_free(m);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}