diff options
Diffstat (limited to 'src/grp-login/systemd-logind/logind-dbus.c')
| -rw-r--r-- | src/grp-login/systemd-logind/logind-dbus.c | 3170 |
1 files changed, 3170 insertions, 0 deletions
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; +} |