1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include <sys/epoll.h>
29 #include <sys/ioctl.h>
31 #include <sys/timerfd.h>
33 #include <systemd/sd-daemon.h>
36 #include "dbus-common.h"
37 #include "dbus-loop.h"
39 #include "conf-parser.h"
42 Manager *manager_new(void) {
49 m->console_active_fd = -1;
53 m->udev_button_fd = -1;
55 m->reserve_vt_fd = -1;
59 m->inhibit_delay_max = 5 * USEC_PER_SEC;
60 m->handle_power_key = HANDLE_POWEROFF;
61 m->handle_suspend_key = HANDLE_SUSPEND;
62 m->handle_hibernate_key = HANDLE_HIBERNATE;
63 m->handle_lid_switch = HANDLE_SUSPEND;
64 m->lid_switch_ignore_inhibited = true;
66 m->idle_action_fd = -1;
67 m->idle_action_usec = 30 * USEC_PER_MINUTE;
68 m->idle_action = HANDLE_IGNORE;
69 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
71 m->devices = hashmap_new(string_hash_func, string_compare_func);
72 m->seats = hashmap_new(string_hash_func, string_compare_func);
73 m->sessions = hashmap_new(string_hash_func, string_compare_func);
74 m->users = hashmap_new(trivial_hash_func, trivial_compare_func);
75 m->inhibitors = hashmap_new(string_hash_func, string_compare_func);
76 m->buttons = hashmap_new(string_hash_func, string_compare_func);
78 m->user_cgroups = hashmap_new(string_hash_func, string_compare_func);
79 m->session_cgroups = hashmap_new(string_hash_func, string_compare_func);
81 m->session_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
82 m->inhibitor_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
83 m->button_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
85 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons ||
86 !m->user_cgroups || !m->session_cgroups ||
87 !m->session_fds || !m->inhibitor_fds || !m->button_fds) {
92 m->reset_controllers = strv_new("cpu", NULL);
93 m->kill_exclude_users = strv_new("root", NULL);
94 if (!m->reset_controllers || !m->kill_exclude_users) {
105 if (cg_get_user_path(&m->cgroup_path) < 0) {
113 void manager_free(Manager *m) {
123 while ((session = hashmap_first(m->sessions)))
124 session_free(session);
126 while ((u = hashmap_first(m->users)))
129 while ((d = hashmap_first(m->devices)))
132 while ((s = hashmap_first(m->seats)))
135 while ((i = hashmap_first(m->inhibitors)))
138 while ((b = hashmap_first(m->buttons)))
141 hashmap_free(m->devices);
142 hashmap_free(m->seats);
143 hashmap_free(m->sessions);
144 hashmap_free(m->users);
145 hashmap_free(m->inhibitors);
146 hashmap_free(m->buttons);
148 hashmap_free(m->user_cgroups);
149 hashmap_free(m->session_cgroups);
151 hashmap_free(m->session_fds);
152 hashmap_free(m->inhibitor_fds);
153 hashmap_free(m->button_fds);
155 if (m->console_active_fd >= 0)
156 close_nointr_nofail(m->console_active_fd);
158 if (m->udev_seat_monitor)
159 udev_monitor_unref(m->udev_seat_monitor);
160 if (m->udev_vcsa_monitor)
161 udev_monitor_unref(m->udev_vcsa_monitor);
162 if (m->udev_button_monitor)
163 udev_monitor_unref(m->udev_button_monitor);
169 dbus_connection_flush(m->bus);
170 dbus_connection_close(m->bus);
171 dbus_connection_unref(m->bus);
175 close_nointr_nofail(m->bus_fd);
177 if (m->epoll_fd >= 0)
178 close_nointr_nofail(m->epoll_fd);
180 if (m->reserve_vt_fd >= 0)
181 close_nointr_nofail(m->reserve_vt_fd);
183 if (m->idle_action_fd >= 0)
184 close_nointr_nofail(m->idle_action_fd);
186 strv_free(m->controllers);
187 strv_free(m->reset_controllers);
188 strv_free(m->kill_only_users);
189 strv_free(m->kill_exclude_users);
193 free(m->cgroup_path);
197 int manager_add_device(Manager *m, const char *sysfs, Device **_device) {
203 d = hashmap_get(m->devices, sysfs);
211 d = device_new(m, sysfs);
221 int manager_add_seat(Manager *m, const char *id, Seat **_seat) {
227 s = hashmap_get(m->seats, id);
245 int manager_add_session(Manager *m, User *u, const char *id, Session **_session) {
251 s = hashmap_get(m->sessions, id);
259 s = session_new(m, u, id);
269 int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) {
275 u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
283 u = user_new(m, uid, gid, name);
293 int manager_add_user_by_name(Manager *m, const char *name, User **_user) {
301 r = get_user_creds(&name, &uid, &gid, NULL, NULL);
305 return manager_add_user(m, uid, gid, name, _user);
308 int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
316 return errno ? -errno : -ENOENT;
318 return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);
321 int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) {
327 i = hashmap_get(m->inhibitors, id);
335 i = inhibitor_new(m, id);
345 int manager_add_button(Manager *m, const char *name, Button **_button) {
351 b = hashmap_get(m->buttons, name);
359 b = button_new(m, name);
369 int manager_process_seat_device(Manager *m, struct udev_device *d) {
375 if (streq_ptr(udev_device_get_action(d), "remove")) {
377 device = hashmap_get(m->devices, udev_device_get_syspath(d));
381 seat_add_to_gc_queue(device->seat);
388 sn = udev_device_get_property_value(d, "ID_SEAT");
392 if (!seat_name_is_valid(sn)) {
393 log_warning("Device with invalid seat name %s found, ignoring.", sn);
397 r = manager_add_device(m, udev_device_get_syspath(d), &device);
401 r = manager_add_seat(m, sn, &seat);
409 device_attach(device, seat);
416 int manager_process_button_device(Manager *m, struct udev_device *d) {
423 if (streq_ptr(udev_device_get_action(d), "remove")) {
425 b = hashmap_get(m->buttons, udev_device_get_sysname(d));
434 r = manager_add_button(m, udev_device_get_sysname(d), &b);
438 sn = udev_device_get_property_value(d, "ID_SEAT");
442 button_set_seat(b, sn);
449 int manager_enumerate_devices(Manager *m) {
450 struct udev_list_entry *item = NULL, *first = NULL;
451 struct udev_enumerate *e;
456 /* Loads devices from udev and creates seats for them as
459 e = udev_enumerate_new(m->udev);
465 r = udev_enumerate_add_match_tag(e, "master-of-seat");
469 r = udev_enumerate_scan_devices(e);
473 first = udev_enumerate_get_list_entry(e);
474 udev_list_entry_foreach(item, first) {
475 struct udev_device *d;
478 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
484 k = manager_process_seat_device(m, d);
485 udev_device_unref(d);
493 udev_enumerate_unref(e);
498 int manager_enumerate_buttons(Manager *m) {
499 struct udev_list_entry *item = NULL, *first = NULL;
500 struct udev_enumerate *e;
505 /* Loads buttons from udev */
507 if (m->handle_power_key == HANDLE_IGNORE &&
508 m->handle_suspend_key == HANDLE_IGNORE &&
509 m->handle_hibernate_key == HANDLE_IGNORE &&
510 m->handle_lid_switch == HANDLE_IGNORE)
513 e = udev_enumerate_new(m->udev);
519 r = udev_enumerate_add_match_subsystem(e, "input");
523 r = udev_enumerate_add_match_tag(e, "power-switch");
527 r = udev_enumerate_scan_devices(e);
531 first = udev_enumerate_get_list_entry(e);
532 udev_list_entry_foreach(item, first) {
533 struct udev_device *d;
536 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
542 k = manager_process_button_device(m, d);
543 udev_device_unref(d);
551 udev_enumerate_unref(e);
556 int manager_enumerate_seats(Manager *m) {
563 /* This loads data about seats stored on disk, but does not
564 * actually create any seats. Removes data of seats that no
567 d = opendir("/run/systemd/seats");
572 log_error("Failed to open /run/systemd/seats: %m");
576 while ((de = readdir(d))) {
580 if (!dirent_is_file(de))
583 s = hashmap_get(m->seats, de->d_name);
585 unlinkat(dirfd(d), de->d_name, 0);
599 static int manager_enumerate_users_from_cgroup(Manager *m) {
604 r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_path, &d);
609 log_error("Failed to open %s: %s", m->cgroup_path, strerror(-r));
613 while ((k = cg_read_subgroup(d, &name)) > 0) {
616 k = manager_add_user_by_name(m, name, &user);
623 user_add_to_gc_queue(user);
625 if (!user->cgroup_path)
626 if (asprintf(&user->cgroup_path, "%s/%s", m->cgroup_path, name) < 0) {
643 static int manager_enumerate_linger_users(Manager *m) {
648 d = opendir("/var/lib/systemd/linger");
653 log_error("Failed to open /var/lib/systemd/linger/: %m");
657 while ((de = readdir(d))) {
660 if (!dirent_is_file(de))
663 k = manager_add_user_by_name(m, de->d_name, NULL);
665 log_notice("Couldn't add lingering user %s: %s", de->d_name, strerror(-k));
675 int manager_enumerate_users(Manager *m) {
682 /* First, enumerate user cgroups */
683 r = manager_enumerate_users_from_cgroup(m);
685 /* Second, add lingering users on top */
686 k = manager_enumerate_linger_users(m);
690 /* Third, read in user data stored on disk */
691 d = opendir("/run/systemd/users");
696 log_error("Failed to open /run/systemd/users: %m");
700 while ((de = readdir(d))) {
704 if (!dirent_is_file(de))
707 k = parse_uid(de->d_name, &uid);
709 log_error("Failed to parse file name %s: %s", de->d_name, strerror(-k));
713 u = hashmap_get(m->users, ULONG_TO_PTR(uid));
715 unlinkat(dirfd(d), de->d_name, 0);
729 static int manager_enumerate_sessions_from_cgroup(Manager *m) {
734 HASHMAP_FOREACH(u, m->users, i) {
742 k = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &d);
747 log_error("Failed to open %s: %s", u->cgroup_path, strerror(-k));
752 while ((k = cg_read_subgroup(d, &name)) > 0) {
755 if (streq(name, "shared"))
758 k = manager_add_session(m, u, name, &session);
764 session_add_to_gc_queue(session);
766 if (!session->cgroup_path)
767 if (asprintf(&session->cgroup_path, "%s/%s", u->cgroup_path, name) < 0) {
785 int manager_enumerate_sessions(Manager *m) {
792 /* First enumerate session cgroups */
793 r = manager_enumerate_sessions_from_cgroup(m);
795 /* Second, read in session data stored on disk */
796 d = opendir("/run/systemd/sessions");
801 log_error("Failed to open /run/systemd/sessions: %m");
805 while ((de = readdir(d))) {
809 if (!dirent_is_file(de))
812 s = hashmap_get(m->sessions, de->d_name);
814 unlinkat(dirfd(d), de->d_name, 0);
828 int manager_enumerate_inhibitors(Manager *m) {
835 d = opendir("/run/systemd/inhibit");
840 log_error("Failed to open /run/systemd/inhibit: %m");
844 while ((de = readdir(d))) {
848 if (!dirent_is_file(de))
851 k = manager_add_inhibitor(m, de->d_name, &i);
853 log_notice("Couldn't add inhibitor %s: %s", de->d_name, strerror(-k));
858 k = inhibitor_load(i);
868 int manager_dispatch_seat_udev(Manager *m) {
869 struct udev_device *d;
874 d = udev_monitor_receive_device(m->udev_seat_monitor);
878 r = manager_process_seat_device(m, d);
879 udev_device_unref(d);
884 int manager_dispatch_vcsa_udev(Manager *m) {
885 struct udev_device *d;
891 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
895 name = udev_device_get_sysname(d);
897 /* Whenever a VCSA device is removed try to reallocate our
898 * VTs, to make sure our auto VTs never go away. */
900 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
901 r = seat_preallocate_vts(m->vtconsole);
903 udev_device_unref(d);
908 int manager_dispatch_button_udev(Manager *m) {
909 struct udev_device *d;
914 d = udev_monitor_receive_device(m->udev_button_monitor);
918 r = manager_process_button_device(m, d);
919 udev_device_unref(d);
924 int manager_dispatch_console(Manager *m) {
928 seat_read_active_vt(m->vtconsole);
933 static int vt_is_busy(int vtnr) {
934 struct vt_stat vt_stat;
939 /* We explicitly open /dev/tty1 here instead of /dev/tty0. If
940 * we'd open the latter we'd open the foreground tty which
941 * hence would be unconditionally busy. By opening /dev/tty1
942 * we avoid this. Since tty1 is special and needs to be an
943 * explicitly loaded getty or DM this is safe. */
945 fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC);
949 if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0)
952 r = !!(vt_stat.v_state & (1 << vtnr));
954 close_nointr_nofail(fd);
959 int manager_spawn_autovt(Manager *m, int vtnr) {
962 const char *mode = "fail";
967 if ((unsigned) vtnr > m->n_autovts &&
968 (unsigned) vtnr != m->reserve_vt)
971 if ((unsigned) vtnr != m->reserve_vt) {
972 /* If this is the reserved TTY, we'll start the getty
973 * on it in any case, but otherwise only if it is not
976 r = vt_is_busy(vtnr);
983 if (asprintf(&name, "autovt@tty%i.service", vtnr) < 0) {
984 log_error("Could not allocate service name.");
989 r = bus_method_call_with_reply (
991 "org.freedesktop.systemd1",
992 "/org/freedesktop/systemd1",
993 "org.freedesktop.systemd1.Manager",
997 DBUS_TYPE_STRING, &name,
998 DBUS_TYPE_STRING, &mode,
1007 static int manager_reserve_vt(Manager *m) {
1008 _cleanup_free_ char *p = NULL;
1012 if (m->reserve_vt <= 0)
1015 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
1018 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
1019 if (m->reserve_vt_fd < 0) {
1021 /* Don't complain on VT-less systems */
1022 if (errno != ENOENT)
1023 log_warning("Failed to pin reserved VT: %m");
1030 int manager_get_session_by_cgroup(Manager *m, const char *cgroup, Session **session) {
1038 s = hashmap_get(m->session_cgroups, cgroup);
1044 p = strdupa(cgroup);
1049 e = strrchr(p, '/');
1057 s = hashmap_get(m->session_cgroups, p);
1065 int manager_get_user_by_cgroup(Manager *m, const char *cgroup, User **user) {
1073 u = hashmap_get(m->user_cgroups, cgroup);
1079 p = strdupa(cgroup);
1086 e = strrchr(p, '/');
1094 u = hashmap_get(m->user_cgroups, p);
1102 int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) {
1103 _cleanup_free_ char *p = NULL;
1110 r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &p);
1114 return manager_get_session_by_cgroup(m, p, session);
1117 void manager_cgroup_notify_empty(Manager *m, const char *cgroup) {
1122 r = manager_get_session_by_cgroup(m, cgroup, &s);
1124 session_add_to_gc_queue(s);
1126 r = manager_get_user_by_cgroup(m, cgroup, &u);
1128 user_add_to_gc_queue(u);
1131 static void manager_dispatch_other(Manager *m, int fd) {
1139 s = hashmap_get(m->session_fds, INT_TO_PTR(fd + 1));
1141 assert(s->fifo_fd == fd);
1142 session_remove_fifo(s);
1147 i = hashmap_get(m->inhibitor_fds, INT_TO_PTR(fd + 1));
1149 assert(i->fifo_fd == fd);
1155 b = hashmap_get(m->button_fds, INT_TO_PTR(fd + 1));
1157 assert(b->fd == fd);
1162 assert_not_reached("Got event for unknown fd");
1165 static int manager_connect_bus(Manager *m) {
1168 struct epoll_event ev = {
1175 assert(m->bus_fd < 0);
1177 dbus_error_init(&error);
1179 m->bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
1181 log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error));
1186 if (!dbus_connection_register_object_path(m->bus, "/org/freedesktop/login1", &bus_manager_vtable, m) ||
1187 !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/seat", &bus_seat_vtable, m) ||
1188 !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/session", &bus_session_vtable, m) ||
1189 !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/user", &bus_user_vtable, m) ||
1190 !dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) {
1195 dbus_bus_add_match(m->bus,
1197 "interface='org.freedesktop.systemd1.Agent',"
1198 "member='Released',"
1199 "path='/org/freedesktop/systemd1/agent'",
1202 if (dbus_error_is_set(&error)) {
1203 log_error("Failed to register match: %s", bus_error_message(&error));
1208 r = dbus_bus_request_name(m->bus, "org.freedesktop.login1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error);
1209 if (dbus_error_is_set(&error)) {
1210 log_error("Failed to register name on bus: %s", bus_error_message(&error));
1215 if (r != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
1216 log_error("Failed to acquire name.");
1221 m->bus_fd = bus_loop_open(m->bus);
1222 if (m->bus_fd < 0) {
1227 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->bus_fd, &ev) < 0)
1233 dbus_error_free(&error);
1238 static int manager_connect_console(Manager *m) {
1239 struct epoll_event ev = {
1241 .data.u32 = FD_CONSOLE,
1245 assert(m->console_active_fd < 0);
1247 /* On certain architectures (S390 and Xen, and containers),
1248 /dev/tty0 does not exist, so don't fail if we can't open
1250 if (access("/dev/tty0", F_OK) < 0) {
1251 m->console_active_fd = -1;
1255 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
1256 if (m->console_active_fd < 0) {
1258 /* On some systems the device node /dev/tty0 may exist
1259 * even though /sys/class/tty/tty0 does not. */
1260 if (errno == ENOENT)
1263 log_error("Failed to open /sys/class/tty/tty0/active: %m");
1267 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->console_active_fd, &ev) < 0)
1273 static int manager_connect_udev(Manager *m) {
1275 struct epoll_event ev = {
1277 .data.u32 = FD_SEAT_UDEV,
1281 assert(!m->udev_seat_monitor);
1282 assert(!m->udev_vcsa_monitor);
1283 assert(!m->udev_button_monitor);
1285 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
1286 if (!m->udev_seat_monitor)
1289 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
1293 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
1297 m->udev_seat_fd = udev_monitor_get_fd(m->udev_seat_monitor);
1299 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_seat_fd, &ev) < 0)
1302 /* Don't watch keys if nobody cares */
1303 if (m->handle_power_key != HANDLE_IGNORE ||
1304 m->handle_suspend_key != HANDLE_IGNORE ||
1305 m->handle_hibernate_key != HANDLE_IGNORE ||
1306 m->handle_lid_switch != HANDLE_IGNORE) {
1308 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
1309 if (!m->udev_button_monitor)
1312 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
1316 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
1320 r = udev_monitor_enable_receiving(m->udev_button_monitor);
1324 m->udev_button_fd = udev_monitor_get_fd(m->udev_button_monitor);
1327 ev.events = EPOLLIN;
1328 ev.data.u32 = FD_BUTTON_UDEV;
1329 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_button_fd, &ev) < 0)
1333 /* Don't bother watching VCSA devices, if nobody cares */
1334 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
1336 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
1337 if (!m->udev_vcsa_monitor)
1340 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
1344 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
1348 m->udev_vcsa_fd = udev_monitor_get_fd(m->udev_vcsa_monitor);
1351 ev.events = EPOLLIN;
1352 ev.data.u32 = FD_VCSA_UDEV;
1353 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_vcsa_fd, &ev) < 0)
1360 void manager_gc(Manager *m, bool drop_not_started) {
1367 while ((seat = m->seat_gc_queue)) {
1368 LIST_REMOVE(Seat, gc_queue, m->seat_gc_queue, seat);
1369 seat->in_gc_queue = false;
1371 if (seat_check_gc(seat, drop_not_started) == 0) {
1377 while ((session = m->session_gc_queue)) {
1378 LIST_REMOVE(Session, gc_queue, m->session_gc_queue, session);
1379 session->in_gc_queue = false;
1381 if (session_check_gc(session, drop_not_started) == 0) {
1382 session_stop(session);
1383 session_free(session);
1387 while ((user = m->user_gc_queue)) {
1388 LIST_REMOVE(User, gc_queue, m->user_gc_queue, user);
1389 user->in_gc_queue = false;
1391 if (user_check_gc(user, drop_not_started) == 0) {
1398 int manager_get_idle_hint(Manager *m, dual_timestamp *t) {
1401 dual_timestamp ts = { 0, 0 };
1406 idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0);
1408 HASHMAP_FOREACH(s, m->sessions, i) {
1412 ih = session_get_idle_hint(s, &k);
1418 if (k.monotonic < ts.monotonic)
1424 } else if (idle_hint) {
1426 if (k.monotonic > ts.monotonic)
1437 int manager_dispatch_idle_action(Manager *m) {
1438 struct dual_timestamp since;
1439 struct itimerspec its = {};
1445 if (m->idle_action == HANDLE_IGNORE ||
1446 m->idle_action_usec <= 0) {
1451 n = now(CLOCK_MONOTONIC);
1453 r = manager_get_idle_hint(m, &since);
1455 /* Not idle. Let's check if after a timeout it might be idle then. */
1456 timespec_store(&its.it_value, n + m->idle_action_usec);
1458 /* Idle! Let's see if it's time to do something, or if
1459 * we shall sleep for longer. */
1461 if (n >= since.monotonic + m->idle_action_usec &&
1462 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1463 log_info("System idle. Taking action.");
1465 manager_handle_action(m, 0, m->idle_action, false, false);
1466 m->idle_action_not_before_usec = n;
1469 timespec_store(&its.it_value, MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec);
1472 if (m->idle_action_fd < 0) {
1473 struct epoll_event ev = {
1475 .data.u32 = FD_IDLE_ACTION,
1478 m->idle_action_fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC);
1479 if (m->idle_action_fd < 0) {
1480 log_error("Failed to create idle action timer: %m");
1485 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->idle_action_fd, &ev) < 0) {
1486 log_error("Failed to add idle action timer to epoll: %m");
1492 if (timerfd_settime(m->idle_action_fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
1493 log_error("Failed to reset timerfd: %m");
1501 if (m->idle_action_fd >= 0) {
1502 close_nointr_nofail(m->idle_action_fd);
1503 m->idle_action_fd = -1;
1508 int manager_startup(Manager *m) {
1513 Inhibitor *inhibitor;
1517 assert(m->epoll_fd <= 0);
1519 cg_shorten_controllers(m->reset_controllers);
1520 cg_shorten_controllers(m->controllers);
1522 m->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
1523 if (m->epoll_fd < 0)
1526 /* Connect to console */
1527 r = manager_connect_console(m);
1531 /* Connect to udev */
1532 r = manager_connect_udev(m);
1536 /* Connect to the bus */
1537 r = manager_connect_bus(m);
1541 /* Instantiate magic seat 0 */
1542 r = manager_add_seat(m, "seat0", &m->vtconsole);
1546 /* Deserialize state */
1547 manager_enumerate_devices(m);
1548 manager_enumerate_seats(m);
1549 manager_enumerate_users(m);
1550 manager_enumerate_sessions(m);
1551 manager_enumerate_inhibitors(m);
1552 manager_enumerate_buttons(m);
1554 /* Remove stale objects before we start them */
1555 manager_gc(m, false);
1557 /* Reserve the special reserved VT */
1558 manager_reserve_vt(m);
1560 /* And start everything */
1561 HASHMAP_FOREACH(seat, m->seats, i)
1564 HASHMAP_FOREACH(user, m->users, i)
1567 HASHMAP_FOREACH(session, m->sessions, i)
1568 session_start(session);
1570 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1571 inhibitor_start(inhibitor);
1573 manager_dispatch_idle_action(m);
1578 static int manager_recheck_buttons(Manager *m) {
1585 HASHMAP_FOREACH(b, m->buttons, i) {
1588 q = button_recheck(b);
1598 int manager_run(Manager *m) {
1602 struct epoll_event event;
1606 manager_gc(m, true);
1608 if (manager_dispatch_delayed(m) > 0)
1611 if (manager_recheck_buttons(m) > 0)
1614 if (dbus_connection_dispatch(m->bus) != DBUS_DISPATCH_COMPLETE)
1617 manager_gc(m, true);
1619 if (m->action_what != 0) {
1622 x = now(CLOCK_MONOTONIC);
1623 y = m->action_timestamp + m->inhibit_delay_max;
1625 msec = x >= y ? 0 : (int) ((y - x) / USEC_PER_MSEC);
1628 n = epoll_wait(m->epoll_fd, &event, 1, msec);
1630 if (errno == EINTR || errno == EAGAIN)
1633 log_error("epoll() failed: %m");
1640 switch (event.data.u32) {
1643 manager_dispatch_seat_udev(m);
1647 manager_dispatch_vcsa_udev(m);
1650 case FD_BUTTON_UDEV:
1651 manager_dispatch_button_udev(m);
1655 manager_dispatch_console(m);
1658 case FD_IDLE_ACTION:
1659 manager_dispatch_idle_action(m);
1663 bus_loop_dispatch(m->bus_fd);
1667 if (event.data.u32 >= FD_OTHER_BASE)
1668 manager_dispatch_other(m, event.data.u32 - FD_OTHER_BASE);
1675 static int manager_parse_config_file(Manager *m) {
1682 fn = "/etc/systemd/logind.conf";
1683 f = fopen(fn, "re");
1685 if (errno == ENOENT)
1688 log_warning("Failed to open configuration file %s: %m", fn);
1692 r = config_parse(NULL, fn, f, "Login\0", config_item_perf_lookup, (void*) logind_gperf_lookup, false, m);
1694 log_warning("Failed to parse configuration file: %s", strerror(-r));
1701 int main(int argc, char *argv[]) {
1705 log_set_target(LOG_TARGET_AUTO);
1706 log_set_facility(LOG_AUTH);
1707 log_parse_environment();
1713 log_error("This program takes no arguments.");
1718 /* Always create the directories people can create inotify
1719 * watches in. Note that some applications might check for the
1720 * existence of /run/systemd/seats/ to determine whether
1721 * logind is available, so please always make sure this check
1723 mkdir_label("/run/systemd/seats", 0755);
1724 mkdir_label("/run/systemd/users", 0755);
1725 mkdir_label("/run/systemd/sessions", 0755);
1733 manager_parse_config_file(m);
1735 r = manager_startup(m);
1737 log_error("Failed to fully start up daemon: %s", strerror(-r));
1741 log_debug("systemd-logind running as pid %lu", (unsigned long) getpid());
1745 "STATUS=Processing requests...");
1749 log_debug("systemd-logind stopped as pid %lu", (unsigned long) getpid());
1753 "STATUS=Shutting down...");
1758 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;