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) {
1110 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &p);
1114 r = manager_get_session_by_cgroup(m, p, session);
1120 void manager_cgroup_notify_empty(Manager *m, const char *cgroup) {
1125 r = manager_get_session_by_cgroup(m, cgroup, &s);
1127 session_add_to_gc_queue(s);
1129 r = manager_get_user_by_cgroup(m, cgroup, &u);
1131 user_add_to_gc_queue(u);
1134 static void manager_dispatch_other(Manager *m, int fd) {
1142 s = hashmap_get(m->session_fds, INT_TO_PTR(fd + 1));
1144 assert(s->fifo_fd == fd);
1145 session_remove_fifo(s);
1150 i = hashmap_get(m->inhibitor_fds, INT_TO_PTR(fd + 1));
1152 assert(i->fifo_fd == fd);
1158 b = hashmap_get(m->button_fds, INT_TO_PTR(fd + 1));
1160 assert(b->fd == fd);
1165 assert_not_reached("Got event for unknown fd");
1168 static int manager_connect_bus(Manager *m) {
1171 struct epoll_event ev = {
1178 assert(m->bus_fd < 0);
1180 dbus_error_init(&error);
1182 m->bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
1184 log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error));
1189 if (!dbus_connection_register_object_path(m->bus, "/org/freedesktop/login1", &bus_manager_vtable, m) ||
1190 !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/seat", &bus_seat_vtable, m) ||
1191 !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/session", &bus_session_vtable, m) ||
1192 !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/user", &bus_user_vtable, m) ||
1193 !dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) {
1198 dbus_bus_add_match(m->bus,
1200 "interface='org.freedesktop.systemd1.Agent',"
1201 "member='Released',"
1202 "path='/org/freedesktop/systemd1/agent'",
1205 if (dbus_error_is_set(&error)) {
1206 log_error("Failed to register match: %s", bus_error_message(&error));
1211 r = dbus_bus_request_name(m->bus, "org.freedesktop.login1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error);
1212 if (dbus_error_is_set(&error)) {
1213 log_error("Failed to register name on bus: %s", bus_error_message(&error));
1218 if (r != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
1219 log_error("Failed to acquire name.");
1224 m->bus_fd = bus_loop_open(m->bus);
1225 if (m->bus_fd < 0) {
1230 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->bus_fd, &ev) < 0)
1236 dbus_error_free(&error);
1241 static int manager_connect_console(Manager *m) {
1242 struct epoll_event ev = {
1244 .data.u32 = FD_CONSOLE,
1248 assert(m->console_active_fd < 0);
1250 /* On certain architectures (S390 and Xen, and containers),
1251 /dev/tty0 does not exist, so don't fail if we can't open
1253 if (access("/dev/tty0", F_OK) < 0) {
1254 m->console_active_fd = -1;
1258 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
1259 if (m->console_active_fd < 0) {
1261 /* On some systems the device node /dev/tty0 may exist
1262 * even though /sys/class/tty/tty0 does not. */
1263 if (errno == ENOENT)
1266 log_error("Failed to open /sys/class/tty/tty0/active: %m");
1270 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->console_active_fd, &ev) < 0)
1276 static int manager_connect_udev(Manager *m) {
1278 struct epoll_event ev = {
1280 .data.u32 = FD_SEAT_UDEV,
1284 assert(!m->udev_seat_monitor);
1285 assert(!m->udev_vcsa_monitor);
1286 assert(!m->udev_button_monitor);
1288 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
1289 if (!m->udev_seat_monitor)
1292 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
1296 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
1300 m->udev_seat_fd = udev_monitor_get_fd(m->udev_seat_monitor);
1302 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_seat_fd, &ev) < 0)
1305 /* Don't watch keys if nobody cares */
1306 if (m->handle_power_key != HANDLE_IGNORE ||
1307 m->handle_suspend_key != HANDLE_IGNORE ||
1308 m->handle_hibernate_key != HANDLE_IGNORE ||
1309 m->handle_lid_switch != HANDLE_IGNORE) {
1311 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
1312 if (!m->udev_button_monitor)
1315 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
1319 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
1323 r = udev_monitor_enable_receiving(m->udev_button_monitor);
1327 m->udev_button_fd = udev_monitor_get_fd(m->udev_button_monitor);
1330 ev.events = EPOLLIN;
1331 ev.data.u32 = FD_BUTTON_UDEV;
1332 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_button_fd, &ev) < 0)
1336 /* Don't bother watching VCSA devices, if nobody cares */
1337 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
1339 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
1340 if (!m->udev_vcsa_monitor)
1343 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
1347 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
1351 m->udev_vcsa_fd = udev_monitor_get_fd(m->udev_vcsa_monitor);
1354 ev.events = EPOLLIN;
1355 ev.data.u32 = FD_VCSA_UDEV;
1356 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_vcsa_fd, &ev) < 0)
1363 void manager_gc(Manager *m, bool drop_not_started) {
1370 while ((seat = m->seat_gc_queue)) {
1371 LIST_REMOVE(Seat, gc_queue, m->seat_gc_queue, seat);
1372 seat->in_gc_queue = false;
1374 if (seat_check_gc(seat, drop_not_started) == 0) {
1380 while ((session = m->session_gc_queue)) {
1381 LIST_REMOVE(Session, gc_queue, m->session_gc_queue, session);
1382 session->in_gc_queue = false;
1384 if (session_check_gc(session, drop_not_started) == 0) {
1385 session_stop(session);
1386 session_free(session);
1390 while ((user = m->user_gc_queue)) {
1391 LIST_REMOVE(User, gc_queue, m->user_gc_queue, user);
1392 user->in_gc_queue = false;
1394 if (user_check_gc(user, drop_not_started) == 0) {
1401 int manager_get_idle_hint(Manager *m, dual_timestamp *t) {
1404 dual_timestamp ts = { 0, 0 };
1409 idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0);
1411 HASHMAP_FOREACH(s, m->sessions, i) {
1415 ih = session_get_idle_hint(s, &k);
1421 if (k.monotonic < ts.monotonic)
1427 } else if (idle_hint) {
1429 if (k.monotonic > ts.monotonic)
1440 int manager_dispatch_idle_action(Manager *m) {
1441 struct dual_timestamp since;
1442 struct itimerspec its = {};
1448 if (m->idle_action == HANDLE_IGNORE ||
1449 m->idle_action_usec <= 0) {
1454 n = now(CLOCK_MONOTONIC);
1456 r = manager_get_idle_hint(m, &since);
1458 /* Not idle. Let's check if after a timeout it might be idle then. */
1459 timespec_store(&its.it_value, n + m->idle_action_usec);
1461 /* Idle! Let's see if it's time to do something, or if
1462 * we shall sleep for longer. */
1464 if (n >= since.monotonic + m->idle_action_usec &&
1465 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1466 log_info("System idle. Taking action.");
1468 manager_handle_action(m, 0, m->idle_action, false, false);
1469 m->idle_action_not_before_usec = n;
1472 timespec_store(&its.it_value, MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec);
1475 if (m->idle_action_fd < 0) {
1476 struct epoll_event ev = {
1478 .data.u32 = FD_IDLE_ACTION,
1481 m->idle_action_fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC);
1482 if (m->idle_action_fd < 0) {
1483 log_error("Failed to create idle action timer: %m");
1488 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->idle_action_fd, &ev) < 0) {
1489 log_error("Failed to add idle action timer to epoll: %m");
1495 if (timerfd_settime(m->idle_action_fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
1496 log_error("Failed to reset timerfd: %m");
1504 if (m->idle_action_fd >= 0) {
1505 close_nointr_nofail(m->idle_action_fd);
1506 m->idle_action_fd = -1;
1511 int manager_startup(Manager *m) {
1516 Inhibitor *inhibitor;
1520 assert(m->epoll_fd <= 0);
1522 cg_shorten_controllers(m->reset_controllers);
1523 cg_shorten_controllers(m->controllers);
1525 m->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
1526 if (m->epoll_fd < 0)
1529 /* Connect to console */
1530 r = manager_connect_console(m);
1534 /* Connect to udev */
1535 r = manager_connect_udev(m);
1539 /* Connect to the bus */
1540 r = manager_connect_bus(m);
1544 /* Instantiate magic seat 0 */
1545 r = manager_add_seat(m, "seat0", &m->vtconsole);
1549 /* Deserialize state */
1550 manager_enumerate_devices(m);
1551 manager_enumerate_seats(m);
1552 manager_enumerate_users(m);
1553 manager_enumerate_sessions(m);
1554 manager_enumerate_inhibitors(m);
1555 manager_enumerate_buttons(m);
1557 /* Remove stale objects before we start them */
1558 manager_gc(m, false);
1560 /* Reserve the special reserved VT */
1561 manager_reserve_vt(m);
1563 /* And start everything */
1564 HASHMAP_FOREACH(seat, m->seats, i)
1567 HASHMAP_FOREACH(user, m->users, i)
1570 HASHMAP_FOREACH(session, m->sessions, i)
1571 session_start(session);
1573 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1574 inhibitor_start(inhibitor);
1576 manager_dispatch_idle_action(m);
1581 static int manager_recheck_buttons(Manager *m) {
1588 HASHMAP_FOREACH(b, m->buttons, i) {
1591 q = button_recheck(b);
1601 int manager_run(Manager *m) {
1605 struct epoll_event event;
1609 manager_gc(m, true);
1611 if (manager_dispatch_delayed(m) > 0)
1614 if (manager_recheck_buttons(m) > 0)
1617 if (dbus_connection_dispatch(m->bus) != DBUS_DISPATCH_COMPLETE)
1620 manager_gc(m, true);
1622 if (m->action_what != 0) {
1625 x = now(CLOCK_MONOTONIC);
1626 y = m->action_timestamp + m->inhibit_delay_max;
1628 msec = x >= y ? 0 : (int) ((y - x) / USEC_PER_MSEC);
1631 n = epoll_wait(m->epoll_fd, &event, 1, msec);
1633 if (errno == EINTR || errno == EAGAIN)
1636 log_error("epoll() failed: %m");
1643 switch (event.data.u32) {
1646 manager_dispatch_seat_udev(m);
1650 manager_dispatch_vcsa_udev(m);
1653 case FD_BUTTON_UDEV:
1654 manager_dispatch_button_udev(m);
1658 manager_dispatch_console(m);
1661 case FD_IDLE_ACTION:
1662 manager_dispatch_idle_action(m);
1666 bus_loop_dispatch(m->bus_fd);
1670 if (event.data.u32 >= FD_OTHER_BASE)
1671 manager_dispatch_other(m, event.data.u32 - FD_OTHER_BASE);
1678 static int manager_parse_config_file(Manager *m) {
1685 fn = "/etc/systemd/logind.conf";
1686 f = fopen(fn, "re");
1688 if (errno == ENOENT)
1691 log_warning("Failed to open configuration file %s: %m", fn);
1695 r = config_parse(fn, f, "Login\0", config_item_perf_lookup, (void*) logind_gperf_lookup, false, m);
1697 log_warning("Failed to parse configuration file: %s", strerror(-r));
1704 int main(int argc, char *argv[]) {
1708 log_set_target(LOG_TARGET_AUTO);
1709 log_set_facility(LOG_AUTH);
1710 log_parse_environment();
1716 log_error("This program takes no arguments.");
1721 /* Always create the directories people can create inotify
1722 * watches in. Note that some applications might check for the
1723 * existence of /run/systemd/seats/ to determine whether
1724 * logind is available, so please always make sure this check
1726 mkdir_label("/run/systemd/seats", 0755);
1727 mkdir_label("/run/systemd/users", 0755);
1728 mkdir_label("/run/systemd/sessions", 0755);
1736 manager_parse_config_file(m);
1738 r = manager_startup(m);
1740 log_error("Failed to fully start up daemon: %s", strerror(-r));
1744 log_debug("systemd-logind running as pid %lu", (unsigned long) getpid());
1748 "STATUS=Processing requests...");
1752 log_debug("systemd-logind stopped as pid %lu", (unsigned long) getpid());
1756 "STATUS=Shutting down...");
1761 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;