| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "sd-daemon.h" |
| #include "sd-device.h" |
| |
| #include "alloc-util.h" |
| #include "bus-error.h" |
| #include "bus-locator.h" |
| #include "bus-log-control-api.h" |
| #include "bus-polkit.h" |
| #include "cgroup-util.h" |
| #include "constants.h" |
| #include "daemon-util.h" |
| #include "device-util.h" |
| #include "dirent-util.h" |
| #include "escape.h" |
| #include "fd-util.h" |
| #include "format-util.h" |
| #include "fs-util.h" |
| #include "logind-dbus.h" |
| #include "logind-seat-dbus.h" |
| #include "logind-session-dbus.h" |
| #include "logind-user-dbus.h" |
| #include "logind.h" |
| #include "main-func.h" |
| #include "mkdir-label.h" |
| #include "parse-util.h" |
| #include "process-util.h" |
| #include "selinux-util.h" |
| #include "service-util.h" |
| #include "signal-util.h" |
| #include "strv.h" |
| #include "terminal-util.h" |
| #include "udev-util.h" |
| #include "user-util.h" |
| |
| static Manager* manager_unref(Manager *m); |
| DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref); |
| |
| static int manager_new(Manager **ret) { |
| _cleanup_(manager_unrefp) Manager *m = NULL; |
| int r; |
| |
| assert(ret); |
| |
| m = new(Manager, 1); |
| if (!m) |
| return -ENOMEM; |
| |
| *m = (Manager) { |
| .console_active_fd = -EBADF, |
| .reserve_vt_fd = -EBADF, |
| .enable_wall_messages = true, |
| .idle_action_not_before_usec = now(CLOCK_MONOTONIC), |
| }; |
| |
| m->devices = hashmap_new(&string_hash_ops); |
| m->seats = hashmap_new(&string_hash_ops); |
| m->sessions = hashmap_new(&string_hash_ops); |
| m->sessions_by_leader = hashmap_new(NULL); |
| m->users = hashmap_new(NULL); |
| m->inhibitors = hashmap_new(&string_hash_ops); |
| m->buttons = hashmap_new(&string_hash_ops); |
| |
| m->user_units = hashmap_new(&string_hash_ops); |
| m->session_units = hashmap_new(&string_hash_ops); |
| |
| if (!m->devices || !m->seats || !m->sessions || !m->sessions_by_leader || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units) |
| return -ENOMEM; |
| |
| r = sd_event_default(&m->event); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); |
| if (r < 0) |
| return r; |
| |
| (void) sd_event_set_watchdog(m->event, true); |
| |
| manager_reset_config(m); |
| |
| *ret = TAKE_PTR(m); |
| return 0; |
| } |
| |
| static Manager* manager_unref(Manager *m) { |
| Session *session; |
| User *u; |
| Device *d; |
| Seat *s; |
| Inhibitor *i; |
| Button *b; |
| |
| if (!m) |
| return NULL; |
| |
| while ((session = hashmap_first(m->sessions))) |
| session_free(session); |
| |
| while ((u = hashmap_first(m->users))) |
| user_free(u); |
| |
| while ((d = hashmap_first(m->devices))) |
| device_free(d); |
| |
| while ((s = hashmap_first(m->seats))) |
| seat_free(s); |
| |
| while ((i = hashmap_first(m->inhibitors))) |
| inhibitor_free(i); |
| |
| while ((b = hashmap_first(m->buttons))) |
| button_free(b); |
| |
| hashmap_free(m->devices); |
| hashmap_free(m->seats); |
| hashmap_free(m->sessions); |
| hashmap_free(m->sessions_by_leader); |
| hashmap_free(m->users); |
| hashmap_free(m->inhibitors); |
| hashmap_free(m->buttons); |
| hashmap_free(m->brightness_writers); |
| |
| hashmap_free(m->user_units); |
| hashmap_free(m->session_units); |
| |
| sd_event_source_unref(m->idle_action_event_source); |
| sd_event_source_unref(m->inhibit_timeout_source); |
| sd_event_source_unref(m->scheduled_shutdown_timeout_source); |
| sd_event_source_unref(m->nologin_timeout_source); |
| sd_event_source_unref(m->wall_message_timeout_source); |
| |
| sd_event_source_unref(m->console_active_event_source); |
| sd_event_source_unref(m->lid_switch_ignore_event_source); |
| |
| sd_event_source_unref(m->reboot_key_long_press_event_source); |
| |
| #if ENABLE_UTMP |
| sd_event_source_unref(m->utmp_event_source); |
| #endif |
| |
| safe_close(m->console_active_fd); |
| |
| sd_device_monitor_unref(m->device_seat_monitor); |
| sd_device_monitor_unref(m->device_monitor); |
| sd_device_monitor_unref(m->device_vcsa_monitor); |
| sd_device_monitor_unref(m->device_button_monitor); |
| |
| if (m->unlink_nologin) |
| (void) unlink_or_warn("/run/nologin"); |
| |
| bus_verify_polkit_async_registry_free(m->polkit_registry); |
| |
| sd_bus_flush_close_unref(m->bus); |
| sd_event_unref(m->event); |
| |
| safe_close(m->reserve_vt_fd); |
| |
| strv_free(m->kill_only_users); |
| strv_free(m->kill_exclude_users); |
| |
| free(m->scheduled_shutdown_tty); |
| free(m->wall_message); |
| free(m->action_job); |
| |
| strv_free(m->efi_boot_loader_entries); |
| free(m->efi_loader_entry_one_shot); |
| |
| return mfree(m); |
| } |
| |
| static int manager_enumerate_devices(Manager *m) { |
| _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; |
| sd_device *d; |
| int r; |
| |
| assert(m); |
| |
| /* Loads devices from udev and creates seats for them as |
| * necessary */ |
| |
| r = sd_device_enumerator_new(&e); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_enumerator_add_match_tag(e, "master-of-seat"); |
| if (r < 0) |
| return r; |
| |
| FOREACH_DEVICE(e, d) { |
| int k; |
| |
| k = manager_process_seat_device(m, d); |
| if (k < 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static int manager_enumerate_buttons(Manager *m) { |
| _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; |
| sd_device *d; |
| int r; |
| |
| assert(m); |
| |
| /* Loads buttons from udev */ |
| |
| if (manager_all_buttons_ignored(m)) |
| return 0; |
| |
| r = sd_device_enumerator_new(&e); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_enumerator_add_match_subsystem(e, "input", true); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_enumerator_add_match_tag(e, "power-switch"); |
| if (r < 0) |
| return r; |
| |
| FOREACH_DEVICE(e, d) { |
| int k; |
| |
| k = manager_process_button_device(m, d); |
| if (k < 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static int manager_enumerate_seats(Manager *m) { |
| _cleanup_closedir_ DIR *d = NULL; |
| int r = 0; |
| |
| assert(m); |
| |
| /* This loads data about seats stored on disk, but does not |
| * actually create any seats. Removes data of seats that no |
| * longer exist. */ |
| |
| d = opendir("/run/systemd/seats"); |
| if (!d) { |
| if (errno == ENOENT) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to open /run/systemd/seats: %m"); |
| } |
| |
| FOREACH_DIRENT(de, d, return -errno) { |
| Seat *s; |
| int k; |
| |
| if (!dirent_is_file(de)) |
| continue; |
| |
| s = hashmap_get(m->seats, de->d_name); |
| if (!s) { |
| if (unlinkat(dirfd(d), de->d_name, 0) < 0) |
| log_warning_errno(errno, "Failed to remove /run/systemd/seats/%s, ignoring: %m", |
| de->d_name); |
| continue; |
| } |
| |
| k = seat_load(s); |
| if (k < 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static int manager_enumerate_linger_users(Manager *m) { |
| _cleanup_closedir_ DIR *d = NULL; |
| int r = 0; |
| |
| assert(m); |
| |
| d = opendir("/var/lib/systemd/linger"); |
| if (!d) { |
| if (errno == ENOENT) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m"); |
| } |
| |
| FOREACH_DIRENT(de, d, return -errno) { |
| int k; |
| _cleanup_free_ char *n = NULL; |
| |
| if (!dirent_is_file(de)) |
| continue; |
| k = cunescape(de->d_name, 0, &n); |
| if (k < 0) { |
| r = log_warning_errno(k, "Failed to unescape username '%s', ignoring: %m", de->d_name); |
| continue; |
| } |
| k = manager_add_user_by_name(m, n, NULL); |
| if (k < 0) |
| r = log_warning_errno(k, "Couldn't add lingering user %s, ignoring: %m", de->d_name); |
| } |
| |
| return r; |
| } |
| |
| static int manager_enumerate_users(Manager *m) { |
| _cleanup_closedir_ DIR *d = NULL; |
| int r, k; |
| |
| assert(m); |
| |
| /* Add lingering users */ |
| r = manager_enumerate_linger_users(m); |
| |
| /* Read in user data stored on disk */ |
| d = opendir("/run/systemd/users"); |
| if (!d) { |
| if (errno == ENOENT) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to open /run/systemd/users: %m"); |
| } |
| |
| FOREACH_DIRENT(de, d, return -errno) { |
| User *u; |
| uid_t uid; |
| |
| if (!dirent_is_file(de)) |
| continue; |
| |
| k = parse_uid(de->d_name, &uid); |
| if (k < 0) { |
| r = log_warning_errno(k, "Failed to parse filename /run/systemd/users/%s as UID.", de->d_name); |
| continue; |
| } |
| |
| k = manager_add_user_by_uid(m, uid, &u); |
| if (k < 0) { |
| r = log_warning_errno(k, "Failed to add user by file name %s, ignoring: %m", de->d_name); |
| continue; |
| } |
| |
| user_add_to_gc_queue(u); |
| |
| k = user_load(u); |
| if (k < 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static int parse_fdname(const char *fdname, char **session_id, dev_t *dev) { |
| _cleanup_strv_free_ char **parts = NULL; |
| _cleanup_free_ char *id = NULL; |
| unsigned major, minor; |
| int r; |
| |
| parts = strv_split(fdname, "-"); |
| if (!parts) |
| return -ENOMEM; |
| if (strv_length(parts) != 5) |
| return -EINVAL; |
| |
| if (!streq(parts[0], "session")) |
| return -EINVAL; |
| |
| id = strdup(parts[1]); |
| if (!id) |
| return -ENOMEM; |
| |
| if (!streq(parts[2], "device")) |
| return -EINVAL; |
| |
| r = safe_atou(parts[3], &major); |
| if (r < 0) |
| return r; |
| r = safe_atou(parts[4], &minor); |
| if (r < 0) |
| return r; |
| |
| *dev = makedev(major, minor); |
| *session_id = TAKE_PTR(id); |
| |
| return 0; |
| } |
| |
| static int deliver_fd(Manager *m, const char *fdname, int fd) { |
| _cleanup_free_ char *id = NULL; |
| SessionDevice *sd; |
| struct stat st; |
| Session *s; |
| dev_t dev; |
| int r; |
| |
| assert(m); |
| assert(fd >= 0); |
| |
| r = parse_fdname(fdname, &id, &dev); |
| if (r < 0) |
| return log_debug_errno(r, "Failed to parse fd name %s: %m", fdname); |
| |
| s = hashmap_get(m->sessions, id); |
| if (!s) |
| /* If the session doesn't exist anymore, the associated session device attached to this fd |
| * doesn't either. Let's simply close this fd. */ |
| return log_debug_errno(SYNTHETIC_ERRNO(ENXIO), "Failed to attach fd for unknown session: %s", id); |
| |
| if (fstat(fd, &st) < 0) |
| /* The device is allowed to go away at a random point, in which case fstat() failing is |
| * expected. */ |
| return log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id); |
| |
| if (!S_ISCHR(st.st_mode) || st.st_rdev != dev) |
| return log_debug_errno(SYNTHETIC_ERRNO(ENODEV), "Device fd doesn't point to the expected character device node"); |
| |
| sd = hashmap_get(s->devices, &dev); |
| if (!sd) |
| /* Weird, we got an fd for a session device which wasn't recorded in the session state |
| * file... */ |
| return log_warning_errno(SYNTHETIC_ERRNO(ENODEV), "Got fd for missing session device [%u:%u] in session %s", |
| major(dev), minor(dev), s->id); |
| |
| log_debug("Attaching fd to session device [%u:%u] for session %s", |
| major(dev), minor(dev), s->id); |
| |
| session_device_attach_fd(sd, fd, s->was_active); |
| return 0; |
| } |
| |
| static int manager_attach_fds(Manager *m) { |
| _cleanup_strv_free_ char **fdnames = NULL; |
| int n; |
| |
| /* Upon restart, PID1 will send us back all fds of session devices that we previously opened. Each |
| * file descriptor is associated with a given session. The session ids are passed through FDNAMES. */ |
| |
| n = sd_listen_fds_with_names(true, &fdnames); |
| if (n < 0) |
| return log_warning_errno(n, "Failed to acquire passed fd list: %m"); |
| if (n == 0) |
| return 0; |
| |
| for (int i = 0; i < n; i++) { |
| int fd = SD_LISTEN_FDS_START + i; |
| |
| if (deliver_fd(m, fdnames[i], fd) >= 0) |
| continue; |
| |
| /* Hmm, we couldn't deliver the fd to any session device object? If so, let's close the fd |
| * and remove it from fdstore. */ |
| close_and_notify_warn(fd, fdnames[i]); |
| } |
| |
| return 0; |
| } |
| |
| static int manager_enumerate_sessions(Manager *m) { |
| _cleanup_closedir_ DIR *d = NULL; |
| int r = 0, k; |
| |
| assert(m); |
| |
| /* Read in session data stored on disk */ |
| d = opendir("/run/systemd/sessions"); |
| if (!d) { |
| if (errno == ENOENT) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m"); |
| } |
| |
| FOREACH_DIRENT(de, d, return -errno) { |
| struct Session *s; |
| |
| if (!dirent_is_file(de)) |
| continue; |
| |
| k = manager_add_session(m, de->d_name, &s); |
| if (k < 0) { |
| r = log_warning_errno(k, "Failed to add session by file name %s, ignoring: %m", de->d_name); |
| continue; |
| } |
| |
| session_add_to_gc_queue(s); |
| |
| k = session_load(s); |
| if (k < 0) |
| r = k; |
| } |
| |
| /* We might be restarted and PID1 could have sent us back the session device fds we previously |
| * saved. */ |
| (void) manager_attach_fds(m); |
| |
| return r; |
| } |
| |
| static int manager_enumerate_inhibitors(Manager *m) { |
| _cleanup_closedir_ DIR *d = NULL; |
| int r = 0; |
| |
| assert(m); |
| |
| d = opendir("/run/systemd/inhibit"); |
| if (!d) { |
| if (errno == ENOENT) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m"); |
| } |
| |
| FOREACH_DIRENT(de, d, return -errno) { |
| int k; |
| Inhibitor *i; |
| |
| if (!dirent_is_file(de)) |
| continue; |
| |
| k = manager_add_inhibitor(m, de->d_name, &i); |
| if (k < 0) { |
| r = log_warning_errno(k, "Couldn't add inhibitor %s, ignoring: %m", de->d_name); |
| continue; |
| } |
| |
| k = inhibitor_load(i); |
| if (k < 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static int manager_dispatch_seat_udev(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
| Manager *m = ASSERT_PTR(userdata); |
| |
| assert(device); |
| |
| manager_process_seat_device(m, device); |
| return 0; |
| } |
| |
| static int manager_dispatch_device_udev(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
| Manager *m = ASSERT_PTR(userdata); |
| |
| assert(device); |
| |
| manager_process_seat_device(m, device); |
| return 0; |
| } |
| |
| static int manager_dispatch_vcsa_udev(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
| Manager *m = ASSERT_PTR(userdata); |
| const char *name; |
| |
| assert(device); |
| |
| /* Whenever a VCSA device is removed try to reallocate our |
| * VTs, to make sure our auto VTs never go away. */ |
| |
| if (sd_device_get_sysname(device, &name) >= 0 && |
| startswith(name, "vcsa") && |
| device_for_action(device, SD_DEVICE_REMOVE)) |
| seat_preallocate_vts(m->seat0); |
| |
| return 0; |
| } |
| |
| static int manager_dispatch_button_udev(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
| Manager *m = ASSERT_PTR(userdata); |
| |
| assert(device); |
| |
| manager_process_button_device(m, device); |
| return 0; |
| } |
| |
| static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
| Manager *m = ASSERT_PTR(userdata); |
| |
| assert(m->seat0); |
| assert(m->console_active_fd == fd); |
| |
| seat_read_active_vt(m->seat0); |
| return 0; |
| } |
| |
| static int manager_reserve_vt(Manager *m) { |
| _cleanup_free_ char *p = NULL; |
| |
| assert(m); |
| |
| if (m->reserve_vt <= 0) |
| return 0; |
| |
| if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0) |
| return log_oom(); |
| |
| m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK); |
| if (m->reserve_vt_fd < 0) { |
| |
| /* Don't complain on VT-less systems */ |
| if (errno != ENOENT) |
| log_warning_errno(errno, "Failed to pin reserved VT: %m"); |
| return -errno; |
| } |
| |
| return 0; |
| } |
| |
| static int manager_connect_bus(Manager *m) { |
| int r; |
| |
| assert(m); |
| assert(!m->bus); |
| |
| r = sd_bus_default_system(&m->bus); |
| if (r < 0) |
| return log_error_errno(r, "Failed to connect to system bus: %m"); |
| |
| r = bus_add_implementation(m->bus, &manager_object, m); |
| if (r < 0) |
| return r; |
| |
| r = bus_log_control_api_register(m->bus); |
| if (r < 0) |
| return r; |
| |
| r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "JobRemoved", match_job_removed, NULL, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to request match for JobRemoved: %m"); |
| |
| r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "UnitRemoved", match_unit_removed, NULL, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to request match for UnitRemoved: %m"); |
| |
| r = sd_bus_match_signal_async( |
| m->bus, |
| NULL, |
| "org.freedesktop.systemd1", |
| NULL, |
| "org.freedesktop.DBus.Properties", |
| "PropertiesChanged", |
| match_properties_changed, NULL, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to request match for PropertiesChanged: %m"); |
| |
| r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "Reloading", match_reloading, NULL, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to request match for Reloading: %m"); |
| |
| r = bus_call_method_async(m->bus, NULL, bus_systemd_mgr, "Subscribe", NULL, NULL, NULL); |
| if (r < 0) |
| return log_error_errno(r, "Failed to enable subscription: %m"); |
| |
| r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.login1", 0, NULL, NULL); |
| if (r < 0) |
| return log_error_errno(r, "Failed to request name: %m"); |
| |
| r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL); |
| if (r < 0) |
| return log_error_errno(r, "Failed to attach bus to event loop: %m"); |
| |
| return 0; |
| } |
| |
| static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) { |
| Manager *m = data; |
| Session *active; |
| |
| /* |
| * We got a VT-switch signal and we have to acknowledge it immediately. |
| * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately, |
| * old user-space might run multiple sessions on a single VT, *sigh*. |
| * Therefore, we have to iterate all sessions and find one with a vtfd |
| * on the requested VT. |
| * As only VTs with active controllers have VT_PROCESS set, our current |
| * notion of the active VT might be wrong (for instance if the switch |
| * happens while we setup VT_PROCESS). Therefore, read the current VT |
| * first and then use s->active->vtnr as reference. Note that this is |
| * not racy, as no further VT-switch can happen as long as we're in |
| * synchronous VT_PROCESS mode. |
| */ |
| |
| assert(m->seat0); |
| seat_read_active_vt(m->seat0); |
| |
| active = m->seat0->active; |
| if (!active || active->vtnr < 1) { |
| _cleanup_close_ int fd = -EBADF; |
| int r; |
| |
| /* We are requested to acknowledge the VT-switch signal by the kernel but |
| * there's no registered sessions for the current VT. Normally this |
| * shouldn't happen but something wrong might have happened when we tried |
| * to release the VT. Better be safe than sorry, and try to release the VT |
| * one more time otherwise the user will be locked with the current VT. */ |
| |
| log_warning("Received VT_PROCESS signal without a registered session, restoring VT."); |
| |
| /* At this point we only have the kernel mapping for referring to the |
| * current VT. */ |
| fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK); |
| if (fd < 0) { |
| log_warning_errno(fd, "Failed to open, ignoring: %m"); |
| return 0; |
| } |
| |
| r = vt_release(fd, true); |
| if (r < 0) |
| log_warning_errno(r, "Failed to release VT, ignoring: %m"); |
| |
| return 0; |
| } |
| |
| if (active->vtfd >= 0) |
| session_leave_vt(active); |
| else |
| LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) |
| if (iter->vtnr == active->vtnr && iter->vtfd >= 0) { |
| session_leave_vt(iter); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int manager_connect_console(Manager *m) { |
| int r; |
| |
| assert(m); |
| assert(m->console_active_fd < 0); |
| |
| /* On certain systems (such as S390, Xen, and containers) /dev/tty0 does not exist (as there is no VC), so |
| * don't fail if we can't open it. */ |
| |
| if (access("/dev/tty0", F_OK) < 0) |
| return 0; |
| |
| m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC); |
| if (m->console_active_fd < 0) { |
| |
| /* On some systems /dev/tty0 may exist even though /sys/class/tty/tty0 does not. These are broken, but |
| * common. Let's complain but continue anyway. */ |
| if (errno == ENOENT) { |
| log_warning_errno(errno, "System has /dev/tty0 but not /sys/class/tty/tty0/active which is broken, ignoring: %m"); |
| return 0; |
| } |
| |
| return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m"); |
| } |
| |
| r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to watch foreground console: %m"); |
| |
| /* |
| * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used |
| * as VT-acquire signal. We ignore any acquire-events (yes, we still |
| * have to provide a valid signal-number for it!) and acknowledge all |
| * release events immediately. |
| */ |
| |
| if (SIGRTMIN + 1 > SIGRTMAX) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "Not enough real-time signals available: %i-%i", |
| SIGRTMIN, SIGRTMAX); |
| |
| assert_se(ignore_signals(SIGRTMIN + 1) >= 0); |
| assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0); |
| |
| r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to subscribe to signal: %m"); |
| |
| return 0; |
| } |
| |
| static int manager_connect_udev(Manager *m) { |
| int r; |
| |
| assert(m); |
| assert(!m->device_seat_monitor); |
| assert(!m->device_monitor); |
| assert(!m->device_vcsa_monitor); |
| assert(!m->device_button_monitor); |
| |
| r = sd_device_monitor_new(&m->device_seat_monitor); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_filter_add_match_tag(m->device_seat_monitor, "master-of-seat"); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_attach_event(m->device_seat_monitor, m->event); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_start(m->device_seat_monitor, manager_dispatch_seat_udev, m); |
| if (r < 0) |
| return r; |
| |
| (void) sd_device_monitor_set_description(m->device_seat_monitor, "seat"); |
| |
| r = sd_device_monitor_new(&m->device_monitor); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "input", NULL); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "graphics", NULL); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_monitor, "drm", NULL); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_attach_event(m->device_monitor, m->event); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_start(m->device_monitor, manager_dispatch_device_udev, m); |
| if (r < 0) |
| return r; |
| |
| (void) sd_device_monitor_set_description(m->device_monitor, "input,graphics,drm"); |
| |
| /* Don't watch keys if nobody cares */ |
| if (!manager_all_buttons_ignored(m)) { |
| r = sd_device_monitor_new(&m->device_button_monitor); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_filter_add_match_tag(m->device_button_monitor, "power-switch"); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_button_monitor, "input", NULL); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_attach_event(m->device_button_monitor, m->event); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_start(m->device_button_monitor, manager_dispatch_button_udev, m); |
| if (r < 0) |
| return r; |
| |
| (void) sd_device_monitor_set_description(m->device_button_monitor, "button"); |
| } |
| |
| /* Don't bother watching VCSA devices, if nobody cares */ |
| if (m->n_autovts > 0 && m->console_active_fd >= 0) { |
| |
| r = sd_device_monitor_new(&m->device_vcsa_monitor); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_filter_add_match_subsystem_devtype(m->device_vcsa_monitor, "vc", NULL); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_attach_event(m->device_vcsa_monitor, m->event); |
| if (r < 0) |
| return r; |
| |
| r = sd_device_monitor_start(m->device_vcsa_monitor, manager_dispatch_vcsa_udev, m); |
| if (r < 0) |
| return r; |
| |
| (void) sd_device_monitor_set_description(m->device_vcsa_monitor, "vcsa"); |
| } |
| |
| return 0; |
| } |
| |
| static void manager_gc(Manager *m, bool drop_not_started) { |
| Seat *seat; |
| Session *session; |
| User *user; |
| |
| assert(m); |
| |
| while ((seat = m->seat_gc_queue)) { |
| LIST_REMOVE(gc_queue, m->seat_gc_queue, seat); |
| seat->in_gc_queue = false; |
| |
| if (seat_may_gc(seat, drop_not_started)) { |
| seat_stop(seat, /* force = */ false); |
| seat_free(seat); |
| } |
| } |
| |
| while ((session = m->session_gc_queue)) { |
| LIST_REMOVE(gc_queue, m->session_gc_queue, session); |
| session->in_gc_queue = false; |
| |
| /* First, if we are not closing yet, initiate stopping. */ |
| if (session_may_gc(session, drop_not_started) && |
| session_get_state(session) != SESSION_CLOSING) |
| (void) session_stop(session, /* force = */ false); |
| |
| /* Normally, this should make the session referenced again, if it doesn't then let's get rid |
| * of it immediately. */ |
| if (session_may_gc(session, drop_not_started)) { |
| (void) session_finalize(session); |
| session_free(session); |
| } |
| } |
| |
| while ((user = m->user_gc_queue)) { |
| LIST_REMOVE(gc_queue, m->user_gc_queue, user); |
| user->in_gc_queue = false; |
| |
| /* First step: queue stop jobs */ |
| if (user_may_gc(user, drop_not_started)) |
| (void) user_stop(user, false); |
| |
| /* Second step: finalize user */ |
| if (user_may_gc(user, drop_not_started)) { |
| (void) user_finalize(user); |
| user_free(user); |
| } |
| } |
| } |
| |
| static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) { |
| Manager *m = ASSERT_PTR(userdata); |
| struct dual_timestamp since; |
| usec_t n, elapse; |
| int r; |
| |
| if (m->idle_action == HANDLE_IGNORE || |
| m->idle_action_usec <= 0) |
| return 0; |
| |
| n = now(CLOCK_MONOTONIC); |
| |
| r = manager_get_idle_hint(m, &since); |
| if (r <= 0) { |
| /* Not idle. Let's check if after a timeout it might be idle then. */ |
| elapse = n + m->idle_action_usec; |
| m->was_idle = false; |
| } else { |
| |
| /* Idle! Let's see if it's time to do something, or if |
| * we shall sleep for longer. */ |
| |
| if (n >= since.monotonic + m->idle_action_usec && |
| (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) { |
| bool is_edge = false; |
| |
| /* We weren't idle previously or some activity happened while we were sleeping, and now we are |
| * idle. Let's remember that for the next time and make this an edge transition. */ |
| if (!m->was_idle || since.monotonic >= m->idle_action_not_before_usec) { |
| is_edge = true; |
| m->was_idle = true; |
| } |
| |
| if (m->idle_action == HANDLE_LOCK && !is_edge) |
| /* We are idle and we were before so we are actually not taking any action. */ |
| log_debug("System idle."); |
| else |
| log_info("System idle. Will %s now.", handle_action_verb_to_string(m->idle_action)); |
| |
| manager_handle_action(m, 0, m->idle_action, false, is_edge); |
| m->idle_action_not_before_usec = n; |
| } |
| |
| elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec; |
| } |
| |
| if (!m->idle_action_event_source) { |
| |
| r = sd_event_add_time( |
| m->event, |
| &m->idle_action_event_source, |
| CLOCK_MONOTONIC, |
| elapse, USEC_PER_SEC*30, |
| manager_dispatch_idle_action, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to add idle event source: %m"); |
| |
| r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10); |
| if (r < 0) |
| return log_error_errno(r, "Failed to set idle event source priority: %m"); |
| } else { |
| r = sd_event_source_set_time(m->idle_action_event_source, elapse); |
| if (r < 0) |
| return log_error_errno(r, "Failed to set idle event timer: %m"); |
| |
| r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT); |
| if (r < 0) |
| return log_error_errno(r, "Failed to enable idle event timer: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
| Manager *m = userdata; |
| int r; |
| |
| (void) sd_notifyf(/* unset= */ false, |
| "RELOADING=1\n" |
| "STATUS=Reloading configuration...\n" |
| "MONOTONIC_USEC=" USEC_FMT, now(CLOCK_MONOTONIC)); |
| |
| manager_reset_config(m); |
| r = manager_parse_config_file(m); |
| if (r < 0) |
| log_warning_errno(r, "Failed to parse config file, using defaults: %m"); |
| else |
| log_info("Config file reloaded."); |
| |
| (void) sd_notify(/* unset= */ false, NOTIFY_READY); |
| return 0; |
| } |
| |
| static int manager_startup(Manager *m) { |
| int r; |
| Seat *seat; |
| Session *session; |
| User *user; |
| Button *button; |
| Inhibitor *inhibitor; |
| |
| assert(m); |
| |
| r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register SIGHUP handler: %m"); |
| |
| /* Connect to utmp */ |
| manager_connect_utmp(m); |
| |
| /* Connect to console */ |
| r = manager_connect_console(m); |
| if (r < 0) |
| return r; |
| |
| /* Connect to udev */ |
| r = manager_connect_udev(m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to create udev watchers: %m"); |
| |
| /* Connect to the bus */ |
| r = manager_connect_bus(m); |
| if (r < 0) |
| return r; |
| |
| /* Instantiate magic seat 0 */ |
| r = manager_add_seat(m, "seat0", &m->seat0); |
| if (r < 0) |
| return log_error_errno(r, "Failed to add seat0: %m"); |
| |
| r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec); |
| if (r < 0) |
| log_warning_errno(r, "Failed to set up lid switch ignore event source: %m"); |
| |
| /* Deserialize state */ |
| r = manager_enumerate_devices(m); |
| if (r < 0) |
| log_warning_errno(r, "Device enumeration failed: %m"); |
| |
| r = manager_enumerate_seats(m); |
| if (r < 0) |
| log_warning_errno(r, "Seat enumeration failed: %m"); |
| |
| r = manager_enumerate_users(m); |
| if (r < 0) |
| log_warning_errno(r, "User enumeration failed: %m"); |
| |
| r = manager_enumerate_sessions(m); |
| if (r < 0) |
| log_warning_errno(r, "Session enumeration failed: %m"); |
| |
| r = manager_enumerate_inhibitors(m); |
| if (r < 0) |
| log_warning_errno(r, "Inhibitor enumeration failed: %m"); |
| |
| r = manager_enumerate_buttons(m); |
| if (r < 0) |
| log_warning_errno(r, "Button enumeration failed: %m"); |
| |
| manager_load_scheduled_shutdown(m); |
| |
| /* Remove stale objects before we start them */ |
| manager_gc(m, false); |
| |
| /* Reserve the special reserved VT */ |
| manager_reserve_vt(m); |
| |
| /* Read in utmp if it exists */ |
| manager_read_utmp(m); |
| |
| /* And start everything */ |
| HASHMAP_FOREACH(seat, m->seats) |
| (void) seat_start(seat); |
| |
| HASHMAP_FOREACH(user, m->users) |
| (void) user_start(user); |
| |
| HASHMAP_FOREACH(session, m->sessions) |
| (void) session_start(session, NULL, NULL); |
| |
| HASHMAP_FOREACH(inhibitor, m->inhibitors) { |
| (void) inhibitor_start(inhibitor); |
| |
| /* Let's see if the inhibitor is dead now, then remove it */ |
| if (inhibitor_is_orphan(inhibitor)) { |
| inhibitor_stop(inhibitor); |
| inhibitor_free(inhibitor); |
| } |
| } |
| |
| HASHMAP_FOREACH(button, m->buttons) |
| button_check_switches(button); |
| |
| manager_dispatch_idle_action(NULL, 0, m); |
| |
| return 0; |
| } |
| |
| static int manager_run(Manager *m) { |
| int r; |
| |
| assert(m); |
| |
| for (;;) { |
| r = sd_event_get_state(m->event); |
| if (r < 0) |
| return r; |
| if (r == SD_EVENT_FINISHED) |
| return 0; |
| |
| manager_gc(m, true); |
| |
| r = manager_dispatch_delayed(m, false); |
| if (r < 0) |
| return r; |
| if (r > 0) |
| continue; |
| |
| r = sd_event_run(m->event, UINT64_MAX); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| static int run(int argc, char *argv[]) { |
| _cleanup_(manager_unrefp) Manager *m = NULL; |
| _unused_ _cleanup_(notify_on_cleanup) const char *notify_message = NULL; |
| int r; |
| |
| log_set_facility(LOG_AUTH); |
| log_setup(); |
| |
| r = service_parse_argv("systemd-logind.service", |
| "Manager for user logins and devices and privileged operations.", |
| BUS_IMPLEMENTATIONS(&manager_object, |
| &log_control_object), |
| argc, argv); |
| if (r <= 0) |
| return r; |
| |
| umask(0022); |
| |
| r = mac_selinux_init(); |
| if (r < 0) |
| return r; |
| |
| /* Always create the directories people can create inotify watches in. Note that some applications |
| * might check for the existence of /run/systemd/seats/ to determine whether logind is available, so |
| * please always make sure these directories are created early on and unconditionally. */ |
| (void) mkdir_label("/run/systemd/seats", 0755); |
| (void) mkdir_label("/run/systemd/users", 0755); |
| (void) mkdir_label("/run/systemd/sessions", 0755); |
| |
| assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGHUP, SIGTERM, SIGINT, SIGCHLD, -1) >= 0); |
| |
| r = manager_new(&m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to allocate manager object: %m"); |
| |
| (void) manager_parse_config_file(m); |
| |
| r = manager_startup(m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to fully start up daemon: %m"); |
| |
| notify_message = notify_start(NOTIFY_READY, NOTIFY_STOPPING); |
| return manager_run(m); |
| } |
| |
| DEFINE_MAIN_FUNCTION(run); |
