1203 lines
38 KiB
C
1203 lines
38 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "sd-daemon.h"
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#include "sd-device.h"
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#include "alloc-util.h"
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#include "bus-error.h"
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#include "bus-locator.h"
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#include "bus-log-control-api.h"
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#include "bus-polkit.h"
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#include "cgroup-util.h"
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#include "daemon-util.h"
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#include "def.h"
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#include "device-util.h"
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#include "dirent-util.h"
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#include "fd-util.h"
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#include "format-util.h"
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#include "fs-util.h"
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#include "logind-dbus.h"
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#include "logind-seat-dbus.h"
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#include "logind-session-dbus.h"
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#include "logind-user-dbus.h"
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#include "logind.h"
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#include "main-func.h"
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#include "parse-util.h"
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#include "process-util.h"
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#include "selinux-util.h"
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#include "service-util.h"
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#include "signal-util.h"
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#include "strv.h"
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#include "terminal-util.h"
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#include "udev-util.h"
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#include "user-util.h"
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static Manager* manager_unref(Manager *m);
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DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref);
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static int manager_new(Manager **ret) {
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_cleanup_(manager_unrefp) Manager *m = NULL;
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int r;
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assert(ret);
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m = new(Manager, 1);
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if (!m)
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return -ENOMEM;
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*m = (Manager) {
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.console_active_fd = -1,
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.reserve_vt_fd = -1,
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.idle_action_not_before_usec = now(CLOCK_MONOTONIC),
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};
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m->devices = hashmap_new(&string_hash_ops);
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m->seats = hashmap_new(&string_hash_ops);
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m->sessions = hashmap_new(&string_hash_ops);
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m->sessions_by_leader = hashmap_new(NULL);
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m->users = hashmap_new(NULL);
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m->inhibitors = hashmap_new(&string_hash_ops);
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m->buttons = hashmap_new(&string_hash_ops);
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m->user_units = hashmap_new(&string_hash_ops);
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m->session_units = hashmap_new(&string_hash_ops);
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if (!m->devices || !m->seats || !m->sessions || !m->sessions_by_leader || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
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return -ENOMEM;
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r = sd_event_default(&m->event);
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if (r < 0)
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return r;
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r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
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if (r < 0)
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return r;
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r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
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if (r < 0)
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return r;
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(void) sd_event_set_watchdog(m->event, true);
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manager_reset_config(m);
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*ret = TAKE_PTR(m);
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return 0;
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}
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static Manager* manager_unref(Manager *m) {
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Session *session;
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User *u;
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Device *d;
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Seat *s;
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Inhibitor *i;
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Button *b;
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if (!m)
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return NULL;
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while ((session = hashmap_first(m->sessions)))
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session_free(session);
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while ((u = hashmap_first(m->users)))
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user_free(u);
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while ((d = hashmap_first(m->devices)))
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device_free(d);
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while ((s = hashmap_first(m->seats)))
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seat_free(s);
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while ((i = hashmap_first(m->inhibitors)))
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inhibitor_free(i);
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while ((b = hashmap_first(m->buttons)))
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button_free(b);
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hashmap_free(m->devices);
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hashmap_free(m->seats);
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hashmap_free(m->sessions);
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hashmap_free(m->sessions_by_leader);
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hashmap_free(m->users);
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hashmap_free(m->inhibitors);
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hashmap_free(m->buttons);
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hashmap_free(m->brightness_writers);
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hashmap_free(m->user_units);
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hashmap_free(m->session_units);
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sd_event_source_unref(m->idle_action_event_source);
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sd_event_source_unref(m->inhibit_timeout_source);
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sd_event_source_unref(m->scheduled_shutdown_timeout_source);
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sd_event_source_unref(m->nologin_timeout_source);
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sd_event_source_unref(m->wall_message_timeout_source);
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sd_event_source_unref(m->console_active_event_source);
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sd_event_source_unref(m->lid_switch_ignore_event_source);
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#if ENABLE_UTMP
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sd_event_source_unref(m->utmp_event_source);
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#endif
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safe_close(m->console_active_fd);
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sd_device_monitor_unref(m->device_seat_monitor);
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sd_device_monitor_unref(m->device_monitor);
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sd_device_monitor_unref(m->device_vcsa_monitor);
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sd_device_monitor_unref(m->device_button_monitor);
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if (m->unlink_nologin)
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(void) unlink_or_warn("/run/nologin");
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bus_verify_polkit_async_registry_free(m->polkit_registry);
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sd_bus_flush_close_unref(m->bus);
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sd_event_unref(m->event);
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safe_close(m->reserve_vt_fd);
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strv_free(m->kill_only_users);
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strv_free(m->kill_exclude_users);
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free(m->scheduled_shutdown_type);
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free(m->scheduled_shutdown_tty);
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free(m->wall_message);
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free(m->action_job);
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strv_free(m->efi_boot_loader_entries);
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free(m->efi_loader_entry_one_shot);
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return mfree(m);
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}
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static int manager_enumerate_devices(Manager *m) {
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_cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
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sd_device *d;
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int r;
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assert(m);
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/* Loads devices from udev and creates seats for them as
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* necessary */
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r = sd_device_enumerator_new(&e);
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if (r < 0)
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return r;
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r = sd_device_enumerator_add_match_tag(e, "master-of-seat");
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if (r < 0)
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return r;
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FOREACH_DEVICE(e, d) {
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int k;
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k = manager_process_seat_device(m, d);
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if (k < 0)
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r = k;
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}
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return r;
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}
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static int manager_enumerate_buttons(Manager *m) {
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_cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
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sd_device *d;
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int r;
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assert(m);
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/* Loads buttons from udev */
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if (manager_all_buttons_ignored(m))
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return 0;
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r = sd_device_enumerator_new(&e);
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if (r < 0)
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return r;
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r = sd_device_enumerator_add_match_subsystem(e, "input", true);
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if (r < 0)
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return r;
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r = sd_device_enumerator_add_match_tag(e, "power-switch");
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if (r < 0)
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return r;
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FOREACH_DEVICE(e, d) {
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int k;
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k = manager_process_button_device(m, d);
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if (k < 0)
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r = k;
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}
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return r;
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}
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static int manager_enumerate_seats(Manager *m) {
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_cleanup_closedir_ DIR *d = NULL;
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struct dirent *de;
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int r = 0;
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assert(m);
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/* This loads data about seats stored on disk, but does not
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* actually create any seats. Removes data of seats that no
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* longer exist. */
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d = opendir("/run/systemd/seats");
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if (!d) {
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if (errno == ENOENT)
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return 0;
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return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
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}
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FOREACH_DIRENT(de, d, return -errno) {
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Seat *s;
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int k;
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if (!dirent_is_file(de))
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continue;
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s = hashmap_get(m->seats, de->d_name);
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if (!s) {
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if (unlinkat(dirfd(d), de->d_name, 0) < 0)
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log_warning("Failed to remove /run/systemd/seats/%s: %m",
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de->d_name);
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continue;
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}
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k = seat_load(s);
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if (k < 0)
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r = k;
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}
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return r;
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}
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static int manager_enumerate_linger_users(Manager *m) {
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_cleanup_closedir_ DIR *d = NULL;
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struct dirent *de;
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int r = 0;
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assert(m);
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d = opendir("/var/lib/systemd/linger");
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if (!d) {
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if (errno == ENOENT)
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return 0;
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return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
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}
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FOREACH_DIRENT(de, d, return -errno) {
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int k;
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dirent_ensure_type(d, de);
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if (!dirent_is_file(de))
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continue;
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k = manager_add_user_by_name(m, de->d_name, NULL);
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if (k < 0)
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r = log_warning_errno(k, "Couldn't add lingering user %s, ignoring: %m", de->d_name);
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}
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return r;
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}
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static int manager_enumerate_users(Manager *m) {
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_cleanup_closedir_ DIR *d = NULL;
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struct dirent *de;
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int r, k;
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assert(m);
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/* Add lingering users */
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r = manager_enumerate_linger_users(m);
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/* Read in user data stored on disk */
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d = opendir("/run/systemd/users");
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if (!d) {
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if (errno == ENOENT)
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return 0;
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return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
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}
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FOREACH_DIRENT(de, d, return -errno) {
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User *u;
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uid_t uid;
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if (!dirent_is_file(de))
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continue;
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k = parse_uid(de->d_name, &uid);
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if (k < 0) {
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r = log_warning_errno(k, "Failed to parse filename /run/systemd/users/%s as UID.", de->d_name);
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continue;
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}
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k = manager_add_user_by_uid(m, uid, &u);
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if (k < 0) {
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r = log_warning_errno(k, "Failed to add user by file name %s, ignoring: %m", de->d_name);
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continue;
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}
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user_add_to_gc_queue(u);
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k = user_load(u);
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if (k < 0)
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r = k;
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}
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return r;
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}
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static int parse_fdname(const char *fdname, char **session_id, dev_t *dev) {
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_cleanup_strv_free_ char **parts = NULL;
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_cleanup_free_ char *id = NULL;
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unsigned major, minor;
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int r;
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parts = strv_split(fdname, "-");
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if (!parts)
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return -ENOMEM;
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if (strv_length(parts) != 5)
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return -EINVAL;
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if (!streq(parts[0], "session"))
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return -EINVAL;
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id = strdup(parts[1]);
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if (!id)
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return -ENOMEM;
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if (!streq(parts[2], "device"))
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return -EINVAL;
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r = safe_atou(parts[3], &major);
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if (r < 0)
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return r;
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r = safe_atou(parts[4], &minor);
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if (r < 0)
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return r;
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*dev = makedev(major, minor);
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*session_id = TAKE_PTR(id);
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return 0;
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}
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static int deliver_fd(Manager *m, const char *fdname, int fd) {
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_cleanup_free_ char *id = NULL;
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SessionDevice *sd;
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struct stat st;
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Session *s;
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dev_t dev;
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int r;
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assert(m);
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assert(fd >= 0);
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r = parse_fdname(fdname, &id, &dev);
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if (r < 0)
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return log_debug_errno(r, "Failed to parse fd name %s: %m", fdname);
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s = hashmap_get(m->sessions, id);
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if (!s)
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/* If the session doesn't exist anymore, the associated session device attached to this fd
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* doesn't either. Let's simply close this fd. */
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return log_debug_errno(SYNTHETIC_ERRNO(ENXIO), "Failed to attach fd for unknown session: %s", id);
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if (fstat(fd, &st) < 0)
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/* The device is allowed to go away at a random point, in which case fstat() failing is
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* expected. */
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return log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id);
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if (!S_ISCHR(st.st_mode) || st.st_rdev != dev)
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return log_debug_errno(SYNTHETIC_ERRNO(ENODEV), "Device fd doesn't point to the expected character device node");
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sd = hashmap_get(s->devices, &dev);
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if (!sd)
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/* Weird, we got an fd for a session device which wasn't recorded in the session state
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* file... */
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return log_warning_errno(SYNTHETIC_ERRNO(ENODEV), "Got fd for missing session device [%u:%u] in session %s",
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major(dev), minor(dev), s->id);
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log_debug("Attaching fd to session device [%u:%u] for session %s",
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major(dev), minor(dev), s->id);
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session_device_attach_fd(sd, fd, s->was_active);
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return 0;
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}
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static int manager_attach_fds(Manager *m) {
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_cleanup_strv_free_ char **fdnames = NULL;
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int n;
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/* Upon restart, PID1 will send us back all fds of session devices that we previously opened. Each
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* file descriptor is associated with a given session. The session ids are passed through FDNAMES. */
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n = sd_listen_fds_with_names(true, &fdnames);
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if (n < 0)
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return log_warning_errno(n, "Failed to acquire passed fd list: %m");
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if (n == 0)
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return 0;
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for (int i = 0; i < n; i++) {
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int fd = SD_LISTEN_FDS_START + i;
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if (deliver_fd(m, fdnames[i], fd) >= 0)
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continue;
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/* Hmm, we couldn't deliver the fd to any session device object? If so, let's close the fd */
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safe_close(fd);
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/* Remove from fdstore as well */
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(void) sd_notifyf(false,
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"FDSTOREREMOVE=1\n"
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"FDNAME=%s", fdnames[i]);
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}
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return 0;
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}
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static int manager_enumerate_sessions(Manager *m) {
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_cleanup_closedir_ DIR *d = NULL;
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struct dirent *de;
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int r = 0, k;
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assert(m);
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/* Read in session data stored on disk */
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d = opendir("/run/systemd/sessions");
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if (!d) {
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if (errno == ENOENT)
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return 0;
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return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
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}
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FOREACH_DIRENT(de, d, return -errno) {
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struct Session *s;
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if (!dirent_is_file(de))
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continue;
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k = manager_add_session(m, de->d_name, &s);
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if (k < 0) {
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r = log_warning_errno(k, "Failed to add session by file name %s, ignoring: %m", de->d_name);
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continue;
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}
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session_add_to_gc_queue(s);
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k = session_load(s);
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if (k < 0)
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r = k;
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}
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/* We might be restarted and PID1 could have sent us back the session device fds we previously
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* saved. */
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(void) manager_attach_fds(m);
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return r;
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}
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static int manager_enumerate_inhibitors(Manager *m) {
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_cleanup_closedir_ DIR *d = NULL;
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struct dirent *de;
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int r = 0;
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assert(m);
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d = opendir("/run/systemd/inhibit");
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if (!d) {
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if (errno == ENOENT)
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return 0;
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return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
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}
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FOREACH_DIRENT(de, d, return -errno) {
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int k;
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Inhibitor *i;
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if (!dirent_is_file(de))
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continue;
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k = manager_add_inhibitor(m, de->d_name, &i);
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if (k < 0) {
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r = log_warning_errno(k, "Couldn't add inhibitor %s, ignoring: %m", de->d_name);
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continue;
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}
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k = inhibitor_load(i);
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if (k < 0)
|
|
r = k;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int manager_dispatch_seat_udev(sd_device_monitor *monitor, sd_device *device, void *userdata) {
|
|
Manager *m = userdata;
|
|
|
|
assert(m);
|
|
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 = userdata;
|
|
|
|
assert(m);
|
|
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 = userdata;
|
|
const char *name;
|
|
|
|
assert(m);
|
|
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, DEVICE_ACTION_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 = userdata;
|
|
|
|
assert(m);
|
|
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 = userdata;
|
|
|
|
assert(m);
|
|
assert(m->seat0);
|
|
assert(m->console_active_fd == fd);
|
|
|
|
seat_read_active_vt(m->seat0);
|
|
return 0;
|
|
}
|
|
|
|
static int manager_reserve_vt(Manager *m) {
|
|
_cleanup_free_ char *p = NULL;
|
|
|
|
assert(m);
|
|
|
|
if (m->reserve_vt <= 0)
|
|
return 0;
|
|
|
|
if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
|
|
return log_oom();
|
|
|
|
m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
|
|
if (m->reserve_vt_fd < 0) {
|
|
|
|
/* Don't complain on VT-less systems */
|
|
if (errno != ENOENT)
|
|
log_warning_errno(errno, "Failed to pin reserved VT: %m");
|
|
return -errno;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_connect_bus(Manager *m) {
|
|
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, *iter;
|
|
|
|
/*
|
|
* We got a VT-switch signal and we have to acknowledge it immediately.
|
|
* Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
|
|
* old user-space might run multiple sessions on a single VT, *sigh*.
|
|
* Therefore, we have to iterate all sessions and find one with a vtfd
|
|
* on the requested VT.
|
|
* As only VTs with active controllers have VT_PROCESS set, our current
|
|
* notion of the active VT might be wrong (for instance if the switch
|
|
* happens while we setup VT_PROCESS). Therefore, read the current VT
|
|
* first and then use s->active->vtnr as reference. Note that this is
|
|
* not racy, as no further VT-switch can happen as long as we're in
|
|
* synchronous VT_PROCESS mode.
|
|
*/
|
|
|
|
assert(m->seat0);
|
|
seat_read_active_vt(m->seat0);
|
|
|
|
active = m->seat0->active;
|
|
if (!active || active->vtnr < 1) {
|
|
_cleanup_close_ int fd = -1;
|
|
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: %u-%u",
|
|
SIGRTMIN, SIGRTMAX);
|
|
|
|
assert_se(ignore_signals(SIGRTMIN + 1, -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_event_source_set_description(sd_device_monitor_get_event_source(m->device_seat_monitor), "logind-seat-monitor");
|
|
|
|
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_event_source_set_description(sd_device_monitor_get_event_source(m->device_monitor), "logind-device-monitor");
|
|
|
|
/* 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_event_source_set_description(sd_device_monitor_get_event_source(m->device_button_monitor), "logind-button-monitor");
|
|
}
|
|
|
|
/* 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_event_source_set_description(sd_device_monitor_get_event_source(m->device_vcsa_monitor), "logind-vcsa-monitor");
|
|
}
|
|
|
|
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 = userdata;
|
|
struct dual_timestamp since;
|
|
usec_t n, elapse;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
if (m->idle_action == HANDLE_IGNORE ||
|
|
m->idle_action_usec <= 0)
|
|
return 0;
|
|
|
|
n = now(CLOCK_MONOTONIC);
|
|
|
|
r = manager_get_idle_hint(m, &since);
|
|
if (r <= 0)
|
|
/* Not idle. Let's check if after a timeout it might be idle then. */
|
|
elapse = n + m->idle_action_usec;
|
|
else {
|
|
/* Idle! Let's see if it's time to do something, or if
|
|
* we shall sleep for longer. */
|
|
|
|
if (n >= since.monotonic + m->idle_action_usec &&
|
|
(m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
|
|
log_info("System idle. Doing %s operation.", handle_action_to_string(m->idle_action));
|
|
|
|
manager_handle_action(m, 0, m->idle_action, false, false);
|
|
m->idle_action_not_before_usec = n;
|
|
}
|
|
|
|
elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
|
|
}
|
|
|
|
if (!m->idle_action_event_source) {
|
|
|
|
r = sd_event_add_time(
|
|
m->event,
|
|
&m->idle_action_event_source,
|
|
CLOCK_MONOTONIC,
|
|
elapse, USEC_PER_SEC*30,
|
|
manager_dispatch_idle_action, m);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to add idle event source: %m");
|
|
|
|
r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to set idle event source priority: %m");
|
|
} else {
|
|
r = sd_event_source_set_time(m->idle_action_event_source, elapse);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to set idle event timer: %m");
|
|
|
|
r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to enable idle event timer: %m");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
|
|
Manager *m = userdata;
|
|
int r;
|
|
|
|
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.");
|
|
|
|
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");
|
|
|
|
/* 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_t) -1);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
static int run(int argc, char *argv[]) {
|
|
_cleanup_(manager_unrefp) Manager *m = NULL;
|
|
_cleanup_(notify_on_cleanup) const char *notify_message = NULL;
|
|
int r;
|
|
|
|
log_set_facility(LOG_AUTH);
|
|
log_setup_service();
|
|
|
|
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);
|