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logind.c
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logind.c
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/* 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 "daemon-util.h"
#include "def.h"
#include "device-util.h"
#include "dirent-util.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 = -1,
.reserve_vt_fd = -1,
.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_type);
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;
if (!dirent_is_file(de))
continue;
k = manager_add_user_by_name(m, de->d_name, 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 r, 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 */
safe_close(fd);
/* Remove from fdstore as well */
r = sd_notifyf(false,
"FDSTOREREMOVE=1\n"
"FDNAME=%s", fdnames[i]);
if (r < 0)
log_warning_errno(r, "Failed to remove file descriptor from the store, ignoring: %m");
}
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 = 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, 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 = 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) >= 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 {