#include <errno.h>

#include <libudev.h>

#include <fcntl.h>

#include <string.h>

#include <unistd.h>

#include "sd-daemon.h"

#include "strv.h"

#include "conf-parser.h"

#include "bus-util.h"

#include "bus-error.h"

#include "logind.h"

#include "udev-util.h"

#include "formats-util.h"

static void manager_free(Manager *m);

static Manager *manager_new(void) {

Manager *m;

int r;

m = new0(Manager, 1);

if (!m)

return NULL;

m->console_active_fd = -1;

m->reserve_vt_fd = -1;

m->n_autovts = 6;

m->reserve_vt = 6;

m->remove_ipc = true;

m->inhibit_delay_max = 5 * USEC_PER_SEC;

m->handle_power_key = HANDLE_POWEROFF;

m->handle_suspend_key = HANDLE_SUSPEND;

m->handle_hibernate_key = HANDLE_HIBERNATE;

m->handle_lid_switch = HANDLE_SUSPEND;

m->handle_lid_switch_docked = HANDLE_IGNORE;

m->lid_switch_ignore_inhibited = true;

m->holdoff_timeout_usec = 30 * USEC_PER_SEC;

m->idle_action_usec = 30 * USEC_PER_MINUTE;

m->idle_action = HANDLE_IGNORE;

m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);

m->runtime_dir_size = PAGE_ALIGN((size_t) (physical_memory() / 10)); /* 10% */

m->devices = hashmap_new(&string_hash_ops);

m->seats = hashmap_new(&string_hash_ops);

m->sessions = hashmap_new(&string_hash_ops);

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);

m->busnames = set_new(&string_hash_ops);

if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->busnames ||

!m->user_units || !m->session_units)

goto fail;

m->kill_exclude_users = strv_new("root", NULL);

if (!m->kill_exclude_users)

goto fail;

m->udev = udev_new();

if (!m->udev)

goto fail;

r = sd_event_default(&m->event);

if (r < 0)

goto fail;

sd_event_set_watchdog(m->event, true);

return m;

fail:

manager_free(m);

return NULL;

}

static void manager_free(Manager *m) {

Session *session;

User *u;

Device *d;

Seat *s;

Inhibitor *i;

Button *b;

assert(m);

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->users);

hashmap_free(m->inhibitors);

hashmap_free(m->buttons);

hashmap_free(m->user_units);

hashmap_free(m->session_units);

set_free_free(m->busnames);

sd_event_source_unref(m->idle_action_event_source);

sd_event_source_unref(m->inhibit_timeout_source);

sd_event_source_unref(m->console_active_event_source);

sd_event_source_unref(m->udev_seat_event_source);

sd_event_source_unref(m->udev_device_event_source);

sd_event_source_unref(m->udev_vcsa_event_source);

sd_event_source_unref(m->udev_button_event_source);

sd_event_source_unref(m->lid_switch_ignore_event_source);

safe_close(m->console_active_fd);

if (m->udev_seat_monitor)

udev_monitor_unref(m->udev_seat_monitor);

if (m->udev_device_monitor)

udev_monitor_unref(m->udev_device_monitor);

if (m->udev_vcsa_monitor)

udev_monitor_unref(m->udev_vcsa_monitor);

if (m->udev_button_monitor)

udev_monitor_unref(m->udev_button_monitor);

if (m->udev)

udev_unref(m->udev);

bus_verify_polkit_async_registry_free(m->polkit_registry);

sd_bus_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->action_job);

free(m);

}

static int manager_enumerate_devices(Manager *m) {

struct udev_list_entry *item = NULL, *first = NULL;

_cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;

int r;

assert(m);

/* Loads devices from udev and creates seats for them as

e = udev_enumerate_new(m->udev);

if (!e)

return -ENOMEM;

r = udev_enumerate_add_match_tag(e, "master-of-seat");

if (r < 0)

return r;

r = udev_enumerate_add_match_is_initialized(e);

if (r < 0)

return r;

r = udev_enumerate_scan_devices(e);

if (r < 0)

return r;

first = udev_enumerate_get_list_entry(e);

udev_list_entry_foreach(item, first) {

_cleanup_udev_device_unref_ struct udev_device *d = NULL;

int k;

d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));

if (!d)

return -ENOMEM;

k = manager_process_seat_device(m, d);

if (k < 0)

r = k;

}

return r;

}

static int manager_enumerate_buttons(Manager *m) {

_cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;

struct udev_list_entry *item = NULL, *first = NULL;

int r;

assert(m);

/* Loads buttons from udev */

if (m->handle_power_key == HANDLE_IGNORE &&

m->handle_suspend_key == HANDLE_IGNORE &&

m->handle_hibernate_key == HANDLE_IGNORE &&

m->handle_lid_switch == HANDLE_IGNORE &&

m->handle_lid_switch_docked == HANDLE_IGNORE)

return 0;

e = udev_enumerate_new(m->udev);

if (!e)

return -ENOMEM;

r = udev_enumerate_add_match_subsystem(e, "input");

if (r < 0)

return r;

r = udev_enumerate_add_match_tag(e, "power-switch");

if (r < 0)

return r;

r = udev_enumerate_add_match_is_initialized(e);

if (r < 0)

return r;

r = udev_enumerate_scan_devices(e);

if (r < 0)

return r;

first = udev_enumerate_get_list_entry(e);

udev_list_entry_foreach(item, first) {

_cleanup_udev_device_unref_ struct udev_device *d = NULL;

int k;

d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));

if (!d)

return -ENOMEM;

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;

struct dirent *de;

int r = 0;

assert(m);

/* This loads data about seats stored on disk, but does not

d = opendir("/run/systemd/seats");

if (!d) {

if (errno == ENOENT)

return 0;

log_error_errno(errno, "Failed to open /run/systemd/seats: %m");

return -errno;

}

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) {

unlinkat(dirfd(d), de->d_name, 0);

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;

struct dirent *de;

int r = 0;

assert(m);

d = opendir("/var/lib/systemd/linger");

if (!d) {

if (errno == ENOENT)

return 0;

log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");

return -errno;

}

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) {

log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);

r = k;

}

}

return r;

}

static int manager_enumerate_users(Manager *m) {

_cleanup_closedir_ DIR *d = NULL;

struct dirent *de;

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;

log_error_errno(errno, "Failed to open /run/systemd/users: %m");

return -errno;

}

FOREACH_DIRENT(de, d, return -errno) {

User *u;

if (!dirent_is_file(de))

continue;

k = manager_add_user_by_name(m, de->d_name, &u);

if (k < 0) {

log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);

r = k;

continue;

}

user_add_to_gc_queue(u);

k = user_load(u);

if (k < 0)

r = k;

}

return r;

}

static int manager_enumerate_sessions(Manager *m) {

_cleanup_closedir_ DIR *d = NULL;

struct dirent *de;

int r = 0;

assert(m);

/* Read in session data stored on disk */

d = opendir("/run/systemd/sessions");

if (!d) {

if (errno == ENOENT)

return 0;

log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");

return -errno;

}

FOREACH_DIRENT(de, d, return -errno) {

struct Session *s;

int k;

if (!dirent_is_file(de))

continue;

if (!session_id_valid(de->d_name)) {

log_warning("Invalid session file name '%s', ignoring.", de->d_name);

r = -EINVAL;

continue;

}

k = manager_add_session(m, de->d_name, &s);

if (k < 0) {

log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);

r = k;

continue;

}

session_add_to_gc_queue(s);

k = session_load(s);

if (k < 0)

r = k;

}

return r;

}

static int manager_enumerate_inhibitors(Manager *m) {

_cleanup_closedir_ DIR *d = NULL;

struct dirent *de;

int r = 0;

assert(m);

d = opendir("/run/systemd/inhibit");

if (!d) {

if (errno == ENOENT)

return 0;

log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");

return -errno;

}

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) {

log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);

r = k;

continue;

}

k = inhibitor_load(i);

if (k < 0)

r = k;

}

return r;

}

static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

_cleanup_udev_device_unref_ struct udev_device *d = NULL;

Manager *m = userdata;

assert(m);

d = udev_monitor_receive_device(m->udev_seat_monitor);

if (!d)

return -ENOMEM;

manager_process_seat_device(m, d);

return 0;

}

static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

_cleanup_udev_device_unref_ struct udev_device *d = NULL;

Manager *m = userdata;

assert(m);

d = udev_monitor_receive_device(m->udev_device_monitor);

if (!d)

return -ENOMEM;

manager_process_seat_device(m, d);

return 0;

}

static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

_cleanup_udev_device_unref_ struct udev_device *d = NULL;

Manager *m = userdata;

const char *name;

assert(m);

d = udev_monitor_receive_device(m->udev_vcsa_monitor);

if (!d)

return -ENOMEM;

name = udev_device_get_sysname(d);

/* Whenever a VCSA device is removed try to reallocate our

if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))

seat_preallocate_vts(m->seat0);

return 0;

}

static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

_cleanup_udev_device_unref_ struct udev_device *d = NULL;

Manager *m = userdata;

assert(m);

d = udev_monitor_receive_device(m->udev_button_monitor);

if (!d)

return -ENOMEM;

manager_process_button_device(m, d);

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) {

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

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 = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);

if (r < 0)

return log_error_errno(r, "Failed to add manager object vtable: %m");

r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);

if (r < 0)

return log_error_errno(r, "Failed to add seat object vtable: %m");

r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);

if (r < 0)

return log_error_errno(r, "Failed to add seat enumerator: %m");

r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);

if (r < 0)

return log_error_errno(r, "Failed to add session object vtable: %m");

r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);

if (r < 0)

return log_error_errno(r, "Failed to add session enumerator: %m");

r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);

if (r < 0)

return log_error_errno(r, "Failed to add user object vtable: %m");

r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);

if (r < 0)

return log_error_errno(r, "Failed to add user enumerator: %m");

r = sd_bus_add_match(m->bus,

NULL,

"type='signal',"

"sender='org.freedesktop.DBus',"

"interface='org.freedesktop.DBus',"

"member='NameOwnerChanged',"

"path='/org/freedesktop/DBus'",

match_name_owner_changed, m);

if (r < 0)

return log_error_errno(r, "Failed to add match for NameOwnerChanged: %m");

r = sd_bus_add_match(m->bus,

NULL,

"type='signal',"

"sender='org.freedesktop.systemd1',"

"interface='org.freedesktop.systemd1.Manager',"

"member='JobRemoved',"

"path='/org/freedesktop/systemd1'",

match_job_removed, m);

if (r < 0)

return log_error_errno(r, "Failed to add match for JobRemoved: %m");

r = sd_bus_add_match(m->bus,

NULL,

"type='signal',"

"sender='org.freedesktop.systemd1',"

"interface='org.freedesktop.systemd1.Manager',"

"member='UnitRemoved',"

"path='/org/freedesktop/systemd1'",

match_unit_removed, m);

if (r < 0)

return log_error_errno(r, "Failed to add match for UnitRemoved: %m");

r = sd_bus_add_match(m->bus,

NULL,

"type='signal',"

"sender='org.freedesktop.systemd1',"

"interface='org.freedesktop.DBus.Properties',"

"member='PropertiesChanged'",

match_properties_changed, m);

if (r < 0)

return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");

r = sd_bus_add_match(m->bus,

NULL,

"type='signal',"

"sender='org.freedesktop.systemd1',"

"interface='org.freedesktop.systemd1.Manager',"

"member='Reloading',"

"path='/org/freedesktop/systemd1'",

match_reloading, m);

if (r < 0)

return log_error_errno(r, "Failed to add match for Reloading: %m");

r = sd_bus_call_method(

m->bus,

"org.freedesktop.systemd1",

"/org/freedesktop/systemd1",

"org.freedesktop.systemd1.Manager",

"Subscribe",

&error,

NULL, NULL);

if (r < 0) {

log_error("Failed to enable subscription: %s", bus_error_message(&error, r));

return r;

}

r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);

if (r < 0)

return log_error_errno(r, "Failed to register name: %m");

r = sd_bus_attach_event(m->bus, m->event, 0);

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;

/*

assert(m->seat0);

seat_read_active_vt(m->seat0);

active = m->seat0->active;

if (!active || active->vtnr < 1) {

log_warning("Received VT_PROCESS signal without a registered session on that VT.");

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 architectures (S390 and Xen, and containers),

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 the device node /dev/tty0 may exist

if (errno == ENOENT)

return 0;

log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");

return -errno;

}

r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);

if (r < 0) {

log_error("Failed to watch foreground console");

return r;

}

/*

if (SIGRTMIN + 1 > SIGRTMAX) {

log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);

return -EINVAL;

}

r = ignore_signals(SIGRTMIN + 1, -1);

if (r < 0)

return log_error_errno(r, "Cannot ignore SIGRTMIN + 1: %m");

r = sigprocmask_many(SIG_BLOCK, SIGRTMIN, -1);

if (r < 0)

return log_error_errno(r, "Cannot block SIGRTMIN: %m");

r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);

if (r < 0)

return r;

return 0;

}

static int manager_connect_udev(Manager *m) {

int r;

assert(m);

assert(!m->udev_seat_monitor);

assert(!m->udev_device_monitor);

assert(!m->udev_vcsa_monitor);

assert(!m->udev_button_monitor);

m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");

if (!m->udev_seat_monitor)

return -ENOMEM;

r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");

if (r < 0)

return r;

r = udev_monitor_enable_receiving(m->udev_seat_monitor);

if (r < 0)

return r;

r = sd_event_add_io(m->event, &m->udev_seat_event_source, udev_monitor_get_fd(m->udev_seat_monitor), EPOLLIN, manager_dispatch_seat_udev, m);

if (r < 0)

return r;

m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");

if (!m->udev_device_monitor)

return -ENOMEM;

r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);

if (r < 0)

return r;

r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);

if (r < 0)

return r;

r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);

if (r < 0)

return r;

r = udev_monitor_enable_receiving(m->udev_device_monitor);

if (r < 0)

return r;

r = sd_event_add_io(m->event, &m->udev_device_event_source, udev_monitor_get_fd(m->udev_device_monitor), EPOLLIN, manager_dispatch_device_udev, m);

if (r < 0)

return r;

/* Don't watch keys if nobody cares */

if (m->handle_power_key != HANDLE_IGNORE ||

m->handle_suspend_key != HANDLE_IGNORE ||

m->handle_hibernate_key != HANDLE_IGNORE ||

m->handle_lid_switch != HANDLE_IGNORE ||

m->handle_lid_switch_docked != HANDLE_IGNORE) {

m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");

if (!m->udev_button_monitor)

return -ENOMEM;

r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");

if (r < 0)

return r;

r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);

if (r < 0)

return r;

r = udev_monitor_enable_receiving(m->udev_button_monitor);

if (r < 0)

return r;

r = sd_event_add_io(m->event, &m->udev_button_event_source, udev_monitor_get_fd(m->udev_button_monitor), EPOLLIN, manager_dispatch_button_udev, m);

if (r < 0)

return r;

}

/* Don't bother watching VCSA devices, if nobody cares */

if (m->n_autovts > 0 && m->console_active_fd >= 0) {

m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");

if (!m->udev_vcsa_monitor)

return -ENOMEM;

r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);

if (r < 0)

return r;

r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);

if (r < 0)

return r;

r = sd_event_add_io(m->event, &m->udev_vcsa_event_source, udev_monitor_get_fd(m->udev_vcsa_monitor), EPOLLIN, manager_dispatch_vcsa_udev, m);

if (r < 0)

return r;

}

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_check_gc(seat, drop_not_started)) {

seat_stop(seat, 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_check_gc(session, drop_not_started) &&

session_get_state(session) != SESSION_CLOSING)

session_stop(session, false);

/* Normally, this should make the session busy again,

if (!session_check_gc(session, drop_not_started)) {

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_check_gc(user, drop_not_started))

user_stop(user, false);

/* Second step: finalize user */

if (!user_check_gc(user, drop_not_started)) {

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

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. Taking 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_startup(Manager *m) {

int r;

Seat *seat;

Session *session;

User *user;

Button *button;

Inhibitor *inhibitor;

Iterator i;

assert(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);

/* And start everything */

HASHMAP_FOREACH(seat, m->seats, i)

seat_start(seat);

HASHMAP_FOREACH(user, m->users, i)

user_start(user);

HASHMAP_FOREACH(session, m->sessions, i)

session_start(session);

HASHMAP_FOREACH(inhibitor, m->inhibitors, i)

inhibitor_start(inhibitor);

HASHMAP_FOREACH(button, m->buttons, i)

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 = sd_event_run(m->event, (uint64_t) -1);

if (r < 0)

return r;

}

}

static int manager_parse_config_file(Manager *m) {

assert(m);

return config_parse_many("/etc/systemd/logind.conf",

CONF_DIRS_NULSTR("systemd/logind.conf"),

"Login\0",

config_item_perf_lookup, logind_gperf_lookup,

false, m);

}

int main(int argc, char *argv[]) {

Manager *m = NULL;

int r;

log_set_target(LOG_TARGET_AUTO);

log_set_facility(LOG_AUTH);

log_parse_environment();

log_open();

umask(0022);

if (argc != 1) {

log_error("This program takes no arguments.");

r = -EINVAL;

goto finish;

}

/* Always create the directories people can create inotify

mkdir_label("/run/systemd/seats", 0755);

mkdir_label("/run/systemd/users", 0755);

mkdir_label("/run/systemd/sessions", 0755);

m = manager_new();

if (!m) {

r = log_oom();

goto finish;

}

manager_parse_config_file(m);

r = manager_startup(m);

if (r < 0) {

log_error_errno(r, "Failed to fully start up daemon: %m");

goto finish;

}

log_debug("systemd-logind running as pid "PID_FMT, getpid());

sd_notify(false,

"READY=1\n"

"STATUS=Processing requests...");

r = manager_run(m);

log_debug("systemd-logind stopped as pid "PID_FMT, getpid());

finish:

sd_notify(false,

"STOPPING=1\n"

"STATUS=Shutting down...");

if (m)

manager_free(m);

return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;

}