#include <errno.h>

#include <pwd.h>

#include <libudev.h>

#include <fcntl.h>

#include <string.h>

#include <unistd.h>

#include <sys/epoll.h>

#include <sys/ioctl.h>

#include <linux/vt.h>

#include "logind.h"

#include "dbus-common.h"

#include "dbus-loop.h"

#include "strv.h"

#include "conf-parser.h"

Manager *manager_new(void) {

Manager *m;

m = new0(Manager, 1);

if (!m)

return NULL;

m->console_active_fd = -1;

m->bus_fd = -1;

m->udev_seat_fd = -1;

m->udev_vcsa_fd = -1;

m->epoll_fd = -1;

m->n_autovts = 6;

m->devices = hashmap_new(string_hash_func, string_compare_func);

m->seats = hashmap_new(string_hash_func, string_compare_func);

m->sessions = hashmap_new(string_hash_func, string_compare_func);

m->users = hashmap_new(trivial_hash_func, trivial_compare_func);

m->cgroups = hashmap_new(string_hash_func, string_compare_func);

m->fifo_fds = hashmap_new(trivial_hash_func, trivial_compare_func);

if (!m->devices || !m->seats || !m->sessions || !m->users || !m->cgroups || !m->fifo_fds) {

manager_free(m);

return NULL;

}

m->reset_controllers = strv_new("cpu", NULL);

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

if (!m->reset_controllers || !m->kill_exclude_users) {

manager_free(m);

return NULL;

}

m->udev = udev_new();

if (!m->udev) {

manager_free(m);

return NULL;

}

if (cg_get_user_path(&m->cgroup_path) < 0) {

manager_free(m);

return NULL;

}

return m;

}

void manager_free(Manager *m) {

Session *session;

User *u;

Device *d;

Seat *s;

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);

hashmap_free(m->sessions);

hashmap_free(m->users);

hashmap_free(m->devices);

hashmap_free(m->seats);

hashmap_free(m->cgroups);

hashmap_free(m->fifo_fds);

if (m->console_active_fd >= 0)

close_nointr_nofail(m->console_active_fd);

if (m->udev_seat_monitor)

udev_monitor_unref(m->udev_seat_monitor);

if (m->udev_vcsa_monitor)

udev_monitor_unref(m->udev_vcsa_monitor);

if (m->udev)

udev_unref(m->udev);

if (m->bus) {

dbus_connection_flush(m->bus);

dbus_connection_close(m->bus);

dbus_connection_unref(m->bus);

}

if (m->bus_fd >= 0)

close_nointr_nofail(m->bus_fd);

if (m->epoll_fd >= 0)

close_nointr_nofail(m->epoll_fd);

strv_free(m->controllers);

strv_free(m->reset_controllers);

strv_free(m->kill_only_users);

strv_free(m->kill_exclude_users);

free(m->cgroup_path);

free(m);

}

int manager_add_device(Manager *m, const char *sysfs, Device **_device) {

Device *d;

assert(m);

assert(sysfs);

d = hashmap_get(m->devices, sysfs);

if (d) {

if (_device)

*_device = d;

return 0;

}

d = device_new(m, sysfs);

if (!d)

return -ENOMEM;

if (_device)

*_device = d;

return 0;

}

int manager_add_seat(Manager *m, const char *id, Seat **_seat) {

Seat *s;

assert(m);

assert(id);

s = hashmap_get(m->seats, id);

if (s) {

if (_seat)

*_seat = s;

return 0;

}

s = seat_new(m, id);

if (!s)

return -ENOMEM;

if (_seat)

*_seat = s;

return 0;

}

int manager_add_session(Manager *m, User *u, const char *id, Session **_session) {

Session *s;

assert(m);

assert(id);

s = hashmap_get(m->sessions, id);

if (s) {

if (_session)

*_session = s;

return 0;

}

s = session_new(m, u, id);

if (!s)

return -ENOMEM;

if (_session)

*_session = s;

return 0;

}

int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) {

User *u;

assert(m);

assert(name);

u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));

if (u) {

if (_user)

*_user = u;

return 0;

}

u = user_new(m, uid, gid, name);

if (!u)

return -ENOMEM;

if (_user)

*_user = u;

return 0;

}

int manager_add_user_by_name(Manager *m, const char *name, User **_user) {

uid_t uid;

gid_t gid;

int r;

assert(m);

assert(name);

r = get_user_creds(&name, &uid, &gid, NULL);

if (r < 0)

return r;

return manager_add_user(m, uid, gid, name, _user);

}

int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {

struct passwd *p;

assert(m);

errno = 0;

p = getpwuid(uid);

if (!p)

return errno ? -errno : -ENOENT;

return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);

}

int manager_process_seat_device(Manager *m, struct udev_device *d) {

Device *device;

int r;

assert(m);

if (streq_ptr(udev_device_get_action(d), "remove")) {

device = hashmap_get(m->devices, udev_device_get_syspath(d));

if (!device)

return 0;

seat_add_to_gc_queue(device->seat);

device_free(device);

} else {

const char *sn;

Seat *seat;

sn = udev_device_get_property_value(d, "ID_SEAT");

if (isempty(sn))

sn = "seat0";

if (!seat_name_is_valid(sn)) {

log_warning("Device with invalid seat name %s found, ignoring.", sn);

return 0;

}

r = manager_add_device(m, udev_device_get_syspath(d), &device);

if (r < 0)

return r;

r = manager_add_seat(m, sn, &seat);

if (r < 0) {

if (!device->seat)

device_free(device);

return r;

}

device_attach(device, seat);

seat_start(seat);

}

return 0;

}

int manager_enumerate_devices(Manager *m) {

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

struct udev_enumerate *e;

int r;

assert(m);

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

e = udev_enumerate_new(m->udev);

if (!e) {

r = -ENOMEM;

goto finish;

}

r = udev_enumerate_add_match_subsystem(e, "graphics");

if (r < 0)

goto finish;

r = udev_enumerate_add_match_tag(e, "seat");

if (r < 0)

goto finish;

r = udev_enumerate_scan_devices(e);

if (r < 0)

goto finish;

first = udev_enumerate_get_list_entry(e);

udev_list_entry_foreach(item, first) {

struct udev_device *d;

int k;

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

if (!d) {

r = -ENOMEM;

goto finish;

}

k = manager_process_seat_device(m, d);

udev_device_unref(d);

if (k < 0)

r = k;

}

finish:

if (e)

udev_enumerate_unref(e);

return r;

}

int manager_enumerate_seats(Manager *m) {

DIR *d;

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

return -errno;

}

while ((de = readdir(d))) {

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;

}

closedir(d);

return r;

}

static int manager_enumerate_users_from_cgroup(Manager *m) {

int r = 0;

char *name;

DIR *d;

int k;

r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_path, &d);

if (r < 0) {

if (r == -ENOENT)

return 0;

log_error("Failed to open %s: %s", m->cgroup_path, strerror(-r));

return r;

}

while ((k = cg_read_subgroup(d, &name)) > 0) {

User *user;

k = manager_add_user_by_name(m, name, &user);

if (k < 0) {

free(name);

r = k;

continue;

}

user_add_to_gc_queue(user);

if (!user->cgroup_path)

if (asprintf(&user->cgroup_path, "%s/%s", m->cgroup_path, name) < 0) {

r = -ENOMEM;

free(name);

break;

}

free(name);

}

if (r >= 0 && k < 0)

r = k;

closedir(d);

return r;

}

static int manager_enumerate_linger_users(Manager *m) {

DIR *d;

struct dirent *de;

int r = 0;

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

if (!d) {

if (errno == ENOENT)

return 0;

log_error("Failed to open /var/lib/systemd/linger/: %m");

return -errno;

}

while ((de = readdir(d))) {

int k;

if (!dirent_is_file(de))

continue;

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

if (k < 0) {

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

r = k;

}

}

closedir(d);

return r;

}

int manager_enumerate_users(Manager *m) {

DIR *d;

struct dirent *de;

int r, k;

assert(m);

/* First, enumerate user cgroups */

r = manager_enumerate_users_from_cgroup(m);

/* Second, add lingering users on top */

k = manager_enumerate_linger_users(m);

if (k < 0)

r = k;

/* Third, read in user data stored on disk */

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

if (!d) {

if (errno == ENOENT)

return 0;

log_error("Failed to open /run/systemd/users: %m");

return -errno;

}

while ((de = readdir(d))) {

uid_t uid;

User *u;

if (!dirent_is_file(de))

continue;

k = parse_uid(de->d_name, &uid);

if (k < 0) {

log_error("Failed to parse file name %s: %s", de->d_name, strerror(-k));

continue;

}

u = hashmap_get(m->users, ULONG_TO_PTR(uid));

if (!u) {

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

continue;

}

k = user_load(u);

if (k < 0)

r = k;

}

closedir(d);

return r;

}

static int manager_enumerate_sessions_from_cgroup(Manager *m) {

User *u;

Iterator i;

int r = 0;

HASHMAP_FOREACH(u, m->users, i) {

DIR *d;

char *name;

int k;

if (!u->cgroup_path)

continue;

k = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &d);

if (k < 0) {

if (k == -ENOENT)

continue;

log_error("Failed to open %s: %s", u->cgroup_path, strerror(-k));

r = k;

continue;

}

while ((k = cg_read_subgroup(d, &name)) > 0) {

Session *session;

if (streq(name, "shared"))

continue;

k = manager_add_session(m, u, name, &session);

if (k < 0) {

free(name);

break;

}

session_add_to_gc_queue(session);

if (!session->cgroup_path)

if (asprintf(&session->cgroup_path, "%s/%s", u->cgroup_path, name) < 0) {

k = -ENOMEM;

free(name);

break;

}

free(name);

}

closedir(d);

if (k < 0)

r = k;

}

return r;

}

int manager_enumerate_sessions(Manager *m) {

DIR *d;

struct dirent *de;

int r = 0;

assert(m);

/* First enumerate session cgroups */

r = manager_enumerate_sessions_from_cgroup(m);

/* Second, read in session data stored on disk */

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

if (!d) {

if (errno == ENOENT)

return 0;

log_error("Failed to open /run/systemd/sessions: %m");

return -errno;

}

while ((de = readdir(d))) {

struct Session *s;

int k;

if (!dirent_is_file(de))

continue;

s = hashmap_get(m->sessions, de->d_name);

if (!s) {

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

continue;

}

k = session_load(s);

if (k < 0)

r = k;

}

closedir(d);

return r;

}

int manager_dispatch_seat_udev(Manager *m) {

struct udev_device *d;

int r;

assert(m);

d = udev_monitor_receive_device(m->udev_seat_monitor);

if (!d)

return -ENOMEM;

r = manager_process_seat_device(m, d);

udev_device_unref(d);

return r;

}

int manager_dispatch_vcsa_udev(Manager *m) {

struct udev_device *d;

int r = 0;

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"))

r = seat_preallocate_vts(m->vtconsole);

udev_device_unref(d);

return r;

}

int manager_dispatch_console(Manager *m) {

assert(m);

if (m->vtconsole)

seat_read_active_vt(m->vtconsole);

return 0;

}

static int vt_is_busy(int vtnr) {

struct vt_stat vt_stat;

int r = 0, fd;

assert(vtnr >= 1);

/* We explicitly open /dev/tty1 here instead of /dev/tty0. If

fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC);

if (fd < 0)

return -errno;

if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0)

r = -errno;

else

r = !!(vt_stat.v_state & (1 << vtnr));

close_nointr_nofail(fd);

return r;

}

int manager_spawn_autovt(Manager *m, int vtnr) {

int r;

DBusMessage *message = NULL, *reply = NULL;

char *name = NULL;

const char *mode = "fail";

DBusError error;

assert(m);

assert(vtnr >= 1);

dbus_error_init(&error);

if ((unsigned) vtnr > m->n_autovts)

return 0;

r = vt_is_busy(vtnr);

if (r < 0)

return r;

else if (r > 0)

return -EBUSY;

message = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit");

if (!message) {

log_error("Could not allocate message.");

r = -ENOMEM;

goto finish;

}

if (asprintf(&name, "autovt@tty%i.service", vtnr) < 0) {

log_error("Could not allocate service name.");

r = -ENOMEM;

goto finish;

}

if (!dbus_message_append_args(message,

DBUS_TYPE_STRING, &name,

DBUS_TYPE_STRING, &mode,

DBUS_TYPE_INVALID)) {

log_error("Could not attach target and flag information to message.");

r = -ENOMEM;

goto finish;

}

reply = dbus_connection_send_with_reply_and_block(m->bus, message, -1, &error);

if (!reply) {

log_error("Failed to start unit: %s", bus_error_message(&error));

goto finish;

}

r = 0;

finish:

free(name);

if (message)

dbus_message_unref(message);

if (reply)

dbus_message_unref(reply);

dbus_error_free(&error);

return r;

}

void manager_cgroup_notify_empty(Manager *m, const char *cgroup) {

Session *s;

char *p;

assert(m);

assert(cgroup);

p = strdup(cgroup);

if (!p) {

log_error("Out of memory.");

return;

}

for (;;) {

char *e;

if (isempty(p) || streq(p, "/"))

break;

s = hashmap_get(m->cgroups, p);

if (s)

session_add_to_gc_queue(s);

assert_se(e = strrchr(p, '/'));

*e = 0;

}

free(p);

}

static void manager_pipe_notify_eof(Manager *m, int fd) {

Session *s;

assert_se(m);

assert_se(fd >= 0);

assert_se(s = hashmap_get(m->fifo_fds, INT_TO_PTR(fd + 1)));

assert(s->fifo_fd == fd);

session_remove_fifo(s);

session_stop(s);

}

static int manager_connect_bus(Manager *m) {

DBusError error;

int r;

struct epoll_event ev;

assert(m);

assert(!m->bus);

assert(m->bus_fd < 0);

dbus_error_init(&error);

m->bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);

if (!m->bus) {

log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error));

r = -ECONNREFUSED;

goto fail;

}

if (!dbus_connection_register_object_path(m->bus, "/org/freedesktop/login1", &bus_manager_vtable, m) ||

!dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/seat", &bus_seat_vtable, m) ||

!dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/session", &bus_session_vtable, m) ||

!dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/user", &bus_user_vtable, m) ||

!dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) {

log_error("Not enough memory");

r = -ENOMEM;

goto fail;

}

dbus_bus_add_match(m->bus,

"type='signal',"

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

"member='Released',"

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

&error);

if (dbus_error_is_set(&error)) {

log_error("Failed to register match: %s", bus_error_message(&error));

r = -EIO;

goto fail;

}

r = dbus_bus_request_name(m->bus, "org.freedesktop.login1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error);

if (dbus_error_is_set(&error)) {

log_error("Failed to register name on bus: %s", bus_error_message(&error));

r = -EIO;

goto fail;

}

if (r != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {

log_error("Failed to acquire name.");

r = -EEXIST;

goto fail;

}

m->bus_fd = bus_loop_open(m->bus);

if (m->bus_fd < 0) {

r = m->bus_fd;

goto fail;

}

zero(ev);

ev.events = EPOLLIN;

ev.data.u32 = FD_BUS;

if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->bus_fd, &ev) < 0)

goto fail;

return 0;

fail:

dbus_error_free(&error);

return r;

}

static int manager_connect_console(Manager *m) {

struct epoll_event ev;

assert(m);

assert(m->console_active_fd < 0);

m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);

if (m->console_active_fd < 0) {

/* On certain architectures (S390 and Xen), /dev/tty0

if (errno == ENOENT)

return 0;

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

return -errno;

}

zero(ev);

ev.events = 0;

ev.data.u32 = FD_CONSOLE;

if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->console_active_fd, &ev) < 0)

return -errno;

return 0;

}

static int manager_connect_udev(Manager *m) {

struct epoll_event ev;

int r;

assert(m);

assert(!m->udev_seat_monitor);

assert(!m->udev_vcsa_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, "seat");

if (r < 0)

return r;

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

if (r < 0)

return r;

r = udev_monitor_enable_receiving(m->udev_seat_monitor);

if (r < 0)

return r;

m->udev_seat_fd = udev_monitor_get_fd(m->udev_seat_monitor);

zero(ev);

ev.events = EPOLLIN;

ev.data.u32 = FD_SEAT_UDEV;

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

if (m->n_autovts <= 0 || m->console_active_fd < 0)

return 0;

if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_seat_fd, &ev) < 0)

return -errno;

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;

m->udev_vcsa_fd = udev_monitor_get_fd(m->udev_vcsa_monitor);

zero(ev);

ev.events = EPOLLIN;

ev.data.u32 = FD_VCSA_UDEV;

if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_vcsa_fd, &ev) < 0)

return -errno;

return 0;

}

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(Seat, gc_queue, m->seat_gc_queue, seat);

seat->in_gc_queue = false;

if (seat_check_gc(seat, drop_not_started) == 0) {

seat_stop(seat);

seat_free(seat);

}

}

while ((session = m->session_gc_queue)) {

LIST_REMOVE(Session, gc_queue, m->session_gc_queue, session);

session->in_gc_queue = false;

if (session_check_gc(session, drop_not_started) == 0) {

session_stop(session);

session_free(session);

}

}

while ((user = m->user_gc_queue)) {

LIST_REMOVE(User, gc_queue, m->user_gc_queue, user);

user->in_gc_queue = false;

if (user_check_gc(user, drop_not_started) == 0) {

user_stop(user);

user_free(user);

}

}

}

int manager_get_idle_hint(Manager *m, dual_timestamp *t) {

Session *s;

bool idle_hint = true;

dual_timestamp ts = { 0, 0 };

Iterator i;

assert(m);

HASHMAP_FOREACH(s, m->sessions, i) {

dual_timestamp k;

int ih;

ih = session_get_idle_hint(s, &k);

if (ih < 0)

return ih;

if (!ih) {

if (!idle_hint) {

if (k.monotonic < ts.monotonic)

ts = k;

} else {

idle_hint = false;

ts = k;

}

} else if (idle_hint) {

if (k.monotonic > ts.monotonic)

ts = k;

}

}

if (t)

*t = ts;

return idle_hint;

}

int manager_startup(Manager *m) {

int r;

Seat *seat;

Session *session;

User *user;

Iterator i;

assert(m);

assert(m->epoll_fd <= 0);

m->epoll_fd = epoll_create1(EPOLL_CLOEXEC);

if (m->epoll_fd < 0)

return -errno;

/* 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 r;

/* 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->vtconsole);

if (r < 0)

return r;

/* Deserialize state */

manager_enumerate_devices(m);

manager_enumerate_seats(m);

manager_enumerate_users(m);

manager_enumerate_sessions(m);

/* Remove stale objects before we start them */

manager_gc(m, false);

/* 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);

return 0;

}

int manager_run(Manager *m) {

assert(m);

for (;;) {

struct epoll_event event;

int n;

manager_gc(m, true);

if (dbus_connection_dispatch(m->bus) != DBUS_DISPATCH_COMPLETE)

continue;

manager_gc(m, true);

n = epoll_wait(m->epoll_fd, &event, 1, -1);

if (n < 0) {

if (errno == EINTR || errno == EAGAIN)

continue;

log_error("epoll() failed: %m");

return -errno;

}

switch (event.data.u32) {

case FD_SEAT_UDEV:

manager_dispatch_seat_udev(m);

break;

case FD_VCSA_UDEV:

manager_dispatch_vcsa_udev(m);

break;

case FD_CONSOLE:

manager_dispatch_console(m);

break;

case FD_BUS:

bus_loop_dispatch(m->bus_fd);

break;

default:

if (event.data.u32 >= FD_FIFO_BASE)

manager_pipe_notify_eof(m, event.data.u32 - FD_FIFO_BASE);

}

}

return 0;

}

static int manager_parse_config_file(Manager *m) {

FILE *f;

const char *fn;

int r;

assert(m);

fn = "/etc/systemd/systemd-logind.conf";

f = fopen(fn, "re");

if (!f) {

if (errno == ENOENT)

return 0;

log_warning("Failed to open configuration file %s: %m", fn);

return -errno;

}

r = config_parse(fn, f, "Login\0", config_item_perf_lookup, (void*) logind_gperf_lookup, false, m);

if (r < 0)

log_warning("Failed to parse configuration file: %s", strerror(-r));

fclose(f);

return r;

}

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

Manager *m = NULL;

int r;

log_set_target(LOG_TARGET_AUTO);

log_parse_environment();

log_open();

umask(0022);

if (argc != 1) {

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

r = -EINVAL;

goto finish;

}

m = manager_new();

if (!m) {

log_error("Out of memory");

r = -ENOMEM;

goto finish;

}

manager_parse_config_file(m);

r = manager_startup(m);

if (r < 0) {

log_error("Failed to fully start up daemon: %s", strerror(-r));

goto finish;

}

log_debug("systemd-logind running as pid %lu", (unsigned long) getpid());

sd_notify(false,

"READY=1\n"

"STATUS=Processing requests...");

r = manager_run(m);

log_debug("systemd-logind stopped as pid %lu", (unsigned long) getpid());

finish:

sd_notify(false,

"STATUS=Shutting down...");

if (m)

manager_free(m);

return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;

}