int main(int argc, char *argv[]) {
int r, exit_code = 0;
DBusConnection *bus = NULL;
DBusError error;
_cleanup_close_ int fd = -1;
dbus_error_init(&error);
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
if (!bus) {
log_error("Failed to connect to bus: %s", bus_error_message(&error));
r = -EIO;
goto finish;
}
if (arg_action == ACTION_LIST) {
r = print_inhibitors(bus, &error);
if (r < 0) {
log_error("Failed to list inhibitors: %s", bus_error(&error, r));
goto finish;
}
} else {
char *w = NULL;
pid_t pid;
if (!arg_who)
arg_who = w = strv_join(argv + optind, " ");
fd = inhibit(bus, &error);
free(w);
if (fd < 0) {
log_error("Failed to inhibit: %s", bus_error(&error, r));
r = fd;
goto finish;
}
pid = fork();
if (pid < 0) {
log_error("Failed to fork: %m");
r = -errno;
goto finish;
}
if (pid == 0) {
/* Child */
safe_close(fd);
close_all_fds(NULL, 0);
execvp(argv[optind], argv + optind);
log_error("Failed to execute %s: %m", argv[optind]);
_exit(EXIT_FAILURE);
}
r = wait_for_terminate_and_warn(argv[optind], pid);
if (r >= 0)
exit_code = r;
}
finish:
if (bus) {
dbus_connection_close(bus);
dbus_connection_unref(bus);
}
dbus_error_free(&error);
return r < 0 ? EXIT_FAILURE : exit_code;
}
static int manager_connect_bus(Manager *m) {
DBusError error;
int r;
struct epoll_event ev = {
.events = EPOLLIN,
.data.u32 = FD_BUS,
};
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/machine1", &bus_manager_vtable, m) ||
!dbus_connection_register_fallback(m->bus, "/org/freedesktop/machine1/machine", &bus_machine_vtable, m) ||
!dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) {
r = log_oom();
goto fail;
}
dbus_bus_add_match(m->bus,
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.systemd1.Manager',"
"member='JobRemoved',"
"path='/org/freedesktop/systemd1'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to add match for JobRemoved: %s", bus_error_message(&error));
dbus_error_free(&error);
}
dbus_bus_add_match(m->bus,
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.systemd1.Manager',"
"member='UnitRemoved',"
"path='/org/freedesktop/systemd1'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to add match for UnitRemoved: %s", bus_error_message(&error));
dbus_error_free(&error);
}
dbus_bus_add_match(m->bus,
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.DBus.Properties',"
"member='PropertiesChanged'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to add match for PropertiesChanged: %s", bus_error_message(&error));
dbus_error_free(&error);
}
dbus_bus_add_match(m->bus,
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.systemd1.Manager',"
"member='Reloading',"
"path='/org/freedesktop/systemd1'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to add match for Reloading: %s", bus_error_message(&error));
dbus_error_free(&error);
}
r = bus_method_call_with_reply(
m->bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"Subscribe",
NULL,
&error,
DBUS_TYPE_INVALID);
if (r < 0) {
log_error("Failed to enable subscription: %s", bus_error(&error, r));
dbus_error_free(&error);
}
r = dbus_bus_request_name(m->bus, "org.freedesktop.machine1", 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;
}
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;
}
void manager_gc(Manager *m, bool drop_not_started) {
Machine *machine;
assert(m);
while ((machine = m->machine_gc_queue)) {
LIST_REMOVE(gc_queue, m->machine_gc_queue, machine);
machine->in_gc_queue = false;
if (machine_check_gc(machine, drop_not_started) == 0) {
machine_stop(machine);
machine_free(machine);
}
}
}