static void start_target(const char *target, const char *mode) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
assert(target);
r = bus_connect_system_systemd(&bus);
if (r < 0) {
log_error_errno(r, "Failed to get D-Bus connection: %m");
return;
}
log_info("Running request %s/start/replace", target);
/* Start these units only if we can replace base.target with it */
r = sd_bus_call_method(bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"StartUnitReplace",
&error,
NULL,
"sss", "basic.target", target, mode);
/* Don't print a warning if we aren't called during startup */
if (r < 0 && !sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_JOB))
log_error("Failed to start unit: %s", bus_error_message(&error, r));
}
int main(int argc, char *argv[]) {
static const char* const sulogin_cmdline[] = {SULOGIN, NULL};
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
print_mode(argc > 1 ? argv[1] : "");
(void) fork_wait(sulogin_cmdline);
r = bus_connect_system_systemd(&bus);
if (r < 0) {
log_warning_errno(r, "Failed to get D-Bus connection: %m");
r = 0;
} else {
(void) reload_manager(bus);
r = start_default_target(bus);
}
return r >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
static int server_init(Server *s, unsigned n_sockets) {
int r;
unsigned i;
assert(s);
assert(n_sockets > 0);
zero(*s);
s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
if (s->epoll_fd < 0) {
r = log_error_errno(errno,
"Failed to create epoll object: %m");
goto fail;
}
for (i = 0; i < n_sockets; i++) {
struct epoll_event ev;
Fifo *f;
int fd;
fd = SD_LISTEN_FDS_START+i;
r = sd_is_fifo(fd, NULL);
if (r < 0) {
log_error_errno(r, "Failed to determine file descriptor type: %m");
goto fail;
}
if (!r) {
log_error("Wrong file descriptor type.");
r = -EINVAL;
goto fail;
}
f = new0(Fifo, 1);
if (!f) {
r = -ENOMEM;
log_error_errno(errno, "Failed to create fifo object: %m");
goto fail;
}
f->fd = -1;
zero(ev);
ev.events = EPOLLIN;
ev.data.ptr = f;
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
r = -errno;
fifo_free(f);
log_error_errno(errno, "Failed to add fifo fd to epoll object: %m");
goto fail;
}
f->fd = fd;
LIST_PREPEND(fifo, s->fifos, f);
f->server = s;
s->n_fifos++;
}
r = bus_connect_system_systemd(&s->bus);
if (r < 0) {
log_error_errno(r, "Failed to get D-Bus connection: %m");
r = -EIO;
goto fail;
}
return 0;
fail:
server_done(s);
return r;
}