Function try_to_start_background_daemon

builtin/fsmonitor--daemon.c:1511–1564

}

static int try_to_start_background_daemon(void)
{
	struct child_process cp = CHILD_PROCESS_INIT;
	enum start_bg_result sbgr;

	/*
	 * Before we try to create a background daemon process, see
	 * if a daemon process is already listening.  This makes it
	 * easier for us to report an already-listening error to the
	 * console, since our spawn/daemon can only report the success
	 * of creating the background process (and not whether it
	 * immediately exited).
	 */
	if (fsmonitor_ipc__get_state() == IPC_STATE__LISTENING)
		die(_("fsmonitor--daemon is already running '%s'"),
		    the_repository->worktree);

	if (fsmonitor__announce_startup) {
		fprintf(stderr, _("starting fsmonitor-daemon in '%s'\n"),
			the_repository->worktree);
		fflush(stderr);
	}

	cp.git_cmd = 1;

	strvec_push(&cp.args, "fsmonitor--daemon");
	strvec_push(&cp.args, "run");
	strvec_push(&cp.args, "--detach");
	strvec_pushf(&cp.args, "--ipc-threads=%d", fsmonitor__ipc_threads);

	cp.no_stdin = 1;
	cp.no_stdout = 1;
	cp.no_stderr = 1;
	cp.close_fd_above_stderr = 1;

	sbgr = start_bg_command(&cp, bg_wait_cb, NULL,
				fsmonitor__start_timeout_sec);

	switch (sbgr) {
	case SBGR_READY:
		return 0;

	default:
	case SBGR_ERROR:
	case SBGR_CB_ERROR:
		return error(_("daemon failed to start"));

	case SBGR_TIMEOUT:
		return error(_("daemon not online yet"));

	case SBGR_DIED:
		return error(_("daemon terminated"));
	}
}

int cmd_fsmonitor__daemon(int argc,
			  const char **argv,