2 * Copyright (C) 2012 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 (** Handle the locking that ensures only one instance of the
20 daemon can run per user. *)
22 val create_lock : string -> unit
23 (** [create_lock jobsdir] creates the lock file (called [daemon_pid])
24 in the [jobsdir] directory. The lock is automatically released
25 when the process exits. *)
27 val update_pid : unit -> unit
28 (** Call this if the PID of the program changes, ie. after fork. *)
30 val test_locked : string -> bool
31 (** Test if there is a lock file and the lock is held by another process. *)
33 val kill_daemon : string -> unit
34 (** If there is a daemon holding the lock, kill it. *)