5 pidfile.h - interact with pidfiles
6 Copyright (c) 1995 Martin Schulze <Martin.Schulze@Linux.DE>
8 This file is part of the sysklogd package, a kernel and system log daemon.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 * Reads the specified pidfile and returns the read pid.
29 * 0 is returned if either there's no pidfile, it's empty
30 * or no pid can be read.
32 extern pid_t read_pid(const char *pidfile);
36 * Reads the pid using read_pid and looks up the pid in the process
37 * table (using /proc) to determine if the process already exists. If
38 * so 1 is returned, otherwise 0.
40 extern pid_t check_pid(const char *pidfile);
44 * Writes the pid to the specified file. If that fails 0 is
45 * returned, otherwise the pid.
47 extern pid_t write_pid(const char *pidfile);
51 * Remove the the specified file. The result from unlink(2)
54 extern int remove_pid(const char *pidfile);