2 pidfile.h - interact with pidfiles
3 Copyright (c) 1995 Martin Schulze <Martin.Schulze@Linux.DE>
5 This file is part of the sysklogd package, a kernel and system log daemon.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 * Reads the specified pidfile and returns the read pid.
26 * 0 is returned if either there's no pidfile, it's empty
27 * or no pid can be read.
29 extern pid_t read_pid (const char *pidfile);
33 * Reads the pid using read_pid and looks up the pid in the process
34 * table (using /proc) to determine if the process already exists. If
35 * so 1 is returned, otherwise 0.
37 extern pid_t check_pid (const char *pidfile);
41 * Writes the pid to the specified file. If that fails 0 is
42 * returned, otherwise the pid.
44 extern pid_t write_pid (const char *pidfile);
48 * Remove the the specified file. The result from unlink(2)
51 extern int remove_pid (const char *pidfile);