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+/*
+ pidfile.h - interact with pidfiles
+ Copyright (c) 1995 Martin Schulze <Martin.Schulze@Linux.DE>
+
+ * This file is part of rsyslog.
+ *
+ * Rsyslog is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Rsyslog is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Rsyslog. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+*/
+
+/* read_pid
+ *
+ * Reads the specified pidfile and returns the read pid.
+ * 0 is returned if either there's no pidfile, it's empty
+ * or no pid can be read.
+ */
+int read_pid (char *pidfile);
+
+/* check_pid
+ *
+ * Reads the pid using read_pid and looks up the pid in the process
+ * table (using /proc) to determine if the process already exists. If
+ * so 1 is returned, otherwise 0.
+ */
+int check_pid (char *pidfile);
+
+/* write_pid
+ *
+ * Writes the pid to the specified file. If that fails 0 is
+ * returned, otherwise the pid.
+ */
+int write_pid (char *pidfile);
+
+/* remove_pid
+ *
+ * Remove the the specified file. The result from unlink(2)
+ * is returned
+ */
+int remove_pid (char *pidfile);