From 4cff19f464c76ca32ed92201008ff01b14696b78 Mon Sep 17 00:00:00 2001
From: Thomas Ries <tries@gmx.net>
Date: Fri, 2 Apr 2004 17:55:41 +0000
Subject: [PATCH] - PID file

---
 ChangeLog                |  1 +
 doc/siproxd.conf.example |  6 ++++++
 src/readconf.c           |  1 +
 src/siproxd.c            | 28 ++++++++++++++++++++++++++++
 src/siproxd.h            |  1 +
 5 files changed, 37 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 6702f1b..979113f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 0.5.5
 =====
+   2-Apr-2004:  - PID file
   31-Mar-2004:  - accessctl.c: text correction in ERROR output
   30-Mar-2004:  - Again '*' Contact header in unREGISTER
                 - new: tools/extract_sip.pl 
diff --git a/doc/siproxd.conf.example b/doc/siproxd.conf.example
index 5ed9a03..caef73a 100644
--- a/doc/siproxd.conf.example
+++ b/doc/siproxd.conf.example
@@ -79,6 +79,12 @@ user = nobody
 #   the specified directory path does exist!
 registration_file = /var/lib/siproxd/siproxd_registrations
 
+######################################################################
+# PID file:
+#   Where to create the PID file.
+#   This file holds the PID of the main thread of siproxd.
+pid_file = /var/run/siproxd/siproxd.pid
+
 ######################################################################
 # global switch to control the RTP proxy behaviour
 #       0 - RTP proxy disabled
diff --git a/src/readconf.c b/src/readconf.c
index 9ff5185..b81bce7 100644
--- a/src/readconf.c
+++ b/src/readconf.c
@@ -169,6 +169,7 @@ static int parse_config (FILE *configfile) {
       { "outbound_proxy_port", TYP_INT4,   &configuration.outbound_proxy_port },
       { "registration_file",   TYP_STRING ,&configuration.registrationfile },
       { "log_calls",           TYP_INT4,   &configuration.log_calls },
+      { "pid_file",            TYP_STRING ,&configuration.pid_file },
       {0, 0, 0}
    };
 
diff --git a/src/siproxd.c b/src/siproxd.c
index dde4003..c60f269 100644
--- a/src/siproxd.c
+++ b/src/siproxd.c
@@ -190,6 +190,23 @@ int main (int argc, char *argv[])
       INFO("daemonized, pid=%i", getpid());
    }
 
+   /* write PID file of main thread */
+   if (configuration.pid_file) {
+      FILE *pidfile;
+      DEBUGC(DBCLASS_CONFIG,"creating PID file [%s]", configuration.pid_file);
+      sts=unlink(configuration.pid_file);
+      if ((sts==0) ||(errno == ENOENT)) {
+         if ((pidfile=fopen(configuration.pid_file, "w"))) {
+            fprintf(pidfile,"%i\n",getpid());
+            fclose(pidfile);
+         } else {
+            WARN("couldn't create new PID file: %s", strerror(errno));
+         }
+      } else {
+         WARN("couldn't delete old PID file: %s", strerror(errno));
+      }
+   }
+
    /* initialize the RTP proxy */
    sts=rtpproxy_init();
    if (sts != STS_SUCCESS) {
@@ -441,9 +458,20 @@ int main (int argc, char *argv[])
    } /* while TRUE */
    exit_prg:
 
+   /* dump current knwon SIP registrations */
    register_shut();
    INFO("properly terminating siproxd");
 
+   /* remove PID file */
+   if (configuration.pid_file) {
+      DEBUGC(DBCLASS_CONFIG,"deleting PID file [%s]", configuration.pid_file);
+      sts=unlink(configuration.pid_file);
+      if (sts != 0) {
+         WARN("couldn't delete old PID file: %s", strerror(errno));
+      }
+   }
+
+   /* END */
    return 0;
 } /* main */
 
diff --git a/src/siproxd.h b/src/siproxd.h
index 206b61f..7df7866 100644
--- a/src/siproxd.h
+++ b/src/siproxd.h
@@ -151,6 +151,7 @@ struct siproxd_config {
    int  outbound_proxy_port;
    char *registrationfile;
    int  log_calls;
+   char *pid_file;
 };