Hello All,

I have a serious problem about daemonizing my executable perl script ( I used a free compiler on the net, perlc ) . I use standart template ( Centos 5.9 ) but due to a problem I could not figure out the reason, after random time it fails to start, and since I made it in while loop it restarts forever. For example, it works 2-3 hours, then it fails and begins to restart forever. After waiting for a while ( for example; 20 minutes ) when I try to start it again, it works. So I thought can it be related to memory usage or something like that, but what should I do to solve it ?

Perl script has an infinite loop ( while (1) ), after opening a socket connection to another server it enters this loop and uses this connection to transmit some hex codes produced in the script if it sees a certain file in a certain folder ( so it checks that place continuously ). Unfortunately I cannot share the code here, but my question is what is the best way to clear all variables at the end of the last step and start the loop like it was first try ?

Here is the daemon code;

#!/bin/sh
#
#chkconfig: 2345 99 30
#description: myScript
#processname: myScript

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 1
# Process name ( For display )
NAME=myScript
# Daemon name, where is the actual executable
DAEMON=/myScript/APP/myScript
# Daemon user
DAEMONUSER=scriptUser
# pid file for the daemon
PIDFILE=/var/run/myScript/myScript.pid
# log file for deamon
LOGFILE=/var/log/myScript.log

# Define variables
PS_CMD="ps -e -o pid,args"
proc_list=`$PS_CMD | grep $NAME | grep -v grep | grep -v mqReader | gr
+ep -v sh | grep -v vi | grep -v su | grep -v tail`
procs=`echo $proc_list | awk '{print $1}'`

start () {
        # see if it exists
        if [ -n "$procs" ]; then
                echo "$NAME is already running..."
        elif [ -e "$PIDFILE" ]; then
                echo "$NAME is already running..."
        else
                # start daemon
                while [ 1 ]
                do
                        touch $PIDFILE
                        daemon +9 $DAEMON >> $LOGFILE

                        echo "#---------------------------------------
+-----------#" >> $LOGFILE
                        echo "# $NAME quit due to error, re-running in
+ 15 seconds #" >> $LOGFILE
                        echo "#---------------------------------------
+-----------#" >> $LOGFILE

                        sleep 15
                        killproc $NAME
                        rm -rf $PIDFILE
                done
        fi
}

stop () {
        # see if it exists
        if [ -n "$procs" ]; then
                # stop daemon
                killproc $NAME
                rm -rf $PIDFILE
                echo -e "\n`date +%a' '%b' '%d' '%H:%M:%S' '%Y` - $NAM
+E has been stopped...\n" >> $LOGFILE
        elif [ -e "$PIDFILE" ]; then
                rm -rf $PIDFILE
                echo -e "\n`date +%a' '%b' '%d' '%H:%M:%S' '%Y` - $NAM
+E pid file deleted...\n" >> $LOGFILE
                killproc $NAME
        else
                killproc $NAME
                echo "$NAME is not running..."
        fi
}

case "$1" in
  start)
        start &
    ;;
  stop)
        stop
    ;;
  status)
        status $NAME
        RETVAL=$?
        ;;
  *)
    echo $"Usage: $0 {start|stop|status}"
    exit 1
    ;;
esac

exit 0
[download]

and here is the log file;

Thu May  9 12:03:17 2013 - myScript has been started...

^[[60G[^[[0;32m  OK  ^[[0;39m]^M#-------------------------------------
+-------------#
# myScript quit due to error, re-running in 15 seconds #
#--------------------------------------------------#

Thu May  9 12:03:33 2013 - myScript has been started...

^[[60G[^[[0;32m  OK  ^[[0;39m]^M#-------------------------------------
+-------------#
# myScript quit due to error, re-running in 15 seconds #
#--------------------------------------------------#

Thu May  9 12:03:48 2013 - myScript has been started...

^[[60G[^[[0;32m  OK  ^[[0;39m]^M#-------------------------------------
+-------------#
# myScript quit due to error, re-running in 15 seconds #
#--------------------------------------------------#

Thu May  9 12:04:04 2013 - myScript has been started...

^[[60G[^[[0;32m  OK  ^[[0;39m]^M#-------------------------------------
+-------------#
# myScript quit due to error, re-running in 15 seconds #
#--------------------------------------------------#

Thu May  9 12:04:19 2013 - myScript has been started...

^[[60G[^[[0;32m  OK  ^[[0;39m]^M#-------------------------------------
+-------------#
# myScript quit due to error, re-running in 15 seconds #
#--------------------------------------------------#

Thu May  9 12:04:35 2013 - myScript has been started...

^[[60G[^[[0;32m  OK  ^[[0;39m]^M#-------------------------------------
+-------------#
# myScript quit due to error, re-running in 15 seconds #
#--------------------------------------------------#
[download]

Problem solved;

I found the problem but I think I did not understand some of it.

First of all, I forgot an "exit" in the code, so I fixed that one

The other thing is, I used last but noticed that its in one loop ( was thinking it was in two loops ) so either I was thinking something wrong or using "last" wrongly.

All thanks to people pointing me to return source code executions. While its executable it did not give proper errors but in source code part, it showed faulty parts. And it was not related to daemonizing part. Thanks again.