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Full Discussion: Process running? Stop it
Top Forums Shell Programming and Scripting Process running? Stop it Post 302500807 by LukasB on Tuesday 1st of March 2011 03:04:08 PM
Old 03-01-2011
Question Process running? Stop it

I have this "process keepalive" script:

Code:
#!/bin/bash

PIDFILE=/tmp/php.pid
PHPSCRIPT=/home/www/mydomain.com/subdomains/www/parser.php

echo 'Checking php process from PID file'
if [ -f $PIDFILE ] ; then
PID=`cat $PIDFILE`
if ps ax | grep -v grep | grep $PID > /dev/null
then
echo "php process still running - great!!!"
else
echo "php process not running - crap!!!"
rm -f $PIDFILE
php $PHPSCRIPT & echo $! > $PIDFILE&
fi
else
echo "Hey no file - first time maybe?"
php $PHPSCRIPT & echo $! > $PIDFILE&
fi

Now, if the process is running, it echoes "php process still running - great!!!".

I would like to do this: if the process is running, stop it. How to do that?

Thank you for any advice...

Last edited by LukasB; 03-01-2011 at 04:10 PM.. Reason: Typos
 

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PIDOF(8)						Linux System Administrator's Manual						  PIDOF(8)

NAME
pidof -- find the process ID of a running program. SYNOPSIS
pidof [-s] [-x] [-o omitpid] [-o omitpid..] program [program..] DESCRIPTION
Pidof finds the process id's (pids) of the named programs. It prints those id's on the standard output. This program is on some systems used in run-level change scripts, especially when the system has a System-V like rc structure. In that case these scripts are located in /etc/rc?.d, where ? is the runlevel. If the system has a start-stop-daemon (8) program that should be used instead. OPTIONS
-s Single shot - this instructs the program to only return one pid. -x Scripts too - this causes the program to also return process id's of shells running the named scripts. -o Tells pidof to omit processes with that process id. The special pid %PPID can be used to name the parent process of the pidof pro- gram, in other words the calling shell or shell script. NOTES
pidof is simply a (symbolic) link to the killall5 program, which should also be located in /sbin. When pidof is invoked with a full pathname to the program it should find the pid of, it is reasonably safe. Otherwise it is possible that it returns pids of running programs that happen to have the same name as the program you're after but are actually other programs. SEE ALSO
shutdown(8), init(8), halt(8), reboot(8) AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl 01 Sep 1998 PIDOF(8)
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