Shell Programming and Scripting

I have a process that crashes quite often. I'm unable to fix it since I'm not the developer and it is beyond my control to do so. However restarting the process will fix the issue which is fine.

I would like to receive a notification via email that the process has failed so I can login and restart the process without having to activelymonitor it.

Is this possible to achieve without installing additional software as this is not allowed for my servers? I was thinking of a bash script like the one below without the threshold only when it fails.

swx - is name process name
500- threshold for permitted processes

Code:

#!/bin/ksh
VAL=`ps -ef | grep -c swx | awk ‘{if ( $1 > 500 ) print $1 }'`
if [ "$VAL" -ge "500" ]; then
echo “$VAL user processes found running with SWX user. Exceeded the Threshold,
Please take immediate action.” | /usr/bin/mailx -s “Alert !! $VAL SWX Applicati
on processes” email@test.com
fi
exit 0

You can add this to crontab like below:

Code:

* * * * * /u02/scripts/userprocmon.sh >/dev/null 2>&1

Thanks in advnace for any help provided

It is more a question of having sendmail installed and configured... which I doubt unless your server is a mail server also... but with a bit of luck may be configured to send to mail server...

I did a sendmail test to my work email account and it worked fine.

So what isnt working?

Code:

#!/bin/ksh
VAL=`ps -ef | grep -c swx | awk ‘{if ( $1 > 500 ) print $1 }’`
echo VAL=$VAL
read kyb # these 2 lines for testing purpose...
if [ "$VAL" -ge 500 ]  # "500" => string  does not match with -ge expecting numeric
then
   echo “$VAL user processes found running with SWX user. Exceeded the Threshold, \
   Please take immediate action.” | \
   /usr/bin/mailx -s “Alert !! $VAL SWX Application processes” email@test.com
fi
exit 0

Can you test by giving VAL different values and modifying if condition so it should send a post...

I would like for modify that script to monitor when the Child process fails. What happens is that I have a parent process that starts and spawns different child processes. If one child process dies then the parent will continue to run but not correctly. I need to be notified if that child process fails

---------- Post updated at 08:35 AM ---------- Previous update was at 06:23 AM ----------

I wanted to clarify something. I realize that I can't reliably count on ps | grep or variants to accurately tell me what PID is started. However I know what I need for interim until this problem is resolved in the next release.

I have a process named Foo that is the parent, Bar is the child process. If Bar dies off Foo will continue to run and will not respawn Bar. How do I know this because the program to restart Bar requires Foo to be restarted first.

So when I want to monitor a child process it is just so I know to login and restart the parent process.

To make change to the ps command I was looking at

Code:

if pgrep "Bar" >/dev/null 2>&1
then
echo "Bar is running
else
echo "Bar is not running"
fi

or

Code:

if ps aux | grep "[B]ar" >/dev/null
then
echo "Bar is running"
else
echo "Bar is not running"
fi

The else portion will then fire off the sendmail to notify me.