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Top Forums Shell Programming and Scripting Creating a daemon to run in background Post 302496265 by ukndoit on Sunday 13th of February 2011 06:51:28 AM
Old 02-13-2011
Creating a daemon to run in background

I am trying to create a service to always run and monitor a script that has a tendency to hang, we could not find what is causing it to hang so are in the process of completely reprogramming just about everything, however, that will take upto 6 months.

So I need to create this to monitor the script to make sure it does not run wild which it does once in a while, sometimes only once per month, once per week or sometimes once per day or hour.

So here is what I am trying to do:

Get this code:
Code:
ps auxww | egrep [m]ember.cgi | awk '{print $2}' | while read PID; do kill -9 $PID; done;

to always be running in the background. I need the script to be allowed to run for at least 2 seconds before it would kill it, but i have no idea how to do that... Here is what I have so far and it does not work at all...

Code:
#!/bin/sh
#Kill_daemon.sh

i=0

while [$i -le 12]
do
ps auxww | egrep [m]ember.cgi | awk '{print $2}' | while read PID; do kill -9 $PID; done;
i++
sleep 5

done

however, when I try to execute it, I get this error:
: command not foundh: line 3:
: command not foundh: line 5:
Kill_daemon.sh: line 15: syntax error: unexpected end of file


I would appreciate any assistance you can provide, even if you can just point me in the correct direction. I am a novice in shell programming, I do not know much at all about it. I am a perl programmer and wrote a perl script to do it, however, when I keep it running, it holds the memory and cpu usage while sleeping, so the server load does not go down below .40 which if I don't have any of the scripts running wild and no perl script running to monitor it the server load gets down to like .10

Thank you much,
Richard
 

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kill.d(1m)							   USER COMMANDS							kill.d(1m)

NAME
kill.d - snoop process signals as they occur. Uses DTrace. SYNOPSIS
kill.d DESCRIPTION
kill.d is a simple DTrace program to print details of process signals as they are sent, such as the PID source and destination, signal num- ber and result. This program can be used to determine which process is sending signals to which other process. Since this uses DTrace, only users with root privileges can run this command. EXAMPLES
Default output, print process signals as they are sent. # kill.d FIELDS
FROM source PID COMMAND source command name TO destination PID SIG destination signal ("9" for a kill -9) RESULT result of signal (-1 is for failure) DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver- bose descriptions explaining the output. EXIT
kill.d will run forever until Ctrl-C is hit. AUTHOR
Brendan Gregg [Sydney, Australia] SEE ALSO
dtrace(1M), truss(1) version 0.90 May 14, 2005 kill.d(1m)
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