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Full Discussion: Lightwight Process monitor
Top Forums Shell Programming and Scripting Lightwight Process monitor Post 10553 by LivinFree on Friday 16th of November 2001 06:18:19 AM
Old 11-16-2001
Lightwight Process monitor
We've been having some problems with a specific program in our nightly processing, so I whipped up a little script to run to monitor it, and send an e-mail when it's complete (failure or not). My primary problem is that I cannot modify the binary or the script that calls it, since the developers probably wouldn't be too happy about that. So it has to be stand-alone. My goal is a reliable script, fairly simple, and above all, very lightweight (I don't want to use any more cycles than are absolutely neccessary). Here's what I have running right now:
Code:
#!/usr/bin/sh
trap '' 1
bail_out () {
mail myself@mycompany <<!done
Subject: My_Job has finished
Importance: high
X-Priority: 1


My_Job has finished running.
If {program) reports that the process is still running, there
may be a problem. Go to \\\\path_to\samba_share and make sure that
the file is an appropriate size before continuing with the
{other_program} jobs.

Call somebody right away if there is a problem.
.
!done
exit 0
}
check_it () {
while :
do
ps -e | grep [M]y_Job >/dev/null 2>&1
case $? in
0) sleep 120 ;;
*) bail_out; exit 1 ;;
esac
done
}
check_it&

I want to be able to let other night operators run this during the weekend (that's why I wrote the instruction in the mail). Also, since none of them are very Unix literate (we only have a few Unix servers around - we're mostly NT), I wanted to make it simple to run. Just type name_of_script, and it'll background itself...

My question is: Can this be written to take even less resources?

Oh yeah, BTW, in case people are wondering:
This is a midrange HP-UX server in a key production environment...
 

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LEARN ABOUT LINUX

pollrcvd

POLLRCVD(8)						      System Manager's Manual						       POLLRCVD(8)

NAME

       pollrcvd - HylaFAX script for delivering facsimile received by polling

SYNOPSIS

       /var/spool/hylafax/bin/pollrcvd mailaddr faxfile devid commid error-msg

DESCRIPTION

       bin/pollrcvd  is the command script invoked by the HylaFAX server whenever a facsimile is received as a result of a polling operation.  The
       default script uses electronic mail to deliver the facsimile to the user that submitted the poll request, and can be controlled by  editing
       the etc/PollDispatch shell script in the spooling area that is sourced by pollrcvd when it runs.  The arguments are:

       mailaddr  the electronic mail address of the user that submitted the poll request.

       faxfile	 the pathname of the received TIFF file relative to the root of the spooling hierarchy.

       commid	 The communication identifier associated with the call (used to include a transcript when an error occurs).

       devid	 the modem device on which the document was received.

       error-msg an error message that is non-null if an error was encountered during the receive operation.

NOTES

       The default script delivers facsimile as PostScript wrapped in MIME.

FILES

       /var/spool/hylafax   spooling area
       /usr/sbin/faxinfo    for printing information about the facsimile
       /usr/bin/fax2ps	    for converting TIFF to PostScript
       /usr/lib/sendmail    for delivering mail

SEE ALSO

       faxq(8), hylafax-server(5), recvq(5)

								   May 12, 1996 						       POLLRCVD(8)
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