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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 FREEBSD

monitor

monitor(1)							  monitor command							monitor(1)

NAME

       monitor - receive logging information from LPD

SYNOPSIS

       monitor [ -u ] [ -t ] [ port ]

DESCRIPTION

       The  monitor  program is a template for a printer status monitoring program.  It will open the specified TCP and/or UDP port, and then wait
       for accounting or other information to be sent.	It prints this information on it standard output.

OPTIONS

       -u   wait for connections on the UDP port.

       -t   wait for connections on the TCP port.

       port Use the specified port number.

EXIT STATUS

       The following exit values are returned:

       zero (0)       Successful completion.

       non-zero (!=0) An error occurred.

SEE ALSO

       lpd.conf(5), lpc(8), lpd(8), checkpc(8), lpr(1), lpq(1), lprm(1), printcap(5), lpd.conf(5), pr(1), lprng_certs(1), lprng_index_certs(1).

AUTHOR

       Patrick Powell <papowell@lprng.com>.

HISTORY

       LPRng is a enhanced printer spooler system with functionality similar to the Berkeley LPR software.  The LPRng developer  mailing  list	is
       lprng-devel@lists.sourceforge.net; subscribe by visiting https://lists.sourceforge.net/lists/listinfo/lprng-devel or sending mail to lprng-
       request@lists.sourceforge.net with the word subscribe in the body.
       The software is available via http://lprng.sourceforge.net

LPRng								    2006-12-09								monitor(1)
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