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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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FMT(1)							    BSD General Commands Manual 						    FMT(1)

NAME
fmt -- simple text formatter SYNOPSIS
fmt [-Cr] [goal [maximum]] [name ...] fmt [-Cr] [-g goal] [-m maximum] [name ...] DESCRIPTION
fmt is a simple text formatter which reads the concatenation of input files (or standard input if none are given) and produces on standard output a version of its input with lines as close to the goal length as possible without exceeding the maximum. The goal length defaults to 65 and the maximum to 75. The spacing at the beginning of the input lines is preserved in the output, as are blank lines and interword spac- ing. In non raw mode, lines that look like mail headers or begin with a period are not formatted. -C instructs fmt to center the text. -g goal New way to set the goal length. -m maximum New way to set the maximum length. -r Raw mode; formats all lines and does not make exceptions for lines that start with a period or look like mail headers. fmt is meant to format mail messages prior to sending, but may also be useful for other simple tasks. For instance, within visual mode of the ex(1) editor (e.g., vi(1)) the command !}fmt will reformat a paragraph, evening the lines. SEE ALSO
mail(1), nroff(1) HISTORY
The fmt command appeared in 3BSD. BUGS
The program was designed to be simple and fast - for more complex operations, the standard text processors are likely to be more appropriate. BSD
May 29, 2007 BSD
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