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9.2

How to limit a script or program execution time using bash or sh

Asked by flob9 in Linux Programming, Debian Linux, Bourne-Again Shell (bash)

Tags: linux bash cron script debian

Hello,

I have some scripts running on a debian server, called by various cronjobs, wich call php scripts.

Sometimes the php scripts are stucked for some hours, and I need to avoid it.

I already use the trap mechanism to avoid overlapping of the scripts, but in the cases of previous cron beeing stucked, nothing is working anymore.

I attach the code of the bash script. Cannot give you the php scripts, wich is very huge and access mysql database, lucene/solr engine, and files.

The ideal solution could be to stop the execution of the inner script/program if the time exceed the delay param.
I know I could kill the previous cron if i find the lockfile, but this seems bad practice.

Any help appreciated.
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#!/bin/bash
 
#param delay in minutes, can be 15,30,60,120,240 ... determines the duration and id of the script
# cron 15 can overlap cron 30, but not another cron 15
DELAY=$1
 
 
LOCKFILE=/tmp/cronfeed_${DELAY}.lock
 
[ -f $LOCKFILE ] && exit 0
 
trap "{ rm -f $LOCKFILE ; exit 255; }" EXIT SIGINT SIGTERM
 
touch $LOCKFILE
 
pushd /path/to/the/scripts > /dev/null
 
thescript 2>&1 >> /var/log/cronf${DELAY}.log
 
popd > /dev/null
 
exit 0
 
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[+][-]08/10/09 04:50 PM, ID: 25065171Accepted Solution

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Zones: Linux Programming, Debian Linux, Bourne-Again Shell (bash)
Tags: linux bash cron script debian
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Solution Provided By: Tintin
Participating Experts: 1
Solution Grade: A
 
[+][-]08/10/09 11:34 PM, ID: 25066580Author Comment

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[+][-]08/11/09 03:15 AM, ID: 25067470Author Comment

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