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Full Discussion: Lock for this script
Top Forums Shell Programming and Scripting Lock for this script Post 302168521 by strunz on Monday 18th of February 2008 05:12:48 PM
Old 02-18-2008
Lock for this script

Hi,

My requirement is to service a process and below is the script which i wrote for that and works fine, I have kept it in a crontab and running this everyminute, how do I lock this if its already running and i dont want to open if its running and not completed yet.

The crontab need to run for the next minute after it completes running the older one.

#!/bin/ksh

while [ true ]; do

i=$(ps -ef | grep PROCESS_NAME |grep -v grep |wc -l)

if [ "$i" -lt 2 ]

then

echo "`date '+%Y-%m-%d-%H:%M:%S'` WARNING !!! PROCESS IS DOWN"

else

echo "`date '+%Y-%m-%d-%H:%M:%S'` PROCESS IS UP"

fi

done

Help me to keep a lock for this, I am using AIX 5.3
 

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script(1)							   User Commands							 script(1)

NAME
script - make record of a terminal session SYNOPSIS
script [-a] [filename] DESCRIPTION
The script utility makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the record is saved in the file typescript. See WARNINGS. The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends when the forked shell exits or when Control-d is typed. OPTIONS
The following option is supported: -a Appends the session record to filename, rather than overwriting it. NOTES
script places everything that appears on the screen in filename, including prompts. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) WARNINGS
script can pose a security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a privileged user, that is, root. Be sure that typescript is not a link before running script. SunOS 5.11 30 Jan 2004 script(1)
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