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Shell Programming and Scripting
Script that checks for previous instances running
Post 302120796 by bd_joy on Friday 8th of June 2007 08:35:27 AM
06-08-2007
Script that checks for previous instances running
Hello,
I'm trying to write a script that checks for previous instances of the same script which may still be running (this script is scheduled to run every 30 minutes). I want to somehow use the pid from each instance to make sure the previous one isn't running before continuing with my processing, and wait for a set time period before checking again. I'd also like it to only retry a certain number of times before exiting with a failure notification.
I've never used a scripts pid before but one of my unix admins said that I can get the pid of the process by running a "echo $$" within the script.
Any suggestions to be appreciated. Right now I just have an e-mail notification at the end of my script with a date stamp so I can see (every 30 minutes thru the business day) that the script finished before the next one was scheduled to start - which is far from idea.
EDIT: I should note that this runs on AIX 5.3 and using ksh.
I'm trying to write a script that checks for previous instances of the same script which may still be running (this script is scheduled to run every 30 minutes). I want to somehow use the pid from each instance to make sure the previous one isn't running before continuing with my processing, and wait for a set time period before checking again. I'd also like it to only retry a certain number of times before exiting with a failure notification.
I've never used a scripts pid before but one of my unix admins said that I can get the pid of the process by running a "echo $$" within the script.
Any suggestions to be appreciated. Right now I just have an e-mail notification at the end of my script with a date stamp so I can see (every 30 minutes thru the business day) that the script finished before the next one was scheduled to start - which is far from idea.
EDIT: I should note that this runs on AIX 5.3 and using ksh.
Last edited by bd_joy; 06-08-2007 at 09:49 AM.. Reason: Additional Info
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LEARN ABOUT CENTOS
script-email
SCRIPT-EMAIL(8) System Administration Commands SCRIPT-EMAIL(8) NAME
script-email - Amanda script to send email notifications DESCRIPTION
script-email is an Amanda script implementing the Script API. It should not be run by users directly. It sends a notification email to the addresses specified in the MAILTO property. PROPERTIES
This section lists the properties that control script-email's functionality. See amanda-scripts(7) for information on the Script API, script configuration. MAILTO List of email addresses that will receive an email on command execution. It is a multi-valued property: property "MAILTO" "amanda@domain.com" "sysadmin@domain.com" "amandauser@domain.com" EXAMPLE
In this example, script-email is scheduled to be run before the DLE, on the server. The unqualified email address amanda will be passed to the email system unchanged. The script is then attached to a dumptype, which can then be specified for any DLEs which require notification. define script-tool pre-email { comment "email me before this DLE is backed up" plugin "script-email" execute-on pre-dle-backup execute-where server property "mailto" "amanda" } define dumptype user-tar-email { user-tar script "pre-email" } SEE ALSO
amanda(8), amanda.conf(5), amanda-client.conf(5), amanda-scripts(7) The Amanda Wiki: : http://wiki.zmanda.com/ AUTHORS
Jean-Louis Martineau <martineau@zmanda.com> Zmanda, Inc. (http://www.zmanda.com) Dustin J. Mitchell <dustin@zmanda.com> Zmanda, Inc. (http://www.zmanda.com) Amanda 3.3.3 01/10/2013 SCRIPT-EMAIL(8)