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Full Discussion: grep'ing a file until a certain message appears
Top Forums Shell Programming and Scripting grep'ing a file until a certain message appears Post 302196732 by pallak7 on Monday 19th of May 2008 09:27:15 AM
Old 05-19-2008
grep'ing a file until a certain message appears
Hello,

I'm writing a script that will automate the launch of some services on my AIX machine. However, some services are dependent on the successful startup of others. When I start these services manually, I usually just check a log file until I see a message that confirms a successful startup. So, I figure I can integrate this into my script but I'm not sure what the best way to do it is. I was thinking something like this:
Code:
while [ `tail -f /path/to/log/file | grep "PATTERN"` -ne "0" ]; do
done

but that seems cumbersome for the system (not to mention the fact that I don't think it's working). What would be the best approach here? Thanks for your help.

By the way, I'm using the Korn shell.
 

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LEARN ABOUT DEBIAN

rgmanager

clusvcmgrd(8)						       Red Hat Cluster Suite						     clusvcmgrd(8)

NAME

       rgmanager - Resource Group (Cluster Service) Manager Daemon

DESCRIPTION

       rgmanager  handles  management  of  user-defined cluster services (also known as resource groups).  This includes handling of user requests
       including service start, service disable, service relocate, and service restart.  The service manager daemon also  handles  restarting  and
       relocating services in the event of failures.

HOW IT WORKS

       The  service  manager is spawned by an init script after the cluster infrastructure has been started and only functions when the cluster is
       quorate and locks are working.

       During initialization, the service manager runs scripts which ensure that all services are clear to be started.	After that, it	determines
       which services need to be started and starts them.

       When an event is received, members which are no longer online have their services taken away from them.	The event should only occur in the
       case that the member has been fenced whenever fencing is available.

       When a cluster member determines that it is no longer in the cluster quorum, the service manager stops all services and	waits  for  a  new
       quorum to form.

COMMAND LINE OPTIONS

       -f     Run in the foreground (do not fork).

       -d     Enable debug-level logging.

       -w     Disable internal process monitoring (for debugging).

       -N     Do  not perform stop-before-start.  Combined with the -Z flag to clusvcadm, this can be used to allow rgmanager to be upgraded with-
	      out stopping a given user service or set of services.

SEE ALSO

       clusvcadm(8)

								     Jan 2005							     clusvcmgrd(8)
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