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Top Forums Shell Programming and Scripting Run this grep every 10 minutes and do something based on the output Post 302929523 by kraljic on Monday 22nd of December 2014 10:59:42 AM
Old 12-22-2014
Run this grep every 10 minutes and do something based on the output

OS : Red Hat Linux 6.4
Shell : Bash

We have a file called status.txt which will have only 1 line. The content will be the string "Processing" for most of the day.

Code:
# cat status.txt
Processing
#

I want to write a shell script (notify.sh) which will be executing a grep every 10 minutes .

Once the script is executed , it should do the following


1. run a grep command every 10 minutes and check if the content of status.txt is anything other than "Processing" .

2. If the status.txt file has anything other than the string "Processing" (ie. grep -v "Processing" ) then it should echo "Completed". Actually in my real business scenario If the status.txt has anything other than "Processing" then a mail needs to be send out using Linux's mail command. But, for our testing purpose an echo "completed" should do .


3. Stop the execution of the notify.sh script (exit) after grep command managed to find anything other than the string "Processing" and printed "Complete" .

Note: I don't this to be invoked via a cronjob because in my real world scenario this logic has to be incorported as a subsection of a much bigger script. Smilie

Any idea how I can write this piece of code ?
 

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RHN-PROFILE-SYNC(8)						   Red Hat, Inc.					       RHN-PROFILE-SYNC(8)

NAME
rhn-profile-sync - Update system information on Red Hat Network. SYNOPSIS
rhn-profile-sync [options] DESCRIPTION
rhn-profile-sync is a client program that connects to Red Hat Network (or a Red Hat Network Satellite) and refreshes the data stored for this system. rhn-profile-sync updates data about installed packages, machine hardware, and virtual guest instances (if virtualization is enabled). OPTIONS
-v, --verbose Increase the debugging output. --proxy=PROXY Specify an http proxy to use. --proxyUser=PROXYUSER Specify a username to use for an authenticated proxy. This option must be used in conjunction with proxyPassword. --proxyPassword=PROXYPASSWORD Specify a password to use for an authenticated proxy. This option must be used in conjunction with proxyUser. --version Show the program's version number and exit. -h, --help Show a help message and exit. FILES
/etc/sysconfig/rhn/up2date The common configuration file used by RHN client programs. SEE ALSO
rhn_check(8), rhn_register(8), rhnreg_ks(8), rhnsd(8), up2date(5). AUTHORS
See the AUTHORS file included with this software. This manual page was written by James Bowes <jbowes@redhat.com> BUGS
Report bugs to <http://bugzilla.redhat.com>. COPYRIGHT
Copyright (C) 1999-2010 Red Hat, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. Linux 2010 August 30 RHN-PROFILE-SYNC(8)
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