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Full Discussion: Check null value in xml
Top Forums Shell Programming and Scripting Check null value in xml Post 302775201 by Yoda on Monday 4th of March 2013 09:38:18 AM
Old 03-04-2013
I noticed that in your code you are checking if your file size is empty, but if that is what you want, it is OK.

But if you are looking for a method to check if tag value is empty and insert current timestamp in it, then code something like:
Code:
awk -F'[<>]' ' BEGIN {
                cmd = "date +%Y%m%d%H%M%S"
} /<timestamp1>/ {
        if ( $3 == "" )
        {
                cmd | getline dt
                close(cmd)
                $0 = "<timestamp1>" dt "</timestamp1>"
        }
} 1 ' xml

 

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LEARN ABOUT DEBIAN

crm_diff

PACEMAKER(8)						  System Administration Utilities					      PACEMAKER(8)

NAME

       Pacemaker - Part of the Pacemaker cluster resource manager

SYNOPSIS

       crm_diff original_xml operation [options]

DESCRIPTION

       crm_diff - A utility for comparing Pacemaker configurations (XML format)

       The tool produces a custom (diff-like) output which it can also apply like a patch

OPTIONS

       -?, --help
	      This text

       -$, --version
	      Version information

       -V, --verbose
	      Increase debug output

   Original XML:
       -o, --original=value
	      XML is contained in the named file

       -O, --original-string=value
	      XML is contained in the supplied string

   Operation:
       -n, --new=value
	      Compare the original XML to the contents of the named file

       -N, --new-string=value
	      Compare the original XML to the contents of the supplied string

       -p, --patch=value
	      Patch the original XML with the contents of the named file

   Additional Options:
       -c, --cib
	      Compare/patch the inputs as a CIB (includes versions details)

       -f, --filter
	      Suppress irrelevant differences between the two inputs

EXAMPLES

       Obtain the two different configuration files by running cibadmin on the two cluster setups to compare:

	      # cibadmin --query > cib-old.xml

	      # cibadmin --query > cib-new.xml

       Calculate and save the difference between the two files:

	      # crm_diff --original cib-old.xml --new cib-new.xml > patch.xml

       Apply the patch to the original file:

	      # crm_diff --original cib-old.xml --patch patch.xml > updated.xml

       Apply the patch to the running cluster:

	      # cibadmin --patch patch.xml

AUTHOR

       Written by Andrew Beekhof

REPORTING BUGS

       Report bugs to pacemaker@oss.clusterlabs.org

Pacemaker 1.1.7 						    April 2012							      PACEMAKER(8)
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