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Full Discussion: Check null value in xml
Top Forums Shell Programming and Scripting Check null value in xml Post 302775063 by Neethu on Monday 4th of March 2013 04:14:45 AM
Old 03-04-2013
Check null value in xml

Hi,

I have a log file which is having some xml tags. I need to check the value for a particular xml field is null or not and if it is null i have to add current time as the value for that xml field.

I tried below code to check whether the word count is 0. But even if the xml field is null it is showing the count as 1.

Code:
if [ `cat Log.out | grep "<timestamp1>.*</timestamp1>" | wc -l` -gt 0 ]
then
echo timestamp is not empty
fi

 

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SVK::Log::Filter::XML(3)				User Contributed Perl Documentation				  SVK::Log::Filter::XML(3)

NAME
SVK::Log::Filter::XML - display log messages in XML format SYNOPSIS
> svk log --xml <?xml version="1.0" encoding="utf-8"?> <log> <logentry revision="1234" original="456"> <author>author</author> <date>2006-05-16T15:43:28.889532Z</date> <msg>This is the commit message for the revision.</msg> </logentry> </log> > svk log --output xml ... DESCRIPTION
The XML filter is an output filter for displaying log messages in XML format. The organization of the XML format should be self- explanatory after a little experimentation. The format is designed to be compatible with Subversion's XML output, so you should be able to use tools like <http://ch.tudelft.nl/~arthur/svn2cl/> without any modification. However, since SVK supports arbitary log filters (see SVK::Log::Filter for details on writing one), it may be easier to write your own output format than to process the XML. This filter is invoked implicitly when you specify the "--xml" argument to SVK's log command. Two arguments to the log command modify XML's behavior. quiet Providing this command-line option to the log command prevents the XML filter from displaying the contents of the log message. All other information is displayed as usual. verbose Providing this command-line option to the log command makes the XML filter display history information for each revision. The history includes the kind of modification (modify, add, delete) and any copy history for each path that was modified in the revision. STASH
/PROPERTY MODIFICATIONS XML leaves all properties and the stash intact. perl v5.10.0 2008-08-04 SVK::Log::Filter::XML(3)
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