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Jul 6th, 2009

modifying xml files using sed

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Hello,

I have lots of xml files in the same format and I need to modify a xml tag in these files.
i loop over the files and apply sed to the files to make the modification but CPU goes to %100 while doing this. I think I'm doing something wrong. Here is my onliner:

Quote ...

for f in $( find . -name "*.xml" ); do sed -n "s/<idle>600<\/idle>/<idle>900<\/idle>/p" $f >> $f; echo "file:" $f;done

by the way, I use Linux sed, not Unix sed.(I'm not sure if differs)

thanks in advance...

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xyzt

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Jul 6th, 2009

Re: modifying xml files using sed

Do you really want to copy the modified line to the end of the original file so that the same tag exists twice with differing values?

Also, you can avoid having to escape the "/" by using a different separator

Shell Scripting Syntax (Toggle Plain Text)

sed -n 's;<idle>600</idle>;<idle>900</idle>;p'

Also, unless you are using variabls in the sed statement then you are better off using single quotes instead of double quotes.

Last edited by masijade; Jul 6th, 2009 at 12:36 pm.

masijade

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Jul 6th, 2009

Re: modifying xml files using sed

Your problem is here

Shell Scripting Syntax (Toggle Plain Text)
sed -n "s/<idle>600<\/idle>/<idle>900<\/idle>/p" $f >> $f
sed -n "s/<idle>600<\/idle>/<idle>900<\/idle>/p" $f >> $f

You need to use either the -i option to GNU sed to permit in place editing or save the output to a temporary file and then cp that temporary file to $f.

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