*Why* does using /dev/null in find/grep display the file name?
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by Jonathan
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Published on 2010-05-13T12:38:58Z
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2010/05/13
12:44 UTC
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find . -name "*.java" -exec grep "foo" {} \;
This just prints matches, no file name.
find . -name "*.java" -exec grep "foo" /dev/null {} \;
But this prints file name as well.
Why? What are the mechanics of find/grep that cause file name to print when /dev/null is inserted into the mix?
PS - yes, I know I can do "grep -H"
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