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I have a directory tree consisting of several thousand subdirectories, but I frequently need to grep only a small subset of those directories. How can I grep only those subdirectories matching a pattern?

For example, suppose I have these subdirectories which I want to grep in:

...
...
...
/foo
/fooLib
/fooHandler
/fooGizmo
...
...
...

The ... entries above represent the thousands of other directories I don't want to grep in.

Supposing I'm looking for all instances of bar, if I do this:

grep -n --recursive bar *

I would find what I'm looking for, but in all of the directories. How can I search in only those subdirectories matching the pattern foo*?

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Do you want to search only in /foo and friends? In /foo and /foo/bar and /foo/bar/qux and so on but not /wibble/foo? In /foo and /wibble/foo but not /foo/bar? In /foo and /foo/bar and /wibble/foo but not /elsewhere? –  Gilles Jan 15 '13 at 23:25
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2 Answers 2

up vote 2 down vote accepted

You can use grep and find combination as below :

find /{foo,fooLib,fooHandler,fooGizmo} -type f -exec grep -l "test" {} \;

Or you can use

find /foo* -type f -exec grep -l "test" {} \;

Or using grep only

grep -R "test" /foo*
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Can I do this without specifying the subdirectories explicityly? Rather, by using a wildcard such as foo*? –  John Dibling Jan 15 '13 at 15:48
    
@JohnDibling yes i have updated exactly what you are saying :) –  Rahul Patil Jan 15 '13 at 15:50
    
The latter suggestion (grep -R "test" /foo*) is exactly what I'm actually doing now, so I'll accept. –  John Dibling Jan 15 '13 at 15:54
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try grep foo* <other parts> eg: grep foo* -name "book*"

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If I'm looking for all instance of bar in all files in subdirectories named foo*, should this be like this: grep --recursive bar ./foo*/*? –  John Dibling Jan 15 '13 at 15:47
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