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Re: Perl and or Grep Help!

by oko1 (Deacon)
on Jan 17, 2011 at 23:45 UTC ( #882777=note: print w/ replies, xml ) Need Help??


in reply to Perl and or Grep Help!

Right, "grep" isn't going to work despite the '-r(ecursive)' switch because you've told it to only look for *.pl files in 'mydirectory/' - and no deeper than that. It's intended to either be used with '*' as the file argument, or a list of the directories that you want to look in. You're failing with "find" because you're not asking "grep" to '-l(ist)' the files it found - and possibly because you're failing to quote the metacharacters (*). Here are a couple of ways to make these work (non-Perl... I know, how horrible, right? :)

# Search all files, then filter out the ones that don't end in '.pl' grep -Hnr mail *|grep '^[^:]*\.pl:' > results.txt # Find all .pl files and list the ones that contain 'mail' find /start_dir -name '*.pl' -exec grep -l mail {} \; > results.txt # Find all .pl files and show all the lines matching 'mail' as well as + the file path find /start_dir -name '*.pl' -exec grep -n mail {} /dev/null \; > resu +lts.txt

The last one is an old Unix trick that's been around for a long time, but it still works quite well.

-- 
Education is not the filling of a pail, but the lighting of a fire.
 -- W. B. Yeats


Comment on Re: Perl and or Grep Help!
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Re^2: Perl and or Grep Help!
by Anonymous Monk on Jan 18, 2011 at 14:56 UTC
    Thanks, it worked very well. I could also specify on this one as an example exclusion of directories I don't want it to scan right?
    find /start_dir -name '*.pl' -exec grep -n mail {} /dev/null \; > res +u +lts.txt
Re^2: Perl and or Grep Help!
by Anonymous Monk on Jan 18, 2011 at 15:19 UTC
    I am trying this way, no success yet.
    find apps/ac/ -name '*.pl' -type d \( -name dirto_escape -o \) -prune +-o -print -exec grep -n sendmail {} /dev/null \; > apps/ac/grep/resu +lts.txt
Re^2: Perl and or Grep Help!
by Anonymous Monk on Jan 18, 2011 at 15:50 UTC
    find /start_dir -name '*.pl' -exec grep -n mail {} /dev/null \; > results.txt

    What is the purpose of the /dev/null? I seem to get the exact same results with and without it.

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