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Re: Write a file if grep finds a pattern?

by mjscott2702 (Pilgrim)
on Nov 19, 2010 at 09:37 UTC ( #872455=note: print w/replies, xml ) Need Help??

in reply to Write a file if grep finds a pattern?

You could try something like this:

use strict; use warnings; open (my $in,"<", "/tmp/logbook.log") or die "can not open datei: $!"; my @errors = grep /error/i, <$in>; my $file = '/tmp/ok.txt'; open my $out, ">", $file or die "Kann Datei $file nicht zum Schreiben +oeffnen: $!\n"; if (@errors) { print $out @errors; } else { print $out "OK!\n"; } close($in); close($out);

If the logbook.log file has something like this:
line1 has an error
line2 does not
ERROR on line 3
the following output is in the ok.txt file:

line1 has an error
ERROR on line 3

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