in reply to Get Filename using perl

The Perl grep returns the matching contents from the file, not the file name, so your code should be more like:

opendir (DIR, "$responseDir") or die "could not open $responseDir :$!\ +n"; foreach $file ( readdir(DIR) ) { open THISFILE, "$responseDir/$file"; my @newFile = grep { /$commonField/ } <THISFILE>; if ( @newFile ) { # If there were any contents, this is our file. $matchedfile = $file; close THISFILE; last; } close THISFILE; } closedir(DIR); print "Matched file $matchedfile.\n";

I tested a slight variation of this. You'll definitely want to re-test this, but I think it works.