Let perl do the dirty work and use the implicit loop options -n ( see perlrun ).
Check out Tim Mahers Minimal Perl if you are a unixy person and want perl scripts to work similar to unix tools.
/usr/bin/perl -n
BEGIN{
@ARGV=qw(the files you want to process);
}
push @files, $ARGV and close ARGV if /^pattern/;
END{
print "matching files @files\n"
}
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