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diff --git a/and b/and
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+#!/usr/bin/perl
+
+=head1 NAME
+
+and - print lines that are present in one file and another
+
+=head1 SYNOPSIS
+
+and file
+
+and [file|-] [file|-] ...
+
+=head1 DESCRIPTION
+
+B<and> reads the specified files and prints out the lines that are common
+to all files, in the order they are listed in the last file. Use "-" to
+make it read a file from standard input. If only one file is specified,
+B<and> first reads standard input, and compares it with the specified file.
+
+=head1 AUTHOR
+
+Copyright 2006 by Joey Hess <joey@kitenet.net>
+
+Licensed under the GNU GPL.
+
+=cut
+
+use warnings;
+use strict;
+
+if (@ARGV == 0) {
+	die "usage: and [file|-] [file|-] ...\n";
+}
+
+if (@ARGV == 1) {
+	unshift @ARGV, "-";
+}
+
+my %seen;
+foreach my $fn (@ARGV) {
+	open (IN, $fn) || die "and: read $fn: $!\n";
+	while (<IN>) {
+		chomp;
+		$seen{$_}++;
+		if ($seen{$_} == @ARGV) {
+			print "$_\n";
+		}
+	}
+	close IN;
+}