#!/usr/local/bin/perl

# Usage: rename [files]

##($op = shift) || die "Usage: rename perlexpr [filenames]\n";
$op = 'tr/A-Z/a-z/';

if (!@ARGV) {
    @ARGV = <STDIN>;
    chop(@ARGV);
}
for (@ARGV) {
    $was = $_;
    eval $op;
    die $@ if $@;
    rename($was,$_) unless $was eq $_;
}