#!/usr/bin/perl -w
use strict;
use File::stat;

my $verbose = 0;
my $nop = 0;

sub usage {
    print STDERR "Usage: $0 [-d days] dir ...\n";
    exit(1);
}

sub cleandir {
    my ($dir, $since, $level) = (@_);
    my $notremoved = 0;

    if ($verbose > 1) {
	print STDERR "$0:", " " x $level, " cleandir $dir $since {\n";
    }
    if (!opendir(DIR, $dir)) {
	printf STDERR "$0:", " " x $level, " cannot opendir $dir: $!";
	return;
    }
    for my $i (readdir(DIR)) {
	if ($i eq "." || $i eq "..") {next}
	if ($verbose > 2) {
	    print STDERR "$0:", " " x $level, " checking $dir/$i\n";
	}
	my $st = lstat("$dir/$i");
	if ($verbose > 3) {
	    print STDERR "$0:", " " x $level, " mtime=", $st->mtime, " atime=", $st->atime, "\n";
	}
	if (-d _) {
	    
	    if (cleandir("$dir/$i", $since, $level+1) == 0 && $st->mtime < $since) {
		if (rmdir("$dir/$i")) {next}
	    } 
	} elsif ($st->mtime < $since && $st->atime < $since) {
	    if ($nop) {
		print "would remove $dir/$i\n";
	    } else {
		if ($verbose > 0) {
		    print STDERR "$0:", " " x $level, " removing $dir/$i\n";
		}
		if (unlink("$dir/$i")) {next}
		print STDERR "$0:", " " x $level, " removing $dir/$i failed: $!/$i\n";
	    }
	    
	} 
	$notremoved++;
    }
    if ($verbose > 1) {
	print STDERR "$0:", " " x $level, " cleandir: $notremoved }\n";
    }
    return $notremoved;
}

sub main {
    my $since = time() - 14 * 86400;;
    my $i;
    while ($i = shift(@ARGV)) {
	if ($i eq "-d") {
	    my $days = shift(@ARGV);
	    $since = time() - $days * 86400;
	} elsif ($i eq "-v") {
	    $verbose++;
	} elsif ($i eq "-n") {
	    $nop++;
	} else {
	    cleandir($i, $since, 0);
	}
    }
    exit(0);
}

main();