#!/usr/bin/perl
use strict;
use DB_File;
my $base = '/some/dir'; # dir to check
my $data = '/some/file.db'; # file name cache
my $sleep = 100; # how long to sleep for
my $maxtime = 86400; # max time before key removal
while (1) {
#
# we need to tie and untie each time just to be safe due
# to file caching and flushing, which sometimes doesnt
# happen untill the file has been untied.
# If another monk can help here that would be nice.
#
tie(my %files, 'DB_File', $data, O_RDWR, 0644)
or die "Cant tie $data: $!\n";
opendir(BASE, $base) or die "Cant open dir $base: $!\n";
for ( grep(!/^\./, readdir BASE) ) { # avoid . and .. :)
if ( $files{$_} ) {
$files{$_} = time();
} else {
do_something();
$files{$_} = time();
}
}
closedir(BASE);
for ( keys %files ) {
# remove the file if it hasnt been around for a week
delete($files{$_}) if ($files{$_} >= $maxtime);
}
untie(%files);
sleep $sleep;
}
use perl;