Ever found yourself staring at a deep filesystem and wondering which users own
files in it? This little snippet will grovel through it and display a list of
users, and the number of files that they own.
An alternative would be to count the bytes occupied by the files owned by a
given person. In this case you would want to accumulate (stat $_)[7]
instead. You might also then want to pretty print the bytes.
update: changed use of stat to lstat as per Merlyn's excellent suggestion. As it turns out, I was looking at a Samba share, and ordinary lusers can't create symlinks. Still, it's a good habit to get into.
#! /usr/bin/perl -w
use strict;
use File::Find;
my %owned;
find(
sub { ++$owned{(lstat $_)[4]} unless $_ eq '.' or $_ eq '..' },
shift || '.'
);
my %name;
$name{$_} = (getpwuid $_)[0] || "[uid $_]" foreach keys %owned;
print "$owned{$_}\t$name{$_}\n"
foreach sort{ $name{$a} cmp $name{$b} }
keys %owned;