script for disk summary by file ownership

Posted on 2003-03-24
Medium Priority
Last Modified: 2010-03-05
Hi all.,
I am wishing if somebody can help me out with my problem.
I need to scan the file system table(/etc/mtab ot /etc/vfstab) and then recursively go thru each sbdirectory counting the number of blocks owned by users listed in /etc/passwd
So the final output would be like
<number_of_blocks> <user_name>
I know that we can use "du -ks" to get the number of blocks used but it doesnt give me user name.
An example output for clarifying would be

73686    root
4654     user1
3544     user2

Appreciate your support on this.
Question by:peepz
  • 3
LVL 85

Accepted Solution

ozo earned 380 total points
ID: 8195103
use File::Find;
open F,"</etc/mtab" or die "Can't open /etc/mtab $!";
while( <F> ){
    my $root = (split)[1];
    local %b=();
    print "$root\n";
        my ($uid, $blocks) = (lstat)[4,12];
        $b{$uid} += $blocks;
    for( sort{$b{$b}<=>$b{$a}} keys %b ){
       print $b{$_},"\t".getpwuid($_)."\n";

Author Comment

ID: 8195277
Thanks ozo for the prompt response.
Let me put this code to work and I'll get back shortly.

Author Comment

ID: 8195634
Thanks ozo for the prompt response.
Let me put this code to work and I'll get back shortly.

Author Comment

ID: 8195791
Thank you so much.Just works fine except that I need to suppress the errors for "Permission Denied" but I guess that should disappear if I run it as root.

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