Scours the /home filesystem, checks that each file in /home/$user is owned by $user, and generates a report based on security policy violations.

I wrote this for a security-cleanup project at work, but maybe someone else can find it useful as well.
#!/usr/local/bin/perl -w

use strict;

# Grab a list of directories in /home.
my (@users) = </home/*>;
foreach (@users) { $_ =~ s/\/home\/(.*)$/$1/; }

# Print a header.
print STDERR "\n Generating report (this may take a while)...\n\n";
printf " %-60s   %5s   %s\n", 'Offending file', 'UID', 'User owned by'
+;
print "-"x86 . "\n";

# Run through each directory (/home/$usr), checking that all files are
# owned by the correct owner ($usr).
foreach my $usr (@users) {
   my @files = </home/$usr/*>;
   foreach my $fil (@files) {
      if ((-d $fil) && !(-l $fil)) { push @files, <$fil/*>; }
      my $fuid = (stat($fil))[4];
      if ((defined $fuid) && (getpwnam($usr)) && ($fuid ne getpwnam($u
+sr))) {
         if (-l $fil) { last; }  # Skip symlinks.
         printf " %-60s  %6s   %s\n", $fil, $fuid, getpwuid($fuid);
      }
   }
}

print "\n";

# Perldoc.

=head1 NAME

B<hosr> - Homedir ownership security report

=head1 DESCRIPTION

B<hosr> scours the /home filesystem, checks that each file in
/home/$user is owned by $user, and generates a report based
on security policy violations.

=head1 AUTHOR/CVS

$Id: hosr,v 1.1 2003/01/27 21:42:22 schnesa Exp $

=cut

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In reply to Homedir ownership security by sschneid

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