#! /usr/bin/env perl
# "rectify-perms-perl-sitedirs" - does about what it's called.
# (C) 2003 Soren Andersen, All Rights Reserved. This software
# may be modified or redistributed under the same terms as Perl
# itself. Free Software. Absolutely no warrantee.

# Version 03.08.01

use strict;
use warnings;
use Config;
use File::Find ();
use Cwd ();
# Tell me the known group with access rights "+w" to the Perl site loc
+ation:
my $STAFF = 'staff';  # Adjust for your os.

# for the convenience of &wanted calls, including -eval statements:
use vars qw/*name *dir *prune/;
*name   = *File::Find::name;
*dir    = *File::Find::dir;
*prune  = *File::Find::prune;
my (%gid, %group);
my $cwd = Cwd::cwd();
while (my ($name, $pw, $gid) = getgrent) {
    $gid{$name} = $gid{$gid} = $gid;
}

my @Searchin;
for my $thistop ($Config::Config{sitearchexp} , $Config::Config{siteli
+bexp}) {
    push @Searchin , $thistop unless do {
      my $other = $thistop eq $Config::Config{sitelibexp} ?
                     $Config::Config{sitearchexp} : $Config::Config{si
+telibexp};
      $other =~/^$thistop\w+/;          };
}

# Traverse site(arch|lib)exp filesystems, fix perms when wrong.
File::Find::find({wanted => \&wanted}, @Searchin);
exit;

sub Can_Chgrp  {
    return 1;  # TODO
}

sub wanted {
    my ($dev,$ino,$mode,$nlink,$uid,$gid);

    unless (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) {
        die "Could not lstat() \"$_\", terminating!\n";
    }

    unless ($gid == $gid{$STAFF}) {
         &doexec(1, 'chgrp', '-c', $STAFF, '{}') if &Can_Chgrp();
    }

    if ( -d _ && ($gid == $gid{$STAFF}) &&
    ! (($mode & 0660) == 0660) )
    {
         &doexec(1, 'chmod','-c','ug+w','{}');
    }
}

sub doexec {
    my $ok = shift;
    my $confit;
    my @pargs = @_;
    for my $word (@pargs)
    {
        ($word =~s#{}#$name#g) &&
    ($confit = $word);
    }
    if ($ok) {
        my $old = select(STDOUT);
        $| = 1;
        print "Do this: " ,join(" ",@pargs), " ? ";
        select($old);
        return 0 unless <STDIN> =~ /^y/i;
    }
    chdir $cwd; #sigh
    system @pargs;
    chdir $File::Find::dir;
    return !$?;
}


__END__

On Debian GNU/Linux "woody", Perl release 5.6.1 has these build-time d
+irectory params:

archlib='/usr/lib/perl/5.6.1'
archlibexp='/usr/lib/perl/5.6.1'
privlib='/usr/share/perl/5.6.1'
privlibexp='/usr/share/perl/5.6.1'

bin='/usr/bin'
binexp='/usr/bin'
sitebin='/usr/local/bin'
sitebinexp='/usr/local/bin'

sitearch='/usr/local/lib/perl/5.6.1'
sitearchexp='/usr/local/lib/perl/5.6.1'
sitelib='/usr/local/share/perl/5.6.1'
sitelibexp='/usr/local/share/perl/5.6.1'

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