File: postfix-nochroot

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selinux-basics 0.3.5
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  • sloc: python: 279; sh: 190; perl: 43; makefile: 25
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#!/usr/bin/perl

# this script configures Postfix to not use chroot, restarts Postfix to apply
# the change, and removes the chroot files.  See the man page or the
# following blog post for more details:
# http://etbe.coker.com.au/2008/08/02/postfix-and-chroot/

use strict;

my $file = "/etc/postfix/master.cf";

if(-e "$file.bak")
{
  print "\"$file.bak\" already exists, aborting\n";
  exit(1);
}
open(MAIN, "<$file") or die "Can't open \"$file\"";
open(NEW, ">$file.new") or die "Can't open \"$file.new\"";

while(<MAIN>)
{
  if($_ =~ /^#/)
  {
    print NEW $_;
    next;
  }
  chomp;
  if($_ =~ /(^([^\s]+\s+){4})-(.*)$/)
  {
    print NEW "# modified to disable chroot\n";
    print NEW "$1n$3\n";
  }
  else
  {
    print NEW "$_\n";
  }
}
close(NEW);
close(MAIN);
rename("$file","$file.bak") or die "Can't rename \"$file\" to \"$file.bak\", aborting\n";
rename("$file.new", "$file") or die "Can't rename \"$file.new\" to \"$file\", inconsistent state\n";

my $script = "/etc/init.d/postfix";
open(STATUS,"$script status|") or die "Can't check postfix status\n";

my $status = <STATUS>;

if($status =~ /postfix is running/)
{
  system("$script stop");
}
system("rm -rf /var/spool/postfix/etc /var/spool/postfix/lib /var/spool/postfix/usr");
if($status =~ /postfix is running/)
{
  system("$script start");
}