doc/bugs/ikiwiki-mass-rebuild_fails_to_drop_privileges_and_execute_ikiwiki.mdwn

   1 The ikiwiki-mass-rebuild utility fails to drop privileges and fails to execute ikiwiki on FreeBSD.
   2
   3 The solution is to set the effective UID after setting the real UID, and to set $PATH in the environment before calling exec().
   4
   5 Proposed patch:
   6
   7     --- ikiwiki-mass-rebuild.orig       2007-08-15 22:21:59.000000000 +0200
   8     +++ ikiwiki-mass-rebuild    2007-10-25 13:04:10.000000000 +0200
   9     @@ -22,13 +22,14 @@ sub processline {
  10                 my ($uuid, $ugid) = (getpwnam($user))[2, 3];
  11                 $)="$ugid $ugid";
  12                 $(=$ugid;
  13     -           $>=$uuid;
  14                 $<=$uuid;
  15     +           $>=$uuid;
  16                 if ($< != $uuid || $> != $uuid || $( != $ugid || $) ne "$ugid $ugid") {
  17                         die "failed to drop permissions to $user";
  18                 }
  19                 %ENV=();
  20                 $ENV{HOME}=(getpwnam($user))[7];
  21     +           $ENV{PATH}="/usr/bin:/usr/local/bin";
  22                 exec("ikiwiki", "-setup", $setup, @ARGV);
  23                 die "failed to run ikiwiki: $!";
  24         }