#!/usr/bin/perl
################################################################################
# LogoutHook
#
# Perform necessary user cleanup & system maintenance to prepare for next
# user login.
#
# 11/08/05, jf6b: Gutted and rebuilt for Tiger
# 12/06/05, jf6b: Changed call to reboot to shutdown
#

require "/etc/cmu/hooks/hook-subs";
get_opts();

################
# Create logfile
#
log_init("/etc/cmu/hooks/logs/LogoutHook.log", $WARNING);


#################
# Check Arguments
#
log_abort("Script invoked with bad number of arguments")
    if ($#ARGV != 0);

$user = $ARGV[0];
log_abort("Script invoked with a blank user-id argument")
    if ($user eq '');


##################
# Lookup User Info
#
($name,$passwd,$uid,$gid,
 $quota,$comment,$gcos,
 $homedir,$shell,$expire) = getpwnam($user)
    or log_abort("User '$user' not in passwd database");


################################################################################
# SWITCH FROM ROOT TO THE UID AND PRIMARY GID OF USER LOGGING IN
#
# This grants us access to the user's AFS space, 
# but limits what we can do to the local file system
#
switch_to_user($uid, $gid);


#################################
# Execute individual logout hooks
#
run_parts("logout");


##########################################
# Remove Classic & windowserver pref files
#
$ethaddr = `/sbin/ifconfig en0|grep ether|cut -d' ' -f 2`;
$ethaddr =~ s/[^0-9a-f]//g;
$hostname = `hostname`;

unlink($homedir.'/Library/Preferences/ByHost/com.apple.windowserver.'.$hostname.'.plist');
unlink($homedir.'/Library/Preferences/ByHost/com.apple.Classic.'.$hostname.'.plist');
unlink($homedir.'/Library/Preferences/ByHost/com.apple.windowserver.'.$ethaddr.'.plist');
unlink($homedir.'/Library/Preferences/ByHost/com.apple.Classic.'.$ethaddr.'.plist');


###################################
# Unlink Library to be sure nothing
# more gets written back to AFS
#
unlink($homedir.'/Library');


####################
# Destroy AFS tokens
#
run_command('unlog');


################################################################################
# SWITCH FROM THE UID AND PRIMARY GID OF USER LOGGED IN TO ROOT
#
switch_to_root();


########################
# Handle delayed reboots
#
if ( -f "/private/etc/cmu/ctrl/INeedAReboot") {
  unlink("/private/etc/cmu/ctrl/INeedAReboot");
# XXX - Hack to make AFS happy
  system("/Library/StartupItems/OpenAFS/OpenAFS stop");
  system("/sbin/shutdown -r now");
}


################
# Force a reboot
#
if ( -f "/private/etc/cmu/ctrl/RebootOnLogout") {
# XXX - Hack to make AFS happy
  system("/Library/StartupItems/OpenAFS/OpenAFS stop");
  system("/sbin/shutdown -r now");
}

log_close();

exit 0;