#!/bin/sh

PIDOF="/sbin/pidof"
GNOMESESSION="/usr/bin/gnome-session"
GNOMESESSIONSAVE="/usr/bin/gnome-session-save"
GNOMESESSIONSAVEARGS="--kill"
XMESSAGE=/usr/bin/X11/xmessage
POWEROFF="/sbin/poweroff"

XF86SERVER="/usr/bin/X11/X"
XF86XAUTHORITY="/var/gdm/:0.Xauth"

PS="/bin/ps"
PSUSERFIELD="1"
CAT="/bin/cat"
GREP="/bin/grep"
CUT="/bin/cut"
PASSWDFILE="/etc/passwd"
PASSWDFILEHOMEDIRFIELD="6"

GFXOK="no"
GNOMEOK="no"

if ( $PIDOF $XF86SERVER >/dev/null 2>&1 )
then
  export DISPLAY=":0"
  if [ -f $XF86XAUTHORITY ];
  then
    export XAUTHORITY=$XF86XAUTHORITY
  fi
  PIDOFGNOMESESSION="`$PIDOF $GNOMESESSION`"
  if [ $PIDOFGNOMESESSION != "" ];
  then
    if [ -f $PASSWDFILE ];
    then
      export SESSION_MANAGER="local/`hostname`:/tmp/.ICE-unix/$PIDOFGNOMESESSION"
      USER="`$PS hu $PIDOFGNOMESESSION | $CUT -d' ' -f$PSUSERFIELD`"
      export HOME="`$CAT $PASSWDFILE | $GREP ^$USER: | $CUT -d':' -f$PASSWDFILEHOMEDIRFIELD`"
      GNOMEOK="yes"
    fi
  fi
  GFXOK="yes"
fi

if [ $GFXOK = "yes" ];
then
  if [ $GNOMEOK = "yes" ];
  then
    exec $GNOMESESSIONSAVE $GNOMESESSIONSAVEARGS
  else
    $XMESSAGE -timeout 15 -center -buttons Cancel:0,Poweroff:2\
              -default Cancel "Poweroff the computer?" >/dev/null 2>&1
    if [ $? -eq 2 ];
    then
      exec $POWEROFF
    fi
  fi
else
  exec $POWEROFF
fi

#--