#!/bin/bash
#
# Xsession:	Setup the xsession and start the xsession
#		script of the user for logon.
#		
# Copyright (c) 1998-2000 SuSE GmbH Nuernberg, Germany.
# Copyright (c) 2005 SUSE LINUX Products GmbH
# please report bugfixes or comments at http://www.suse.de/feedback.
#
# Author: Werner Fink <werner@suse.de>
#

#
# What we do if we are signaled or do not leave this
# script with an appropriate exec call.
#
failsafe="xterm -ls -T Failsafe -geometry 80x24+0+0"
trap "exec $failsafe" EXIT SIGHUP SIGINT SIGPIPE SIGTERM SIGIO

#
# Some bash (1 and 2) settings to avoid trouble on a
# failed program call.
#
set +e > /dev/null 2>&1
set +u > /dev/null 2>&1
set +o posix  > /dev/null 2>&1
if type shopt > /dev/null 2>&1 ; then
    shopt -s execfail
else
    no_exit_on_failed_exec=1
fi

#
# Some system defaults
#
    XETCDIR=/etc/X11
     XDMDIR=$XETCDIR/xdm
   XINITDIR=$XETCDIR/xinit
:  ${TMPDIR=/tmp}

export OPENWINHOME TMPDIR
test -n "$XAUTHORITY" || unset XAUTHORITY

#
# Save our arguments, maybe some of users call
# `set' in their profile files.
#
argv="$@"

#
# Handle the NoChange option of wdm 
#
/sbin/pidof -s wdm > /dev/null 2>&1
if test $? -eq 0 ; then
    if test -z "$argv" ; then
	if test -s $HOME/.wmrc ; then
    	    argv=$(<$HOME/.wmrc)	#use wm from previous session
	fi    
    else
	echo "$argv" > $HOME/.wmrc	#save wm
    fi
fi    

readonly argv

#
# Disable graphical login if normal login is disabled
#
login=false
while read sh ; do
    if test "$sh" = "$SHELL" ; then
	login=true
	break
    fi
done < /etc/shells

if test "$login" != "true" -o "$SHELL" = "/bin/false" ; then
    trap "exec xmessage -timeout 10 -button okay:1 -center	\
	\"${0##*/}: Login for $USER is disabled.\""		\
	EXIT SIGHUP SIGINT SIGPIPE SIGTERM SIGIO
    exit 1
fi
unset sh login

#
# Run the X session scripts with the login shell of
# the user. This function requires bash 2.0 or higher.
#
exec_login ()
{
    local shell=$SHELL
    case "$SHELL" in
    */csh|*/tcsh)		;;
    */sh|*/bash)		;;
    */bash2|*/bash1)		;;
    */pdksh|*/ksh)		;;
    */zsh|*/ash)		;;
    */rbash)	shell=/bin/bash ;;
    */rsh)	shell=/bin/sh	;;
    */rksh)	shell=/bin/ksh	;;
    */rzsh)	shell=/bin/zsh	;;
    *)		shell=/bin/bash	;;
    esac
    exec -l -a ${shell##*/} ${shell} -c ${1+"exec $@"}
}

#
# Redirect errors to the standard user log files.
#
for errfile in	"$HOME/.xsession-errors" \
		"$TMPDIR/xses-$USER"     \
		"/tmp/xses-$USER"
do
    # GDM seems to handle this its self
    test -z "$GDMSESSION" || break

    # Once if KDM does handle this its self
    #test -z "$KDMSESSION" || break

    # Avoid bad symbolic links
    case "$errfile" in
	/tmp/*|$TMPDIR/*)
	    if rm -f -- "$errfile" && errfile="$(mktemp -q "$errfile")" ; then
		exec > "$errfile" 2>&1
		break
	    fi
	    ;;
	*)
	    if test -e "$errfile"  || errfile="$(mktemp -q "$errfile")" ; then
		exec > "$errfile" 2>&1
		break
	    fi
	    ;;
    esac
done

#
# Check for X11R6 in execution path
#
case ":${PATH}:" in
    *:/usr/X11R6/bin:*) ;;
    *)  PATH="${PATH}:/usr/X11R6/bin"
esac

#
# Window manager provided later by KDM/GDM
# or read from the system settings
#
WINDOWMANAGER=""
export WINDOWMANAGER

#
# Handle arguments given by xdm/kdm/gdm.
#
forced=no
set -- $argv
if test $# -ge 1 ; then
    case "$1" in
    failsafe)	exec $failsafe   ;;
    default)	;;
    custom)	;;
    *)		forced=yes
		WINDOWMANAGER=$1 ;;
    esac
    if test $# -ge 2 -a -n "$2" ; then
	LANG=$2
	export LANG
    else
	# get the system default locale settings:
	if [ -z "$LANG" -a -f /etc/profile.d/lang.sh ] ; then
	    . /etc/profile.d/lang.sh
	fi
    fi
fi

# If LANG is still not set, get the system default locale settings:
#
if [ -z "$LANG" -a -f /etc/profile.d/lang.sh ] ; then
    . /etc/profile.d/lang.sh
fi

#
# No window manager? Get system default
#
if test "$forced" != "yes" ; then
    . /etc/profile.d/profile.sh
fi

#
# Source common code shared between the
# X session and X init scripts
#
. /etc/X11/xinit/xinitrc.common

#
# Some common user and system files
#
session=$HOME/.xsession
xinitrc=$HOME/.xinitrc
sysinit=$XINITDIR/xinitrc
syssess=$XDMDIR/sys.xsession

#
# Forced X session type if the user asked for
# an other session environment.
#
if test "$forced" = "yes" ; then
     unset WINDOW_MANAGER STARTUP
     test -x $syssess && exec_login "$syssess"
     exec_login "/bin/bash $syssess"
fi

# User login X session
# If the user doesn't have their own xsession, then run
# system xsession or xinitrc script if they exist

if   test -f $session ; then
     test -x $session && exec_login "$session"
     exec_login "/bin/bash $session"
elif test -f $xinitrc ; then
     test -x $xinitrc && exec_login "$xinitrc"
     exec_login "/bin/bash $xinitrc"
elif test -f $syssess; then
     test -x $syssess && exec_login "$syssess"
     exec_login "/bin/bash $syssess"
elif test -f $sysinit ; then
     test -x $sysinit && exec_login "$sysinit"
     exec_login "/bin/bash $sysinit"
elif test -n "$WINDOWMANAGER" ; then
     unset WINDOW_MANAGER STARTUP
     exec_login "$WINDOWMANAGER"
fi

#
# Call failsafe
#
exit 1