#!/bin/sh

PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin
HOME=/root
export HOME

# We need to source this so that the login screens get translated
[ -f /etc/profile.d/10lang.sh ] && . /etc/profile.d/10lang.sh

# trap SIGTERM to be able to kill autologin
killed () {
    kill -15 $!
    exit
}

trap killed 15

# Run preferred X display manager

# Try autologin first, if wanted...
if [ -f /etc/sysconfig/autologin -a -x /usr/sbin/autologin ]; then
        . /etc/sysconfig/autologin
        if [ -n "$USER" -a "$AUTOLOGIN" = yes ]; then
            /usr/sbin/autologin &
            echo -n $$ > /var/lock/subsys/dm
            wait $!
        fi
fi

# we have to assume that /etc/sysconfig/desktop has two variables, DESKTOP
# and DISPLAYMANAGER because administors may prefer a specific DM regardless
# of desktops.
# DISPLAYMANAGER is referenced by this script, and DESKTOP is referenced
# as system-wide default by /etc/X11/Xsession script only when X-session
# is opened by "startx" command. 
# when DMs open an X-session, they send DESKTOP, which is in this case
# directly selected by users, as a commandline argument of /etc/X11/Xsession.
# actually Xsession script is only able to know by existance of its first
# argument whether it is called by DM or "startx". see the logic
# in /etc/X11/Xsession.
# If DISPLAYMANAGER is not defined, then assume that it is the same as DESKTOP
preferred=
if [ -f /etc/sysconfig/desktop ]; then
        . /etc/sysconfig/desktop >/dev/null 2>&1
        [ -z "$DISPLAYMANAGER" ] && DISPLAYMANAGER=$DESKTOP
        if [ "$DISPLAYMANAGER" = "GDM" -o "$DISPLAYMANAGER" = "gdm" -o "$DISPLAYMANAGER" = "GNOME" -o "$DISPLAYMANAGER" = "gnome" -o "$DISPLAYMANAGER" = "Gnome" ]; then
            preferred=gdm
        elif [ "$DISPLAYMANAGER" = "KDE" -o "$DISPLAYMANAGER" = "kde" ]; then
            preferred=mdkkdm
        elif [ "$DISPLAYMANAGER" = "KDM" -o "$DISPLAYMANAGER" = "kdm" ]; then
            preferred=kdm
        elif [ "$DISPLAYMANAGER" = "XDM" -o "$DISPLAYMANAGER" = "xdm" ] ; then
            preferred=xdm
        fi
fi
# xdm-like program are launched from the console, however, the locale-setting
# can be done in a way that console is not localize, while X11 is.
# That is handled by the lang.sh script, depending on the existance of
# $DISPLAY or $DESKTOP variable. Now that $DESKTOP is defined resource lang.sh
[ -z "$DESKTOP" ] && DESKTOP=dummy_DESKTOP_variable
. /etc/profile.d/10lang.sh
[ "$DESKTOP" = "dummy_DESKTOP_variable" ] && unset DESKTOP


if [ -z "$preferred" ] || ! which $preferred >/dev/null 2>&1; then
  if which mdkkdm >/dev/null 2>&1; then
        preferred=mdkkdm
  elif which kdm >/dev/null 2>&1; then
        preferred=kdm
  elif which gdm >/dev/null 2>&1; then
        preferred=gdm
  elif which xdm >/dev/null 2>&1; then
        preferred=xdm
  fi
fi

if [ -n "$preferred" ]; then 
        `which $preferred` -nodaemon $* >/dev/null 2>&1 &
        echo -n $! > /var/lock/subsys/dm
fi

exit 0