#!/sbin/runscript
# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License, v2
# $Header: /var/cvsroot/gentoo-x86/x11-apps/xinit/files/xdm.start,v 1.4 2006/04/21 23:40:14 spyderous Exp $

# This is here to serve as a note to myself, and future developers.
#
# Any Display manager (gdm,kdm,xdm) has the following problem:  if
# it is started before any getty, and no vt is specified, it will
# usually run on vt2.  When the getty on vt2 then starts, and the
# DM is already started, the getty will take control of the keyboard,
# leaving us with a "dead" keyboard.
#
# Resolution: add the following line to /etc/inittab
#
#  x:a:once:/etc/X11/startDM.sh
#
# and have /etc/X11/startDM.sh start the DM in daemon mode if
# a lock is present (with the info of what DM should be started),
# else just fall through.
#
# How this basically works, is the "a" runlevel is a additional
# runlevel that you can use to fork processes with init, but the
# runlevel never gets changed to this runlevel.  Along with the "a"
# runlevel, the "once" key word means that startDM.sh will only be
# run when we specify it to run, thus eliminating respawning
# startDM.sh when "xdm" is not added to the default runlevel, as was
# done previously.
#
# This script then just calls "telinit a", and init will run
# /etc/X11/startDM.sh after the current runlevel completes (this
# script should only be added to the actual runlevel the user is
# using).
#
# Martin Schlemmer
# aka Azarah
# 04 March 2002


# Start X Font Server before X
depend() {
	need localmount

	# this should start as early as possible
	# we can't do 'before *' as that breaks it
	after bootmisc readahead-list
	before alsasound net.lo

	# Start before X
	use acpid hald xfs
}

setup_dm() {
	source /etc/profile.env
	export PATH="/bin:/sbin:/usr/bin:/usr/sbin:${ROOTPATH}"

	local MY_XDM="$(echo ${DISPLAYMANAGER} | awk '{ print tolower($1) }')"
	case "${MY_XDM}" in
		kdm|kde|kde2|kde3)
			EXE="$(which kdm)"
			;;
		entrance*)
			EXE="$(which entranced)"
			;;
		gdm|gnome)
			EXE=/usr/bin/gdm
			;;
		wdm)
			EXE=/usr/bin/wdm
			;;
		*)
			EXE=
			# Fix #65586, where MY_XDM is empty so EXE=somedir
			[ -x "/usr/bin/${MY_XDM}" -a -f "/usr/bin/${MY_XDM}" ] \
				&& EXE="/usr/bin/${MY_XDM}"
			[ -z "${EXE}" ] && EXE="/usr/bin/xdm"
			;;
	esac

	test ! -x "${EXE}" && EXE=/usr/bin/xdm

	SERVICE="${EXE##*/}"
}

choose_layout() {

#some personnal stuff to switch between nv and nvidia drivers and glx
local btpopt
if [ -e /etc/forceX ]
  then 
    source /etc/forceX
    if [ $nvdriver == nv ]
      then 
        cp /etc/X11/xorg.conf.riva /etc/X11/xorg.conf && [[ `eselect opengl show` = "nvidia" ]] &&  eselect opengl set xorg-x11
      else
        cp /etc/X11/xorg.conf.nv /etc/X11/xorg.conf && [[ `eselect opengl show` != "nvidia" ]] &&  eselect opengl set nvidia
    fi
    case "$nvlayout" in
      "TwinTV"|"CloneTV"|"Twin"|"Clone"|"Ext")
      
      ;;
      *)
        nvlayout="Mono"
      ;;
    esac
  else
    nvlayout="Mono"
    if [[ `grep nonvidia /proc/cmdline` != "" ]]
      then
        cp /etc/X11/xorg.conf.riva /etc/X11/xorg.conf && [[ `eselect opengl show` = "nvidia" ]] &&  eselect opengl set xorg-x11
      else 
        if [[ `modprobe nvidia  && echo "0" ` ]]
          then 
            cp /etc/X11/xorg.conf.nv /etc/X11/xorg.conf && [[ `eselect opengl show` != "nvidia" ]] &&  eselect opengl set nvidia
            for btpopt  in $(< /proc/cmdline)
            do
              case "${btpopt%=*}" in
                "nvlayout")
                  case "${btpopt##*=}" in
                    "TwinTV"|"CloneTV"|"Twin"|"Clone"|"Ext")
                       nvlayout="${btpopt##*=}"
                  ;;
                  esac
                ;;
              esac
            done
          else cp /etc/X11/xorg.conf.riva /etc/X11/xorg.conf && [[ `eselect opengl show` = "nvidia" ]] &&  eselect opengl set xorg-x11
        fi
    fi
fi

      

#Select the desired layout according to bootparams

#for kde 3.3
#echo ":0 local@tty1 /usr/X11R6/bin/X -nolisten tcp -layout $nvlayout" > /usr/kde/3.3/share/config/kdm/Xservers

#for kde 3.4
#sed -e "/^ServerArgsLocal=/s/-layout [a-Z]*/-layout $nvlayout/" /usr/kde/3.4/share/config/kdm/kdmrc.bak > /usr/kde/3.4/share/config/kdm/kdmrc

#for gdm
sed -e "/^command=\/usr\/bin\/X/s/-layout [A-z]*/-layout $nvlayout/" /etc/X11/gdm/gdm.conf > /tmp/gdm.conf && mv -f /tmp/gdm.conf /etc/X11/gdm/gdm.conf


if [[ `grep noXgl /proc/cmdline` != "" ]]
then
    sed -ie "/^0=/s/0=Xgl/0=Standard/" /etc/X11/gdm/gdm.conf
    ln -sf /etc/X11/dm/Sessions/xfce-nonXgl.desktop /etc/X11/dm/Sessions/xfce.desktop
    ln -sf /etc/xdg/xfce4-session/xfce4-session-nonXgl.rc /etc/xdg/xfce4-session/xfce4-session.rc
else
    sed -ie "/^0=/s/0=Standard/0=Xgl/" /etc/X11/gdm/gdm.conf
    ln -sf /etc/X11/dm/Sessions/xfce-Xgl.desktop /etc/X11/dm/Sessions/xfce.desktop
    ln -sf /etc/xdg/xfce4-session/xfce4-session-Xgl.rc /etc/xdg/xfce4-session/xfce4-session.rc
fi

}

cmdline_opt() {
	if [[ "$#" -ne 1 ]]; then
		return 1
	fi

	for opt in $(</proc/cmdline); do
		case ${opt} in
			${1}) eval ${1}="true" ;;
		esac
	done
}

nox() {
	# Don't start X if we were passed 'nox' at boot (#83680)
	cmdline_opt nox

	if [[ -e /etc/forceX ]]; then 
		return 1
	fi

	if [[ "$?" -ne 0 ]]; then
		return 1
	fi

	if [[ -n "${nox}" ]]; then
		return 0
	else
		return 1
	fi
}

start() {
	setup_dm
	
	if nox; then
		einfo "Skipping ${EXE}, received 'nox'"
	else
		ebegin "Setting up ${SERVICE}"
		choose_layout
		#save the prefered DM
		save_options "service" "${EXE}"

		# Start as soon as possible if XSTATICVT is set
		if [ "${XSTATICVT}" = "yes" ] ; then
			/etc/X11/startDM.sh
		else
			#tell init to run /etc/X11/startDM.sh after current
			#runlevel is finished (should *not* be in the "boot"
			#                      runlevel).
			/sbin/telinit a &>/dev/null
		fi
		eend 0
	fi

}

stop() {
	local retval=0
	local curvt="$(fgconsole)"
	local myexe="$(get_options "service")"
	local myservice="${myexe##*/}"
	
	ebegin "Stopping ${myservice}"
	rm -f ${svcdir}/options/xdm/service
	
	if [ "$(ps -A | grep -e "${myservice}")" ]
	then
		start-stop-daemon --stop --quiet \
			--exec ${myexe} &>/dev/null
		
		retval=$?
	fi
	
	#switch back to original vt
	chvt "${curvt}" &>/dev/null
	eend ${retval} "Error stopping ${myservice}."
	
	return ${retval}
}


# vim:ts=4