#!/sbin/runscript
# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License, v2
# $Header: /var/cvsroot/gentoo-x86/x11-base/xorg-server/files/xdm.initd-3,v 1.1 2010/09/28 12:43:19 scarabeus 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

depend() {
 need localmount xdm-setup

 # this should start as early as possible
 # we can't do 'before *' as that breaks it
 # (#139824) Start after ypbind and autofs for network authentication
 # (#145219 #180163) Could use lirc mouse as input device
 # (#70689 comment #92) Start after consolefont to avoid display corruption
 # (#291269) Start after quota, since some dm need readable home
 after bootmisc consolefont modules netmount
 after readahead-list ypbind autofs openvpn gpm lircmd
 after quota
 before alsasound

 # Start before X
 use consolekit xfs
}

setup_dm() {
 local MY_XDM
 
 MY_XDM=$(echo "${DISPLAYMANAGER}" | tr '[:upper:]' '[:lower:]')

 # Load our root path from profile.env
 # Needed for kdm
 PATH=${PATH}:$(. /etc/profile.env; echo "${ROOTPATH}")

 NAME=
 case "${MY_XDM}" in
  kdm|kde)
   EXE="$(which kdm)"
   PIDFILE=/var/run/kdm.pid
   ;;
  kdm-*)
   EXE="/usr/kde/${MY_XDM#kdm-}/bin/kdm"
   PIDFILE=/var/run/kdm.pid
   ;;
  entrance*)
   EXE=/usr/sbin/entranced
   PIDFILE=/var/lib/entranced.pid
   ;;
  gdm|gnome)
   EXE=/usr/bin/gdm
   [ "${RC_UNAME}" != "Linux" ] && NAME=gdm-binary
   PIDFILE=/var/run/gdm.pid
   ;;
  wdm)
   EXE=/usr/bin/wdm
   PIDFILE=
   ;;
  gpe)
   EXE=/usr/bin/gpe-dm
   PIDFILE=/var/run/gpe-dm.pid
   ;;
  *)
   # first find out if there is such executable
   EXE="$(which ${MY_XDM} 2>/dev/null)"
   PIDFILE="/var/run/${MY_XDM}.pid"

   # warn user that he is doing sick things if the exe was not found
   if [ -z "${EXE}" ]; then
    echo "ERROR: Your XDM value is invalid."
    echo "  No ${MY_XDM} executable could be found on your system."
   fi
   ;;
 esac

 if ! [ -x "${EXE}" ]; then
  EXE=/usr/bin/xdm
  PIDFILE=/var/run/xdm.pid
  if ! [ -x "/usr/bin/xdm" ]; then
   echo "ERROR: Please set your DISPLAYMANAGER variable in /etc/conf.d/xdm,"
   echo " or install x11-apps/xdm package"
   eend 255
  fi
 fi
}

# Check to see if something is defined on our VT
vtstatic() {
 if [ -e /etc/inittab ] ; then
  grep -Eq "^[^#]+.*<tty$1>" /etc/inittab
 elif [ -e /etc/ttys ] ; then
  grep -q "^ttyv$(($1 - 1))" /etc/ttys
 else
  return 1
 fi
}

start() {
 local EXE NAME PIDFILE
 setup_dm

 if [ -f /etc/.noxdm ]; then
  einfo "Skipping ${EXE##*/}, /etc/.noxdm found or "nox" bootparam passed."
  rm /etc/.noxdm
  return 0
 fi

 ebegin "Setting up ${EXE##*/}"

 # save the prefered DM
 save_options "service" "${EXE}"
 save_options "name"    "${NAME}"
 save_options "pidfile" "${PIDFILE}"

 if [ -n "${CHECKVT-y}" ] ; then
  if vtstatic "${CHECKVT:-7}" ; then
   if [ -x /sbin/telinit ] && [ "${SOFTLEVEL}" != "BOOT" ] && [ "${RC_SOFTLEVEL}" != "BOOT" ]; then
    ewarn "Something is already defined on VT ${CHECKVT:-7}, will start X later"
    telinit a >/dev/null 2>&1
    return 0
   else
    eerror "Something is already defined on VT ${CHECKVT:-7}, not starting"
    return 1
   fi
  fi
 fi

 /etc/X11/startDM.sh
 eend 0
}

stop() {
 local curvt retval

 retval=0
 if [ -t 0 ]; then
  if type fgconsole >/dev/null 2>&1; then
   curvt=$(fgconsole 2>/dev/null)
  else
   curvt=$(tty)
   case "${curvt}" in
    /dev/ttyv[0-9]*) curvt=${curvt#/dev/ttyv} ;;
    *) curvt= ;;
   esac
  fi
 fi
 local myexe myname mypidfile myservice
 myexe=$(get_options "service")
 myname=$(get_options "name")
 mypidfile=$(get_options "pidfile")
 myservice=${myexe##*/}

 [ -z "${myexe}" ] && return 0

 ebegin "Stopping ${myservice}"

 if start-stop-daemon --quiet --test --stop --exec "${myexe}"; then
  start-stop-daemon --stop --exec "${myexe}" --retry TERM/5/TERM/5 
   ${mypidfile:+--pidfile} ${mypidfile} 
   ${myname:+--name} ${myname}
  retval=${?}
 fi

 # switch back to original vt
 if [ -n "${curvt}" ]; then
  if type chvt >/dev/null 2>&1; then
   chvt "${curvt}"
  else
   vidcontrol -s "$((curvt + 1))"
  fi
 fi

 eend ${retval} "Error stopping ${myservice}"
 return ${retval}
}

# vim: set ts=4 :