The new init.d/xdm script

xdm.initd-4 (text/plain), 5.23 KB, created by Enrico Tagliavini on 2009-10-03 14:53:49 UTC

#!/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.initd-3,v 1.5 2009/09/24 17:07:56 williamh 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 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
	after bootmisc consolefont modules netmount
	after readahead-list ${NEED_SERV}
	before alsasound

	# Start before X
	use acpid consolekit hald xfs
}

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

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

	case "${MY_XDM}" in
		kdm|kde|kde2|kde3)
			EXE="$(which kdm)"
			# kdm takes too long to create a pidfile for baselayout-2
			#PIDFILE=/var/run/kdm.pid
			PIDFILE=
			;;
		kdm-*)
			EXE="/usr/kde/${MY_XDM#kdm-}/bin/kdm"
			PIDFILE=
			;;
		entrance*)
			EXE=/usr/sbin/entranced
			PIDFILE=/var/lib/entranced.pid
			;;
		gdm|gnome)
			EXE=/usr/bin/gdm
			[ "${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
			;;
		*)
			EXE=
			# Fix #65586, where MY_XDM is empty so EXE=somedir
			[ -x "/usr/bin/${MY_XDM}" ] && [ -f "/usr/bin/${MY_XDM}" ] \
				&& EXE="/usr/bin/${MY_XDM}"
			if [ -z "${EXE}" ] ; then
				EXE=/usr/bin/xdm
				PIDFILE=/var/run/xdm.pid
			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/init.d/.noxdm -o -f /tmp/.noxdm ] ; then
		einfo "Skipping ${EXE}, /etc/init.d/.noxdm or /tmp/.noxdm found"
		rm /etc/init.d/.noxdm /tmp/.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>/dev/null
				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 retval=0
	local curvt=
	if [ -t 0 ] ; then
		if type fgconsole >/dev/null 2>/dev/null ; 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="$(get_options "service")"
	local myname="$(get_options "name")"
	local mypidfile="$(get_options "pidfile")"
	local myservice=${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 "${curvt}" ] ; then
		if type chvt >/dev/null 2>/dev/null ; then
			chvt "${curvt}"
		else
			vidcontrol -s "$((${curvt} + 1))"	
		fi
	fi
	eend ${retval} "Error stopping ${myservice}"
	
	return ${retval}
}

# vim: set ts=4 :