#!/sbin/openrc-run
# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License, v2

# 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
	# (#390609) gdm-3 will fail when dbus is not running
	# (#366753) starting keymaps after X causes problems
	after bootmisc consolefont modules netmount
	after readahead-list ypbind autofs openvpn gpm lircmd
	after quota keymaps
	before alsasound

	# Start before X
	use consolekit dbus 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 "${MY_XDM}" in
		kdm|kde)
			EXE=/usr/bin/kdm
			PIDFILE=/run/kdm.pid
			;;
		entrance*)
			EXE=/usr/sbin/entrance
			PIDFILE=/run/entrance.pid
			;;
		gdm|gnome)
			# gdm-3 and above has different paths
			if [ -f /usr/sbin/gdm ]; then
				EXE=/usr/sbin/gdm
				PIDFILE=/run/gdm/gdm.pid
				START_STOP_ARGS="--background"
				AUTOCLEAN_CGROUP="yes"
			else
				EXE=/usr/bin/gdm
				PIDFILE=/run/gdm.pid
			fi
			[ "${RC_UNAME}" != "Linux" ] && NAME=gdm-binary
			;;
		wdm)
			EXE=/usr/bin/wdm
			PIDFILE=
			;;
		gpe)
			EXE=/usr/bin/gpe-dm
			PIDFILE=/run/gpe-dm.pid
			;;
		lxdm)
			EXE=/usr/sbin/lxdm-binary
			PIDFILE=/run/lxdm.pid
			START_STOP_ARGS="--background"
			;;
		lightdm)
			EXE=/usr/sbin/lightdm
			PIDFILE=/run/lightdm.pid
			START_STOP_ARGS="--background"
			;;
		sddm)
			EXE="/usr/bin/sddm"
			START_STOP_ARGS="-m --background"
			PIDFILE=/run/sddm.pid
			;;
		*)
			# first find out if there is such executable
			EXE="$(command -v ${MY_XDM} 2>/dev/null)"
			PIDFILE="/run/${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=/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 AUTOCLEAN_CGROUP
	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" "${PIDFILE}"
	save_options "start_stop_args" "${START_STOP_ARGS}"
	save_options "autoclean_cgroup" "${AUTOCLEAN_CGROUP:-no}"

	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##*/}
	yesno "${rc_cgroup_cleanup:-no}" || rc_cgroup_cleanup=$(get_options "autoclean_cgroup")

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

	ebegin "Stopping ${myservice}"

	if start-stop-daemon --quiet --test --stop --exec "${myexe}" 2>/dev/null; then
		start-stop-daemon --stop --exec "${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 :