/etc/init.d/uml.uml0

init-uml.uml0 (text/plain), 3.14 KB, created by Jacob Joseph on 2004-10-17 17:45:26 UTC

# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# Written for Gentoo Linux by Jacob Joseph <[e-mail]>
# 2004/10/17
#
# User mode linux init script
# will source /etc/conf.d/$0
# portions taken from James Neal's <[e-mail]> umlazi

#!/sbin/runscript

depend() {
#	need net.bridge0
}

parse_machine() {
	if [ "${myservice%%.*}" = "uml" -a "${myservice##*.}" != "${myservice}" ]
	then
		MACHINE="${myservice##*.}"
	else	
		MACHINE=
	fi
}

die() {
	eerror $1
	eend 1
	exit 1
}

check_config() {
	[ -n "$UMLDIR" ] || die "UMLDIR is null"

	if [ -z "$MEMORY" ]; then
		ewarn "MEMORY is null.  32MB will be used"; \
		MEMORY="32MB"
	fi

	[ -n "$USER" ] || die "USER is null"
	[ -n "$NET" ] || die "NETWORK is null"

	[ -d "$UMLDIR/$MACHINE" ] || die "'$UMLDIR/$MACHINE does not exist or is not a directory"
	[ -f "$UMLDIR/$MACHINE/root.loop" ] || die "'$UMLDIR/$MACHINE/root.loop' not found"
	[ -f "$UMLDIR/$MACHINE/swap.loop" ] || die "'$UMLDIR/$MACHINE/swap.loop' not found"
	[ -f "$UMLDIR/$MACHINE/linux" ] || die "'$UMLDIR/$MACHINE/linux' not found"
}

# sends cad to UML.  Should have shutdown -h in /etc/inittab
send_cad() {
	#/usr/bin/uml_mconsole $CONSOLE cad >/dev/null 2>&1
	/usr/bin/uml_mconsole "$CONSOLE" cad >/dev/null 2>&1

	maxtime=60
	while [ $(is_running) != 0 ] && [ $maxtime -gt 0 ]; do
		sleep 1
		maxtime=$(( $maxtime - 1 ))
	done
}

send_halt() {
	# sync filesystems
	/usr/bin/uml_mconsole $CONSOLE sysrq s > /dev/null 2>&1
	sleep 5
	# remount read-only
	/usr/bin/uml_mconsole $CONSOLE sysrq u > /dev/null 2>&1
	sleep 5
	# sync again
	/usr/bin/uml_mconsole $CONSOLE sysrq s > /dev/null 2>&1
	sleep 5	
	# halt immediately
	/usr/bin/uml_mconsole $CONSOLE halt >/dev/null 2>&1
	sleep 5
}

get_pid() {
	if [ -e "$PIDFILE" ]; then
		cat $PIDFILE
	else
		echo 0
	fi
}

is_running() {
	local PID=$(get_pid)
	if /bin/ps -fp $PID > /dev/null 2>&1; then
		echo 1
	else
		echo 0
	fi
}

setup_env() {
	parse_machine
	check_config

	USERDIR=$(eval echo "~$USER")
	CONSOLE="$USERDIR/.uml/$MACHINE/mconsole"
	PIDFILE="$USERDIR/.uml/$MACHINE/pid"
}

start() {
	setup_env
	einfo "MEMORY: $MEMORY"
	

	ebegin "Starting UML: $MACHINE"


	[ $(is_running) != 0 ] && die "UML: $MACHINE already running"
		
	pushd $UMLDIR/$MACHINE >/dev/null 2>&1
	[ $? != 0 ] && die "pushd to $UMLDIR/$MACHINE failed"
	start-stop-daemon --start --pidfile $PIDFILE \
		--chuid "$USER" --startas \
		/usr/bin/screen -- -S $MACHINE -L -d -m \
             	./linux \
               	ubd0=root.loop \
               	ubd1=swap.loop \
               	umid=$MACHINE \
               	mem=$MEMORY \
               	eth0=tuntap,$NET \
		con=null con0=fd:0,fd:1
	eend $?
	popd > /dev/null 2>&1
}

status() {
	setup_env

	[ $(is_running) != 0 ]  && \
	einfo "UML: $MACHINE running as $(cat $PIDFILE)"
}

stop() {
	setup_env

	ebegin "Stopping UML: $MACHINE"

	einfo "Sending cad to shutdown...wait 60s"
	send_cad
	
	if [ $(is_running) != 0 ]; then
		eend 1
		ewarn "Forcing halt...wait 20s"
		send_halt
	else
		eend 0
	fi

	if [ $(is_running) != 0 ]; then
		eend 1
		eerror "Still running. I don't know what to do.  Aborting."
	else
		eend 0
	fi
}