path: root/sbin/rc

#!/sbin/runscript
# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

trap ":" INT QUIT TSTP
source /sbin/functions.sh
umask 022

# void get_critical_services()
#
#  Get critical services needed for bootup, and exports CRITICAL_SERVICES
#
get_critical_services() {
	local x=
	CRITICAL_SERVICES=
	
	if [[ -f "/etc/runlevels/${BOOTLEVEL}/.critical" ]] ; then
		for x in $(< "/etc/runlevels/${BOOTLEVEL}/.critical") ; do
			CRITICAL_SERVICES="${CRITICAL_SERVICES} ${x##*/}"
		done
	else
		CRITICAL_SERVICES="hostname"
	fi

	export CRITICAL_SERVICES

	return 0
}

# void check_critical_services()
#
#     Ensure that critical services are in the boot runlevel
#
check_critical_services() {
	local x

	for x in ${CRITICAL_SERVICES} ; do
		if [[ ! -L "/etc/runlevels/${BOOTLEVEL}/${x}" ]] ; then
			ewarn "WARNING:  Adding critical service ${x} to the ${BOOTLEVEL} runlevel"
			ln -snf "/etc/init.d/${x}" "/etc/runlevels/${BOOTLEVEL}/${x}"
		fi
	done
}

# Save $1
argv1=$1

# First time boot stuff goes here.  Note that 'sysinit' is an internal runlevel
# used to bring up local filesystems, and should not be started with /sbin/rc
# directly ...
if [[ ${argv1} = "sysinit" ]]
then
	source "${svclib}"/sh/init.sh || {
		echo "Could not source init.sh !?"
		exit 1
	}
	
	exit 0
fi # Sysinit ends here

if [[ ${argv1} == "boot" ]]
then
	setup_defaultlevels

	# $BOOT can be used by rc-scripts to test if it is the first time
	# the 'boot' runlevel is executed
	export BOOT="yes"

	# We reset argv1 to the bootlevel given on the kernel command line
	# if there is one
	argv1="${BOOTLEVEL}"
fi

# Ensure all critical services have are in the boot runlevel
get_critical_services
check_critical_services
source "${svclib}/sh/rc-services.sh"

if [[ -f "${svcdir}/softlevel" ]] ; then
	# Set OLDSOFTLEVEL if we had a valid SOFTLEVEL
	export OLDSOFTLEVEL="$(< "${svcdir}/softlevel")"
else
	export OLDSOFTLEVEL=
fi
	
if [[ -z ${argv1} ]] ; then
	if [[ -f "${svcdir}/softlevel" ]] ; then
		export SOFTLEVEL="$(< "${svcdir}/softlevel")"
	else
		export SOFTLEVEL="${BOOTLEVEL}"
	fi
else
	export SOFTLEVEL="${argv1}"
fi

if [[ ! -f "${svcdir}/softlevel" ]] ; then
	echo "${SOFTLEVEL}" > "${svcdir}/softlevel"
fi

# For keeping a list of services that fails during boot/halt
if [[ ! -d "${svcdir}/failed" ]] ; then
	mkdir -p -m 0755 "${svcdir}/failed"
else
	rm -rf "${svcdir}"/failed/*
fi

if [[ ${SOFTLEVEL} == "reboot" || ${SOFTLEVEL} == "shutdown" ]] ; then
	myscripts=

elif [[ ! -d "/etc/runlevels/${SOFTLEVEL}" ]] ; then
	eerror "ERROR:  runlevel ${SOFTLEVEL} does not exist; exiting ..."
	exit 1
else
	myscripts=
	if [[ ${SOFTLEVEL} != "${BOOTLEVEL}" ]] ; then
		# Normal runlevels *include* boot scripts
		mylevels="$(dolisting "/etc/runlevels/${SOFTLEVEL}/")"
		mylevels="${mylevels} $(dolisting "/etc/runlevels/${BOOTLEVEL}/")"
	else
		# Non-normal runlevels don't include boot scripts as default
		mylevels="$(dolisting "/etc/runlevels/${SOFTLEVEL}/")"

		# As we're in the bootlevel, add any services that failed due
		# to /dev/.rcsysinit existing to the list
		if [[ -d /dev/.rcboot ]] ; then
			COLDPLUG_SERVICES=
			for x in $(dolisting /dev/.rcboot/) ; do
				[[ -L ${x} ]] && COLDPLUG_SERVICES="${COLDPLUG_SERVICES} ${x##*/}"
			done
			for x in ${COLDPLUG_SERVICES} ; do
				if [[ ! -e /etc/runlevels/"${BOOTLEVEL}"/"${x}" \
				&& ! -e /etc/runlevels/"${DEFAULTLEVEL}"/"${x}" ]] ; then
					myscripts="${myscripts} ${x}"
					mark_service_coldplugged "${x}"
				fi
			done
			einfo "Device initiated services:${HILITE}${myscripts}${NORMAL}"
			rm -rf /dev/.rcboot
		fi
 	fi
	
	for x in ${mylevels} ; do
		[[ -L ${x} ]] && myscripts="${myscripts} ${x##*/}"
	done
fi

# The softscripts dir contains all scripts that belong to the
# runlevel specified in ${svcdir}/softlevel
# It needs to be a new directory, else when stopping the services
# and the old directory is not intact, things get broken

mkdir -p -m 0755 "${svcdir}/softscripts.new"

for x in ${myscripts} ; do
	if [[ ! -e "/etc/init.d/${x}" ]] ; then
		ewarn "WARNING:  /etc/init.d/${x} missing; skipping ..."
		continue
	fi
	# The -f eliminates a warning if the symlink already exists,
	# which can happen if a service is in both the boot level and
	# the current "normal" runlevel
	ln -snf "/etc/init.d/${x}" "${svcdir}/softscripts.new/${x}"
done

get_stop_services() {
	local x list

	for x in $(dolisting "${svcdir}/inactive/") \
	         $(dolisting "${svcdir}/started/") ; do
		list="${list} ${x##*/}"
	done

	reverse_list $(trace_dependencies ${list})
}

dep_stop() {
	local x dep needsme depservice
	local myservice="${1##*/}"

	service_stopped "${myservice}" && return 0
	
	[[ -L ${svcdir}/softscripts.new/${service} ]] \
		&& return 0

	if [[ ${SOFTLEVEL} != "reboot" \
		  && ${SOFTLEVEL} != "shutdown" ]] ; then
			service_coldplugged "${service}" && return 0
		if net_service "${service}" ; then
			[[ -z ${OLDSOFTLEVEL} ]] \
			|| ! in_runlevel "${service}" "${OLDSOFTLEVEL}" \
				&& return 0
		fi
	fi

	# Should not work for 'use'
	if [[ -z $(needsme "${myservice}") ]] ; then
		# Nothing depends on me
		stop_service "${myservice}"
	else
		# Something may depend on me
		needsme=0
		
		for dep in $(needsme "${myservice}") ; do
			if [[ -L "${svcdir}/softscripts.new/${dep}" ]] ; then
				needsme=1
				break
			fi
		done
		
		[[ ${needsme} -eq 0 ]] && stop_service "${myservice}"
	fi
}

# Stop services
if [[ ${SOFTLEVEL} != "reboot" && \
      ${SOFTLEVEL} != "shutdown" ]] ; then
	for i in $(get_stop_services) ; do
		dep_stop "${i}"
	done
	
	# Wait for any services that may still be stopping ...
	[[ ${RC_PARALLEL_STARTUP} = "yes" ]] && wait
else
	get_critical_services

	is_critical_service() {
		local x
		local myservice="${1##*/}"

		for x in ${CRITICAL_SERVICES} ${LOGGER_SERVICE} ; do
			[[ ${myservice} == "${x}" ]] && return 0
		done

		return 1
	}

	# First stop non critical services
	for i in $(get_stop_services) ; do
		is_critical_service "${i}" || dep_stop "${i}"
	done

	# Wait for any services that may still be stopping ...
	[[ ${RC_PARALLEL_STARTUP} == "yes" ]] && wait

	export STOP_CRITICAL="yes"
	# Now stop the rest
	for i in $(get_stop_services) ; do
		dep_stop "${i}"
	done
	unset STOP_CRITICAL
fi

# Only change softlevel AFTER all the services have been stopped,
# else they will not get the depend's right (wrong SOFTLEVEL)

echo "${SOFTLEVEL}" > "${svcdir}/softlevel"

if [[ ${SOFTLEVEL} == "reboot" || ${SOFTLEVEL} == "shutdown" ]] ; then
	# Clear $svcdir from stale entries, but leave the caches around, as it
	# should help speed things up a bit
	rm -rf $(ls -d1 "${svcdir}/"* 2>/dev/null | \
	         grep -ve '\(depcache\|deptree\|envcache\)')

	# Call halt.sh with LC_ALL=C so that bash doesn't load any locales
	# which could interfere with unmounting /usr
	LC_ALL=C exec /etc/init.d/halt.sh "${SOFTLEVEL}"

	# Should never get here
	exit 0
fi

# Move the old softscritps directory to a different one
# and make the new softscripts directory the current

mv -f "${svcdir}/softscripts" "${svcdir}/softscripts.old"
mv -f "${svcdir}/softscripts.new" "${svcdir}/softscripts"

get_start_services() {
	local x list

	get_critical_services
	list="${CRITICAL_SERVICES}"

	[[ -n ${LOGGER_SERVICE} && \
	   -L "${svcdir}/softscripts/${LOGGER_SERVICE}" ]] && \
		list="${list} ${LOGGER_SERVICE}"

	for x in $(dolisting "${svcdir}/softscripts/") ; do 
		list="${list} ${x##*/}"
	done

	trace_dependencies ${list}
}

# Start scripts
for i in $(get_start_services) ; do
	if service_stopped "${i}" ; then
		start_service "${i}"
	fi
done

# Wait for any services that may still be running ...
[[ ${RC_PARALLEL_STARTUP} == "yes" ]] && wait

# Clean the old runlevel
rm -rf "${svcdir}/softscripts.old" &>/dev/null

# Runlevel end, so clear stale fail list
rm -rf "${svcdir}/failed" &>/dev/null

# If we were in the boot runlevel, it is done now ...
[[ -n ${BOOT} ]] && unset BOOT

# Remove the cached CONSOLETYPE
unset CONSOLETYPE

# vim:ts=4