path: root/sbin/rc

#!/sbin/runscript
# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

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

# Check that $1 exists ...
check_statedir() {
	[ -z "$1" ] && return 0

	if [ ! -d "$1" ] ; then
		if ! mkdir -p "$1" &>/dev/null ; then
			echo
			eerror "For Gentoo to function properly, \"$1\" needs to exist."
			einfo "Rebooting"
			/sbin/reboot -f
		fi
	fi

	return 0
}

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
}

# Save $1
argv1="$1"

# we need this to prevent a warning below
[[ ! -e ${svcdir}/softlevel ]] && touch ${svcdir}/softlevel

# 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" || ( ${argv1} = "boot" && "$(<${svcdir}/softlevel)" != "sysinit" ) ]]
then
	# Setup initial $PATH just in case
	PATH="/bin:/sbin:/usr/bin:/usr/sbin:${PATH}"

	echo
	echo -e "${GOOD}Gentoo Linux${GENTOO_VERS}; ${BRACKET}http://www.gentoo.org/${NORMAL}"
	echo -e " Copyright 1999-2005 Gentoo Foundation; Distributed under the GPLv2"
	echo
	
	check_statedir /proc
	check_statedir /dev

	# We set the forced softlevel from the kernel command line
	# It needs to be run right after proc is mounted for the
	# boot runlevel
	setup_defaultlevels

	# $BOOT can be used by rc-scripts to test if it is the first time
	# the 'boot' runlevel is executed.  Now also needed by some stuff in
	# the 'sysinit' runlevel ...
	export BOOT="yes"

	start_critical_service() {
		(
		local retval=
		local service=$1
		# Needed for some addons like dm-crypt that starts in critical services
		local myservice=$1

		source "/etc/init.d/${service}" || eerror "Failed to source /etc/init.d/${service}"
		retval=$?
		[ "${retval}" -ne 0 ] && return "${retval}"
		[ -e "/etc/conf.d/${service}" ] && source "/etc/conf.d/${service}"
		source /etc/rc.conf

		start || eerror "Failed to start /etc/init.d/${service}"
		retval=$?

		return "${retval}"
		)
	}

	# We first try to find a locally defined list of critical services
	# for a particular runlevel.  If we cannot find it, we use the
	# defaults.
	get_critical_services

	export START_CRITICAL="yes"
	
	# We do not want to break compatibility, so we do not fully integrate
	# these into /sbin/rc, but rather start them by hand ...
	for x in ${CRITICAL_SERVICES}
	do
		if ! start_critical_service "${x}" ; then
			echo
			eerror "One of more critical startup scripts failed to start!"
			einfo "Rebooting"
			/sbin/reboot -f
		fi
	done

	unset START_CRITICAL

	# Check that $svcdir exists ...
	check_statedir "${svcdir}"

	# 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 '\(depcache\|deptree\|envcache\)')

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

	# Update the dependency cache
	/sbin/depscan.sh -u

	# Now that the dependency cache are up to date, make sure these
	# are marked as started ...
	(
		# Needed for mark_service_started()
		source "${svclib}/sh/rc-services.sh"
		
		for x in ${CRITICAL_SERVICES}
		do
			mark_service_started "${x}"
		done
	)

	# Setup login records ... this has to be done here because when 
	# we exit this runlevel, init will write a boot record to utmp
	# If /var/run is readonly, then print a warning, not errors
	if touch /var/run/utmp 2>/dev/null
	then
		> /var/run/utmp
		touch /var/log/wtmp
		chgrp utmp /var/run/utmp /var/log/wtmp
		chmod 0664 /var/run/utmp /var/log/wtmp
		# Remove /var/run/utmpx (bug from the past)
		rm -f /var/run/utmpx
	else
		ewarn "Skipping /var/run/utmp initialization (ro root?)"
	fi

	[[ ${argv1} = "boot" ]] || 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

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 [ "${SOFTLEVEL}" = "reboot" -o "${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}/")"
	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
	
	# Candidate for zapping ?
	[[ ! -L ${svcdir}/softscripts.new/${myservice} ]] || \
		return 0

	# 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 service_started "${dep}" && \
			if [[ -L "${svcdir}/softscripts.new/${dep}" ]] ; then
				# This dep is valid
				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
	source /sbin/functions.sh
	
	# 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 '\(depcache\|deptree\|envcache\)')
	
	source /etc/init.d/halt.sh
	
	# we just die here since we have no init 
	# and we should be the last running process
	if [[ ${RC_INITSTYLE_HACK} == "yes" ]] ; then
		exit 0
	fi
	
	if [[ ${SOFTLEVEL} == "reboot" ]] ; then
		source /etc/init.d/reboot.sh
	else
		source /etc/init.d/shutdown.sh
	fi
	
	# 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 ...
if [[ -n ${BOOT} ]] ; then
	unset BOOT
	
	if [[ "${RC_INITSTYLE_HACK}" = "yes" ]]; then
		/sbin/rc default
	fi
fi

# Remove the cached CONSOLETYPE
unset CONSOLETYPE

# vim:ts=4