live-debconfig 4.0~alpha31-1 / lib / live / debconfig / 0050-sysvinit

#!/bin/sh

## live-debconfig(7) - System Configuration Components
## Copyright (C) 2006-2013 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.


set -e

DEBCONF_SYSTEMRC="/var/lib/live/debconfig/systemrc"
export DEBCONF_SYSTEMRC

. /usr/share/debconf/confmodule

if [ ! -e /usr/share/sysvinit/inittab ]
then
	# System does not use sysvinit
	exit 0
fi

Defaults ()
{
	_LXC_ENABLE="${_LXC_ENABLE:-false}"
	_LXC_CONSOLES="${_LXC_CONSOLES:-6}"
	_LXC_DISABLE_SERVICES="${_LXC_DISABLE_SERVICES:-checkroot.sh hwclockfirst.sh hwclock.sh kmod module-init-tools mountall.sh mountkernfs.sh umountfs umountroot}"
}

db_get live-debconfig/sysvinit/lxc-enable
_LXC_ENABLE="${RET}" # boolean

db_get live-debconfig/sysvinit/lxc-consoles
_LXC_CONSOLES="${RET}" # string (w/o empty)

db_get live-debconfig/sysvinit/lxc-disable-services
_LXC_DISABLE_SERVICES="${RET}" # string (w/o empty)

Defaults

db_set live-debconfig/sysvinit/lxc-enable "${_LXC_ENABLE}"
db_fset live-debconfig/sysvinit/lxc-enable seen false

db_set live-debconfig/sysvinit/lxc-consoles "${_LXC_CONSOLES}"
db_fset live-debconfig/sysvinit/lxc-consoles seen false

db_set live-debconfig/sysvinit/lxc-disable-services "${_LXC_DISABLE_SERVICES}"
db_fset live-debconfig/sysvinit/lxc-disable-services seen false

db_settitle live-debconfig/title
db_input high live-debconfig/sysvinit/lxc-enable || true
db_go

db_get live-debconfig/sysvinit/lxc-enable
_LXC_ENABLE="${RET}" # boolean

case "${_LXC_ENABLE}" in
	true)
		db_settitle live-debconfig/title
		db_input high live-debconfig/sysvinit/lxc-consoles || true
		db_go

		db_settitle live-debconfig/title
		db_input high live-debconfig/sysvinit/lxc-disable-services || true
		db_go

		db_get live-debconfig/sysvinit/lxc-consoles
		_LXC_CONSOLES="${RET}" # string (w/o empty)

		db_get live-debconfig/sysvinit/lxc-disable-services
		_LXC_DISABLE_SERVICES="${RET}" # string (w/o empty)

		Defaults
		;;

	false)

		;;
esac

db_stop

case "${_LXC_ENABLE}" in
	true)
		# Revert /etc/inittab
		cp -p /usr/share/sysvinit/inittab /etc/inittab.tmp

		# Disable sulogin
		#   ~~:S:wait:/sbin/sulogin
		sed -i -e 's|\(^[^#].*S:wait:.*$\)|#\1|' /etc/inittab.tmp

		# Disable ctrlaltdel
		#   ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
		sed -i -e 's|\(^[^#].*:ctrlaltdel:.*$\)|#\1|' /etc/inittab.tmp

		# Disable power
		#   pf::powerwait:/etc/init.d/powerfail start
		#   pn::powerfailnow:/etc/init.d/powerfail now
		#   po::powerokwait:/etc/init.d/powerfail stop
		sed -i -e 's|\(^[^#].*:power.*:.*$\)|#\1|' /etc/inittab.tmp

		# Disable normal getty
		#  1:2345:respawn:/sbin/getty 38400 tty1
		#  2:23:respawn:/sbin/getty 38400 tty2
		#  3:23:respawn:/sbin/getty 38400 tty3
		#  ...
		# Keep container getty
		#  1:2345:respawn:/sbin/getty 38400 console
		#  c1:23:respawn:/sbin/getty 38400 tty1
		#  c2:23:respawn:/sbin/getty 38400 tty2
		#  ...
		sed -i -e 's|\(^[^#,^c].*:respawn:/sbin/getty.*[^console,linux]$\)|#\1|' /etc/inittab.tmp

		# Enable container getty
		#  1:2345:respawn:/sbin/getty 38400 console
		#  c1:23:respawn:/sbin/getty 38400 tty1
		#  c2:23:respawn:/sbin/getty 38400 tty2

		if [ -e /etc/progress-linux_version ]
		then
			_OPTIONS="--nohostname 38400"
		else
			_OPTIONS="38400"
		fi

		# Assemble new entries
		_CONSOLES="\n#-- live-debconfig begin\n1:2345:respawn:/sbin/getty ${_OPTIONS} console"

		for _CONSOLE in $(seq 1 ${_LXC_CONSOLES})
		do
			_CONSOLES="${_CONSOLES}\nc${_CONSOLE}:12345:respawn:/sbin/getty ${_OPTIONS} tty${_CONSOLE} linux"
		done

		_CONSOLES="${_CONSOLES}\n#-- live-debconfig end"

		# Remove old entries
		sed -i -e '/#-- live-debconfig begin/,/#-- live-debconfig end/d' /etc/inittab.tmp

		# Add new entries
		_CONSOLE="$(grep '#[0-9].*:respawn:/sbin/getty' /etc/inittab.tmp | tail -1)"

		sed -i -e "s|\(${_CONSOLE}\)|\1${_CONSOLES}|" /etc/inittab.tmp

		# Enable powerfail entries for lxc-shutdown
		if ! grep -qs ^p0:: /etc/inittab.tmp
		then
			echo "p0::powerfail:/sbin/init 0" >> /etc/inittab.tmp
		fi

		if ! grep -qs ^p6:: /etc/inittab.tmp
		then
			echo "p6::ctrlaltdel:/sbin/init 6" >> /etc/inittab.tmp
		fi

		mv /etc/inittab.tmp /etc/inittab

		# squeeze and newer have /dev/tty and /dev/tty0 by default
		for _CONSOLE in $(seq 1 ${_LXC_CONSOLES})
		do
			if [ ! -e "/dev/tty${_CONSOLE}" ]
			then
				mknod "/dev/tty${_CONSOLE}" c 4 "${_CONSOLE}"
			fi
		done

		# Remove uneeded services in a container
		for _SERVICE in ${_LXC_DISABLE_SERVICES}
		do
			# service does not exist
			if [ ! -e /etc/init.d/${_SERVICE} ]
			then
				continue
			fi

			_ALREADY_DISABLED="false"

			# service is already disabled
			for _RUNLEVEL in /etc/rc*.d
			do
				if ! ls ${_RUNLEVEL}/K*${_SERVICE} > /dev/null 2>&1
				then
					# disabled services have stop links in all runlevels
					# if at least one runlevel does not have a stop link,
					# then the service was not disabled and we need to continue
					# with disabling the service later on
					_ALREADY_DISABLED="false"
					break
				fi

				# service is indeed already disabled
				_ALREADY_DISABLED="true"
			done

			if [ "${_ALREADY_DISABLED}" = "false" ]
			then
				if ls /etc/rc*.d/K*${_SERVICE} > /dev/null 2>&1 && \
				   ! ls /etc/rc*.d/S*${_SERVICE} > /dev/null 2>&1
				then
					# service has only stop links
					# therefore, using 'update-rc.d disable' does not work,
					# and using 'update-rc.d remove' is not upgrade safe
					# (on upgrades, the stop links would be re-added).
					for _SYMLINK in /etc/rc*.d/K*${_SERVICE}
					do
						rm -f ${_SYMLINK}
						ln -s /bin/live-initscripts-empty-stop ${_SYMLINK}
					done
				fi

				# service is a normal service with both start and stop links
				update-rc.d -f ${_SERVICE} disable 2>&1 | \
					grep -v -e "^insserv: warning:" \
						-e "^update-rc.d: warning:" \
						-e "^update-rc.d: using dependency based boot sequencing" \
						-e "^update-rc.d: error: .* Default-Start contains no runlevels, aborting." \
					|| true
			fi
		done
		;;

	false)
		# Revert /etc/inittab
		cp -p /usr/share/sysvinit/inittab /etc/inittab

		# Renable services
		for _SERVICE in ${_LXC_DISABLE_SERVICES}
		do
			if [ -e "/etc/init.d/${_SERVICE}" ]
			then
				rm -f /etc/rc*.d/S*${_SERVICE}
				rm -f /etc/rc*.d/K*${_SERVICE}

				update-rc.d -f ${_SERVICE} defaults 2>&1 | \
					grep -v -e "^insserv: warning:" \
						-e "^update-rc.d: warning:" \
						-e "^update-rc.d: using dependency based boot sequencing" \
						-e "^update-rc.d: error: .* Default-Start contains no runlevels, aborting." \
					|| true
			fi
		done
		;;
esac