live-build/scripts/build/chroot_dpkg

#!/bin/sh

## live-build(7) - System Build Scripts
## 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

# Including common functions
[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh

# Setting static variables
DESCRIPTION="$(Echo 'manage /sbin/dpkg')"
HELP=""
USAGE="${PROGRAM} {install|remove} [--force]"

Arguments "${@}"

# Reading configuration files
Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults

# Requiring stage file
Require_stagefile .build/config .build/bootstrap

case "${1}" in
	install)
		Echo_message "Configuring file /sbin/start-stop-daemon"

		# Checking stage file
		Check_stagefile .build/chroot_dpkg

		# Checking lock file
		Check_lockfile .lock

		# Creating lock file
		Create_lockfile .lock

		# Create custom start-stop-daemon program
		Chroot chroot dpkg-divert --rename --quiet --add /sbin/start-stop-daemon

cat > chroot/sbin/start-stop-daemon << EOF
#!/bin/sh

exit 0
EOF

		chmod 755 chroot/sbin/start-stop-daemon

		# Disable dpkg syncing

cat > chroot/etc/dpkg/dpkg.cfg.d/live-build << EOF
force-unsafe-io
EOF

		# Manual hacks for special packages

		# Generic live-build handle for other live packages to act upon
		touch chroot/.live-build

		# samhain
		if [ -e /var/state/samhain/samhain_file ]
		then
			mv /var/state/samhain/samhain_file /var/state/samhain/samhain_file.orig
		else
			mkdir -p /var/state/samhain
			touch /var/state/samhain/samhain_file
		fi

		# flash-kernel
		Chroot chroot dpkg-divert --rename --quiet --add /usr/sbin/flash-kernel
		ln -s /bin/true chroot/usr/sbin/flash-kernel

		# Creating stage file
		Create_stagefile .build/chroot_dpkg
		;;

	remove)
		Echo_message "Deconfiguring file /sbin/start-stop-daemon"

		# Checking lock file
		Check_lockfile .lock

		# Creating lock file
		Create_lockfile .lock

		# Manual hacks for special packages

		# Generic live-build handle
		rm -f chroot/.live-build

		# flash-kernel
		rm -f chroot/usr/sbin/flash-kernel
		Chroot chroot dpkg-divert --rename --quiet --remove /usr/sbin/flash-kernel

		# samhain
		if [ -e /var/state/samhain/samhain_file.orig ]
		then
			mv /var/state/samhain/samhain_file.orig /var/state/samhain/samhain_file
		elif [ -d /var/state/samhain ]
		then
			rm -f /var/state/samhain/samhain_file
			rmdir --ignore-fail-on-non-empty /var/state/samhain || true
		fi

		# Remove custom start-stop-daemon program
		rm -f chroot/sbin/start-stop-daemon
		Chroot chroot dpkg-divert --rename --quiet --remove /sbin/start-stop-daemon

		# Remove dpkg sync configuration
		rm -f chroot/etc/dpkg/dpkg.cfg.d/live-build

		# Removing stage file
		rm -f .build/chroot_dpkg
		;;

	*)
		Usage
		;;
esac