live-build/scripts/build/lb_chroot_proc

#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2006-2012 Daniel Baumann <daniel@debian.org>
##
## live-build 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
. "${LB_BASE:-/usr/share/live/build}"/scripts/build.sh

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

Arguments "${@}"

# Ensure that a system is built as root
lb testroot

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

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

case "${1}" in
	install)
		Echo_message "Begin mounting /proc..."

		# Checking stage file
		Check_stagefile .stage/chroot_proc

		# Checking lock file
		Check_lockfile .lock

		# Creating lock file
		Create_lockfile .lock

		if [ "${LB_USE_FAKEROOT}" != "true" ]
		then
			# Creating mountpoint
			mkdir -p chroot/proc

			# Mounting /proc
			${LB_ROOT_COMMAND} mount proc-live -t proc chroot/proc
		else
			rm -rf chroot/proc
			ln -s /proc chroot/
		fi

		# Creating stage file
		Create_stagefile .stage/chroot_proc
		;;

	remove)
		Echo_message "Begin unmounting /proc..."

		# Checking lock file
		Check_lockfile .lock

		# Creating lock file
		Create_lockfile .lock

		if [ "${LB_USE_FAKEROOT}" != "true" ]
		then
			# Workaround binfmt-support /proc locking
			if [ -e chroot/proc/sys/fs/binfmt_misc/status ]
			then
				${LB_ROOT_COMMAND} umount chroot/proc/sys/fs/binfmt_misc
			fi

			# Unmounting /proc
			#fuser -km chroot/proc
			if [ -e chroot/proc/version ]
			then
				${LB_ROOT_COMMAND} umount chroot/proc
			fi
		else
			rm -rf chroot/proc
			mkdir -p chroot/proc
		fi

		# Removing stage file
		rm -f .stage/chroot_proc
		;;

	*)
		Usage
		;;
esac