Build a custom Raspian image #2

COPYING.txt

# originally copied from http://michael.gorven.za.net/blog/2012/10/22/building-raspbian-images-raspberry-pi

# Copyright (C) 2012 Michael Gorven <http://michael.gorven.za.net/>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

mkraspbianxbmc.sh

#!/bin/sh

# Copyright (C) 2012 Michael Gorven <http://michael.gorven.za.net/>
# Copyright (C) 2012 Alexandre Bulté <alexandre[at]bulte[dot]net>


set -ev

NAME="${1?Please specify output image name.}"
IMAGE_SIZE=1000
BOOT_SIZE=64
ALIGN_SECTORS=8192
ALIGN_FSBLOCKS="$(($ALIGN_SECTORS*512/4096))"
#LOCAL_MIRROR="file:/root/chroot/mirrors/debian"
LOCAL_MIRROR=$MIRROR
MIRROR="http://mirrordirector.raspbian.org/raspbian"
BASE_PACKAGES="openssh-server sudo ntp fake-hwclock raspi-copies-and-fills raspi-config"
RPI_USER=alexandre
RPI_PASSWD=alexandre
RPI_HOSTNAME=rpialb
GPU_MEM=16
##START_ELF=arm240_start.elf

#BUILDROOT="$(mktemp -d $PWD/raspbian.XXXXXX)/root/"
BUILDROOT="/root/make_raspbian_git/raspbian.8hvUou/root/"

export LANG=fr_FR.UTF-8
export LC_ALL=fr_FR.UTF-8
export LANGUAGE=fr_FR

check_host() {
	if [ $(id -u) != 0 ]; then
		echo "This script must be run as root."
		exit 2
	fi

	for BINARY in wget gpg qemu-debootstrap rsync kpartx sfdisk mkfs.ext4 mkfs.vfat tune2fs tar; do
		if ! which $BINARY > /dev/null; then
			echo "Unable to find $BINARY binary, please install it"
			exit 1
		fi
	done

        echo "check_host OK"
}

bootstrap() {
	if [ ! "$BUILDROOT" ]; then
		echo "BUILDROOT is empty, aborting."
		exit 1
	fi

	#KEYRING="${TMPDIR:-/tmp}/raspbian.gpg"
	#if [ ! -s "$KEYRING" ]; then
	#	wget -O- http://archive.raspbian.org/raspbian.public.key | gpg --no-default-keyring --keyring "$KEYRING" --import
	#fi

	qemu-debootstrap --arch=armhf --no-check-gpg wheezy "$BUILDROOT" "$LOCAL_MIRROR"

        echo "bootstrap OK"
}

configure_base() {
	if [ ! "$BUILDROOT" ]; then
		echo "BUILDROOT is empty, aborting."
		exit 1
	fi

	cat > "$BUILDROOT/usr/sbin/policy-rc.d" <<-EOF
	#!/bin/sh
	exit 101
	EOF
	chmod +x "$BUILDROOT/usr/sbin/policy-rc.d"

	cat > "$BUILDROOT/etc/apt/sources.list" <<-EOF
	deb $MIRROR wheezy main contrib non-free rpi
	EOF

	cat > "$BUILDROOT/etc/apt/sources.list.d/raspi.list" <<-EOF
	deb http://archive.raspberrypi.org/debian/ wheezy main
	EOF

	if [ "$http_proxy" ]; then
		cat > "$BUILDROOT/etc/apt/apt.conf.d/30proxy" <<-EOF
		Acquire::http::proxy "$http_proxy";
		EOF
	fi

	wget -O- http://archive.raspberrypi.org/debian/raspberrypi.gpg.key | chroot "$BUILDROOT" apt-key add -

	export DEBIAN_FRONTEND=noninteractive
	chroot "$BUILDROOT" apt-get --yes update
	chroot "$BUILDROOT" apt-get --yes dist-upgrade
	chroot "$BUILDROOT" apt-get --yes install raspberrypi-bootloader libraspberrypi-bin $BASE_PACKAGES

	cat > "$BUILDROOT/boot/config.txt" <<-EOF
	gpu_mem=$GPU_MEM
	disable_overscan=1
	EOF

	cat > "$BUILDROOT/boot/cmdline.txt" <<-EOF
	dwc_otg.lpm_enable=0 dwc_otg.fiq_fix_enable=1 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=noop rootwait
	EOF

	chroot "$BUILDROOT" adduser --disabled-password --gecos 'Raspberry Pi User,,,,' pi
	echo "$RPI_USER:$RPI_PASSWD" | chroot "$BUILDROOT" chpasswd
	chroot "$BUILDROOT" adduser $RPI_USER sudo

	cat >> "$BUILDROOT/etc/network/interfaces" <<-EOF
	auto eth0
	iface eth0 inet dhcp
	EOF

	echo "$RPI_HOSTNAME" > "$BUILDROOT/etc/hostname"

	cat >> "$BUILDROOT/etc/hosts" <<-EOF
	127.0.0.1	$RPI_HOSTNAME
	EOF

	cat > "$BUILDROOT/etc/fstab" <<-EOF
	LABEL=boot	/boot	vfat	defaults	0	2
	LABEL=root	/		ext4	errors=remount-ro,noatime,nodiratime	0	1
	EOF
	
	#TODO?
	#from http://www.raspberrypi.org/phpBB3/viewtopic.php?t=17788
	#proc            /proc           proc    defaults          0       0
	#/dev/mmcblk0p1  /boot           vfat    defaults          0       2
	#/dev/mmcblk0p2  /               ext4    defaults,noatime  0       1

	cat >> "$BUILDROOT/etc/modules" <<-EOF
	vchiq
	snd_bcm2835
	EOF

	cat > "$BUILDROOT/etc/sysctl.d/raspi.conf" <<-EOF
	vm.min_free_kbytes = 8192
	EOF

	# no longer needed ?
	#cp "$BUILDROOT/boot/$START_ELF" "$BUILDROOT/boot/start.elf"

	echo "configure_base OK"
}

cleanup() {
	chroot "$BUILDROOT" apt-get --yes clean
	find "$BUILDROOT/var/lib/apt/lists/" -type f -delete
	rm -f "$BUILDROOT/etc/apt/apt.conf.d/30proxy" "$BUILDROOT/usr/sbin/policy-rc.d"
        echo "cleanup OK"
}

mkimage() {
	IMAGE="$NAME.img"
	TAR="$NAME.tar.gz"

	dd if=/dev/zero of="$IMAGE" bs=1MB count=0 seek="$IMAGE_SIZE"
	BOOT_SECTORS="$(($BOOT_SIZE*2048/$ALIGN_SECTORS*$ALIGN_SECTORS))"
	cat | sfdisk --quiet --unit S --force "$IMAGE" <<-EOF
	$ALIGN_SECTORS,$(($BOOT_SECTORS)),c,*
	$(($ALIGN_SECTORS+$BOOT_SECTORS)),,L

	EOF

	LOOP="$(basename $(losetup -f))"
	kpartx -a "$IMAGE"
	BOOT="/dev/mapper/${LOOP}p1"
	ROOT="/dev/mapper/${LOOP}p2"

	mkfs.vfat -F 32 -n boot "$BOOT"
	mkfs.ext4 -b 4096 -E stride=$ALIGN_FSBLOCKS,stripe-width=$ALIGN_FSBLOCKS -m 1 -L root "$ROOT"
	tune2fs -i 0 -c 0 "$ROOT"

	MNT="$(mktemp -d --tmpdir raspbian.XXXXXX)"
	mount "$ROOT" "$MNT"
	mkdir "$MNT/boot"
	mount "$BOOT" "$MNT/boot"

	rsync --archive --devices --specials --hard-links --acls --xattrs --sparse --verbose "$BUILDROOT" "$MNT"

	umount "$MNT/boot"
	umount "$MNT"

	kpartx -d "$IMAGE"
	tar -cvfz "$TAR" "$IMAGE"

        echo "mkimage OK"
}


#check_host
#bootstrap
configure_base
#cleanup
#mkimage