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mk_dreamplug_rootfs
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mk_dreamplug_rootfs
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#!/bin/bash
#
# Copyright 2011 by Bdale Garbee <[email protected]>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# based on work by <[email protected]>, who released his script under
# the following license terms:
# ----------------------------------------------------------------------------
# "THE BEER-WARE LICENSE" (Revision 42):
# As long as you retain this notice you can do whatever you want with
# this stuff. If we meet some day, and you think this stuff is worth it,
# you can buy me a beer in return.
# ----------------------------------------------------------------------------
# mk_dreamplug_rootfs
#
# Runs multistrap and readies the resulting root filesystem to silently
# complete package configuration on the first boot-up.
# We don't tolerate errors.
set -e
# where to build images, etc
basedir=`pwd`/build
target=$basedir/dreamplug
tmpdir=$basedir/tmp
pkgcache=$tmpdir/aptcache
mkdir -p $target
mkdir -p $tmpdir
mkdir -p $pkgcache
hostname='freedombox'
rootpassword='freedom'
kernel_version="$(ls kernel/linux-image-*.deb | sort -rn | head -n1 | cut -d_ -f1 | sed s#kernel/linux-image-##)"
rm -rf $target/*
mkdir -p $target/var/cache/apt/ && mount -o bind $pkgcache $target/var/cache/apt/
echo "Multistrapping..."
multistrap -f fbx-armel.conf -d $target
umount $target/var/cache/apt/
mkdir $target/var/cache/apt/archives
# don't leave target image containing apt config of the build host
# FIXME -- we could do this better, using ftp.debian.org is a temporary hack
echo "clean up target apt configuration"
rm -f $target/etc/apt/sources.list.d/multistrap-debian.list
cp etc/sources.list $target/etc/apt/sources.list
# kludge around Dreamplug kernel support not being available in Debian main yet
echo "copy kernel packages to target filesystem"
mkdir -p $target/tmp/kernel
cp kernel/*.deb $target/tmp/kernel/
cp kernel/uImage $target/tmp/kernel/
echo "copy copy2dream.sh script to target filesystem"
cp bin/copy2dream.sh $target/sbin/copy2dream
chown root:root $target/sbin/copy2dream
chmod 744 $target/sbin/copy2dream
# Until udev is configured and run for the first time, dev nodes won't be created, but we need some basic ones for spawning a console (console) and creating RSA keys for SSH (urandom).
echo "Creating basic device nodes"
mknod $target/dev/console c 5 1
mknod $target/dev/random c 1 8
mknod $target/dev/urandom c 1 9
mknod $target/dev/null c 1 3
mknod $target/dev/ptmx c 5 2
# Basic fstab & mtab..
echo "Setting up basic fstab & mtab"
echo "
rootfs / rootfs relatime,rw 0 0
proc /proc proc none 0 0
sys /sys sysfs none 0 0
none /dev/pts devpts defaults 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev 0 0
/dev/sdc1 /boot vfat defaults 0 0
" > $target/etc/fstab
touch $target/etc/mtab
# Set up hostname
echo "Setting up hostname, /etc/network/interfaces, nameservers, persistent-net-generator rules"
echo $hostname > $target/etc/hostname
# Create /etc/network/interfaces
echo "# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp
allow-hotplug eth1
iface eth1 inet dhcp
" > $target/etc/network/interfaces
# Setup nameserver (use OpenDNS by default)
echo "nameserver 208.67.222.222
nameserver 208.67.220.220" > $target/etc/resolv.conf
# Touch the net generator udev so that eth0 won't be reassigned in case the user
# changes the MAC address - this may happen if you change the rootfs between plugs.
touch $target/etc/udev/rules.d/75-persistent-net-generator.rules
# generate configuration script
echo "Create script to configure packages in qemu-user-static"
echo "
echo \"Preconfiguring dash - else dash and bash will be left in a broken state\"
/var/lib/dpkg/info/dash.preinst install
echo \"Configuring all packages\"
export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true
export LC_ALL=C LANGUAGE=C LANG=C
dpkg --configure -a
# sshd may be left running by the postinst, clean that up
/etc/init.d/ssh stop
# post-install operations for kernel packages
echo \"Installing kernel content\"
dpkg --install /tmp/kernel/*.deb
# pre-processed bootable kernel image crafted from above using flash-kernel
cp /tmp/kernel/uImage /boot/uImage
# flash-kernel $kernel_version
# Establish an initial root password
echo \"Set root password to \"$rootpassword
echo root:$rootpassword | /usr/sbin/chpasswd
# By default, spawn a console on the serial port
echo \"Adding a getty on the serial port\"
echo \"T0:12345:respawn:/sbin/getty -L ttyS0 115200 vt100\" >> /etc/inittab
echo \"Tweaks to reduce flash writes as per http://www.plugcomputer.org/plugwiki/index.php/Reduce_Flash_Writes\"
echo \"
# Reduce writes to flash drives
vm.laptop_mode=5
vm.swappiness=0
vm.dirty_writeback_centisecs=1500
vm.dirty_expire_centisecs=1500
\" >> /etc/sysctl.d/freedombox.conf
echo \"Deleting this very same script\"
rm -f /install.sh
echo \"Syncing filesystem just in case something didn't get written\"
sync
echo \"End configuration progress by exiting from the chroot\"
exit
" > $target/install.sh
chmod 755 $target/install.sh
echo "Using qemu-user-static to perform first-boot configuration now."
mkdir -p $target/usr/bin
cp /usr/bin/qemu-arm-static $target/usr/bin
chroot $target /install.sh
rm $target/usr/bin/qemu-arm-static
echo "Syncing..."
sync
echo "Finished. You may now copy the rootfs to the plug."