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Cosmin Gorgovan 2015-02-01 04:30:16 +00:00
commit a9ec33b106
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rootfs

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#!/bin/bash
# Copyright (c) 2015, Cosmin Gorgovan <cosmin at linux-geek dot org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
print_usage() {
echo "Usage: build_rootfs.sh [OPTIONS]"
echo "Valid options: "
echo " --skip-deps-check don't check if dependencies are installed"
echo " --help prints this message"
}
check_dependencies() {
dpkg -s debian-archive-keyring debootstrap > /dev/null
if [ $? -ne 0 ] ; then
echo
echo "Error: Some dependencies appear to be missing. Aborting."
exit 1
fi
}
parse_args() {
for arg in "$@"; do
case $arg in
--skip-deps-check)
dep_check=false
;;
--help)
print_usage
exit 0
;;
*)
echo "Unrecognized option $arg"
echo
print_usage
exit 1
;;
esac
done
}
config_rootfs() {
echo
echo "Configuring the newly build rootfs..."
echo "okreader" > ./rootfs/etc/hostname
echo -e "127.0.0.1 localhost okreader\n" > ./rootfs/etc/hosts
echo -e "nameserver 8.8.8.8\nnameserver 8.8.4.4\n" > ./rootfs/etc/resolv.conf
echo -e "\nT0:23:respawn:/sbin/getty -L ttymxc0 115200 vt100\n" >> ./rootfs/etc/inittab
mkdir ./rootfs/mnt/onboard
echo -e "/dev/mmcblk0p3 /mnt/onboard vfat noatime 0 1\n" > ./rootfs/etc/fstab
echo -e "tmpfs /tmp tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
# Prevents documentation from being installed to persistent storage
echo -e "tmpfs /usr/share/man tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
echo -e "tmpfs /usr/share/info tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
echo -e "tmpfs /usr/share/doc tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
# Don't store logs (to save space & reduce flash wear)
echo -e "tmpfs /var/log tmpfs defaults 0 0\n" >> ./rootfs/etc/fstab
echo "Configuration done."
}
clean_up_rootfs() {
echo "Cleaning up..."
# SSH keys must be unique for each device. Run dpkg-reconfigure openssh-server on the device.
rm ./rootfs/etc/ssh/ssh_host*key*
# Remove cached packages and documentation to reduce the size of the FS
rm ./rootfs/var/cache/apt/archives/*.deb
rm -R ./rootfs/usr/share/man/*
rm -R ./rootfs/usr/share/info/*
rm -R ./rootfs/usr/share/doc/*
rm -R ./rootfs/var/log/*
echo "Cleanup done."
}
build_rootfs() {
debootstrap --arch=armhf --variant=minbase \
--include=net-tools,wireless-tools,wpasupplicant,kmod,udev,openssh-server,iputils-ping,ifupdown,vim-tiny \
wheezy ./rootfs http://http.debian.net/debian/
if [ $? -ne 0 ] ; then
echo
echo "Error: Debootstrap seems to have failed. Aborting."
exit 1
fi
config_rootfs
clean_up_rootfs
}
dep_check=true
parse_args $@
if [[ $EUID -ne 0 ]]; then
echo "Error: This script must be run as root. Aborting."
exit 1
fi
if $dep_check ; then
check_dependencies
fi
build_rootfs