From a9ec33b106cfb05fb68c3f46824ff23f6ce681ae Mon Sep 17 00:00:00 2001
From: Cosmin Gorgovan <cosmin@linux-geek.org>
Date: Sun, 1 Feb 2015 04:30:16 +0000
Subject: [PATCH] Initial commit

---
 .gitignore      |   1 +
 README.md       |   0
 build_rootfs.sh | 131 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100755 build_rootfs.sh

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ed23d00
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+rootfs
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e69de29
diff --git a/build_rootfs.sh b/build_rootfs.sh
new file mode 100755
index 0000000..dd2b9a9
--- /dev/null
+++ b/build_rootfs.sh
@@ -0,0 +1,131 @@
+#!/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
+