From eff65a0d007728bf23bc52ee9f2927523758befb Mon Sep 17 00:00:00 2001
From: David Schneider <dnschneid@chromium.org>
Date: Mon, 17 Dec 2012 19:35:20 -0800
Subject: [PATCH] Initial commit.

---
 .gitignore      |   1 +
 Makefile        |  10 ++++
 enter-chroot.sh |  65 ++++++++++++++++++++++
 make-chroot.sh  | 145 ++++++++++++++++++++++++++++++++++++++++++++++++
 startxfce4.sh   |  11 ++++
 5 files changed, 232 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100755 enter-chroot.sh
 create mode 100755 make-chroot.sh
 create mode 100755 startxfce4.sh

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..2f2b2af95
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+crouton.tar.bz2
diff --git a/Makefile b/Makefile
new file mode 100644
index 000000000..1b73304bc
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+TARGET=crouton.tar.bz2
+SCRIPTS=enter-chroot.sh make-chroot.sh startxfce4.sh
+
+
+$(TARGET): $(SCRIPTS) Makefile
+	tar --owner=root --group=root --mode=a=rx,u+w -cjf $(TARGET) $(SCRIPTS)
diff --git a/enter-chroot.sh b/enter-chroot.sh
new file mode 100755
index 000000000..15389b115
--- /dev/null
+++ b/enter-chroot.sh
@@ -0,0 +1,65 @@
+#!/bin/sh -e
+# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+if [ "$1" = -h -o "$1" = --help ]; then
+    echo "Usage: ${0##*/} [chroot-label [command [args...]]]" 1>&2
+    echo "       ${0##*/} chroot-label UID \"command [args...]\"" 1>&2
+    exit 2
+fi
+
+CHROOT="/usr/local/${1:-precise}"
+[ "$#" = 0 ] || shift
+
+if [ ! "$USER" = root -a ! "$UID" = 0 ]; then
+    echo "${0##*/} must be run as root."
+    exit 2
+fi
+
+cd "$CHROOT"
+
+# Did we specify a UID on the command line?
+case "$1" in
+    ''|*[!0-9]*) cmd=;;
+     *) cmd='su - '"`awk -F: '$3=='"$1"'{print $1}' etc/passwd`"
+        shift
+        [ "$#" = 0 ] || cmd="$cmd -c";;
+esac
+
+# Ensure the chroot is executable and writable
+mp="$CHROOT"
+while ! mountpoint -q "$mp"; do
+    mp="${mp%/*}"
+    [ -z "$mp" ] && mp=/
+done
+mount -o remount,rw,dev,exec "$mp"
+unset mp
+
+# Prepare chroot filesystem
+# Soft-link resolv.conf so that updates are automatically propagated
+mkdir -p etc/host-shill
+ln -sf host-shill/resolv.conf etc/resolv.conf
+# Mounts; will auto-unmount when the script exits
+umount='umount etc/host-shill proc dev/pts sys tmp 2>/dev/null || { sleep 5; umount dev 2>/dev/null; } || true'
+trap "$umount" 0
+mount --bind /var/run/shill etc/host-shill
+mount --bind /proc proc
+mount --bind /dev dev
+mount --bind /sys sys
+mount --bind /tmp tmp
+mount -t devpts none dev/pts
+
+# Fix launching chrome/chromium
+chmod 1777 dev/shm
+
+# Disable screen dimming (TODO: daemon script to poke it instead)
+initctl stop powerd 2>/dev/null || nopowerd=1
+
+# Start the chroot and any specified command
+{ env -i TERM="$TERM" chroot . $cmd "$@"; ret=$?; } || true
+
+# Post-run; clean up
+[ "$nopowerd" ] || initctl start powerd
+eval "$umount"
+exit $ret
diff --git a/make-chroot.sh b/make-chroot.sh
new file mode 100755
index 000000000..bdd370de1
--- /dev/null
+++ b/make-chroot.sh
@@ -0,0 +1,145 @@
+#!/bin/sh -e
+# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+if [ $# = 0 ]; then
+    echo "Usage: %{0##*/} user@hostname [release]" 1>&2
+    echo "${0##*/} requires SSH access to a Debian-based system to boostrap." 1>&2
+    exit 2
+fi
+if [ ! "$USER" = root -a ! "$UID" = 0 ]; then
+    echo "${0##*/} must be run as root." 1>&2
+    exit 2
+fi
+
+RELEASE="${2:-precise}"
+MIRROR='http://archive.ubuntu.com/ubuntu/'
+
+ARCH="`uname -m | sed -e 's/x86_64/amd64/' -e 's/arm.*/arm/'`"
+
+CHROOT="$RELEASE"
+if grep -q 'CHROMEOS' '/etc/lsb-release'; then
+    DESTDIR="/usr/local"
+else
+    DESTDIR="chroot"
+fi
+
+echo "Installing $RELEASE chroot to $DESTDIR/$CHROOT" 1>&2
+if [ ! -w "$DESTDIR" ]; then
+    echo "You do not have write access to $DESTDIR." 1>&2
+    exit 2
+fi
+mkdir -p "$DESTDIR"
+oldpwd="$PWD"
+cd "$DESTDIR"
+
+echo "Bootstrapping using ssh $1" 1>&2
+
+tmp="`mktemp --tmpdir=/tmp make-chroot.XXX`"
+trap "rm -f \"$tmp\"" INT HUP 0
+
+while true; do
+ssh $1 sh -ec \''
+if ! hash debootstrap; then
+    echo 'needsinstall'
+    exit
+fi
+tmp="`mktemp -d --tmpdir=/tmp make-chroot.XXX`"
+trap "rm -rf \"$tmp\"" INT HUP 0
+cd "$tmp"
+fakeroot debootstrap --foreign --arch="'"$ARCH"'" "'"$RELEASE"'" "'"$CHROOT"'" "'"$MIRROR"'" 1>&2
+echo -n "Compressing and downloading chroot environment..." 1>&2
+fakeroot tar --checkpoint=100 --checkpoint-action=exec="echo -n . 1>&2" -cajf- "'"$CHROOT"'"
+'\' > "$tmp"
+
+if head -n 1 "$tmp" | grep -q needsinstall; then
+    echo 'debootstrap must be installed to prepare the chroot environment.' 1>&2
+    ssh -t $1 sudo apt-get install debootstrap
+else
+    break
+fi
+done
+
+echo 'done' 1>&2
+echo 'Unpacking chroot environment...' 1>&2
+tar -xf "$tmp"
+rm -f "$tmp"
+trap - INT HUP 0
+
+echo 'Preparing chroot environment...' 1>&2
+echo -n 'Specify a new user: ' 1>&2
+read user junk
+enterchroot="${0%/*}/enter-chroot.sh"
+preparescript="$CHROOT/prepare-chroot.sh"
+cat > "$preparescript" <<EOF
+#!/bin/sh -e
+export PATH='/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin'
+
+[ -r /debootstrap ] && /debootstrap/debootstrap --second-stage
+dpkg-reconfigure tzdata
+if ! grep -q "^$user" /etc/sudoers; then
+    adduser "$user" && echo "$user ALL=(ALL:ALL) ALL" >> /etc/sudoers
+fi
+
+echo 'Preparing software sources' 1>&2
+cat > /etc/apt/sources.list <<EOFEOF
+deb $MIRROR $RELEASE main restricted universe multiverse
+deb-src $MIRROR $RELEASE main restricted universe multiverse
+deb $MIRROR $RELEASE-updates main restricted universe multiverse
+deb-src $MIRROR $RELEASE-updates main restricted universe multiverse
+deb $MIRROR $RELEASE-security main restricted universe multiverse
+deb-src $MIRROR $RELEASE-security main restricted universe multiverse
+EOFEOF
+apt-get -y update
+
+echo 'Ensuring system is up-to-date' 1>&2
+apt-get -y upgrade
+
+echo 'Installing additional packages' 1>&2
+apt-get -y install wget openssh-client xorg gdebi chromium-browser
+# Fix launching X11 from inside crosh
+sed -i 's/allowed_users=.*/allowed_users=anybody/' '/etc/X11/Xwrapper.config'
+# Ensure X always starts on display :1
+cat > /usr/local/bin/xinit <<EOFEOF
+#!/bin/sh
+dash=--
+for x in "\\\$@"; do
+    if [ "\\\$x" = -- ]; then
+        dash=
+        break
+    fi
+done
+exec /usr/bin/xinit "\\\$@" \\\$dash :1
+EOFEOF
+chmod a+rx /usr/local/bin/xinit
+# Add a blank Xauthority
+touch /home/$user/.Xauthority
+chown $user:$user /home/$user/.Xauthority
+chmod 600 /home/$user/.Xauthority
+# Set sudo mode for gksu
+su - $user -c 'gconftool -t b -s /apps/gksu/sudo-mode t'
+
+echo 'You do not yet have a desktop environment installed.' 1>&2
+echo -n 'Would you like to install Xfce? [y/N] '
+read response junk
+if [ "\$response" = y -o "\$response" = yes ]; then
+    apt-get -y install xfce4 xfce4-goodies shimmer-themes dictionaries-common-
+fi
+
+echo 'Cleaning up' 1>&2
+apt-get clean
+rm "\$0"
+EOF
+chmod +x "$preparescript"
+cd "$oldpwd"
+while ! "$enterchroot" "$CHROOT" "/${preparescript##*/}"; do
+    echo "Running /${preparescript##*/} inside the chroot failed." 1>&2
+    echo "Will re-attempt in 5 seconds, or you can ctrl-C and run it yourself." 1>&2
+    echo "This is the last step in setting up the chroot." 1>&2
+    sleep 5
+done
+
+echo "Done! You can enter the chroot using $enterchroot $CHROOT" 1>&2
+echo "If you installed Xfce, you can quickly start it from outside the chroot" 1>&2
+echo "by running ${0%/*}/startxfce4.sh" 1>&2
diff --git a/startxfce4.sh b/startxfce4.sh
new file mode 100755
index 000000000..40df7395a
--- /dev/null
+++ b/startxfce4.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This is an simple script using enter-chroot.sh to start an Xfce session.
+# You should enter the chroot and install xfce before running this.
+#    sudo apt-get install xfce4 xfce4-goodies shimmer-themes
+# (xfce4-goodies and shimmer-themes are optional.)
+
+exec "${0%/*}/enter-chroot.sh" "${1:-precise}" 1000 startxfce4