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#!/bin/sh
### BEGIN INIT INFO
# Provides: live-boot
# Required-Start: $syslog bootmisc
# Required-Stop:
# Should-Start: $local_fs
# Should-Stop: halt reboot
# X-Stop-After: umountroot
# Default-Start: S
# Default-Stop: 0 6
# Short-Description: live-boot init script
# Description: Resyncs snapshots, evantually caches files in order to
# let remove the media.
### END INIT INFO
# Authors: Tollef Fog Heen <tfheen@canonical.com>
# Marco Amadori <marco.amadori@gmail.com>
PATH=/usr/sbin:/usr/bin:/sbin:/bin
NAME=live-boot
SCRIPTNAME=/etc/init.d/${NAME}
DO_SNAPSHOT=/sbin/live-snapshot
# Exit if system was not booted by live-boot
grep -qs boot=live /proc/cmdline || exit 0
# Read configuration variable file if it is present
[ -r /etc/live.conf ] && . /etc/live.conf
# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions
# Try to cache everything we're likely to need after ejecting. This
# is fragile and simple-minded, but our options are limited.
cache_path()
{
path="${1}"
if [ -d "${path}" ]
then
find "${path}" -type f | xargs cat > /dev/null 2>&1
elif [ -f "${path}" ]
then
if [ -x "${path}" ]
then
if file "${path}" | grep -q 'dynamically linked'
then
for lib in $(ldd "${path}" | awk '{ print $3 }')
do
cache_path "${lib}"
done
fi
fi
cat "${path}" >/dev/null 2>&1
fi
}
get_boot_device()
{
# search in /proc/mounts for the device that is mounted at /live/image
while read DEVICE MOUNT REST
do
if [ "${MOUNT}" = "/live/image" ]
then
echo "${DEVICE}"
exit 0
fi
done < /proc/mounts
}
device_is_USB_flash_drive()
{
# remove leading "/dev/" and all trailing numbers from input
DEVICE=$(expr substr ${1} 6 3)
# check that device starts with "sd"
[ "$(expr substr ${DEVICE} 1 2)" != "sd" ] && return 1
# check that the device is an USB device
if readlink /sys/block/${DEVICE} | grep -q usb ||
readlink /sys/block/${DEVICE}/device | grep -q usb # linux < 2.6.29
then
return 0
fi
return 1
}
do_stop ()
{
if ! grep -qs nopersistent /proc/cmdline && grep -qs persistent /proc/cmdline
then
if [ ! -z "${ROOTSNAP}" ]
then
${DO_SNAPSHOT} --resync-string="${ROOTSNAP}"
fi
if [ ! -z "${HOMESNAP}" ]
then
${DO_SNAPSHOT} --resync-string="${HOMESNAP}"
fi
fi
# check for netboot
if [ ! -z "${NETBOOT}" ] || grep -qs netboot /proc/cmdline || grep -qsi root=/dev/nfs /proc/cmdline || grep -qsi root=/dev/cifs /proc/cmdline
then
return 0
fi
# Don't prompt to eject the SD card on Babbage board, where we reuse it
# as a quasi-boot-floppy. Technically this uses a bit of ubiquity
# (archdetect), but since this is mostly only relevant for
# installations, who cares ...
if type archdetect >/dev/null 2>&1
then
subarch="$(archdetect)"
case $subarch in
arm*/imx51)
return 0
;;
esac
fi
prompt=1
if grep -qs noprompt /proc/cmdline
then
prompt=
fi
for path in $(which halt) $(which reboot) /etc/rc?.d /etc/default $(which stty) /bin/plymouth /sbin/usplash_write
do
cache_path "${path}"
done
for x in $(cat /proc/cmdline)
do
case ${x} in
quickreboot)
QUICKREBOOT="Yes"
;;
esac
done
if [ -z ${QUICKREBOOT} ]
then
# Exit if the system was booted from an ISO image rather than a physical CD
grep -qs find_iso= /proc/cmdline && return 0
# TODO: i18n
BOOT_DEVICE="$(get_boot_device)"
if device_is_USB_flash_drive ${BOOT_DEVICE}
then
# do NOT eject USB flash drives!
# otherwise rebooting with most USB flash drives
# failes because they actually remember the
# "ejected" state even after reboot
MESSAGE="Please remove the USB flash drive"
else
# ejecting is a very good idea here
MESSAGE="Please remove the disc, close the the tray (if any)"
if [ -x /usr/bin/eject ]
then
eject -p -m /live/image >/dev/null 2>&1
fi
fi
[ "$prompt" ] || return 0
if [ -x /bin/plymouth ] && plymouth --ping
then
plymouth message --text="${MESSAGE} and press ENTER to continue:"
plymouth watch-keystroke > /dev/null
else
stty sane < /dev/console
printf "\n\n${MESSAGE} and press ENTER to continue:" > /dev/console
if [ -x /sbin/usplash_write ]
then
/sbin/usplash_write "TIMEOUT 86400"
/sbin/usplash_write "TEXT-URGENT ${MESSAGE}"
/sbin/usplash_write "TEXT-URGENT and press ENTER to continue"
fi
read x < /dev/console
fi
fi
}
case "${1}" in
restart|reload|force-reload|status)
[ "${VERBOSE}" != no ] && log_end_msg 0
;;
start)
log_begin_msg "${NAME} is configuring sendsigs..."
if [ -f /live/root.pid ] ; then
cat /live/root.pid >> /var/run/sendsigs.omit
fi
log_end_msg 0
;;
stop)
log_begin_msg "${NAME} is resyncing snapshots and caching reboot files..."
do_stop
case "${?}" in
0|1)
[ "${VERBOSE}" != no ] && log_end_msg 0
;;
2)
[ "${VERBOSE}" != no ] && log_end_msg 1
;;
esac
mount -o remount,ro /live/cow
;;
*)
log_success_msg "Usage: ${SCRIPTNAME} {start|stop|restart|force-reload}" >&2
exit 3
;;
esac
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