diff options
Diffstat (limited to 'debian/live-boot.init')
| -rw-r--r-- | debian/live-boot.init | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/debian/live-boot.init b/debian/live-boot.init new file mode 100644 index 0000000..298295d --- /dev/null +++ b/debian/live-boot.init @@ -0,0 +1,226 @@ +#!/bin/sh + +### BEGIN INIT INFO +# Provides: live-boot +# Required-Start: $syslog +# Required-Stop: +# Should-Start: $local_fs +# Should-Stop: halt reboot +# X-Stop-After: umountroot +# Default-Start: +# Default-Stop: 0 6 +# Short-Description: live-boot init script +# Description: Resyncs snapshots, evantually caches files in order to +# let remove the media. +### END INIT INFO + +# Authors: Tollef Fog Heen <tfheen@canonical.com> +# Marco Amadori <marco.amadori@gmail.com> + +PATH=/usr/sbin:/usr/bin:/sbin:/bin +NAME=live-boot +SCRIPTNAME=/etc/init.d/${NAME} +DO_SNAPSHOT=/sbin/live-snapshot + +# Exit if system was not booted by live-boot +grep -qs boot=live /proc/cmdline || exit 0 + +# Exit if the system was booted from an ISO image rather than a physical CD +grep -qs find_iso= /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 ${QUICKREBOOT} ] + then + # TODO: i18n + BOOT_DEVICE="$(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) + [ "${VERBOSE}" != no ] && log_end_msg 0 + ;; + + start|stop) + log_begin_msg "${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 |