~ubuntu-core-dev/casper/trunk

#! /bin/sh

### BEGIN INIT INFO

# Provides:          casper

# Required-Start:    $syslog

# Required-Stop:     $syslog

# Should-Start:      $local_fs

# Should-Stop:       $local_fs

# Default-Start:     1 2 3 4 5

# Default-Stop:      0 6

# Short-Description: Casper init script

# Description:       Resyncs snapshots, evantually caches files in order

#                    to let remove the media.

### END INIT INFO

# Author: Tollef Fog Heen <tfheen@canonical.com>

#         Marco Amadori <marco.amadori@gmail.com>

#

PATH=/usr/sbin:/usr/bin:/sbin:/bin

NAME=casper

SCRIPTNAME=/etc/init.d/${NAME}

DO_SNAPSHOT=/sbin/${NAME}-snapshot

# Exit if system was not booted by casper

grep -qs boot=casper /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/$NAME.conf ] && . /etc/$NAME.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

}

do_stop ()

{

    if [ ! -z "${ROOTSNAP}" ]; then

        $DO_SNAPSHOT --resync-string="${ROOTSNAP}"

    fi

    if [ ! -z "${HOMESNAP}" ]; then

        $DO_SNAPSHOT --resync-string="${HOMESNAP}"

    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

    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); do

        cache_path "$path"

    done

    eject -p -m /cdrom >/dev/null 2>&1

    [ "$prompt" ] || return 0

    stty sane < /dev/console

    # XXX - i18n

    echo "Please remove the disc and close the tray (if any) then press ENTER: " > /dev/console

    if [ -x /sbin/usplash_write ]; then

        /sbin/usplash_write "TIMEOUT 86400"

        /sbin/usplash_write "TEXT-URGENT Please remove the disc, close the tray (if any)"

        /sbin/usplash_write "TEXT-URGENT and press ENTER to continue"

    fi

    read x < /dev/console

}

case "$1" in

    start|restart|reload|force-reload|status)

        [ "$VERBOSE" != no ] && 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

        ;;

    *)

        log_success_msg "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2

        exit 3

        ;;

esac