#!/bin/sh

### BEGIN INIT INFO
# Provides:		live-initramfs
# 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:	live-initramfs 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-initramfs
SCRIPTNAME=/etc/init.d/${NAME}
DO_SNAPSHOT=/sbin/live-snapshot

# Exit if system was not booted by live-initramfs
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
}

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

    for path in $(which halt) $(which reboot) /etc/rc?.d /etc/default; do
        cache_path "$path"
    done

    for x in $(cat /proc/cmdline); do
	case $x in
	    quickreboot)
		QUICKREBOOT="Yes"
	    ;;
	esac
    done

    if [ -z ${QUICKREBOOT} ]; then
	if [ -x /usr/bin/eject ]
	then
		eject -p -m /live/image >/dev/null 2>&1
	fi

	# XXX - i18n
	echo "Please remove the disc and close the tray (if any) then press ENTER: "
	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
    fi
}

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