diff options
Diffstat (limited to 'casper')
-rw-r--r-- | casper | 115 |
1 files changed, 115 insertions, 0 deletions
@@ -0,0 +1,115 @@ +#! /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 |