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#!/bin/sh
# This script dumps the specified Filesystem via dump on a CD/DVD
# DISK_CAPACITY defines the capacity in MB per disk.
# The script's own name $0 is passed via the -F option of dump
# When using cdrecord/dvdrecord and at least for my DVD-Recorder (a PHILIPS
# DVR-A03) it is necessary to define the tracksize for the next track before
# the DVD is written. This is done via the -tsize option of cdrecord. Since
# tsize takes its arguments in Bytes, the shell cannot compute the value
# correctly anymore (value too high), so I use bc.
# Set this to 4300 for DVD and 650 or 700 for CD
#DISK_CAPACITY=10 # testing
#DISK_CAPACITY=650
DISK_CAPACITY=4300
BSIZE="$(echo "$DISK_CAPACITY*1024" | bc -l )"
TSIZE="$(echo "$DISK_CAPACITY*1024*1024" | bc -l )"
# This is used for testing
#RECORD_BIN="dd of=/dev/null bs=1k if="
# This is for writing to CD with cdrtools, this uses track-at-once mode
# in case cdrtools does not support disk-at-once with your burner
#RECORD_BIN="/usr/bin/cdrecord dev=0,0,0 fs=64M speed=2 -eject -tao -pad -tsize=$TSIZE -data "
# This is for writing to DVD with cdrtools with DVD support, this has to
# use disk-at-once mode.
#RECORD_BIN="/usr/bin/cdrecord dev=0,0,0 fs=64M speed=2 -eject -dao -pad -tsize=$TSIZE -data "
# This is for writing to DVD with growisofs
RECORD_BIN="/usr/bin/growisofs -Z /dev/dvd="
FIFO="/tmp/dump.$$.fifo"
DUMP="/sbin/dump"
cleanup() {
rm -f $FIFO
}
error_exit() {
retcode=$?
echo >&2 "Error $retcode: exiting"
exit $retcode
}
trap error_exit ERR
write_output() {
# supplied info from "dump -F":
# $1 = filename
# $2 = sequence number
echo "Please insert disk No. $(($2+1))"
ANSWER=""
while [ "$ANSWER" != "y" ] ; do
echo -n "Is the disk ready? (y/n) "
read </dev/tty ANSWER
if [ "$ANSWER" == "y" ] ; then
(${RECORD_BIN}${1}) &
return 0
elif [ "$ANSWER" == "n" ] ; then
EXIT=""
echo -n "Do you really want to exit? (y/n) "
read </dev/tty EXIT
if [ "$EXIT" == "y" ] ; then
return 1
fi
fi
done
}
if [ "$#" = "0" ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
echo >&2 "Usage: $0 <dump options>"
echo >&2 "See 'man dump' for dump options"
echo >&2 "the dump options -F -f -B are not required and are overridden"
exit 1
fi
set -m # We need proper job control
if [ "$#" = "2" ] && [ -p "$1" ]; then
write_output "$@" || (kill $$ >/dev/null 2>&1; exit 1)
exit 0
else
mkfifo $FIFO
trap cleanup EXIT
if write_output "$FIFO" "0"; then
if $DUMP "$@" -F "$0" -f "$FIFO" -B$BSIZE; then
echo "Waiting for background writing process to complete"
wait % # Wait for the background writing process
else
kill % >/dev/null 2>&1 # or kill it
exit 1
fi
exit 0
else
kill % >/dev/null 2>&1 # Kill the background writing process
exit 1
fi
fi
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