examples/dump_on_cd_3/dump_disk

   1 #!/bin/sh
   2
   3 # This script dumps the specified Filesystem via dump on a CD/DVD
   4 # DISK_CAPACITY defines the capacity in MB per disk.
   5 # The script's own name $0 is passed via the -F option of dump
   6 # When using cdrecord/dvdrecord and at least for my DVD-Recorder (a PHILIPS
   7 # DVR-A03) it is necessary to define the tracksize for the next track before
   8 # the DVD is written. This is done via the -tsize option of cdrecord. Since
   9 # tsize takes its arguments in Bytes, the shell cannot compute the value
  10 # correctly anymore (value too high), so I use bc.
  11
  12 # If you use growisofs which does not have the 10 second delay before burning
  13 # of cdrecord you may want to uncomment SLEEP="10" to ensure there is data
  14 # waiting on the fifo before burning starts
  15
  16 FIFO="/tmp/dump.$$.fifo"
  17 #DISK_CAPACITY=10       # testing
  18 DISK_CAPACITY=4300
  19 BSIZE="$(echo "$DISK_CAPACITY*1024" | bc -l )"
  20 TSIZE="$(echo "$DISK_CAPACITY*1024*1024" | bc -l )"
  21 #RECORD_BIN="dd of=/dev/null bs=1k if=" # testing
  22 #RECORD_BIN="/usr/bin/dvdrecord dev=0,0,0 fs=64M speed=2 -eject -dao -pad -tsize=$TSIZE -data "
  23 RECORD_BIN="/usr/bin/growisofs -Z /dev/dvd="
  24 SLEEP="10"
  25 DUMP="/sbin/dump"
  26
  27 cleanup() {
  28         rm -f $FIFO
  29 }
  30
  31 error_exit() {
  32         retcode=$?
  33         echo >&2 "Error $retcode: exiting"
  34         exit $retcode
  35 }
  36
  37 trap error_exit ERR
  38
  39 write_output() {
  40         # supplied info from "dump -F":
  41         # $1 = filename
  42         # $2 = sequence number
  43         echo "Please insert disk No. $(($2+1))"
  44         ANSWER=""
  45         while [ "$ANSWER" != "y" ] ; do
  46                 echo -n "Is the disk ready? (y/n) "
  47                 read  </dev/tty ANSWER
  48                 if [ "$ANSWER" == "y" ] ; then
  49                         ([ -n "$SLEEP" ] && sleep $SLEEP; ${RECORD_BIN}${1}) &
  50                         return 0
  51                 elif [ "$ANSWER" == "n" ] ; then
  52                         EXIT=""
  53                         echo -n "Do you really want to exit? (y/n) "
  54                         read </dev/tty EXIT
  55                         if [ "$EXIT" == "y" ] ; then
  56                                 return 1
  57                         fi
  58                 fi
  59         done
  60 }
  61
  62 if [ "$#" = "0" ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
  63         echo >&2 "Usage: $0 <dump options>"
  64         echo >&2 "See 'man dump' for dump options"
  65         echo >&2 "the dump options -F -f -B are not required and are overridden"
  66         exit 1
  67 fi
  68
  69 set -m  # We need proper job control
  70
  71 if [ "$#" = "2" ] && [ -p "$1" ]; then
  72         write_output "$@" || (kill $$ >/dev/null 2>&1; exit 1)
  73         exit 0
  74 else
  75         mkfifo $FIFO
  76         trap cleanup EXIT
  77         if write_output "$FIFO" "0"; then
  78                 if $DUMP "$@" -F "$0" -f "$FIFO" -B$BSIZE; then
  79                         kill % >/dev/null 2>&1  # Kill the background writing process
  80                 else
  81                         wait %                  # Or wait for it to complete
  82                 fi
  83                 exit 0
  84         else
  85                 exit 1
  86         fi
  87 fi