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   1 #!/bin/sh
   2 #
   3 # The use of this script for Totally Automating Tape usage is
   4 #   described in the Tips chapter of the manual.
   5 #
   6 # Bacula interface to mtx autoloader
   7 #
   8 #   Created  OCT/31/03 by Alexander Kuehn, derived from Ludwig Jaffe's script
   9 #
  10 #  Works with the HP C1537A L708 DDS3
  11 #
  12 #set -x
  13 # these are the labels of the tapes in each virtual slot, not the slots!
  14 labels="PSE-0001 PSE-0002 PSE-0003 PSE-0004 PSE-0005 PSE-0006 PSE-0007 PSE-0008 PSE-0009 PSE-0010 PSE-0011 PSE-0012"
  15
  16 # who to send a mail to?
  17 recipient=root@localhost
  18 logfile=/var/log/mtx.log
  19
  20 # Delay in seconds how often to check whether a new tape has been inserted
  21 TAPEDELAY=10    # the default is every 10 seconds
  22 echo `date` ":" $@ >>$logfile
  23
  24 # change this if mt is not in the path (use different quotes!)
  25 mt=`which mt`
  26 grep=`which grep`
  27 #
  28 # how to run the console application?
  29 console="/usr/local/sbin/console -c /usr/local/etc/console.conf"
  30
  31 command="$1"
  32
  33 #TAPEDRIVE0 holds the device/name of your 1st and only drive (Bacula supports only 1 drive currently)
  34 #Read TAPEDRIVE from command line parameters
  35 if [ -z "$2" ] ; then
  36   TAPEDRIVE0=/dev/nsa0
  37 else
  38   TAPEDRIVE0=$2
  39 fi
  40
  41 #Read slot from command line parameters
  42 if [ -z "$3" ] ; then
  43   slot=`expr 1`
  44 else
  45   slot=`expr $3`
  46 fi
  47
  48 if [ -z "$command" ] ; then
  49   echo ""
  50   echo "The mtx-changer script for Bacula"
  51   echo "---------------------------------"
  52   echo ""
  53   echo "usage: mtx-changer <command> <devicename of tapedrive> [slot]"
  54   echo "       mtx-changer"
  55   echo ""
  56   echo "Valid commands:"
  57   echo ""
  58   echo "unload          Unloads a tape into the slot"
  59   echo "                from where it was loaded."
  60   echo "load <slot>     Loads a tape from the slot <slot>"
  61   echo "list            Lists full storage slots"
  62   echo "loaded          Gives slot from where the tape was loaded."
  63   echo "                0 means the tape drive is empty."
  64   echo "slots           Gives Number of avialable slots."
  65   echo "volumes         List avialable slots and the label of the."
  66   echo "                tape in it (slot:volume)"
  67   echo "Example:"
  68   echo "  mtx-changer load /dev/nst0 1   loads a tape from slot1"
  69   echo "  mtx-changer %a %o %S   "
  70   echo ""
  71   exit 0
  72 fi
  73
  74
  75 case "$command" in
  76         unload)
  77                 # At first do mt -f /dev/st0 offline to unload the tape
  78                 #
  79                 # Check if you want to fool me
  80                 echo "unmount"|$console >/dev/null 2>/dev/null
  81                 echo "mtx-changer: Checking if drive is loaded before we unload. Request unload" >>$logfile
  82                 if $mt -f $TAPEDRIVE0 status >/dev/null 2>/dev/null ; then              # mt says status ok
  83                         echo "mtx-changer: Doing mt -f $TAPEDRIVE0 rewoffl to rewind and unload the tape!" >>$logfile
  84                         $mt -f $TAPEDRIVE0 rewoffl
  85                 else
  86                         echo "mtx-changer:  *** Don't fool me! *** The Drive $TAPEDRIVE0 is empty." >>$logfile
  87                 fi
  88                 exit 0
  89                 ;;
  90
  91    load)
  92                 #Let's check if drive is loaded before we load it
  93                 echo "mtx-changer: Checking if drive is loaded before we load. I Request loaded" >>$logfile
  94                 LOADEDVOL=`echo "status Storage"|$console|$grep $TAPEDRIVE0|grep ^Device|grep -v "not open."|grep -v "ERR="|grep -v "no Bacula volume is mounted"|sed -e s/^.*Volume\ //|cut -d\" -f2`
  95 #               if [ -z "$LOADEDVOL" ] ; then   # this is wrong, becaus Bacula would try to use the tape if we mount it!
  96 #                       LOADEDVOL=`echo "mount"|$console|$grep $TAPEDRIVE0|grep Device|grep -v "not open."|grep -v "ERR="|sed -e s/^.*Volume\ //|cut -d\" -f2`
  97 #                       if [ -z "$LOADEDVOL" ] ; then
  98 #                               echo "mtx-changer: The Drive $TAPEDRIVE0 is empty." >>$logfile
  99 #                       else                                                    # restore state?
 100 #                               if [ $LOADEDVOL = $3 ] ; then           # requested Volume mounted -> exit
 101 #                                       echo "mtx-changer: *** Don't fool me! *** Tape $LOADEDVOL is already in drive $TAPEDRIVE0!" >>$logfile
 102 #                                       exit
 103 #                               else                                    # oops, wrong volume
 104 #                                       echo "unmount"|$console >/dev/null 2>/dev/null
 105 #                               fi
 106 #                       fi
 107 #               fi
 108                 if [ -z "$LOADEDVOL" ] ; then
 109                         echo "unmount"|$console >/dev/null 2>/dev/null
 110                         LOADEDVOL=0
 111                 else
 112                         #Check if you want to fool me
 113                         if [ $LOADEDVOL = $3 ] ; then
 114                                 echo "mtx-changer: *** Don't fool me! *** Tape $LOADEDVOL is already in drive $TAPEDRIVE0!" >>$logfile
 115                                 exit
 116                         fi
 117                         echo "mtx-changer: The Drive $TAPEDRIVE0 is loaded with the tape $LOADEDVOL" >>$logfile
 118                         echo "mtx-changer: Unmounting..." >>$logfile
 119                         echo "unmount"|$console >/dev/null 2>/dev/null
 120                 fi
 121                 echo "mtx-changer: Unloading..." >>$logfile
 122                 echo "mtx-changer: Doing mt -f $TAPEDRIVE0 rewoffl to rewind and unload the tape!" >>$logfile
 123                 mt -f $TAPEDRIVE0 rewoffl 2>/dev/null
 124                 #Now we can load the drive as desired
 125                 echo "mtx-changer: Doing mtx -f $1 $2 $3" >>$logfile
 126                 # extract label for the mail
 127                 count=`expr 1`
 128                 for label in $labels ; do
 129                         if [ $slot -eq $count ] ; then volume=$label ; fi
 130                         count=`expr $count + 1`
 131                 done
 132
 133                 mail -s "Bacula needs volume $volume." $recipient <<END_OF_DATA
 134 Please insert volume $volume from slot $slot into $TAPEDRIVE0 .
 135 Kind regards,
 136 Bacula.
 137 END_OF_DATA
 138                 sleep 15
 139                 $mt status >/dev/null 2>/dev/null
 140                 while [ $? -ne 0 ] ; do
 141                         sleep $TAPEDELAY
 142                         $mt status >/dev/null 2>/dev/null
 143                 done
 144                 mail -s "Bacula says thank you." $recipient <<END_OF_DATA
 145 Thank you for inserting the new tape! (I requested volume $volume from slot $slot.)
 146 Kind regards,
 147 Bacula.
 148 END_OF_DATA
 149                 echo "Successfully loaded a tape into drive $TAPEDRIVE0 (requested $volume from slot $slot)." >>$logfile
 150                 echo "Loading finished." ; >>$logfile
 151                 echo "$slot"
 152                 exit 0
 153                 ;;
 154
 155         list)
 156                 echo "mtx-changer: Requested list" >>$logfile
 157                 LOADEDVOL=`echo "status Storage"|$console|$grep $TAPEDRIVE0|grep ^Device|grep -v "not open."|grep -v "ERR="|grep -v "no Bacula volume is mounted"|sed -e s/^.*Volume\ //|cut -d\" -f2`
 158                 if [ -z $LOADEDVOL ] ; then             # try mounting
 159                         LOADEDVOL=`echo "mount"|$console|$grep $TAPEDRIVE0|grep Device|grep -v "not open."|grep -v "ERR="|sed -e s/^.*Volume\ //|cut -d\" -f2`
 160                         if [ -z $LOADEDVOL ] ; then             # no luck
 161                                 LOADEDVOL="_no_tape"
 162                         else                                                    # restore state
 163                                 echo "unmount"|$console >/dev/null 2>/dev/null
 164                         fi
 165                 fi
 166                 count=`expr 1`
 167                 for label in $labels ; do
 168                         if [ "$label" != "$LOADEDVOL" ] ; then
 169                                 printf "$count "
 170                         fi
 171                         count=`expr $count + 1`
 172                 done
 173                 printf "\n"
 174       ;;
 175
 176    loaded)
 177                 echo "mtx-changer: Request loaded, dev $TAPEDRIVE0" >>$logfile
 178                 LOADEDVOL=`echo "status Storage"|$console|$grep $TAPEDRIVE0|grep ^Device|grep -v "not open."|grep -v "ERR="|grep -v "no Bacula volume is mounted"|sed -e s/^.*Volume\ //|cut -d\" -f2`
 179                 if [ -z $LOADEDVOL ] ; then
 180                         LOADEDVOL=`echo "mount"|$console|$grep $TAPEDRIVE0|grep Device|grep -v "not open."|grep -v "ERR="|grep -v "no Bacula volume is mounted"|sed -e s/^.*Volume\ //|cut -d\" -f2`
 181                         if [ -z "$LOADEDVOL" ] ; then           # no luck
 182                                 echo "$TAPEDRIVE0 not mounted!" >>$logfile
 183                         else                                                    # restore state
 184                                 echo "unmount"|$console >/dev/null 2>/dev/null
 185                         fi
 186                 fi
 187                 if [ -z "$LOADEDVOL" ] ; then
 188                         LOADEDVOL="_no_tape" >>$logfile
 189                         echo "0"
 190                 else
 191                         count=`expr 1`
 192                         for label in $labels ; do
 193                                 if [ $LOADEDVOL = $label ] ; then echo $count ; fi
 194                                 count=`expr $count + 1`
 195                         done
 196                 fi
 197                 exit 0
 198                 ;;
 199
 200    slots)
 201                 echo "mtx-changer: Request slots" >>$logfile
 202                 count=`expr 0`
 203                 for label in $labels ; do
 204                         count=`expr $count + 1`
 205                 done
 206                 echo $count
 207       ;;
 208
 209    volumes)
 210                 echo "mtx-changer: Request volumes" >>$logfile
 211                 count=`expr 1`
 212                 for label in $labels ; do
 213                         printf "$count:$label "
 214                         count=`expr $count + 1`
 215                 done
 216                 printf "\n"
 217       ;;
 218 esac