#!/bin/sh # # Bacula interface to mtx autoloader # # $Id$ # # If you set in your Device resource # # Changer Command = "path-to-this-script/mtx-changer" %c %o %S %a %d # you will have the following input to this script: # # So Bacula will always call with all the following arguments, even though # in come cases, not all are used. # mtx-changer "changer-device" "command" "slot" "archive-device" "drive-index" # $1 $2 $3 $4 $5 # # for example: # # mtx-changer /dev/sg0 load 1 /dev/nst0 0 (on a Linux system) # # will request to load the first cartidge into drive 0, where # the SCSI control channel is /dev/sg0, and the read/write device # is /dev/nst0. # # If you need to an offline, refer to the drive as $4 # e.g. mt -f $4 offline # # Many changers need an offline after the unload. Also many # changers need a sleep 60 after the mtx load. # # N.B. If you change the script, take care to return either # the mtx exit code or a 0. If the script exits with a non-zero # exit code, Bacula will assume the request failed. # MTX=@MTX@ # Set this to a directory that only the SD can read/write TMPDIR=@working_dir@ # # The purpose of this function to wait a maximum # time for the drive. It will # return as soon as the drive is ready, or after # waiting a maximum of 180 seconds. # Note, this is very system dependent, so if you are # not running on Linux, you will probably need to # re-write it, or at least change the grep target. # wait_for_drive() { i=0 while [ $i -le 180 ]; do # Wait max 180 seconds if mt -f $1 status | grep ONLINE >/dev/null 2>&1; then break fi # echo "Device $1 - not ready, retrying..." sleep 1 i=`expr $i + 1` done } if test $# -lt 2 ; then echo "usage: mtx-changer ctl-device command slot archive-device drive" echo " Insufficient number of arguments arguments given." echo " Mimimum usage is first two arguments ..." exit 1 fi # Setup arguments ctl=$1 cmd="$2" slot=$3 device=$4 # If drive not given, default to 0 if test $# = 5 ; then drive=$5 else drive=0 fi # # Check for special cases where only 2 arguments are needed, # all others are a minimum of 3 case $cmd in loaded) ;; unload) ;; list) ;; slots) ;; *) if test $# -lt 3; then echo "usage: mtx-changer ctl-device command slot archive-device drive" echo " Insufficient number of arguments arguments given." echo " Mimimum usage is first three arguments ..." exit 1 fi ;; esac case $cmd in unload) # echo "Doing mtx -f $ctl unload $slot $drive" # # enable the following line if you need to eject the cartridge # mt -f $device offline if test x$slot = x; then ${MTX} -f $ctl unload else ${MTX} -f $ctl unload $slot $drive fi ;; load) # echo "Doing mtx -f $ctl load $slot $drive" ${MTX} -f $ctl load $slot $drive rtn=$? # # Increase the sleep time if you have a slow device # or remove the sleep and add the following: # wait_for_drive $device sleep 15 exit $rtn ;; list) # echo "Doing mtx -f $ctl -- to list volumes" ${MTX} -f $ctl status >${TMPDIR}/mtx.$$ rtn=$? cat ${TMPDIR}/mtx.$$ | grep " *Storage Element [0-9]*:.*Full" | awk "{print \$3 \$4}" | sed "s/Full *\(:VolumeTag=\)*//" cat ${TMPDIR}/mtx.$$ | grep "^Data Transfer Element [0-9]*:Full (Storage Element [0-9]" | awk '{printf "%s:%s\n",$7,$10}' # # If you have a VXA PacketLoader and the above does not work, try # turning it off and enabling the following line. # ${MTX} -f $ctl status | grep " *Storage Element [0-9]*:.*Full" | sed "s/*Storage Element //" | sed "s/Full :VolumeTag=//" exit $rtn ;; loaded) # echo "Doing mtx -f $ctl $drive -- to find what is loaded" ${MTX} -f $ctl status >${TMPDIR}/mtx.$$ rtn=$? cat ${TMPDIR}/mtx.$$ | grep "^Data Transfer Element $drive:Full" | awk "{print \$7}" cat ${TMPDIR}/mtx.$$ | grep "^Data Transfer Element $drive:Empty" | awk "{print 0}" rm -f ${TMPDIR}/mtx.$$ exit $rtn ;; slots) # echo "Doing mtx -f $ctl -- to get count of slots" ${MTX} -f $ctl status | grep " *Storage Changer" | awk "{print \$5}" ;; esac