--- /dev/null
+#! @SHELL@
+#
+# Amanda, The Advanced Maryland Automatic Network Disk Archiver
+# Copyright (c) 1991-1999 University of Maryland at College Park
+# All Rights Reserved.
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation, and that the name of U.M. not be used in advertising or
+# publicity pertaining to distribution of the software without specific,
+# written prior permission. U.M. makes no representations about the
+# suitability of this software for any purpose. It is provided "as is"
+# without express or implied warranty.
+#
+# U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
+# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+# Author: James da Silva, Systems Design and Analysis Group
+# Computer Science Department
+# University of Maryland at College Park
+#
+
+#
+# chg-multi.sh - generic tape changer script
+#
+
+# source utility functions and values from configure
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+amlibexecdir=@amlibexecdir@
+. ${amlibexecdir}/chg-lib.sh
+
+pname="chg-multi"
+
+if [ -d "@AMANDA_DBGDIR@" ]; then
+ logfile=@AMANDA_DBGDIR@/changer.debug
+else
+ logfile=/dev/null
+fi
+
+echo `_ "arguments ->"` "$@" >> $logfile
+
+ourconf=`amgetconf changerfile`
+
+if ! error=try_find_mt; then
+ echo <none> $error
+ exit 2
+fi
+
+EXPR=expr
+# EXPR=/usr/local/bin/expr # in case you need a more powerful expr...
+
+# read in some config parameters
+
+if [ ! -f "$ourconf" ]; then
+ answer=`_ '<none> %s: %s does not exist' "$pname" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+fi
+
+firstslot=`awk '$1 == "firstslot" {print $2}' $ourconf 2>/dev/null`
+if [ -z "$firstslot" ]; then
+ answer=`_ '<none> %s: firstslot not specified in %s' "$pname" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+fi
+
+lastslot=`awk '$1 == "lastslot" {print $2}' $ourconf 2>/dev/null`
+if [ -z "$lastslot" ]; then
+ answer=`_ '<none> %s: lastslot not specified in %s' "$pname" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+fi
+
+nslots=`$EXPR $lastslot - $firstslot + 1`
+
+gravity=`awk '$1 == "gravity" {print $2}' $ourconf 2>/dev/null`
+if [ -z "$gravity" ]; then
+ answer=`_ '<none> %s: gravity not specified in %s' "$pname" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+fi
+
+needeject=`awk '$1 == "needeject" {print $2}' $ourconf 2>/dev/null`
+if [ -z "$needeject" ]; then
+ answer=`_ '<none> %s: needeject not specified in %s' "$pname" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+fi
+
+multieject=`awk '$1 == "multieject" {print $2}' $ourconf 2>/dev/null`
+if [ -z "$multieject" ]; then
+ echo `_ 'Note: setting multieject to a default of zero'` >> $logfile
+ multieject=0
+fi
+
+ejectdelay=`awk '$1 == "ejectdelay" {print $2}' $ourconf 2>/dev/null`
+if [ -z "$ejectdelay" ]; then
+ echo `_ 'Note: setting ejectdelay to a default of zero'` >> $logfile
+ ejectdelay=0
+fi
+
+posteject=`awk '$1 == "posteject" {print $2}' $ourconf 2>/dev/null`
+if [ -z "$posteject" ]; then
+ echo `_ 'Note: setting posteject to a default of "true"'` >> $logfile
+ posteject=true
+fi
+
+ourstate=`awk '$1 == "statefile" {print $2}' $ourconf 2>/dev/null`
+if [ -z "$ourstate" ]; then
+ answer=`_ '<none> %s: statefile not specified in %s' "$pname" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+fi
+
+# needeject and multieject are incompatible
+if [ $needeject -eq 1 ] && [ $multieject -eq 1 ] ; then
+ answer=`_ '<none> %s: needeject and multieject cannot be both enabled in %s' "$pname" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+fi
+
+# read in state: only curslot and curloaded at the present time
+
+curslot=`awk '$1 == "curslot" {print $2}' $ourstate 2>/dev/null`
+if [ -z "$curslot" ]; then
+ curslot=$firstslot
+fi
+
+curloaded=`awk '$1 == "curloaded" {print $2}' $ourstate 2>/dev/null`
+if [ -z "$curloaded" ]; then
+ curloaded=0
+fi
+
+
+# process the command-line
+
+# control vars to avoid code duplication: not all shells have functions!
+usage=0
+checkgravity=0
+ejectslot=0
+loadslot=0
+slotempty=0
+ejectonly=0
+
+if [ $# -ge 1 ]; then command=$1; else command="-usage"; fi
+
+case "$command" in
+
+-info) # return basic information about changer
+
+ backwards=`$EXPR 1 - $gravity`
+ answer="$curslot $nslots $backwards"
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 0
+ ;;
+
+-reset) # reset changer. Actually, we only reset changer state. We
+ # trust that the operator has reloaded a stack and reset the
+ # hardware. In most cases, we do not want to actually do
+ # anything: if the operator has done something with the
+ # hardware, we have no way to know what the actual current
+ # slot is. If the hardware state has not changed, and what is
+ # really wanted is to load the first slot, use "slot first"
+ # instead
+
+ checkgravity=0
+ loadslot=1
+ newslot=$firstslot
+ curslot=$firstslot
+ # XXX put changer-specific reset here, if applicable
+ ;;
+
+-eject) # eject tape if loaded. Note that if multieject is set, this
+ # only can make sense if the position is last and gravity 1
+
+ checkgravity=0
+ loadslot=0
+ newslot=$curslot
+ ejectslot=1
+ ejectonly=1
+ if [ $multieject -eq 1 ] && \
+ ([ $gravity -eq 0 ] || [ $curslot -ne $lastslot ]) ; then
+ # Can't do this: if we eject, the stacker is going to
+ # load the next tape, and our state will be botched
+ answer=`_ '%s %s: Cannot use -eject with multieject/nogravity/notlastslot' "$curslot" "$pname"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 1
+ fi
+ if [ $curloaded -eq 0 ]; then
+ answer=`_ '%s %s: slot already empty' "$curslot" "$pname"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 1
+ fi
+ ;;
+
+-slot) # change to slot
+
+ checkgravity=1
+ loadslot=1
+
+ slotparm=$2
+ case "$slotparm" in
+ [0-9]*)
+ newslot=$slotparm
+ if [ $newslot -gt $lastslot ] || \
+ [ $newslot -lt $firstslot ] ; then
+ answer=`_ '%s %s: no slot %s: legal range is %s ... %s' "$newslot" "$pname" "$newslot" "$firstslot" "$lastslot"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 1
+ fi
+ ;;
+ current)
+ newslot=$curslot
+ ;;
+ first)
+ newslot=$firstslot
+ ;;
+ last)
+ newslot=$lastslot
+ ;;
+ next|advance)
+ newslot=`$EXPR $curslot + 1`
+ if [ $newslot -gt $lastslot ]; then
+ newslot=$firstslot
+ fi
+ if [ $slotparm = advance ]; then
+ loadslot=0
+ fi
+ ;;
+ prev)
+ newslot=`$EXPR $curslot - 1`
+ if [ $newslot -lt $firstslot ]; then
+ newslot=$lastslot
+ fi
+ ;;
+ *)
+ answer=`_ '<none> %s: bad slot name "%s"' "$pname" "$slotparm"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 1
+ ;;
+ esac
+ ;;
+*)
+ usage=1
+ ;;
+esac
+
+
+if [ $usage -eq 1 ]; then
+ answer=`_ '<none> usage: %s {-reset | -slot [<slot-number>|current|next|prev|advance] | -info | -eject}' "$pname"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+fi
+
+
+# check for legal move
+
+if [ $checkgravity -eq 1 ] && [ $gravity -ne 0 ] ; then
+ if [ $newslot -lt $curslot ] || [ "$slotparm" = "prev" ] ; then
+ answer=`_ '%s %s: cannot go backwards in gravity stacker' "$newslot" "$pname"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 1
+ fi
+fi
+
+# Do the 'mt offline' style of stacker control if applicable
+if [ $multieject -eq 1 ] && [ $loadslot -eq 1 ] && [ $newslot -ne $curslot ]
+then
+ # XXX put changer-specific load command here, if applicable
+
+ curloaded=0 # unless something goes wrong
+ slotempty=0
+
+ while [ $curslot -ne $newslot ]; do
+ device=`awk '$1 == "slot" && $2 == '$curslot' {print $3}' $ourconf 2>/dev/null`
+ if [ "$device" = "" ]; then
+ answer=`_ '%s %s: slot %s device not specified in %s' "$curslot" "$pname" "$curslot" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+ fi
+ echo `_ ' -> offline'` "$device" >> $logfile
+ if ! try_eject_device $device; then
+ answer=`_ '%s %s: %s: unable to change to slot %s' "$newslot" "$pname" "$device" "$curslot"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+ fi
+ [ $ejectdelay -gt 0 ] && sleep $ejectdelay
+ echo `_ ' -> running'` $posteject $device >> $logfile
+ $posteject $device >> $logfile 2>&1
+ status=$?
+ if [ $status -ne 0 ]; then
+ answer=`_ '%s %s: %s %s failed: %s' "$newslot" "$pname" "$posteject" "$device" "$status"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+ fi
+ curslot=`$EXPR $curslot + 1`
+ if [ $curslot -gt $lastslot ] ; then
+ curslot=$firstslot
+ fi
+ done
+fi
+
+if [ $ejectonly -eq 1 ] \
+ || ([ $needeject -eq 1 ] \
+ && [ $loadslot -eq 1 ] \
+ && [ $curloaded -eq 1 ] \
+ && [ $newslot -ne $curslot ])
+then
+ # XXX put changer-specific load command here, if applicable
+
+ curloaded=0 # unless something goes wrong
+ slotempty=0
+
+ # try to unload the current device
+ device=`awk '$1 == "slot" && $2 == '$curslot' {print $3}' $ourconf 2>/dev/null`
+ if [ "$device" = "" ]; then
+ answer=`_ '%s %s: slot %s device not specified in %s' "$curslot" "$pname" "$curslot" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+ fi
+ echo `_ ' -> offline'` $device >> $logfile
+ try_eject_device $device
+ if [ $? -ne 0 ]; then
+ #
+ # XXX if the changer-specific eject command can distinguish
+ # betweeen "slot empty" and more serious errors, return 1
+ # for the first case, 2 for the second case. Generically,
+ # we just presume an error signifies an empty slot.
+ #
+ slotempty=1
+ else
+ [ $ejectonly -eq 0 ] && [ $ejectdelay -gt 0 ] && sleep $ejectdelay
+ echo `_ ' -> running '` $posteject $device >> $logfile
+ $posteject $device >> $logfile 2>&1
+ status=$?
+ if [ $status -ne 0 ]; then
+ answer=`_ '%s %s: %s %s failed: %s' "$newslot" "$pname" "$posteject" "$device" "$status"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+ fi
+ fi
+fi
+
+if [ $loadslot -eq 1 ]; then # load the tape from the slot
+
+ # XXX put changer-specific load command here, if applicable
+
+ curloaded=1 # unless something goes wrong
+ slotempty=0
+ curslot=$newslot
+
+ # try to rewind the device
+ device=`awk '$1 == "slot" && $2 == '$curslot' {print $3}' $ourconf 2>/dev/null`
+ if [ "$device" = "" ]; then
+ answer=`_ '%s %s: slot %s device not specified in %s' "$curslot" "$pname" "$curslot" "$ourconf"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 2
+ fi
+ amdevcheck_status $device
+ if [ $? -ne 0 ]; then
+ #
+ # XXX if the changer-specific load command can distinguish
+ # betweeen "slot empty" and more serious errors, return 1
+ # for the first case, 2 for the second case. Generically,
+ # we just presume an error signifies an empty slot.
+ #
+ slotempty=1
+ curloaded=0
+ fi
+fi
+
+# update state
+
+echo `_ '# multi-changer state cache: DO NOT EDIT!'` > $ourstate
+echo curslot $newslot >> $ourstate
+echo curloaded $curloaded >> $ourstate
+
+# return slot info
+
+if [ $slotempty -eq 1 ]; then
+ answer=`_ '%s %s: slot is empty' "$newslot" "$pname"`
+ echo `_ 'Exit ->'` $answer >> $logfile
+ echo $answer
+ exit 1
+fi
+
+if [ "$command" = -slot -a "$slotparm" = advance ]; then
+ device=/dev/null
+fi
+
+answer="$newslot $device"
+echo `_ 'Exit ->'` $answer >> $logfile
+echo $answer
+exit 0
projects / debian / amanda / blobdiff