#! /bin/sh
#
# ICEM internal :-)
#

prefix=@prefix@
exec_prefix=@exec_prefix@
sbindir=@sbindir@
libexecdir=@libexecdir@

ConfigDir=@CONFIG_DIR@

PATH=$sbindir:$libexecdir:/usr/bin:/bin:/usr/sbin:/sbin:/usr/ucb
export PATH

Program=`basename $0`

log () {
	echo 1>&2 "$@"
	return 0
}

Config=$1
if [ "$Config" = "" ]; then
	log "usage: ${Program} <config> <volume header>"
	exit 1
fi
VOLHEADER=$2
if [ "$VOLHEADER" = "" ]; then
	log "usage: ${Program} <config> <volume header>"
	exit 1
fi

#
# Check if the configuration directory exists.  Make sure that the
# necessary files can be found, such as amanda.conf and tapelist.
#
if [ ! -d ${ConfigDir}/${Config} ]; then
	log "${Program}: configuration directory ${ConfigDir}/${Config} does not exist."
	exit 1
fi
(cd ${ConfigDir}/${Config} >/dev/null 2>&1) || exit $?
cd ${ConfigDir}/${Config}
if [ ! -r amanda.conf ]; then
	log "${Program}: amanda.conf not found or is not readable in ${ConfigDir}."
	exit 1
fi

# Get the location and name of the tapelist filename.  If tapelist is not
# specified in the amanda.conf file, then use tapelist in the config
# directory.
TapeList=`amgetconf${SUF} tapelist`
if [ ! "$TapeList" ]; then
	TapeList="$ConfigDir/$Config/tapelist"
fi
if [ ! -r $TapeList ]; then
	log "${Program}: $TapeList not found or is not readable."
	exit 1
fi

AllTapeList="${TapeList}.all"

[ ! -f $AllTapeList ] \
	&& echo "no tapelist $AllTapeList found" >&2 \
	&& cat $TapeList | sed 's/^.* //' | sort -u > $AllTapeList \
	&& echo "$AllTapeList created" >&2

cat $TapeList | sed 's/^.* //' > $AllTapeList.n
cat $AllTapeList >> $AllTapeList.n
sort -u $AllTapeList.n > $AllTapeList && rm -f $AllTapeList.n

MAXTAPE=`cat $AllTapeList | sed "s/^$VOLHEADER//" | sort -n | tail -1`
NEXTTAPE=`expr $MAXTAPE + 1`
echo "last Tape is ${VOLHEADER}${MAXTAPE}" >&2

I=1
while [ $I -le $MAXTAPE ]; do
	WRITTEN=`grep "${VOLHEADER}${I}\$" $TapeList`
	EXISTS=`grep "${VOLHEADER}${I}\$" $AllTapeList`
	if [ "$EXISTS" = "" -a "$WRITTEN" = "" ]; then
		echo "missing tape ${VOLHEADER}${I}" >&2
		echo "${VOLHEADER}${I}" >> $AllTapeList \
		&& echo "added ${VOLHEADER}${I} to $AllTapeList" >&2
	elif [ "$EXISTS" = "" -a "$WRITTEN" != "" ]; then
		echo "tape written, but not existing: ${VOLHEADER}${I}" >&2
	elif [ "$EXISTS" != "" -a "$WRITTEN" = "" ]; then
		echo "free tape: ${VOLHEADER}${I}" >&2
	fi
	I=`expr $I + 1`
done

echo "next tape is ${VOLHEADER}${NEXTTAPE}" >&2

exit 0