#/bin/ksh

#
# tool to convert ctd & rmt numbers to sd & st numbers
#

#command line parsing for help

if [[ $1 == -h || $1 == -help || $1 == \? ]]
then
	print "USAGE: $0 [EXCLUSIVE: -tape, -disk, device-name]"
	print "Without an argument, does both tape and disk devices"
	print "NOTE: Does not do floppy or nfs devices"
	print ""
	print "$0"
	print "$0 -disk"
	print "$0 -tape"
	print ""
	print "$0 c0t0d0   (it assumes s2)"
	print "$0 22       (it assumes rmt/)"
	print ""
	exit 1
fi

#command line parsing

if (( ! $# ))
then
	TYPE=both
else
	if [[ $1 == -tape || $1 == -disk ]]
	then
		TYPE=$1
	else
		MYDEV=$1
		
		if [[ -n $(print $MYDEV | grep ^c) ]]
		then
			TYPE=-disk
		else
			TYPE=-tape
		fi
	fi
fi

#functions

disks () {

if [[ -z $MYDEV ]]
then
	DEVS=$(ls -l /dev/dsk/c*t*d*s2 | awk '{print $9}')
else
	if [[ -z $(print $MYDEV | grep s2$) ]]
	then
		DEVS=/dev/dsk/${MYDEV}s2
	else
		DEVS=/dev/dsk/$MYDEV
	fi
fi 

for DEV in $DEVS
do
	print "$DEV \c"

	if [[ -L $DEV ]]
	then 
		ITEM=$(ls -l $DEV | \
			    awk '{print $11}' | \
			    cut -c14- | \
			    awk -F: '{print $1}')
	
		grep $ITEM /etc/path_to_inst | awk '{printf "sd%d \n", $2}'

	else
		print "was not found"
	fi
done
}

tapes () {

if [[ -z $MYDEV ]]
then
	DEVS=$(ls -l /dev/rmt/*[0-9] 2> /dev/null | awk '{print $9}')
else
	DEVS=/dev/rmt/$MYDEV
fi 

for DEV in $DEVS
do
	print "$DEV \c"

	if [[ -L $DEV ]]
	then 
		ITEM=$(ls -l $DEV | \
			    awk '{print $11}' | \
			    cut -c14- | \
			    awk -F: '{print $1}')
	
		grep $ITEM /etc/path_to_inst | awk '{printf "st%d \n", $2}'

	else
		print "was not found"
	fi
done
}

#######
# run the program
#######
if [[ $TYPE == both ]]
then
	disks
	tapes
elif [[ $TYPE == -disk ]]
then
	disks
else [[ $TYPE == -tape ]]
	tapes
fi