#!/bin/sh
# Note that this script is limited to SCSI drives on integral controllers
# or raid5 controllers
# (that is, not the jaguar or cougar VME SCSI controllers) and defaults to
# controller 0.
# It makes the filesystem on partition 7 (appropriate for option drives),
# creates the mount directory, and an fstab entry for the drive, then mounts it.

CTLR=0 ID=2 LUN=0 # defaults
if [ $# -gt 3 ]
then
	echo "Usage $0 [controller] [disk_number] [lun_number]"
	exit 1
elif [ $# -eq 3 ]
then
	CTLR="$1" ID="$2" LUN="$3"
elif [ $# -eq 2 ]
then
	CTLR="$1" ID="$2"
elif [ $# -eq 1 ]
then
	ID="$1"
fi

rootdisk="`devnm /|sed 's/[ 	].*//`"
if [ $LUN -gt 0 ]
then
	DS=dks${CTLR}d${ID}l${LUN}
else
	DS=dks${CTLR}d${ID}
fi 
DSK=/dev/dsk/${DS}s7
RDSK=/dev/rdsk/${DS}s7

if [ $LUN -gt 0 ]
then
	MOUNTPT=/disk$CTLR$ID$LUN
else
	MOUNTPT=/disk$CTLR$ID
fi


case "$rootdisk" {
*/dev/dsk/${DS}*)
	echo You may not use this for the system disk, only option disks
	exit 1
	;;
}

if [ $LUN -gt 0 ]
then
hinv -c disk | grep -s "unit $ID, lun $LUN on SCSI controller $CTLR" > /dev/null 2>&1
d=$?
else
hinv -c disk | grep -s "unit $ID on SCSI controller $CTLR" > /dev/null 2>&1
d=$?
fi

hinv -c scsi | grep -s "Optical disk: unit $ID on SCSI controller $CTLR" > /dev/null 2>&1
o=$?
if [ $d -ne 0 -a $o -ne 0 ]
then 
	if [ $LUN -gt 0 ]
	then
	echo SCSI disk $ID with lun $LUN not found on controller $CTLR in 
	echo hardware inventory. If you are sure that you have the right SCSI 
	echo ID, be sure that the disk is attached and powered up when the 
	echo system is booted.
	else
	echo SCSI disk $ID not found on controller $CTLR in hardware inventory
	echo If you are sure that you have the right SCSI ID, be sure that the
	echo disk is attached and powered up when the system is booted.
	fi
	exit 1
fi

if [ ! -c /dev/rdsk/${DS}vh ] 
then 

	if [ $LUN -gt 0 ]
	then
	echo "No volume header device (/dev/rdsk/${DS}vh) found, for disk $ID"
	echo with lun $LUN on controller $CTLR.  You may need to run the 
	echo following commands to create the device files:
	else
	echo "No volume header device (/dev/rdsk/${DS}vh) found, for disk $ID"
	echo on controller $CTLR.  You may need to run the following commands to
	echo create the device files:
	fi
	echo "\tcd /dev; ./MAKEDEV disks"
	exit 1
fi

if prtvtoc /dev/rdsk/${DS}vh > /dev/null 2>&1
then :
else 
	if [ $LUN -gt 0 ]
	then
	echo SCSI disk $ID with lun $LUN on controller $CTLR does not appear 
	echo to be initialized with a Silicon Graphics volume header.  You may 
	echo need to use \"fx\" to initialize it.
	else
	echo SCSI disk $ID on controller $CTLR does not appear to be initialized
	echo with a Silicon Graphics volume header.  You may need to use
	echo \"fx\" to initialize it.
	fi
	exit 1
fi

if [ $LUN -gt 0 ]
then
echo "\nAdding SCSI disk $ID with lun $LUN on controller $CTLR"
else
echo "\nAdding SCSI disk $ID on controller $CTLR"
fi

/etc/fsstat $DSK > /dev/null 2>&1
s7=$?
/etc/fsstat /dev/dsk/${DS}s6 > /dev/null 2>&1
s6=$?
/etc/fsstat /dev/dsk/${DS}s0 > /dev/null 2>&1
s0=$?
if [ $s7 -ne 3 -o $s6 -ne 3 -o $s0 -ne 3 ]
then
	echo "\007SCSI disk $ID appears to have a valid filesystem, overwrite it? (n)\c"
	read answer
	case "$answer" {
	y|Y|yes|Yes|YES) ;;
	*) 
		if [ $LUN -gt 0 ]
		then
		echo Disk $ID with lun $LUN on controller $CTLR not added, previous data preserved
		else
		echo Disk $ID with lun $LUN on controller $CTLR not added, previous data preserved
		fi
		exit 1;;
	}
fi

# unmount it by disk name, in case it is mounted on a different mount pt.
umount $DSK > /dev/null 2>&1

# make the new filesystem; raw device is much faster
mkfs $RDSK > /dev/null 2>&1
if [ $? -ne 0 ]
then
	if [ $LUN -gt 0 ]
	then
	echo Unable to create a filesystem on SCSI disk $ID with lun $LUN on controller $CTLR
	else
	echo Unable to create a filesystem on SCSI disk $ID on controller $CTLR
	fi
	exit 1
fi

# create directory
if [ ! -d $MOUNTPT ]
then
	rm -f $MOUNTPT
	mkdir $MOUNTPT
	if [ ! -d $MOUNTPT ]
	then
		echo Can not make mount directory $MOUNTPT; exit 1
	fi
fi

# add the entry to /etc/fstab (ignore commented out lines!)
# make sure that the mount point matches also; if it was mounted
# as something else before, the 2nd mount attempt on next boot
# will at least print an error message
egrep -s "^$DSK[ 	][ 	]*$MOUNTPT[ 	]" /etc/fstab > /dev/null 2>&1
if [ $? -ne 0 ]
then
	echo "$DSK $MOUNTPT xfs rw,raw=$RDSK 0 0" >> /etc/fstab
fi
sync

# label the disk with its directory name
## xfs doesn't support labelit
#if [ $LUN -gt 0 ]
#then
#labelit $RDSK disk$CTLR$ID$LUN sgi > /dev/null 2>&1
#else
#labelit $RDSK disk$CTLR$ID sgi > /dev/null 2>&1
#fi

# mount the filesystem
if mount -v $MOUNTPT
then echo "\nNew disk ready to use as $MOUNTPT."; df -lik $MOUNTPT; exit 0
else echo "\007Failed to mount $DSK on $MOUNTPT"; exit 1
fi