#!/bin/bash

# This script prepares an IOmega disk for use with amanda.
# More precisely, it
# - formats the disk, checking for bad sectors
# - mounts the disk and adds a data subdirectory
# - makes user amanda owner of this data sub directory
# - calls amlabel to label the disk
# - unmounts and ejects the disk.
# 
# This shell script is not generally usable as is, 
# because it is relying on a couple of settings of personal taste, such as
# - IOmega disks are partitioned and the fourth primary partition 
#   is taking the whole disk. So the disk is visible as /dev/sda4.
# - I am preferring to use an ext2 filesystem on the disk 
#   (rather then a dos or vfat file system)
# - I am doing a chown of the data sub directory such that - depending 
#   on the umask setting - only user amanda and root can see 
#   the files written to the disk.

# It has to be called as root

if [ "$#" -lt "2" ]
	then
	echo "Usage : $0 <backup set> <disk label>"
	exit 1
fi

backup="$1"
label="$2"

echo "insert tape $2 into slot and press return" 
read ANSWER

mkfs.ext2 -c -L $label /dev/iomega

echo "mounting disk ..."
mount /dev/iomega
if [ ! -d /mnt/iomega/lost+found ]
	then
	echo "mount did not work properly - please investigate"
	exit 1
fi

echo "adding data subdirectory ..."
cd /mnt/iomega
mkdir data
chown -R amanda:disk .
if [ -n "$label" ]
	then
	echo "attempting to write amanda disk label"
	su - amanda -c "/usr/sbin/amlabel $backup $label"
fi

echo "preparing to eject disk ..."
cd >/dev/null 2>&1
eject /mnt/iomega

echo "please don't forget to label with $backup $label"