#!/bin/bash

#DESC Create 7 partitions on a passport for a backup each day of the week.
# This script will configure rtibackup.pl to run seperate, full backups for each day of the week on the same backup device.
# Note: This script trusts your device is big enough for 7, seperate, 600GB partitions on your backup device, and that is large enough for your backup.
# Note2: There will be seven partions on the backup device. The number of the partition corrisponds to the day of the week + 4. Example: Mon = /dev/sdX5; Tues = /dev/sdX6; etc.
# Sample cron job
# 05 03 * * * root (/usr/bin/test -e /usr2/bbx && . /etc/profile.d/rti.sh && /usr2/bbx/bin/rtibackup.pl --rti --configfile=/usr2/bbx/config/backups.config --device=/dev/sdb$(expr $(date +"\%u") + 4) --backup=all --verify --console)

# Find device
# check conf file first
BACKUPDEVICE=`grep -i ^device=/dev/sd /usr2/bbx/config/backups.config`
# assign default if none in conf file
[ "$BACKUPDEVICE" == "" ] && BACKUPDEVICE=/dev/sdb
# verify exists in /dev
BACKUPDEVICE=`ls $BACKUPDEVICE 2>/dev/null`
[ "$BACKUPDEVICE" == "" ] && echo "No backup device found." && exit 1
# check for incremental installed already and ask for format only if so.
#[ "`grep -i ^device=$BACKUPDEVICE\$((\`date +\"%u\"\` + 4))" /usr2/bbx/config/backups.config`" != "" ] && echo "Backup device already configured for incremental. Continue formatting $BACKUPDEVICE?" && read -n RESP
[ "$RESP" == "n" ] && exit 0

# Partition and format device
# wipe exisiting partition table
echo -n "About to format $BACKUPDEVICE. Proceed? (y/n): "
read CONT
[ "$CONT" == "n" ] && exit 0
echo "Wiping partition table on $BACKUPDEVICE ..."
wipefs -a $BACKUPDEVICE
echo "Configuring $BACKUPDEVICE..."
# writing gpt label (for large disks)
sed -e 's/\s*\([\+0-9a-zA-Z]*\).*/\1/' << EOF | fdisk $BACKUPDEVICE
 g
 w
EOF
# create fist extended primary partition
#sed -e 's/\s*\([\+0-9a-zA-Z]*\).*/\1/' << EOF | fdisk $BACKUPDEVICE
# n
# e 
# 4
#
#
# w
#EOF
# partitions
for part in 5 6 7 8 9 10 11
do
sed -e 's/\s*\([\+0-9a-zA-Z]*\).*/\1/' << EOF | fdisk $BACKUPDEVICE
 n
 $part

 +600G
 w
EOF
done
# reread partition table
partprobe $BACKUPDEVICE
sleep 4
# format
for part in 5 6 7 8 9 10 11
do
mkfs.ext2 -F -F $BACKUPDEVICE$part
done

echo "$BACKUPDEVICE configured."

echo "Done."
exit 0