Shell Programming and Scripting

vgname=$(grep ^/dev /mnt/USBDrive/lvminfo/fstab_info | cut -d'/' -f4 | cut -d'-' -f1 | sed '2,99d')

read f1 f2 f3 f4 f5 f6 f7 f8 f9 f10 f11 f12 <<< $(grep $vgname /mnt/USBDrive/lvminfo/fstab_info | cut -d'-' -f2 | cut -d'/' -f1 | cut -d" " -f1 | sort -d -t" " | awk '{printf("%s%s",$0,NR%9?" ":"\n")}')

 echo $f1 $f2 $f3 $f4 $f5 $f6 $f7 $f8 $f9
backup home opt root swap tmp usr usr_local var

for ($f1-$f9)
    mkdir /mnt/$vgname/($f1-$f9)
    mount /dev/mapper/$vgname-($f1-$f9)
    increment to next varname ($f1-$f9)
repeat until all filled variables have created required directories and mounted lvms
exit

#!/bin/bash
#
# This scipt is to be run from a LiveCD environment in a root terminal
#
clear
echo
echo
echo "Mounting USB Hard Drive to mount point /mnt/USBDrive..."
# We'll create a mount point and mount the main directory structure of our backup drive to this point.
mkdir -p /mnt/USBDrive
mount -o defaults /dev/sdb2 /mnt/USBDrive
echo "Done!"
echo 
# We are going to need the physical volume name and UUID along with the Volume Group name later in this process
# We also want to determine the starting and ending sector (along with the partition number) of our luks partition
echo "Setting a few variables for later..."
pvname=$(grep Name /mnt/USBDrive/lvminfo/pvparse | cut -d'/' -f4)
pvuuid=$(grep UUID /mnt/USBDrive/lvminfo/pvparse | cut -b 25-62)
vgname=$(grep ^/dev /mnt/USBDrive/lvminfo/fstab_info | cut -d'/' -f4 | cut -d'-' -f1 | sed '2,99d')
startsec=$(grep ^/dev /mnt/USBDrive/info/fdisk_info | grep G | cut -d" " -f3)
endsect=$(grep ^/dev /mnt/USBDrive/info/fdisk_info | grep G | cut -d" " -f4)
partnum=$(grep $startsec /mnt/USBDrive/info/sgdisk_info | cut -b4)
# The following line initializes a series of variables from a string of alphabetically sorted lvnames created from fstab_info (with modification you can initialize as many variables as you desire -- just add more fX to the list) Here I know that I only have 9 lvm's so I chose to add only 9 f variables.
read f1 f2 f3 f4 f5 f6 f7 f8 f9 <<< $(grep $vgname /mnt/USBDrive/lvminfo/fstab_info | cut -d'-' -f2 | cut -d'/' -f1 | cut -d" " -f1 | sort -d -t" " | awk '{printf("%s%s",$0,NR%9?" ":"\n")}')
# Once we have gotten the volume group name from fstab we can create a mount point for the restore process 
mkdir -p /mnt/$vgname
echo
# We start the recovery process by writing our saved critical disk areas to the new drive
# This will give us a mountable drive with the partition table, EFI and boot partitions as they were on the original drive
echo "Restoring the first 2048 sectors of /dev/sda..."
dd if=/mnt/USBDrive/dd/partition-restore of=/dev/sdc bs=1 count=2047
echo
echo "Restoring the EFI partition as /dev/sda1..."
dd if=/mnt/USBDrive/dd/sda1EFI-restore of=/dev/sdc1 bs=8192
echo
echo "Restoring the Boot partition as /dev/sda2..."
dd if=/mnt/USBDrive/dd/sda2Boot-restore of=/dev/sdc2 bs=8192
echo
echo "Prepping to restore the luks partition, and VG/LVM structures..."
echo
# Just to ensure that there isn't any old luks data on our new drive that will present errors during the restortion of our saved luks partition header image, we need to wipe out any signs of any previous lvm info that might be there
echo "First we will ensure that no old crypt/lvm info remains on our recovery disk"
cryptsetup -v isLuks /dev/sdc$partnum
head -c 3145728 /dev/zero > /dev/sdc$partnum; sync
# Next, we will recreate the partition from scratch and format it to ext4
echo "Then we will create a new /dev/sda3 and restore our backup img"
sgdisk -d $partnum -n $partnum:$startsec:$endsec -t $partnum:8300 /dev/sdc
# We need to inform the kernel about the changes
partprobe
# And format the partition we just created
mkfs -t ext4 /dev/sdc$partnum
echo
echo "Restoring Cryptsetup header and key slots..."
cryptsetup -q luksHeaderRestore /dev/sdc$partnum --header-backup-file /mnt/USBDrive/lvminfo/cryptbackup.img
echo
echo "Opening crypt partition for writing..."
cryptsetup -vv open /dev/sdc$partnum --type luks $pvname
echo
echo "Restoring Physical Volume..."
pvcreate -f --uuid $pvuuid --restorefile /mnt/USBDrive/lvminfo/$vgname /dev/mapper/$pvname
echo
echo "Restoring & Checking Volume Group and Logical Volumes structures..."
vgcfgrestore $vgname
lvs -a -o +devices
vgchange -ay $vgname
pvck -vv
vgck -vv
mkfs -t ext4 /dev/mapper/$vgname-*
mkswap /dev/mapper/$vgname-swap
echo

for fs in $f{1..12}
do
    mkdir /mnt/$vgname/$fs
    mount /dev/mapper/${vgname}-${fs}
done

read -a farray <<<< $(grep $vgname ....)

for fs in ${farray[@]}
do
    mkdir /mnt/$vgname/$fs
    mount /dev/mapper/${vgname}-${fs}
done

for fs in $(grep $vgname ... )
do
    mkdir /mnt/$vgname/$fs
    ...
done

echo "Creating Mount Points, mounting individual LVM's from Volume Group and restoring data..."
for fs in ${farray[@]}
do
    mkdir /mnt/$vgname/$fs
    mount /dev/mapper/${vgname}-${fs} /mnt/$vgname/$fs
    rsync -aHvu /mnt/USBDrive/Recover/$fs /mnt/$vgname/$fs
done

for fs in ${farray[@]:1}
do
    mkdir /mnt/$vgname/$fs
    mount /dev/mapper/${vgname}-${fs} /mnt/$vgname/$fs
    rsync -aHvu /mnt/USBDrive/Recover/$fs /mnt/$vgname/$fs
done

    mkdir /mnt/$vgname/${farray[0]}
    mount /dev/mapper/${vgname}-${farray[0]} /mnt/$vgname/${farray[0]}
    rsync -aHvu --exclude={/backup/*,/home/*,/opt/*,/tmp/*,/usr/*,/usr/local/*,/var/*} /mnt/USBDrive/Recover/${farry[0]} /mnt/$vgname/${farry[0]}

for fs in ${farry[@]}
do
    mkdir -p /mnt/$vgname/$fs
    mount /dev/mapper/${vgname}-$fs /mnt/$vgname/$fs
    rsync -aHvu /mnt/USBDrive/Recover/$fs /mnt/$vgname/$fs
done
rsync -aHvu --ignore-existing /mnt/USBDrive/Recover/ /mnt/$vgname/