#!/bin/bash
#
# losetup.sh.txt
# --------------
#	- create 1024MB of disk space in memory
#
#
# Original File
# -------------
#	http://Linux-Boot.net/InitRD/Loop/
#	http://Linux-Boot.net/InitRD/Scripts/Loop/losetup.sh.txt
#
#
# Other URLs
# ----------
#	http://linux.ncl.ac.uk/encrypt/
#	http://loop-aes.sourceforge.net/loop-AES.README
#	http://new.remote-exploit.org/index.php/Linux_encrypt
#	http://www.linuxsecurity.com/docs/HOWTO/Encryption-HOWTO/Encryption-HOWTO-4.html
#
#
# 27-Apr-05 amo Cleanup loopDev
# 28-Apr-05 amo Added LOOP
# 29-Apr-05 amo Added NFS comments, rsync vs scp vs cp
#
#
# If /mnt/Loop is exported, stop the nfs server first
#
#
LOOP="$1"
#
if [ "$LOOP" != "loop0" -a "$LOOP" != "loop1" ];
then
  echo "#"
  echo "# $0 < loop0 | loop1 > "
  echo "#"
  #
  exit 1
  #
fi
#
LoopDev="/dev/$LOOP"
LoopFile="/opt/LoopFile"
LoopMnt="/mnt/$LOOP"
#
#
# redhat style
NFServer="/etc/rc.d/init.d/nfs"
#
# suse
#FServer="/etc/init.d/nfsserver"
#
#
echo "#"
echo "# losetup.sh.txt"
echo "#"
#
if [ ! -d "$LoopMnt" ];
then
  echo "#"
  echo "# Warning: Creating mount point=$LoopMnt.."
  echo "#"
  #
  mkdir $LoopMnt
  #
fi
#
#
#oopSize="16384"	# 16MB
#oopSize="32768"	# 32MB
#oopSize="65536"	# 64MB
#
#oopSize="256k"		# 256MB
#oopSize="512k"		# 512MB
LoopSize="1024k" 	# 1GB
#
#
# If /mnt/Loop is exported, stop the nfs server first
# ------------------------
#
echo "umount $LoopMnt ; losetup -d $LoopDev"
#
#	dd if=/dev/zero of=/dev/loop3 bs=4k conv=notrun
#cho "dd if=/dev/zero of=$LoopDev  bs=1k count=$LoopSize conv=sync"
echo "dd if=/dev/zero of=$LoopFile bs=1k count=$LoopSize conv=sync"
#
echo "losetup $LoopDev $LoopFile"
#
echo "mkfs.ext3 -q -m 1 $LoopDev"
#
##   "mount -o loop,rw -t ext3 $LoopFile $LoopMnt"
echo "mount $LoopDev $LoopMnt ; rm -f $LoopFile ; df "
echo "touch ${LoopMnt}/...$LOOP ; ls -la $LoopMnt"
#
#
#	#
#	# mount options
#	#
# 	mount -o rsize=8192,wsize=8192,soft,intr ....
#
#
# ==============
# export for NFS	- watch out for the owner of NFS exported resources
# ==============
echo "chown nobody $LoopMnt ; $NFS start"
#
echo "  #"
echo "  # .. do your magic to $LoopMnt.."
echo "  #"
#
#
#	cd /opt
#	date ; rsync  BACKUP.Suse-9.2/var.tgz /mnt/loop0 ; date
#	date ;  cp -p BACKUP.Suse-9.2/var.tgz /mnt/loop0 ; date
#	date ; scp -p BACKUP.Suse-9.2/var.tgz /mnt/loop0 ; date
#
#
# stop NFS
# ========
#	nfsserver stop
#
echo "$NFS stop ; umount $LoopDev ; losetup -d $LoopDev"
echo "#"
#
#
# End of file