#!/bin/bash

IMG=/tmp/toto.img

MNT_POINT=/mnt/loop

LOOP_DEV=/dev/loop0

BIG_FILE=$MNT_POINT/big

SETUP_LOG=/tmp/loopfs.log

LOG=/tmp/loopfs.log

CMD=$1

# ===================================

setup() {

echo setup

if [ -e $IMG ]; then

rm $IMG

fi

if [ -e $LOG ]; then rm $LOG; fi

if [ -e $SETUP_LOG ]; then rm $SETUP_LOG; fi

dd if=/dev/zero of=$IMG count=1000 >> $SETUP_LOG 2>&1

losetup $LOOP_DEV $IMG >> $SETUP_LOG 2>&1

mkfs.ext2 $LOOP_DEV >> $SETUP_LOG 2>&1

mount $LOOP_DEV $MNT_POINT >> $SETUP_LOG 2>&1

chown -R ceki:ceki $MNT_POINT

}

shake() {

echo "shake"

declare -i i=0

while [ $i -lt 5 ]

do

i+=1;

sleep 0.5

dd if=/dev/zero of=$BIG_FILE count=1000 >> $LOG 2>&1

echo "dd `date`" >> $LOG

sleep 0.5;

rm $BIG_FILE >> $LOG 2>&1

echo "rm $BIG_FILE" >> $LOG

done

}

teardown() {

echo teardown

umount $MNT_POINT

losetup -d $LOOP_DEV

}

# ===========================================

case $CMD in

setup)

setup

;;

shake)

shake

;;

teardown)

teardown

;;

esac