1 #! /bin/sh

     2 

     3 set -e

     4 

     5 cleanup() {

     6     umount $mnt 2>/dev/null || true

     7     losetup -vd $loop || true

     8     rm -r $dir

     9 }

    10 

    11 trap cleanup EXIT

    12 

    13 dir=`mktemp -d`

    14 

    15 image=$dir/image

    16 mnt=$dir/mnt

    17 record=$dir/dumpdates

    18 

    19 echo "# creating sparse image file $image"

    20 dd of=$image count=0 bs=1M seek=128

    21 

    22 echo "# creating the mountpoint"

    23 mkdir $dir/mnt

    24 

    25 x=$(losetup -fv $image)

    26 loop=${x##* }

    27 echo "# image connected to $loop"

    28 

    29 mkfs -t ext4 $loop

    30 

    31 # installing sample data

    32 mount $loop $mnt

    33 mkdir $mnt/abc.d

    34 touch $mnt/abc.d/foo

    35 sync

    36 umount $mnt

    37 

    38 dump -0 -u -D $record -f $dir/dump-0 $loop

    39 

    40 # remove the dir

    41 mount $loop $mnt

    42 mv $mnt/abc.d/foo $mnt/

    43 rmdir $mnt/abc.d

    44 sync

    45 umount $mnt

    46 

    47 dump -1 -u -D $record -f $dir/dump-1 $loop

    48 

    49 # now starting a shell

    50 cd $dir

    51 $SHELL