1 #!/bin/sh

2

3 bind_mounts () {

4 # set defaults

5 test -z "$tmpfs_dir" && tmpfs_dir=/var/lib/xenomips

6 test -z "$rw_dirs" \

7 && rw_dirs="/var/cache/man /var/lock /var/run /var/log /var/spool /var/tmp /tmp /var/lib/urandom /var/lib/dhcp3 /tmp"

8 test -z "$copy_dirs" && copy_dirs=""

9 test -z "$temp_copy_dirs" && temp_copy_dirs="/var/cache/debconf"

10 test -z "$bindfiles" && bindfiles=""

11 mount -t tmpfs -o mode=0755 tmpfs $tmpfs_dir

12 # preserve directory structure

13 for d in $rw_dirs ; do

14 if [ -d "$d" ]; then

15 cd $tmpfs_dir

16 tar --no-recursion -cpf - $(find $d -type d 2> /dev/null) 2> /dev/null | tar xpf -

17 mount --bind $tmpfs_dir/$d $d

18 else

19 echo "WARNING: $d does not exist"

20 fi

21 done

22 # copy contents into tmpfs

23 for d in $copy_dirs $temp_copy_dirs; do

24 if [ -d "$d" ]; then

25 cd $tmpfs_dir

26 tar -cpf - $d 2> /dev/null | tar xpf -

27 mount --bind $tmpfs_dir/$d $d

28 else

29 echo "WARNING: $d does not exist"

30 fi

31 done

32 # mount one file on top of another

33 for f in $bindfiles ; do

34 if [ -e "$f" ]; then

35 mkdir -p "$(dirname $tmpfs_dir/$f)"

36 cp $f $tmpfs_dir/$f

37 mount --bind $tmpfs_dir/$f $f

38 else

39 echo "WARNING: $f does not exist"

40 fi

41 done

42 touch /var/log/dmesg

43 }

44

45

46 bind_mounts

47