SliTaz Repositories

1 #!/bin/sh

2

3 ddq()

4 {

5 dd $@ 2> /dev/null

6 }

7

8 get()

9 {

10 od -v -j $1 -N ${4:-${3:-2}} -t u${3:-2} -w${3:-2} -An $2 2>/dev/null ||

11 hexdump -v -s $1 -n ${4:-${3:-2}} -e "\"\" 1/${3:-2} \" %d\n\"" $2

12 }

13

14 [ -z "$1" ] && echo "usage: $0 file.iso" && exit 1

15

16 echo "iso data sectors 16..$(echo $(get 32848 $1 4))"

17 ddq if=$1 bs=2k skip=16 count=$(echo $(get 32848 $1 4)) | md5sum

18 ddq if=$1 bs=16 count=1 skip=2047 | od -N 16 -t x1 -An | sed 's/ //g'

19 n=$(($(get 2 $1)-1+($(get 4 $1)-1)*512))

20 [ 0 -ne $(get 18 $1) ] && [ $n -lt 50000 ] && [ $n -gt 32768 ] &&

21 printf "exe16 chk 0..%04X (65535) %d\n" $n $(get 0 $1 2 $n | awk '{ i+= $0 } END { print i % 65536 }')

22 echo -n "boot chk 40..8000 (0) "

23 get 64 $1 2 32704 | awk '{ i+= $0 } END { print i % 65536 }'

24 if [ 23117 -eq $(get 0 $1) ]; then

25 win32sz=$((512*$(get 69 $1 1)))

26 [ 17744 -eq $(get 128 $1) ] && printf "WIN32 file at 0000 (%d bytes)\n" $win32sz

27 [ 29538 -eq $(get 125 $1) ] && echo "bootiso head at 0000"

28 if [ $win32sz -ne 0 ]; then

29 printf "syslinux hybrid boot record at %04X (512 bytes)\n" $win32sz

30 printf "tazlito data record at %04X (512 bytes)\n" $(($win32sz+512))

31 fi

32 dosexe=$(($(get 20 $1) - 0xC0))

33 rootfs=$(($dosexe - $(get 24 $1)))

34 doscom=$(get 66 $1)

35 fdsect=$(get 28 $1 1)

36 printf "%d free bytes at %04X..%04X\n" $(($doscom - (512*$fdsect) - $win32sz - 1024)) $(($win32sz+1024)) $(($doscom - (512*$fdsect)))

37 [ $fdsect -ne 0 ] &&

38 printf "floppy bootstrap file at %04X (%d bytes)\n" $(($doscom - (512*$fdsect))) $((512*$fdsect))

39 [ $doscom -ne 0 ] &&

40 printf "DOS boot file at %04X (%d bytes)\n" $doscom $(($rootfs - $doscom))

41 [ $dosexe -ne $rootfs ] &&

42 printf "rootfs.gz file at %04X (%d bytes)\n" $rootfs $(($dosexe - $rootfs))

43 printf "DOS/EXE stub at %04X (%d bytes)\n" $dosexe $((0x8000 - $dosexe))

44 [ 0 -ne $(get 32756 $1) ] && echo "ISO image md5 at 7FF0 (16 bytes)"

45 fi