wok annotate syslinux/stuff/iso2exe/iso2exe.sh @ rev 13974

syslinux/iso2exe: fix checksum
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Feb 06 12:05:22 2013 +0100 (2013-02-06)
parents b5ea41033c21
children a26ba54f3ea7
rev   line source
pascal@13691 1 #!/bin/sh
pascal@13691 2 if [ "$1" == "--build" ]; then
pascal@13691 3 shift
pascal@13691 4 [ $(tar cf - $@ | wc -c) -gt $((32 * 1024)) ] &&
pascal@13691 5 echo "The file set $@ is too large (31K max) :" &&
pascal@13691 6 ls -l $@ && exit 1
pascal@13691 7 cat >> $0 <<EOM
pascal@13691 8 $(tar cf - $@ | lzma e -si -so | uuencode -m -)
pascal@13691 9 EOT
pascal@13691 10 EOM
pascal@13691 11 sed -i '/--build/,/^fi/d' $0
pascal@13691 12 exit
pascal@13691 13 fi
pascal@13691 14
pascal@13691 15 ddq()
pascal@13691 16 {
pascal@13691 17 dd $@ 2> /dev/null
pascal@13691 18 }
pascal@13691 19
pascal@13691 20 store()
pascal@13691 21 {
pascal@13691 22 n=$2; for i in $(seq 8 8 ${4:-16}); do
pascal@13691 23 printf '\\\\x%02X' $(($n & 255))
pascal@13691 24 n=$(($n >> 8))
pascal@13691 25 done | xargs echo -en | ddq bs=1 conv=notrunc of=$3 seek=$(($1))
pascal@13691 26 }
pascal@13691 27
pascal@13972 28 get()
pascal@13972 29 {
pascal@13972 30 echo $(od -j $(($1)) -N ${3:-2} -t u${3:-2} -An $2)
pascal@13972 31 }
pascal@13972 32
pascal@13691 33 main()
pascal@13691 34 {
pascal@13691 35 case "$1" in
pascal@13691 36 --get) shift
pascal@13691 37 uudecode | unlzma | tar xOf - $@
pascal@13691 38 exit ;;
pascal@13691 39 *) cat > /dev/null
pascal@13691 40 esac
pascal@13691 41
pascal@13691 42 [ ! -s "$1" ] && echo "usage: $0 image.iso" 1>&2 && exit 1
pascal@13691 43 case "$(od -N 2 -t x2 -An $1)" in
pascal@13691 44 *5a4d) echo "The file $1 is already an EXE file." 1>&2 && exit 1;;
pascal@13691 45 *0000) [ -x /usr/bin/isohybrid ] && isohybrid $1
pascal@13691 46 esac
pascal@13691 47
paul@13692 48 echo "Moving syslinux hybrid boot record..."
pascal@13691 49 ddq if=$1 bs=512 count=1 | ddq of=$1 bs=512 count=1 seek=1 conv=notrunc
pascal@13691 50
paul@13692 51 echo "Inserting EXE boot record..."
pascal@13691 52 $0 --get bootiso.bin | ddq of=$1 conv=notrunc
pascal@13691 53
pascal@13691 54 # keep the largest room for the tazlito info file
pascal@13691 55 TMP=/tmp/iso2exe$$
pascal@13713 56 mkdir -p $TMP/bin $TMP/dev
pascal@13713 57 cp -a /dev/?d?* $TMP/dev
pascal@13691 58 $0 --get init > $TMP/init.exe
pascal@13974 59 grep -q mount.posixovl.iso2exe $TMP/init.exe &&
pascal@13974 60 cp /usr/sbin/mount.posixovl $TMP/bin/mount.posixovl.iso2exe
pascal@13974 61 find $TMP -type f | xargs chmod +x
pascal@13713 62 ( cd $TMP ; find * | cpio -o -H newc ) | \
pascal@13691 63 lzma e $TMP/rootfs.gz -si 2> /dev/null
pascal@13691 64 SIZE=$(wc -c < $TMP/rootfs.gz)
pascal@13972 65 store 24 $SIZE $1
pascal@13691 66 OFS=$(( 0x8000 - $SIZE ))
paul@13692 67 printf "Adding rootfs.gz file at %04X...\n" $OFS
pascal@13691 68 cat $TMP/rootfs.gz | ddq of=$1 bs=1 seek=$OFS conv=notrunc
pascal@13691 69 rm -rf $TMP
pascal@13972 70 SIZE=$($0 --get boot.com | wc -c)
pascal@13691 71 OFS=$(( $OFS - $SIZE ))
paul@13692 72 printf "Adding DOS boot file at %04X...\n" $OFS
pascal@13972 73 $0 --get boot.com | ddq of=$1 bs=1 seek=$OFS conv=notrunc
pascal@13972 74 store 66 $(($OFS+0xC0)) $1
pascal@13974 75 SIZE=$($0 --get win32.exe 2> /dev/null | tee /tmp/exe$$ | wc -c)
pascal@13974 76 if [ $SIZE -ne 0 ]; then
pascal@13974 77 OFS=$(( 128 + ( ($OFS - $SIZE + 128) & 0xFE00 ) ))
pascal@13974 78 printf "Adding WIN32 file at %04X...\n" $OFS
pascal@13974 79 LOC=$((0xAC+$(get 0x94 /tmp/exe$$)))
pascal@13974 80 for i in $(seq 1 $(get 0x86 /tmp/exe$$)); do
pascal@13974 81 store $LOC $(($(get $LOC /tmp/exe$$)+$OFS-128)) /tmp/exe$$
pascal@13974 82 LOC=$(($LOC+40))
pascal@13974 83 done
pascal@13974 84 ddq if=/tmp/exe$$ of=$1 bs=1 skip=128 seek=$OFS conv=notrunc
pascal@13974 85 fi
pascal@13972 86 rm -f /tmp/exe$$
pascal@13972 87 store 60 $OFS $1
pascal@13972 88 store 26 ${RANDOM:-0} $1
pascal@13974 89 i=66
pascal@13697 90 n=0
pascal@13697 91 echo -n "Adding checksum..."
pascal@13697 92 while [ $i -lt 32768 ]; do
pascal@13972 93 n=$(($n + $(get $i $1) ))
pascal@13697 94 i=$(($i + 2))
pascal@13697 95 done
pascal@13972 96 store 64 -$n $1
pascal@13697 97 echo " done."
pascal@13691 98 }
pascal@13691 99
pascal@13691 100 main $@ <<EOT