wok annotate syslinux/stuff/tools/isohybrid.sh @ rev 5953

Up: exiftool 8.27
author Antoine Bodin <gokhlayeh@mailoo.org>
date Tue Aug 03 22:23:30 2010 +0200 (2010-08-03)
parents 81f59d88ba12
children b25fc6e108b2
rev   line source
pascal@4513 1 #!/bin/sh
pascal@4513 2
pascal@4513 3 build="--build"
pascal@4513 4 if [ "$1" == "$build" ]; then
pascal@4513 5 cat >> $0 <<EOM
pascal@4513 6 $(uuencode -m mbr/isohdpfx.bin -)
pascal@4513 7 EOT
pascal@4513 8 EOM
pascal@5078 9 busybox sed -i "/$build/{NNNNNNNNNd}" $0
pascal@4513 10 exit
pascal@4513 11 fi
pascal@4513 12
pascal@4513 13 if [ -z "$1" ]; then
pascal@4513 14 cat << EOT
pascal@4513 15 usage: $0 isoimage
pascal@4513 16 EOT
pascal@4513 17 exit 1
pascal@4513 18 fi
pascal@4513 19 iso=$1
pascal@4513 20 heads=64 # zipdrive-style geometry
pascal@4513 21 sectors=32
pascal@4513 22 partype=23 # "Windows hidden IFS"
pascal@4513 23
pascal@4513 24 readiso()
pascal@4513 25 {
pascal@4513 26 dd if=$iso bs=2k skip=$1 count=1 2> /dev/null | \
pascal@4513 27 dd bs=1 skip=$2 count=$3 2> /dev/null
pascal@4513 28 }
pascal@4513 29
pascal@4513 30 # read a 32 bits data
pascal@4513 31 readlong()
pascal@4513 32 {
pascal@4513 33 readiso $1 $2 4 | hexdump -e '"" 1/4 "%d" "\n"'
pascal@4513 34 }
pascal@4513 35
pascal@4513 36 # write a 32 bits data
pascal@4513 37 storelong()
pascal@4513 38 {
pascal@4513 39 printf "00000 %02X %02X %02X %02X \n" \
pascal@4513 40 $(( $2 & 255 )) $(( ($2>>8) & 255 )) \
pascal@4513 41 $(( ($2>>16) & 255 )) $(( ($2>>24) & 255 )) | \
pascal@4513 42 hexdump -R | dd bs=1 conv=notrunc of=$iso seek=$(( $1 )) 2> /dev/null
pascal@4513 43 }
pascal@4513 44
pascal@4513 45 setmbr()
pascal@4513 46 {
pascal@4513 47 uudecode | dd of=$iso conv=notrunc 2> /dev/null
pascal@4513 48 storelong 432 $(( $lba * 4 ))
pascal@4513 49 storelong 440 $(( ($RANDOM << 16) + $RANDOM ))
pascal@4513 50 storelong 446 $(( 0x80 + ( 1 << 16) ))
pascal@4513 51 esect=$(( $sectors + ((($cylinders -1) & 0x300) >> 2) ))
pascal@4513 52 ecyl=$(( ($cylinders - 1) & 0xff ))
pascal@4513 53 storelong 450 $(( $partype + (($heads - 1) << 8) + ($esect << 16) + ($ecyl <<24) ))
pascal@4513 54 storelong 458 $(( $cylinders * $heads * $sectors ))
pascal@4513 55 storelong 510 $(( 0xAA55 ))
pascal@4513 56 }
pascal@4513 57
pascal@4513 58 if [ "$(readiso 17 7 23)" != "EL TORITO SPECIFICATION" ]; then
pascal@4513 59 echo "$iso: no boot record found.";
pascal@4513 60 exit 1
pascal@4513 61 fi
pascal@4513 62 catalog=$(readlong 17 71)
pascal@4513 63 if [ "$(readiso $catalog 0 32 | md5sum | awk '{ print $1 }')" != \
pascal@4513 64 "788e7bfdad52cc6aae525725f24a7f89" ]; then
pascal@4513 65 echo "$iso: invalid boot catalog.";
pascal@4513 66 exit 1
pascal@4513 67 fi
pascal@4513 68 lba=$(readlong $catalog 40)
pascal@4513 69 if [ $(readlong $lba 64) -ne 1886961915 ]; then
pascal@4513 70 echo "$iso: bootloader does not have a isolinux.bin hybrid signature.";
pascal@4513 71 exit 1
pascal@4513 72 fi
pascal@4513 73 size=$(stat -c "%s" $iso)
pascal@4513 74 pad=$(( $size % (512 * $heads * $sectors) ))
pascal@4513 75 [ $pad -eq 0 ] || pad=$(( (512 * $heads * $sectors) - $pad ))
pascal@4513 76 [ $pad -eq 0 ] || dd if=/dev/zero bs=512 count=$(( $pad / 512 )) >> $iso 2> /dev/null
pascal@4513 77 cylinders=$(( ($size + $pad) / (512 * $heads * $sectors) ))
pascal@4513 78 if [ $cylinders -gt 1024 ]; then
pascal@4513 79 cat 1>&2 <<EOT
pascal@4513 80 Warning: more than 1024 cylinders ($cylinders).
pascal@4513 81 Not all BIOSes will be able to boot this device.
pascal@4513 82 EOT
pascal@4513 83 cylinders=1024
pascal@4513 84 fi
pascal@4513 85
pascal@4513 86 setmbr <<EOT