wok annotate syslinux/stuff/tools/isohybrid.sh @ rev 7859

syslinux/isohybrid: add options
author Pascal Bellard <pascal.bellard@slitaz.org>
date Sat Jan 01 17:45:34 2011 +0100 (2011-01-01)
parents fdf437968364
children a80a9972e567
rev   line source
pascal@4513 1 #!/bin/sh
pascal@4513 2
pascal@7859 3 if [ "$1" == "--build" ]; then
pascal@7859 4 cat >> $0 <<EOM
pascal@7859 5 $(for i in fx fx_f fx_c px px_f px_c ; do
pascal@7859 6 cat mbr/isohdp$i.bin /dev/zero | dd bs=512 count=1 2> /dev/null
pascal@7859 7 done | gzip -9 | uuencode -m -)
pascal@4513 8 EOT
pascal@4513 9 EOM
pascal@7859 10 sed -i '/--build/,/^fi/d' $0
pascal@4513 11 exit
pascal@4513 12 fi
pascal@7859 13 iso=
pascal@7859 14 heads=64 # zipdrive-style geometry
pascal@7859 15 sectors=32
pascal@7859 16 partype=23 # "Windows hidden IFS"
pascal@7859 17 entry=1
pascal@7859 18 id=$(( ($RANDOM <<16) + $RANDOM))
pascal@7859 19 offset=0
pascal@7859 20 partok=0
pascal@7859 21 hd0=0
pascal@4513 22
pascal@7859 23 while [ -n "$1" ]; do
pascal@7859 24 case "$1" in
pascal@7859 25 -ct*) hd0=2;;
pascal@7859 26 -e*) entry=$2; shift;;
pascal@7859 27 -f*) hd0=1;;
pascal@7859 28 -h) heads=$2; shift;;
pascal@7859 29 -i*) id=$(($2)); shift;;
pascal@7859 30 -noh*) hd0=0;;
pascal@7859 31 -nop*) partok=0;;
pascal@7859 32 -o*) offset=$(($2)); shift;;
pascal@7859 33 -p*) partok=1;;
pascal@7859 34 -s) sectors=$2; shift;;
pascal@7859 35 -t*) partype=$(($2 & 255)); shift;;
pascal@7859 36 *) iso=$1;;
pascal@7859 37 esac
pascal@7859 38 shift
pascal@7859 39 done
pascal@7859 40
pascal@7859 41 if [ ! -f "$iso" ]; then
pascal@4513 42 cat << EOT
pascal@4513 43 usage: $0 isoimage
pascal@4513 44 EOT
pascal@4513 45 exit 1
pascal@4513 46 fi
pascal@7859 47
pascal@7859 48 ddq()
pascal@7859 49 {
pascal@7859 50 dd "$@" 2> /dev/null
pascal@7859 51 }
pascal@4513 52
pascal@4513 53 readiso()
pascal@4513 54 {
pascal@7859 55 ddq bs=2k skip=$1 count=1 if=$iso | ddq bs=1 skip=$2 count=$3
pascal@4513 56 }
pascal@4513 57
pascal@4513 58 # read a 32 bits data
pascal@7859 59 read32()
pascal@4513 60 {
pascal@7859 61 readiso $1 $2 4 | hexdump -e '"" 1/4 "%d" "\n"'
pascal@4513 62 }
pascal@4513 63
pascal@4513 64 # write a 32 bits data
pascal@7859 65 store32()
pascal@4513 66 {
pascal@7859 67 echo $2 | awk '{ for(n=$1,i=4;i--;n/=256) printf "\\\\x%02X",n%256 }' |\
pascal@7859 68 xargs echo -en | ddq bs=1 conv=notrunc of=$iso seek=$(($1))
pascal@4513 69 }
pascal@4513 70
pascal@7859 71 main()
pascal@4513 72 {
pascal@7859 73 uudecode | gunzip | ddq bs=512 count=1 of=$iso conv=notrunc \
pascal@7859 74 skip=$(( (3*$partok) + $hd0))
pascal@7859 75 store32 432 $(($lba * 4))
pascal@7859 76 store32 440 $id
pascal@7859 77 store32 508 $((0xAA550000))
pascal@7859 78 e=$(( (($entry -1) % 4) *16 +446))
pascal@7859 79 store32 $e $((0x10080))
pascal@7859 80 esect=$(( ($sectors + ((($cylinders -1) & 0x300) >>2)) <<16))
pascal@7859 81 ecyl=$(( (($cylinders -1) & 0xff) <<24))
pascal@7859 82 store32 $(($e + 4)) $(($partype + (($heads - 1) <<8) +$esect +$ecyl))
pascal@7859 83 store32 $(($e + 8)) $offset
pascal@7859 84 store32 $(($e + 12)) $(($cylinders * $heads * $sectors))
pascal@4513 85 }
pascal@4513 86
pascal@7859 87 abort()
pascal@7859 88 {
pascal@7859 89 echo "$iso: $1"
pascal@4513 90 exit 1
pascal@7859 91 }
pascal@7859 92
pascal@7859 93 [ "$(readiso 17 7 23)" == "EL TORITO SPECIFICATION" ] ||
pascal@7859 94 abort "no boot record found."
pascal@7859 95 cat=$(read32 17 71)
pascal@7859 96 [ $(read32 $cat 0) -eq 1 -a $(read32 $cat 30) -eq $(( 0x88AA55 )) ] ||
pascal@7859 97 abort "invalid boot catalog."
pascal@7859 98 lba=$(read32 $cat 40)
pascal@7859 99 [ $(read32 $lba 64) -eq 1886961915 ] ||
pascal@7859 100 abort "no isolinux.bin hybrid signature in bootloader."
pascal@4513 101 size=$(stat -c "%s" $iso)
pascal@7859 102 trksz=$(( 512 * $heads * $sectors ))
pascal@7859 103 cylinders=$(( ($size + $trksz - 1) / $trksz ))
pascal@7859 104 pad=$(( (($cylinders * $trksz) - $size) / 512 ))
pascal@7859 105 [ $pad -eq 0 ] || ddq bs=512 count=$pad if=/dev/zero >> $iso
pascal@4513 106 if [ $cylinders -gt 1024 ]; then
pascal@4513 107 cat 1>&2 <<EOT
pascal@4513 108 Warning: more than 1024 cylinders ($cylinders).
pascal@4513 109 Not all BIOSes will be able to boot this device.
pascal@4513 110 EOT
pascal@4513 111 cylinders=1024
pascal@4513 112 fi
pascal@4513 113
pascal@7859 114 main <<EOT