diff options
Diffstat (limited to 'isohybrid-acritox')
| -rwxr-xr-x | isohybrid-acritox | 84 |
1 files changed, 47 insertions, 37 deletions
diff --git a/isohybrid-acritox b/isohybrid-acritox index c12edec..6bd7416 100755 --- a/isohybrid-acritox +++ b/isohybrid-acritox @@ -3,28 +3,27 @@ # # Post-process a hybrid-ISO-image generated with isohybrid-bg2 # by injecting an "Apple Partition Map" into the image and appending a HFS+-partiton -# and a FAT-partition to allow "hybrid booting" as CD-ROM (EFI or El Torito) or as -# a hard-drive on Intel-Macs (EFI) and PCs (EFI or MBR). +# and using a FAT-partition embedded as file into the ISO9660 to allow "hybrid booting" +# as CD-ROM (EFI or El Torito) or as a hard-drive on Intel-Macs (EFI) and PCs (EFI or MBR). $bs=0x0200; $block0='45520200eb5f90'; # 512 - add (%eax),%al $bs=0x0400; $block0='45520400eb5f90'; # 1024 - add $0x0,%al +$bs=0x0800; $block0='45520800eb5f90'; # 2048 - or %al,(%bx,%si) # Apple Partition Map entries: -$pm1='504d000000000002000000010000000f4170706c650000000000000000000000000000000000000000000000000000004170706c655f706172746974696f6e5f6d617000000000000000000000000000000000000000000f00000003'; -$pm2='504d00000000000200000400000005006469736b20696d616765000000000000000000000000000000000000000000004170706c655f4846530000000000000000000000000000000000000000000000000000000000040040000033'; +$pm1='504d000000000003000000010000000f4170706c650000000000000000000000000000000000000000000000000000004170706c655f706172746974696f6e5f6d617000000000000000000000000000000000000000000f00000003'; # Apple_partition_map +$pm2='504d00000000000300000400000005006469736b20696d616765000000000000000000000000000000000000000000004170706c655f4846530000000000000000000000000000000000000000000000000000000000040040000033'; # Apple_HFS +$pm3='504d00000000000300000001000004004b414e4f5449585f454649000000000000000000000000000000000000000000444f535f4641545f313200000000000000000000000000000000000000000000000000000000040040000033'; # DOS_FAT_12 -die "Usage: $0 <isohybrid-bg2.iso> <HFS+-image> <FAT-image>\n" if $#ARGV != 2; +die "Usage: $0 <isohybrid-bg2.iso> <HFS+-image> <FAT-image-filename>\n" if $#ARGV != 2; -($file, $part, $fat) = @ARGV; +($file, $part, $filename) = @ARGV; open(FILE, "+< $file\0") or die "$0: cannot open $file: $!\n"; binmode FILE; open(PART, "< $part\0") or die "$0: cannot open $part: $!\n"; binmode PART; -open(FAT, "< $fat\0") or die "$0: cannot open $fat: $!\n"; -binmode FAT; - # Check if image has already been "patched" (i.e. it has the APM signature from $block0) seek(FILE, 0, SEEK_SET) or die "$0: $file: $!\n"; read(FILE, $test, 2) == 2 or die "$0: $file: read error\n"; @@ -40,6 +39,11 @@ seek(PART, 0x400, SEEK_SET) or die "$0: $file: $!\n"; read(PART, $test, 2) == 2 or die "$0: $file: read error\n"; die "$part doesn't seem to contain a HFS+ filesystem\n" if($test ne 'H+'); +$start = `isoinfo -J -s -l -i "$file" | awk '/$filename/{print \$10}'`; +if (!$start) { + die "$0: $filename: cannot determine position of file\n"; +} + # Get the total size of the image (@imgstat = stat(FILE)) or die "$0: $file: $!\n"; $imgsize = $imgstat[7]; @@ -59,19 +63,14 @@ if (!$partsize) { die "$0: $part: cannot determine length of file\n"; } -# Get the total size of the partiton -(@fatstat = stat(FAT)) or die "$0: $part: $!\n"; -$fatsize = $fatstat[7]; -if (!$fatsize) { - die "$0: $part: cannot determine length of file\n"; -} - seek(FILE, 0, SEEK_SET) or die "$0: $file: $!\n"; print FILE pack('H*',$block0); seek(FILE, $bs*1, SEEK_SET) or die "$0: $file: $!\n"; print FILE pack('H*',$pm1); seek(FILE, $bs*2, SEEK_SET) or die "$0: $file: $!\n"; print FILE pack('H*',$pm2); +seek(FILE, $bs*3, SEEK_SET) or die "$0: $file: $!\n"; +print FILE pack('H*',$pm3); # Pad the image to a fake cylinder boundary seek(FILE, $imgstat[7], SEEK_SET) or die "$0: $file: $!\n"; @@ -92,6 +91,10 @@ if ($padding) { } $partsize += $padding; +use integer; +$lba = $start*4; +$psize = $imgsize/512 - $lba; + # Adjust $pm2 (Apple_HFS) # "physical block start" and "physical block count" of partition: seek(FILE, $bs*2+8, SEEK_SET) or die "$0: $file: $!\n"; @@ -100,6 +103,14 @@ print FILE pack('NN', $imgsize/$bs, $partsize/$bs); seek(FILE, $bs*2+80, SEEK_SET) or die "$0: $file: $!\n"; print FILE pack('NN', 0, $partsize/$bs); +# Adjust $pm3 (DOS_FAT_12) +# "physical block start" and "physical block count" of partition: +seek(FILE, $bs*3+8, SEEK_SET) or die "$0: $file: $!\n"; +print FILE pack('NN', $lba*512/$bs, $psize*512/$bs); +# "logical block start" and "logical block count" of partition: +seek(FILE, $bs*3+80, SEEK_SET) or die "$0: $file: $!\n"; +print FILE pack('NN', 0, $psize*512/$bs); + $imgsize += $partsize; seek(FILE, $imgsize, SEEK_SET) or die "$0: $file: $!\n"; @@ -112,36 +123,35 @@ if ($padding) { print FILE "\0" x $padding; } -# TODO: merge isohybrid-embeddedfat into here -exit 0; - -# Append FAT partition to image -read FAT, $partition, $fatsize; -print FILE $partition; +# Done... +close(PART); -# Pad the partition to a fake cylinder boundary -$frac = $fatsize % $cylsize; -$padding = ($frac > 0) ? $cylsize - $frac : 0; -if ($padding) { - print FILE "\0" x $padding; +# Calculate partiton table (MBR) +$psize = $imgsize/512 - $lba; +$h = 64; $s = 32; +$hpc = 32; $spt = 63; +$bcyl = $lba / ($spt * $hpc); +$bhead = ($lba / $spt) % $hpc; +$bsect = ($lba % $spt) + 1; +$cylsize = $h*$s*512; +$c = $imgsize/$cylsize; +if ($c > 1024) { + $cc = 1024; +} else { + $cc = $c; } -$fatsize += $padding; +$ehead = $h-1; +$esect = $s + ((($cc-1) & 0x300) >> 2); +$ecyl = ($cc-1) & 0xff; # Adjust MBR partition table $fstype = 0xEF; -$pentry = 2; +$pentry = 1; seek(FILE, 430+16*$pentry, SEEK_SET) or die "$0: $file: $!\n"; -print FILE pack("CCCCCCCCVV", 0x80, 0xfe, 0xff, 0xff, $fstype, 0xfe, 0xff, 0xff, $imgsize/512, $fatsize/512); - -# Delete ISO9660 partition entry from MBR-partition-table -seek(FILE, 430+16*1, SEEK_SET) or die "$0: $file: $!\n"; -print FILE "\0" x 16; - -$imgsize += $fatsize; +print FILE pack("CCCCCCCCVV", 0x80, $bhead, $bsect, $bcyl, $fstype, $ehead, $esect, $ecyl, $lba, $psize); # Done... -close(PART); close(FILE); exit 0; |