From d3816073d3f110a57cd75f30d47bd06fcb94f601 Mon Sep 17 00:00:00 2001
From: Andreas Loibl <andreas@andreas-loibl.de>
Date: Fri, 17 Feb 2012 00:30:53 +0100
Subject: added hybrid-ISO feature: embedded partiton with ISO offset
---
config/binary_iso/isoimage.sort | 7 +-
config/binary_local-hooks/mkembeddediso | 21 ++++++
isohybrid-acritox | 129 +++++++++++++++++++++++++++++++-
3 files changed, 150 insertions(+), 7 deletions(-)
create mode 100755 config/binary_local-hooks/mkembeddediso
diff --git a/config/binary_iso/isoimage.sort b/config/binary_iso/isoimage.sort
index 1495a1d..5ae4594 100644
--- a/config/binary_iso/isoimage.sort
+++ b/config/binary_iso/isoimage.sort
@@ -1,6 +1,7 @@
-binary/boot.catalog +4
-binary/boot.isohybrid +3
-binary/boot.efi.img +2
+binary/boot.catalog +9
+binary/boot.isohybrid +7
+binary/boot.efi.img +5
+binary/boot.iso.img +3
binary/boot +1
binary/*/*.squashfs -1
binary/*.squashfs -1
diff --git a/config/binary_local-hooks/mkembeddediso b/config/binary_local-hooks/mkembeddediso
new file mode 100755
index 0000000..c2e4ce9
--- /dev/null
+++ b/config/binary_local-hooks/mkembeddediso
@@ -0,0 +1,21 @@
+#! /bin/sh
+# mkembeddediso - written by Andreas Loibl <andreas@andreas-loibl.de>
+#
+# Generate space on the ISO for an offset copy of the ISO file table
+
+case "$LB_BOOTLOADER" in
+grub2|burg)
+ ;;
+*)
+ exit 0
+ ;;
+esac
+
+
+img=binary/boot.iso.img
+[ "$1" ] && img="$1"
+rm -f "$img"
+
+dd if=/dev/zero bs=512k count=1 of="$img" >/dev/null 2>/dev/null
+
+exit 0
diff --git a/isohybrid-acritox b/isohybrid-acritox
index 6bd7416..60ee8eb 100755
--- a/isohybrid-acritox
+++ b/isohybrid-acritox
@@ -15,9 +15,18 @@ $pm1='504d000000000003000000010000000f4170706c6500000000000000000000000000000000
$pm2='504d00000000000300000400000005006469736b20696d616765000000000000000000000000000000000000000000004170706c655f4846530000000000000000000000000000000000000000000000000000000000040040000033'; # Apple_HFS
$pm3='504d00000000000300000001000004004b414e4f5449585f454649000000000000000000000000000000000000000000444f535f4641545f313200000000000000000000000000000000000000000000000000000000040040000033'; # DOS_FAT_12
-die "Usage: $0 <isohybrid-bg2.iso> <HFS+-image> <FAT-image-filename>\n" if $#ARGV != 2;
+die "Usage: $0 <isohybrid-bg2.iso> <HFS+-image>\n" if $#ARGV != 1;
-($file, $part, $filename) = @ARGV;
+# name of the first file in the ISO
+$first_filename="boot.catalog";
+
+# name of the file containing the EFI-FAT-image
+$filename="boot.efi.img";
+
+# name of the file to be used as ISO-offset-destination
+$embiso_filename="boot.iso.img";
+
+($file, $part) = @ARGV;
open(FILE, "+< $file\0") or die "$0: cannot open $file: $!\n";
binmode FILE;
@@ -39,11 +48,21 @@ 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}'`;
+$start = int(`isoinfo -R -s -l -i "$file" | awk '/$filename/{print \$10}'`);
if (!$start) {
die "$0: $filename: cannot determine position of file\n";
}
+$embiso_start = int(`isoinfo -R -s -l -i "$file" | awk '/$embiso_filename/{print \$10}'`);
+if (!$embiso_start) {
+ die "$0: $embiso_filename: cannot determine position of file\n";
+}
+
+$start_of_files = int(`isoinfo -R -s -l -i "$file" | awk '/$first_filename/{print \$10}'`);
+if (!$start_of_files) {
+ die "$0: $first_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];
@@ -93,6 +112,7 @@ $partsize += $padding;
use integer;
$lba = $start*4;
+$embiso_lba = $embiso_start*4;
$psize = $imgsize/512 - $lba;
# Adjust $pm2 (Apple_HFS)
@@ -127,7 +147,7 @@ if ($padding) {
close(PART);
# Calculate partiton table (MBR)
-$psize = $imgsize/512 - $lba;
+$psize = $embiso_lba - $lba;
$h = 64; $s = 32;
$hpc = 32; $spt = 63;
$bcyl = $lba / ($spt * $hpc);
@@ -151,7 +171,108 @@ $pentry = 1;
seek(FILE, 430+16*$pentry, SEEK_SET) or die "$0: $file: $!\n";
print FILE pack("CCCCCCCCVV", 0x80, $bhead, $bsect, $bcyl, $fstype, $ehead, $esect, $ecyl, $lba, $psize);
+$psize = $imgsize/512 - $embiso_lba;
+$bcyl = $embiso_lba / ($spt * $hpc);
+$bhead = ($embiso_lba / $spt) % $hpc;
+$bsect = ($embiso_lba % $spt) + 1;
+$ehead = $h-1;
+$esect = $s + ((($cc-1) & 0x300) >> 2);
+$ecyl = ($cc-1) & 0xff;
+
+$fstype = 0x83;
+$pentry = 2;
+
+seek(FILE, 430+16*$pentry, SEEK_SET) or die "$0: $file: $!\n";
+print FILE pack("CCCCCCCCVV", 0x80, $bhead, $bsect, $bcyl, $fstype, $ehead, $esect, $ecyl, $embiso_lba, $psize);
+
+# Done...
+close(FILE);
+
+# Embed a copy of the ISO filesystem into the ISO at the second partition (= start_of_block1)
+print("dd if=$file bs=2048 count=$start_of_files of=$file seek=$embiso_start conv=notrunc\n");
+system("dd if=$file bs=2048 count=$start_of_files of=$file seek=$embiso_start conv=notrunc");
+
+$off = $bs*$embiso_start;
+$diff = $embiso_start;
+
+open(FILE, "+< $file\0") or die "$0: cannot open $file: $!\n";
+binmode FILE;
+
+sub write_val
+{
+ my($offset, $value) = @_;
+ $cur = tell(FILE);
+ $offset += $cur if $offset < 0;
+ printf("byte-offset: 0x%X -> 0x%X\n", $offset, $offset-$diff*$bs);
+ seek(FILE, $offset, SEEK_SET);
+ print FILE $value;
+ seek(FILE, $cur, SEEK_SET);
+}
+
+$off_pvd = $off+0x8000;
+do
+{
+ seek(FILE, $off_pvd, SEEK_SET) or die "$0: $file: $!\n";
+ read(FILE, $voldesc_head, 7) > 0 or die "$0: $file: read error\n";
+ ($type, $magic, $version) = unpack("Ca[5]C", $voldesc_head);
+ if($type == 1)
+ {
+ seek(FILE, 0x97, 1);
+ read(FILE, $voldesc, 8) > 0 or die "$0: $file: read error\n";
+ ($first_sector, $first_sector_be) = unpack("VN", $voldesc);
+ seek(FILE, $off+$first_sector*$bs, SEEK_SET) or die "$0: $file: $!\n";
+ printf("root-directory entry at 0x%X:\n", tell(FILE));
+ read(FILE, $bytes, 1) > 0 or die "$0: $file: read error\n";
+ $bytes = unpack("C", $bytes) - 1; $sector = 0;
+ do {
+ printf("SUSP entry - %u bytes (0x%X)\n", $bytes+1, $bytes+1);
+ do {
+ $wp = tell(FILE);
+ $bytes -= read(FILE, $voldesc, 32);
+ ($ext_sectors, $lba, $lba_be, $size, $size_be, $uu, $namelen)
+ = unpack("CVNVNa[14]C", $voldesc);
+ if($lba > $diff)
+ {
+ printf("LBA 0x%x -> LBA 0x%x\n", $lba, $lba - $diff);
+ write_val($wp+1, pack("VN", $lba - $diff, $lba - $diff));
+ }
+ $namelen++ if $namelen % 2 == 0;
+ $bytes -= read(FILE, $name, $namelen);
+ $filename = unpack("Z*", $name);
+ print("file: $filename\n");
+
+ $bytes -= read(FILE, $sua_head, 4);
+ ($sig, $len, $version) = unpack("a[2]CC", $sua_head);
+ $len -= 4;
+ $bytes -= read(FILE, $data, $len);
+ do {
+ $bytes -= read(FILE, $sua_head, 4);
+ ($sig, $len, $version) = unpack("a[2]CCa", $sua_head);
+ $len -= 4;
+ $bytes -= read(FILE, $data, $len);
+ if($sig eq "CE")
+ {
+ ($sua_block, $uu1, $sua_pos, $uu2, $sua_size, $uu3) = unpack("VNVNVN", $data);
+ printf("CE is at LBA 0x%X -> 0x%x\n", $sua_block);
+ }
+ } while($bytes > 4);
+ $bytes -= read(FILE, $uu, $bytes) if $bytes > 0; # skip bytes (if unaligned)
+ read(FILE, $bytes, 1) > 0 or die "$0: $file: read error\n";
+ $bytes = unpack("C", $bytes) - 1;
+ printf("SUSP Entry - %u bytes (0x%X)\n", $bytes+1, $bytes+1);
+ } while $bytes > 0;
+ $sector++;
+ seek(FILE, $off+$first_sector*$bs+$sector*$bs, SEEK_SET) or die "$0: $file: $!\n";
+ printf("\ndirectory entry at 0x%X:\n", tell(FILE));
+ read(FILE, $bytes, 1) > 0 or break;
+ $bytes = unpack("C", $bytes) - 1;
+ } while $bytes != 0x21 && $bytes != 0;
+ }
+ $off_pvd+=$bs;
+} while $type != 255;
+
# Done...
close(FILE);
exit 0;
+
--
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