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Recognizing the newly introduced consequences of protective msdos label

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with alternative grub-mkrescue boot layouts.
This commit is contained in:
Thomas Schmitt
2016-04-20 20:11:57 +02:00
parent eb09bcf9e5
commit 03662f0832
1 changed files with 7 additions and 1 deletions
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8
libisofs/fs_image.c
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@ -3968,13 +3968,19 @@ int iso_analyze_mbr(IsoImage *image, IsoDataSource *src, int flag)
is_grub2_mbr = 1;
}
if (sai->mbr_req_count >= 1 && !is_isohybrid) {
if (sai->mbr_req_count >= 1 &&
(sai->mbr_req[0]->type_byte == 0xee || !is_isohybrid)) {
part = sai->mbr_req[0];
part2_start = 0;
if (sai->mbr_req_count >= 2)
part2_start = sai->mbr_req[1]->start_block;
if (part->start_block == 1 &&
(part->block_count + 1 == ((uint64_t) sai->image_size) * 4 ||
(part->type_byte == 0xee &&
part->block_count + 1 >= ((uint64_t) sai->image_size) * 4 &&
(sai->mbr_req_count == 1 ||
(sai->mbr_req_count == 2 &&
sai->mbr_req[1]->type_byte == 0x00))) ||
part->block_count + 1 == part2_start)) {
/* libisofs protective msdos label for GRUB2 */
is_protective_label = 1;