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New API call iso_write_opts_set_iso_mbr_part_type()

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This commit is contained in:
Thomas Schmitt 2017-02-27 09:59:34 +01:00
parent 094b3f7546
commit e66b9bfe0c
5 changed files with 67 additions and 10 deletions
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11
libisofs/ecma119.c
View File

@ -1,7 +1,7 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2007 Mario Danic
* Copyright (c) 2009 - 2016 Thomas Schmitt
* Copyright (c) 2009 - 2017 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -3483,6 +3483,7 @@ int iso_write_opts_new(IsoWriteOpts **opts, int profile)
wopts->appended_as_gpt = 0;
wopts->appended_as_apm = 0;
wopts->part_like_isohybrid = 0;
wopts->iso_mbr_part_type = -1;
wopts->ascii_disc_label[0] = 0;
wopts->will_cancel = 0;
wopts->allow_dir_id_ext = 0;
@ -4218,6 +4219,14 @@ int iso_write_opts_set_part_like_isohybrid(IsoWriteOpts *opts, int alike)
return ISO_SUCCESS;
}
int iso_write_opts_set_iso_mbr_part_type(IsoWriteOpts *opts, int part_type)
{
if (part_type < -1 || part_type > 255)
part_type = -1;
opts->iso_mbr_part_type = part_type;
return ISO_SUCCESS;
}
int iso_write_opts_set_disc_label(IsoWriteOpts *opts, char *label)
{
strncpy(opts->ascii_disc_label, label, ISO_DISC_LABEL_SIZE - 1);

10
libisofs/ecma119.h
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2009 - 2015 Thomas Schmitt
* Copyright (c) 2009 - 2017 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -496,6 +496,14 @@ struct iso_write_opts {
*/
int part_like_isohybrid;
/* The type to use for the mountable ISO partition if there is any and if
the type is not mandatorily determined for particular circumstances like
compliant GPT, CHRP, or PReP.
-1 = use the default value (e.g. 0xcd, 0x83, 0x17)
0x00 to 0xff = value to use if possible
*/
int iso_mbr_part_type;
/* Eventual name of the non-ISO aspect of the image. E.g. SUN ASCII label.
*/
char ascii_disc_label[ISO_DISC_LABEL_SIZE];

17
libisofs/libisofs.h
View File

@ -4,7 +4,7 @@
/*
* Copyright (c) 2007-2008 Vreixo Formoso, Mario Danic
* Copyright (c) 2009-2016 Thomas Schmitt
* Copyright (c) 2009-2017 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
@ -2749,6 +2749,21 @@ int iso_write_opts_set_appended_as_apm(IsoWriteOpts *opts, int apm);
*/
int iso_write_opts_set_part_like_isohybrid(IsoWriteOpts *opts, int alike);
/**
* Set the partition type of the MBR partition which represents the ISO
* filesystem or at least protects it.
* This is without effect if no such partition emerges by other settings or
* if the partition type is prescribed mandatorily like 0xee for GPT protective
* MBR or 0x96 for CHRP.
* @param opts
* The option set to be manipulated.
* @param part_type
* 0x00 to 0xff as desired partition type.
* Any other value (e.g. -1) enables the default types of the various
* occasions.
* @since 1.4.8
*/
int iso_write_opts_set_iso_mbr_part_type(IsoWriteOpts *opts, int part_type);
/**
* Inquire the start address of the file data blocks after having used

1
libisofs/libisofs.ver
View File

@ -330,6 +330,7 @@ iso_write_opts_set_hfsp_serial_number;
iso_write_opts_set_hfsplus;
iso_write_opts_set_iso1999;
iso_write_opts_set_iso_level;
iso_write_opts_set_iso_mbr_part_type;
iso_write_opts_set_joliet;
iso_write_opts_set_joliet_long_names;
iso_write_opts_set_joliet_longer_paths;

38
libisofs/system_area.c
View File

@ -1918,6 +1918,9 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
pml_blocks = gpt_blocks;
} else {
part_type = 0xcd;
if (t->opts->iso_mbr_part_type >= 0 &&
t->opts->iso_mbr_part_type <= 255)
part_type= t->opts->iso_mbr_part_type;
pml_blocks = img_blocks;
}
ret = make_grub_msdos_label(pml_blocks, t->partition_secs_per_head,
@ -1942,8 +1945,12 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
if (gpt_count > 0 || apm_count > 0)
part_type = 0x00;
else
else {
part_type = 0x17;
if (t->opts->iso_mbr_part_type >= 0 &&
t->opts->iso_mbr_part_type <= 255)
part_type= t->opts->iso_mbr_part_type;
}
if (t->opts->appended_as_gpt && t->have_appended_partitions) {
part_type = 0xee;
@ -1985,9 +1992,13 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
} else if ((t->opts->partition_offset > 0 || will_append) &&
sa_type == 0 && t->mbr_req_count == 0) {
/* Write a simple partition table. */
part_type = 0xcd;
if (t->opts->iso_mbr_part_type >= 0 &&
t->opts->iso_mbr_part_type <= 255)
part_type= t->opts->iso_mbr_part_type;
ret = make_grub_msdos_label(img_blocks, t->partition_secs_per_head,
t->partition_heads_per_cyl,
(uint8_t) 0xcd, buf, 2);
(uint8_t) part_type, buf, 2);
if (ret != ISO_SUCCESS) /* error should never happen */
return ISO_ASSERT_FAILURE;
risk_of_ee = 1;
@ -2007,7 +2018,11 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
} else if (t->opts->partition_offset == 0) {
/* Re-write partion entry 1 : start at 0, type Linux */
blk = ((uint64_t) img_blocks) * 4 - t->post_iso_part_pad / 512;
ret = write_mbr_partition_entry(1, 0x83, (uint64_t) 0, blk,
part_type = 0x83;
if (t->opts->iso_mbr_part_type >= 0 &&
t->opts->iso_mbr_part_type <= 255)
part_type= t->opts->iso_mbr_part_type;
ret = write_mbr_partition_entry(1, part_type, (uint64_t) 0, blk,
t->partition_secs_per_head, t->partition_heads_per_cyl,
buf, 2);
if (ret < 0)
@ -2087,7 +2102,11 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
iso_msgs_submit(0,
"Prevented partition type 0xEE in MBR without GPT",
0, "WARNING", 0);
buf[446 + 16 * i + 4] = 0xcd;
part_type = 0xcd;
if (t->opts->iso_mbr_part_type >= 0 &&
t->opts->iso_mbr_part_type <= 255)
part_type= t->opts->iso_mbr_part_type;
buf[446 + 16 * i + 4] = (uint8_t) part_type;
}
}
}
@ -2821,7 +2840,7 @@ static int partprepend_writer_compute_data_blocks(IsoImageWriter *writer)
{
Ecma119Image *t;
IsoFileSrc *src;
int ret, will_have_gpt = 0, with_chrp = 0, i;
int ret, will_have_gpt = 0, with_chrp = 0, i, part_type;
static uint8_t zero_uuid[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
static uint64_t gpt_flags = (((uint64_t) 1) << 60) | 1;
uint8_t gpt_name[72];
@ -2893,11 +2912,16 @@ static int partprepend_writer_compute_data_blocks(IsoImageWriter *writer)
}
if (t->prep_part_size > 0 || t->opts->fat || will_have_gpt) {
/* Protecting MBR entry for ISO start or whole ISO */
part_type = 0xcd;
if (t->opts->iso_mbr_part_type >= 0 &&
t->opts->iso_mbr_part_type <= 255)
part_type= t->opts->iso_mbr_part_type;
if (will_have_gpt)
part_type = 0xee;
ret = iso_quick_mbr_entry(t->mbr_req, &(t->mbr_req_count),
will_have_gpt ? (uint64_t) 1 :
((uint64_t) t->opts->partition_offset) * 4,
(uint64_t) 0,
will_have_gpt ? 0xee : 0xcd, 0, 0);
(uint64_t) 0, part_type, 0, 0);
if (ret < 0)
return ret;
}