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Patch isolinux image before image writing. 

Currently isolinux images are patching on-the-fly during image writing, and
that can be a problem on multisession images, as we may be reading the
old image after begining the burning of the new session. That is not supported
in several media and lead to burning failure. Fixed by caching the patched
image on memory.
This commit is contained in:
Vreixo Formoso 2008-09-29 22:33:26 +02:00
parent 65252934de
commit 89b0e9da68
1 changed files with 37 additions and 37 deletions
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74
libisofs/eltorito.c
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@ -743,42 +743,6 @@ int el_torito_catalog_file_src_create(Ecma119Image *target, IsoFileSrc **src)
/******************* EL-TORITO WRITER *******************************/
static
int eltorito_writer_compute_data_blocks(IsoImageWriter *writer)
{
/* nothing to do, the files are written by the file writer */
return ISO_SUCCESS;
}
/**
* Write the Boot Record Volume Descriptor (ECMA-119, 8.2)
*/
static
int eltorito_writer_write_vol_desc(IsoImageWriter *writer)
{
Ecma119Image *t;
struct el_torito_boot_catalog *cat;
struct ecma119_boot_rec_vol_desc vol;
if (writer == NULL) {
return ISO_NULL_POINTER;
}
t = writer->target;
cat = t->catalog;
iso_msg_debug(t->image->id, "Write El-Torito boot record");
memset(&vol, 0, sizeof(struct ecma119_boot_rec_vol_desc));
vol.vol_desc_type[0] = 0;
memcpy(vol.std_identifier, "CD001", 5);
vol.vol_desc_version[0] = 1;
memcpy(vol.boot_sys_id, "EL TORITO SPECIFICATION", 23);
iso_lsb(vol.boot_catalog, t->cat->sections[0].block, 4);
return iso_write(t, &vol, sizeof(struct ecma119_boot_rec_vol_desc));
}
/**
* Patch an isolinux boot image.
*
@ -826,7 +790,7 @@ int patch_boot_image(uint8_t *buf, Ecma119Image *t, size_t imgsize)
}
static
int eltorito_writer_write_data(IsoImageWriter *writer)
int eltorito_writer_compute_data_blocks(IsoImageWriter *writer)
{
/*
* We have nothing to write, but if we need to patch an isolinux image,
@ -880,6 +844,42 @@ int eltorito_writer_write_data(IsoImageWriter *writer)
return ISO_SUCCESS;
}
/**
* Write the Boot Record Volume Descriptor (ECMA-119, 8.2)
*/
static
int eltorito_writer_write_vol_desc(IsoImageWriter *writer)
{
Ecma119Image *t;
struct el_torito_boot_catalog *cat;
struct ecma119_boot_rec_vol_desc vol;
if (writer == NULL) {
return ISO_NULL_POINTER;
}
t = writer->target;
cat = t->catalog;
iso_msg_debug(t->image->id, "Write El-Torito boot record");
memset(&vol, 0, sizeof(struct ecma119_boot_rec_vol_desc));
vol.vol_desc_type[0] = 0;
memcpy(vol.std_identifier, "CD001", 5);
vol.vol_desc_version[0] = 1;
memcpy(vol.boot_sys_id, "EL TORITO SPECIFICATION", 23);
iso_lsb(vol.boot_catalog, t->cat->sections[0].block, 4);
return iso_write(t, &vol, sizeof(struct ecma119_boot_rec_vol_desc));
}
static
int eltorito_writer_write_data(IsoImageWriter *writer)
{
/* nothing to do, the files are written by the file writer */
return ISO_SUCCESS;
}
static
int eltorito_writer_free_data(IsoImageWriter *writer)
{