Some initial code for libisofs related wraps.

This commit is contained in:
Vreixo Formoso Lopes 2007-09-06 16:57:22 +00:00
parent ffc4b67c77
commit 133a49ae17
1 changed files with 98 additions and 11 deletions

View File

@ -9,6 +9,16 @@
Copyright 2007 Vreixo Formoso Lopes <metalpain2002@yahoo.es> Copyright 2007 Vreixo Formoso Lopes <metalpain2002@yahoo.es>
*/ */
#include <stdlib.h>
#include <string.h>
#include "../libisofs/libisofs.h"
#include "../libburn/libburn.h"
#include "isoburn.h"
// TODO this are libisofs internals, should then be imported here?
#include "../libisofs/util.h"
#include "../libisofs/ecma119.h"
/* Vreixo: /* Vreixo:
@ -25,11 +35,21 @@
/* API function. See libisoburn.h /* API function. See libisoburn.h
*/ */
int isoburn_update_iso_descriptors(struct burn_drive *drive) int isoburn_activate_session(struct burn_drive *drive)
{ {
int ret;
struct isoburn *o;
/* >>> code <<< */ ret = isoburn_find_emulator(&o, drive, 0);
if (ret < 0)
return -1;
if (o->emulation_mode != 1)
return 1; /* don't need to activate session */
ret = burn_random_access_write(drive, 0, o->target_iso_head, 64*2048, 0);
return ret;
} }
@ -40,9 +60,26 @@ int isoburn_update_iso_descriptors(struct burn_drive *drive)
*/ */
int isoburn_new_rwopts(struct isoburn *o) int isoburn_new_rwopts(struct isoburn *o)
{ {
struct ecma119_source_opts *wopts;
/* >>> code <<< */ /* >>> code <<< */
/* create and initialize target_ropts read options */
o->target_ropts = calloc(1, sizeof(struct ecma119_read_opts));
if (!p->target_ropts)
return -1;
/* TODO mmm, maybe we don't need struct ecma119_read_opts in libisoburn */
/* create and initialize new_wopts write options for new image */
wopts = calloc(1, sizeof(struct ecma119_source_opts));
if (!wopts)
return -1;
wopts->overwrite = o->target_iso_head;
o->new_wopts = wopts;
return 1;
} }
@ -53,9 +90,9 @@ int isoburn_new_rwopts(struct isoburn *o)
*/ */
int isoburn_free_rwopts(struct isoburn *o) int isoburn_free_rwopts(struct isoburn *o)
{ {
free(o->target_ropts);
/* >>> code <<< */ free(o->new_wopts);
return 1;
} }
@ -67,12 +104,60 @@ int isoburn_free_rwopts(struct isoburn *o)
*/ */
int isoburn_start_emulation(struct isoburn *o, int flag) int isoburn_start_emulation(struct isoburn *o, int flag)
{ {
int ret;
off_t *data_count;
struct burn_drive *drive;
struct ecma119_pri_vol_desc *pvm;
/* >>> code <<< */ drive= o->drive;
/* we can assume 0 as start block for image */
// TODO what about ms? where we validate valid iso image in ms disc?
ret = burn_read_data(drive, (off_t) 0, o->target_iso_head,
sizeof(o->target_iso_head), &data_count, 0);
if (ret <= 0)
return -1;
pvm = (struct ecma119_pri_vol_desc *)(o->target_iso_head + 16 * 2048);
/* sanity check */
if (pvm->vol_desc_type[0] != 1 || pvm->vol_desc_version[0] != 1
|| pvm->file_structure_version[0] != 1 ) {
// TODO unsupported image type, maybe not image or damaged image
// should this be an error?
return -2;
}
if (!strncmp((char*)pvm->std_identifier, "CD001", 5)) {
off_t size;
/* ok, PVM found, set size */
size = (off_t) iso_read_lsb(pvm->vol_space_size, 4);
size *= (off_t) 2048; /* block size in bytes */
// TODO where I get the struct burn_write_opts * from?
// why that function doesn't receive a struct isoburn
isoburn_write_opts_set_start_byte(XXXXXX, size);
} else if (!strncmp((char*)pvm->std_identifier, "CDXX1", 5)) {
/* empty image */
// TODO where I get the struct burn_write_opts * from?
// why that function doesn't receive a struct isoburn
isoburn_write_opts_set_start_byte(XXXXXX, (off_t) 0);
} else {
// TODO not valid iso image
// should this be an error?
return -2;
}
return 1;
} }
// TODO why read is needed? can't I assume 64k are already cached?
// TODO can I assume isoburn_start_emulation was already called and
// disc contains a valid image?
// TODO why "The result shall especially keep libisofs from accepting the
// media image as ISO filesystem"?
/** Reads, alters and writes the first 64 kB of a "media" to invalidate /** Reads, alters and writes the first 64 kB of a "media" to invalidate
an ISO image. (It shall stay restorable by skilled humans, though). an ISO image. (It shall stay restorable by skilled humans, though).
The result shall especially keep libisofs from accepting the media The result shall especially keep libisofs from accepting the media
@ -83,9 +168,11 @@ int isoburn_start_emulation(struct isoburn *o, int flag)
*/ */
int isoburn_invalidate_iso(struct isoburn *o, int flag) int isoburn_invalidate_iso(struct isoburn *o, int flag)
{ {
/*
/* >>> code <<< */ * replace CD001 with CDXX1 in PVM.
* I think this is enought for invalidating an iso image
*/
strncpy(o->target_iso_head + 16 * 2048 + 1, "CDXX1", 5);
return isoburn_activate_session(o->drive);
} }