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Provide better support for overwriteable media

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This commit is contained in:
Mario Danic 2007-08-30 21:55:36 +00:00
parent f32adc5dfe
commit 4f62ad9fb3
4 changed files with 174 additions and 56 deletions
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4
libisofs/trunk/Makefile.am
View File

@ -73,8 +73,8 @@ test_isoadd_CPPFLAGS = -Ilibisofs
test_isoadd_LDADD = $(libisofs_libisofs_la_OBJECTS) $(THREAD_LIBS)
test_isoadd_SOURCES = test/iso_add.c
test_isogrow_CPPFLAGS = -Ilibisofs
test_isogrow_LDADD = $(libisofs_libisofs_la_OBJECTS) $(THREAD_LIBS)
test_isogrow_CPPFLAGS = -Ilibisofs -Ilibburn
test_isogrow_LDADD = $(libisofs_libisofs_la_OBJECTS) $(THREAD_LIBS) -lburn
test_isogrow_SOURCES = test/iso_grow.c
## Build unit test

12
libisofs/trunk/libisofs/ecma119.c
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@ -430,17 +430,19 @@ ecma119_target_new(struct iso_volset *volset,
t->total_size = (t->curblock - t->ms_block) * t->block_size;
if (opts->dvd_plus_rw) {
if (opts->overwrite) {
/*
* Get a copy of the volume descriptors to be written in a DVD+RW
* disc
*/
uint8_t *buf;
opts->vol_desc_count = 2 + (t->eltorito ? 1 : 0) +
(t->joliet ? 1 : 0);
opts->vol_desc = calloc(opts->vol_desc_count, t->block_size);
buf = opts->vol_desc;
/* set the 32 block buffer to 0 */
memset(opts->overwrite, 0, 32 * t->block_size);
/* skip the first 16 blocks (system area) */
buf = opts->overwrite + 16 * t->block_size;
/*
* In the PVM to be written in the 16th sector of the disc, we

24
libisofs/trunk/libisofs/libisofs.h
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@ -277,26 +277,12 @@ struct ecma119_source_opts {
* image, used to read file contents.
* Otherwise it can be NULL.
*/
unsigned int dvd_plus_rw:1;
uint8_t *overwrite;
/**<
* When 1, vol_desc and vol_desc_count will be filled propertly
* with information useful for "growing" a DVD+RW.
*/
uint8_t *vol_desc;
/**<
* If dvd_plus_rw is set to one, this will be filled with a
* pointer to a memory region containing a copy of the
* volume descriptors of the image, including the volume
* descriptor set terminator.
* A suitable program can write the contents of this memory
* region from sector 16 of a DVD+RW to "grow" its image.
* The size of this region will be vol_desc_count * 2048 and
* should be freed by user when no more needed.
*/
int vol_desc_count;
/**<
* If dvd_plus_rw is set to one, this will be filled with the
* number of volume descriptors written to vol_desc.
* When not NULL, it should point to a buffer of at least
* 64KiB, where libisofs will write the contents that should
* be written at the beginning of a overwriteable media, to
* grow the image.
*/
};

188
libisofs/trunk/test/iso_grow.c
View File

@ -24,6 +24,8 @@ const char * const optstring = "JRL:h";
extern char *optarg;
extern int optind;
static struct data_source *libburn_data_source_new(struct burn_drive *d);
void usage()
{
printf("test [OPTIONS] DISC DIRECTORY\n");
@ -42,20 +44,18 @@ void help()
int main(int argc, char **argv)
{
struct burn_drive_info *drives;
struct burn_drive *drive;
struct ecma119_source_opts wopts;
struct ecma119_read_opts ropts;
struct data_source *rsrc;
struct iso_volset *volset;
struct iso_volume *volume;
struct iso_tree_node_dir *root;
struct burn_source *wsrc;
unsigned char buf[2048];
int fd;
int c;
int constraints;
struct iso_tree_radd_dir_behavior behav = {0,0,0};
int level=1, flags=0;
char *boot_img = NULL;
int ret = 0;
while ((c = getopt(argc, argv, optstring)) != -1) {
switch(c) {
@ -94,13 +94,44 @@ int main(int argc, char **argv)
if (!iso_init()) {
err(1, "Can't init libisofs");
}
if (!burn_initialize()) {
err(1, "Can't init libburn");
}
iso_msgs_set_severities("NEVER", "ALL", "");
burn_msgs_set_severities("NEVER", "SORRY", "libburner : ");
printf("Reading from %s\n", argv[optind]);
rsrc = data_source_from_file(argv[optind]);
if (burn_drive_scan_and_grab(&drives, argv[optind], 0) != 1) {
err(1, "Can't open device. Are you sure it is a valid drive?\n");
}
drive = drives[0].drive;
{
/* some check before going on */
enum burn_disc_status state;
int pno;
char name[80];
state = burn_disc_get_status(drive);
burn_disc_get_profile(drive, &pno, name);
// my drives report BURN_DISC_BLANK on a DVD+RW with data.
// is that correct?
if ( (pno != 0x1a) /*|| (state != BURN_DISC_FULL)*/ ) {
printf("You need to insert a DVD+RW with some data.\n");
printf("Profile: %x, state: %d.\n", pno, state);
ret = 1;
goto exit_cleanup;
}
}
rsrc = libburn_data_source_new(drive);
if (rsrc == NULL) {
printf ("Can't open device\n");
return 1;
printf ("Can't create data source.\n");
ret = 1;
goto exit_cleanup;
}
ropts.block = 0; /* image always start on first block */
@ -114,7 +145,8 @@ int main(int argc, char **argv)
if (volset == NULL) {
printf ("Error reading image\n");
return 1;
ret = 1;
goto exit_cleanup;
}
printf("Image size: %d blocks.\n", ropts.size);
@ -134,38 +166,136 @@ int main(int argc, char **argv)
wopts.input_charset = "UTF-8";
wopts.ouput_charset = "UTF-8";
wopts.ms_block = ropts.size;
wopts.dvd_plus_rw = 1;
wopts.overwrite = malloc(32*2048);
wsrc = iso_source_new_ecma119(volset, &wopts);
fd = open(argv[optind], O_WRONLY);
if ( fd == -1 ) {
printf ("Can't write to disc\n");
return 1;
}
printf("HERE %d\n", wopts.vol_desc_count);
/* a. write the new image */
printf("Adding new data...\n");
if ( lseek(fd, ropts.size * 2048, SEEK_SET) == (off_t) -1) {
printf ("Can't seek to new location\n");
return 1;
}
{
struct burn_disc *target_disc;
struct burn_session *session;
struct burn_write_opts *burn_options;
struct burn_track *track;
struct burn_progress progress;
char reasons[BURN_REASONS_LEN];
target_disc = burn_disc_create();
session = burn_session_create();
burn_disc_add_session(target_disc, session, BURN_POS_END);
track = burn_track_create();
burn_track_set_source(track, wsrc);
burn_session_add_track(session, track, BURN_POS_END);
burn_options = burn_write_opts_new(drive);
burn_drive_set_speed(drive, 0, 0);
burn_write_opts_set_underrun_proof(burn_options, 1);
//mmm, check for 32K alignment?
burn_write_opts_set_start_byte(burn_options, ropts.size * 2048);
if (burn_write_opts_auto_write_type(burn_options, target_disc,
reasons, 0) == BURN_WRITE_NONE) {
printf("Failed to find a suitable write mode:\n%s\n", reasons);
ret = 1;
goto exit_cleanup;
}
/* ok, write the new track */
burn_disc_write(burn_options, target_disc);
burn_write_opts_free(burn_options);
while (burn_drive_get_status(drive, NULL) == BURN_DRIVE_SPAWNING)
usleep(1002);
while (burn_drive_get_status(drive, &progress) != BURN_DRIVE_IDLE) {
printf("Writing: sector %d of %d\n", progress.sector, progress.sectors);
sleep(1);
}
while (wsrc->read(wsrc, buf, 2048) == 2048) {
write(fd, buf, 2048);
}
/* b. write the new vol desc */
printf("Writing the new vol desc...\n");
if ( lseek(fd, 16 * 2048, SEEK_SET) == (off_t) -1) {
printf ("Can't seek to 16th sector\n");
return 1;
}
write(fd, wopts.vol_desc, 2048 * wopts.vol_desc_count);
fsync(fd);
close(fd);
if ( burn_random_access_write(drive, 0, wopts.overwrite, 32*2048, 0) != 1) {
printf("Ups, new vol desc write failed\n");
}
free(wopts.overwrite);
iso_volset_free(volset);
exit_cleanup:;
burn_drive_release(drives[0].drive, 0);
burn_finish();
iso_finish();
exit(ret);
}
struct disc_data_src {
struct burn_drive *d;
int nblocks;
};
static int
libburn_ds_read_block(struct data_source *src, int lba, unsigned char *buffer)
{
struct disc_data_src *data;
off_t data_count;
assert(src && buffer);
data = (struct disc_data_src*)src->data;
/* if (lba >= data->nblocks)
* return BLOCK_OUT_OF_FILE;
*/
if ( burn_read_data(data->d, (off_t) lba * (off_t) 2048, buffer, 2048,
&data_count, 0) < 0 ) {
return -1; //error
}
return 0;
}
static int
libburn_ds_get_size(struct data_source *src)
{
struct disc_data_src *data;
assert(src);
data = (struct disc_data_src*)src->data;
return data->nblocks;
}
static void
libburn_ds_free_data(struct data_source *src)
{
free(src->data);
}
static struct data_source *
libburn_data_source_new(struct burn_drive *d)
{
struct disc_data_src *data;
struct data_source *ret;
assert(d);
data = malloc(sizeof(struct disc_data_src));
data->d = d;
//should be filled with the size of disc (or track?)
data->nblocks = 0;
ret = malloc(sizeof(struct data_source));
ret->refcount = 1;
ret->read_block = libburn_ds_read_block;
ret->get_size = libburn_ds_get_size;
ret->free_data = libburn_ds_free_data;
ret->data = data;
return ret;
}