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libisofs/demo/iso_grow.c

258 lines
6.7 KiB

/*
* Very simple program to show how to grow an iso image.
*/
#include "libisofs.h"
#include "libburn/libburn.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
static IsoDataSource *libburn_data_source_new(struct burn_drive *d);
void usage(char **argv)
{
printf("%s DISC DIRECTORY\n", argv[0]);
}
int main(int argc, char **argv)
{
int result;
IsoImage *image;
IsoDataSource *src;
struct burn_source *burn_src;
struct burn_drive_info *drives;
struct burn_drive *drive;
unsigned char buf[32 * 2048];
IsoWriteOpts *opts;
int ret = 0;
struct iso_read_image_features *features;
uint32_t ms_block;
IsoReadOpts *ropts;
if (argc < 3) {
usage(argv);
return 1;
}
iso_init();
iso_set_msgs_severities("NEVER", "ALL", "");
/* create the image context */
result = iso_image_new("volume_id", &image);
if (result < 0) {
printf ("Error creating image\n");
return 1;
}
iso_tree_set_follow_symlinks(image, 0);
iso_tree_set_ignore_hidden(image, 0);
if (!burn_initialize()) {
err(1, "Can't init libburn");
}
burn_msgs_set_severities("NEVER", "SORRY", "libburner : ");
if (burn_drive_scan_and_grab(&drives, argv[1], 0) != 1) {
err(1, "Can't open device. Are you sure it is a valid drive?\n");
}
drive = drives[0].drive;
#ifdef ISO_GROW_CHECK_MEDIA
{
/* 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;
}
}
#endif
/* create the data source to accesss previous image */
src = libburn_data_source_new(drive);
if (src == NULL) {
printf("Can't create data source.\n");
ret = 1;
goto exit_cleanup;
}
/* import previous image */
ret = iso_read_opts_new(&ropts, 0);
if (ret < 0) {
fprintf(stderr, "Error creating read options\n");
return 1;
}
result = iso_image_import(image, src, ropts, &features);
iso_data_source_unref(src);
if (result < 0) {
printf ("Error importing previous session %d\n", result);
return 1;
}
iso_read_opts_free(ropts);
iso_tree_set_replace_mode(image, ISO_REPLACE_IF_NEWER);
/* add new dir */
result = iso_tree_add_dir_rec(image, iso_image_get_root(image), argv[2]);
if (result < 0) {
printf ("Error adding directory %d\n", result);
return 1;
}
/* generate a multisession image with new contents */
result = iso_write_opts_new(&opts, 1);
if (result < 0) {
printf("Cant create write opts, error %d\n", result);
return 1;
}
/* round up to 32kb aligment = 16 block */
ms_block = ((features->size + 15) / 16 ) * 16;
iso_write_opts_set_ms_block(opts, ms_block);
iso_write_opts_set_appendable(opts, 1);
iso_write_opts_set_overwrite_buf(opts, buf);
free(features);
result = iso_image_create_burn_source(image, opts, &burn_src);
if (result < 0) {
printf("Cant create image, error %d\n", result);
return 1;
}
iso_write_opts_free(opts);
/* a. write the new image */
printf("Adding new data...\n");
{
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, burn_src);
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, ms_block * 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);
}
}
/* b. write the new vol desc */
printf("Writing the new vol desc...\n");
ret = burn_random_access_write(drive, 0, (char*)buf, 32*2048, 0);
if (ret != 1) {
printf("Ups, new vol desc write failed\n");
}
iso_image_unref(image);
exit_cleanup:;
burn_drive_release(drives[0].drive, 0);
burn_finish();
iso_finish();
exit(ret);
}
static int
libburn_ds_read_block(IsoDataSource *src, uint32_t lba, uint8_t *buffer)
{
struct burn_drive *d;
off_t data_count;
d = (struct burn_drive*)src->data;
if ( burn_read_data(d, (off_t) lba * (off_t) 2048, (char*)buffer,
2048, &data_count, 0) < 0 ) {
return -1; /* error */
}
return 1;
}
static
int libburn_ds_open(IsoDataSource *src)
{
/* nothing to do, device is always opened */
return 1;
}
static
int libburn_ds_close(IsoDataSource *src)
{
/* nothing to do, device is always opened */
return 1;
}
static void
libburn_ds_free_data(IsoDataSource *src)
{
/* nothing to do */
}
static IsoDataSource *
libburn_data_source_new(struct burn_drive *d)
{
IsoDataSource *ret;
ret = malloc(sizeof(IsoDataSource));
ret->version = 0;
ret->refcount = 1;
ret->read_block = libburn_ds_read_block;
ret->open = libburn_ds_open;
ret->close = libburn_ds_close;
ret->free_data = libburn_ds_free_data;
ret->data = d;
return ret;
}