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Support for image growing.

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This commit is contained in:
Vreixo Formoso 2008-01-05 02:03:22 +01:00
parent e471333b0b
commit 7af02cddd9
4 changed files with 326 additions and 9 deletions
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1
.bzrignore
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@ -34,3 +34,4 @@ demo/isoread
demo/isocat
demo/isomodify
demo/isoms
demo/isogrow

7
Makefile.am
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@ -61,7 +61,8 @@ noinst_PROGRAMS = \
demo/isoread \
demo/isocat \
demo/isomodify \
demo/isoms
demo/isoms \
demo/isogrow
demo_lsl_CPPFLAGS = -Isrc
demo_lsl_LDADD = $(src_libisofs_la_OBJECTS) $(THREAD_LIBS)
@ -103,6 +104,10 @@ demo_isoms_CPPFLAGS = -Isrc
demo_isoms_LDADD = $(src_libisofs_la_OBJECTS) $(THREAD_LIBS)
demo_isoms_SOURCES = demo/iso_ms.c
demo_isogrow_CPPFLAGS = -Isrc -Ilibburn
demo_isogrow_LDADD = $(src_libisofs_la_OBJECTS) $(THREAD_LIBS) -lburn
demo_isogrow_SOURCES = demo/iso_grow.c
## Build unit test

259
demo/iso_grow.c Normal file
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@ -0,0 +1,259 @@
/*
* 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];
int ret = 0;
struct iso_read_image_features features;
Ecma119WriteOpts opts = {
1, /* level */
1, /* rockridge */
0, /* omit_version_numbers */
0, /* allow_deep_paths */
1, /* sort files */
0, /* replace_dir_mode */
0, /* replace_file_mode */
0, /* replace_uid */
0, /* replace_gid */
0, /* dir_mode */
0, /* file_mode */
0, /* uid */
0, /* gid */
NULL, /* output charset */
0, /* appendable */
0, /* ms_block */
NULL /* overwrite */
};
struct iso_read_opts ropts = {
0, /* block */
0, /* norock */
0, /* nojoliet */
0, /* preferjoliet */
0, /* uid; */
0, /* gid; */
0, /* mode */
"UTF-8" /* input_charset */
};
if (argc < 3) {
usage(argv);
return 1;
}
/* create the image context */
result = iso_image_new("volume_id", &image);
if (result < 0) {
printf ("Error creating image\n");
return 1;
}
iso_image_set_msgs_severities(image, "NEVER", "ALL", "");
iso_tree_set_follow_symlinks(image, 0);
iso_tree_set_ignore_hidden(image, 0);
iso_tree_set_stop_on_error(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;
{
/* 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;
}
}
/* 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 */
ropts.block = 0; /* image always start on first block */
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;
}
/* 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 */
/* round up to 32kb aligment = 16 block*/
opts.ms_block = ((features.size + 15) / 16 ) * 16;
opts.appendable = 1;
opts.overwrite = buf;
result = iso_image_create_burn_source(image, &opts, &burn_src);
if (result < 0) {
printf ("Cant create image, error %d\n", result);
return 1;
}
/* 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, opts.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*)opts.overwrite, 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();
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->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;
}

68
src/ecma119.c
View File

@ -717,7 +717,7 @@ void *write_function(void *arg)
static
int ecma119_image_new(IsoImage *src, Ecma119WriteOpts *opts, Ecma119Image **img)
{
int ret, i;
int ret, i, voldesc_size;
Ecma119Image *target;
/* 1. Allocate target and copy opts there */
@ -801,6 +801,8 @@ int ecma119_image_new(IsoImage *src, Ecma119WriteOpts *opts, Ecma119Image **img)
goto target_cleanup;
}
voldesc_size = target->curblock - target->ms_block - 16;
/* Volume Descriptor Set Terminator */
target->curblock++;
@ -824,6 +826,61 @@ int ecma119_image_new(IsoImage *src, Ecma119WriteOpts *opts, Ecma119Image **img)
}
}
/* create the ring buffer */
ret = iso_ring_buffer_new(&target->buffer);
if (ret < 0) {
goto target_cleanup;
}
/* check if we need to provide a copy of volume descriptors */
if (opts->overwrite) {
/*
* Get a copy of the volume descriptors to be written in a DVD+RW
* disc
*/
uint8_t *buf;
struct ecma119_vol_desc_terminator *vol;
IsoImageWriter *writer;
/*
* In the PVM to be written in the 16th sector of the disc, we
* need to specify the full size.
*/
target->vol_space_size = target->curblock;
/* write volume descriptor */
for (i = 0; i < target->nwriters; ++i) {
writer = target->writers[i];
ret = writer->write_vol_desc(writer);
if (ret < 0) {
iso_msg_debug(target->image->messenger,
"Error writing overwrite volume descriptors");
goto target_cleanup;
}
}
/* skip the first 16 blocks (system area) */
buf = opts->overwrite + 16 * BLOCK_SIZE;
voldesc_size *= BLOCK_SIZE;
/* copy the volume descriptors to the overwrite buffer... */
ret = iso_ring_buffer_read(target->buffer, buf, voldesc_size);
if (ret < 0) {
iso_msg_debug(target->image->messenger,
"Error reading overwrite volume descriptors");
goto target_cleanup;
}
/* ...including the vol desc terminator */
memset(buf + voldesc_size, 0, BLOCK_SIZE);
vol = (struct ecma119_vol_desc_terminator*) (buf + voldesc_size);
vol->vol_desc_type[0] = 255;
memcpy(vol->std_identifier, "CD001", 5);
vol->vol_desc_version[0] = 1;
}
/*
* The volume space size is just the size of the last session, in
* case of ms images.
@ -833,12 +890,6 @@ int ecma119_image_new(IsoImage *src, Ecma119WriteOpts *opts, Ecma119Image **img)
/* 4. Create and start writting thread */
/* create the ring buffer */
ret = iso_ring_buffer_new(&target->buffer);
if (ret < 0) {
goto target_cleanup;
}
/* ensure the thread is created joinable */
pthread_attr_init(&(target->th_attr));
pthread_attr_setdetachstate(&(target->th_attr), PTHREAD_CREATE_JOINABLE);
@ -969,7 +1020,8 @@ int iso_write(Ecma119Image *target, void *buf, size_t count)
return ISO_WRITE_ERROR;
}
if (ret > 0){
/* total size is 0 when writing the overwrite buffer */
if (ret > 0 && (target->total_size != (off_t) 0)){
unsigned int kbw, kbt;
int percent;