New API calls burn_drive_grab_dummy(), burn_drive_get_drive_role()

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.09.01.182319"
+#define Cdrskin_timestamP "2007.09.04.224905"

libburn/async.c

@@ -96,7 +96,7 @@ static void add_worker(struct burn_drive *d, WorkerFunc f, void *data)
 	tmp = workers;
 	workers = a;
 
-	if (d)
+	if (d != NULL)
 		d->busy = BURN_DRIVE_SPAWNING;
 
 	if (pthread_create(&a->thread, NULL, f, a)) {
@@ -211,9 +211,6 @@ void burn_disc_erase(struct burn_drive *drive, int fast)
 {
 	struct erase_opts o;
 
-	/* A70103 : will be set to 0 by burn_disc_erase_sync() */
-	drive->cancel = 1;
-
 	/* ts A61006 */
 	/* a ssert(drive); */
 	/* a ssert(!SCAN_GOING()); */
@@ -233,6 +230,8 @@ void burn_disc_erase(struct burn_drive *drive, int fast)
 			0, 0);
 		return;
 	}
+	/* A70103 : will be set to 0 by burn_disc_erase_sync() */
+	drive->cancel = 1;
 
 	/* ts A70103 moved up from burn_disc_erase_sync() */
 	/* ts A60825 : allow on parole to blank appendable CDs */
@@ -247,6 +246,8 @@ void burn_disc_erase(struct burn_drive *drive, int fast)
 	    (drive->status != BURN_DISC_FULL &&
 	     drive->status != BURN_DISC_APPENDABLE &&
 	     drive->status != BURN_DISC_BLANK)
+	    ||
+	    (drive->drive_role != 1)
 	   ) {
 		libdax_msgs_submit(libdax_messenger, drive->global_index,
 			0x00020130,
@@ -287,6 +288,14 @@ void burn_disc_format(struct burn_drive *drive, off_t size, int flag)
 			0, 0);
 		return;
 	}
+	if (drive->drive_role != 1) {
+		libdax_msgs_submit(libdax_messenger, drive->global_index,
+			0x00020146,
+			LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
+			"Drive is a virtual placeholder", 0, 0);
+		drive->cancel = 1;
+		return;
+	}
 	if (flag & 128)     /* application prescribed format type */
 		flag |= 16; /* enforce re-format */
 
@@ -339,13 +348,6 @@ void burn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
 #endif
 
 
-	/* For the next lines any return indicates failure */
-	opts->drive->cancel = 1;
-
-	/* ts A70203 : people have been warned in API specs */
-	if (opts->write_type == BURN_WRITE_NONE)
-		return;
-
 	/* ts A61006 */
 	/* a ssert(!SCAN_GOING()); */
 	/* a ssert(!find_worker(opts->drive)); */
@@ -357,8 +359,24 @@ void burn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
 			0, 0);
 		return;
 	}
+
+	/* For the next lines any return indicates failure */
+	opts->drive->cancel = 1;
+
+	/* ts A70203 : people have been warned in API specs */
+	if (opts->write_type == BURN_WRITE_NONE)
+		return;
+
+	if (opts->drive->drive_role == 0) {
+		libdax_msgs_submit(libdax_messenger, opts->drive->global_index,
+			0x00020146,
+			LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
+			"Drive is a virtual placeholder (null-drive)", 0, 0);
+		return;
+	}
+
 	/* ts A61007 : obsolete Assert in spc_select_write_params() */
-	if (!opts->drive->mdata->valid) {
+	if (opts->drive->drive_role == 1 && !opts->drive->mdata->valid) {
 		libdax_msgs_submit(libdax_messenger,
 				opts->drive->global_index, 0x00020113,
 				LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,

libburn/drive.c

@@ -35,6 +35,9 @@
 /* A70225 : to learn about eventual Libburn_dvd_r_dl_multi_no_close_sessioN */
 #include "write.h"
 
+/* A70903 : for burn_scsi_setup_drive() */
+#include "spc.h"
+
 #include "libdax_msgs.h"
 extern struct libdax_msgs *libdax_messenger;
 
@@ -47,11 +50,30 @@ int burn_setup_drive(struct burn_drive *d, char *fname)
 {
 	d->devname = burn_strdup(fname);
 	memset(&d->params, 0, sizeof(struct params));
+	d->idata = NULL;
+	d->mdata = NULL;
+	d->toc_entry = NULL;
 	d->released = 1;
 	d->status = BURN_DISC_UNREADY;
 	return 1;
 }
 
+
+/* ts A70903 */
+void burn_drive_free_subs(struct burn_drive *d)
+{
+	if (d->idata != NULL)
+		free((void *) d->idata);
+	if (d->mdata != NULL) {
+		burn_mdata_free_subs(d->mdata);
+		free((void *) d->mdata);
+	}
+	if(d->toc_entry != NULL)
+		free((void *) d->toc_entry);
+	free(d->devname);
+}
+
+
 /* ts A60904 : ticket 62, contribution by elmom */
 /* splitting former burn_drive_free() (which freed all, into two calls) */
 void burn_drive_free(struct burn_drive *d)
@@ -59,14 +81,10 @@ void burn_drive_free(struct burn_drive *d)
 	if (d->global_index == -1)
 		return;
 	/* ts A60822 : close open fds before forgetting them */
-	if (burn_drive_is_open(d))
+	if (d->drive_role == 1)
-		d->release(d);
+		if (burn_drive_is_open(d))
-	free((void *) d->idata);
+			d->release(d);
-	burn_mdata_free_subs(d->mdata);
+	burn_drive_free_subs(d);
-	free((void *) d->mdata);
-	if(d->toc_entry != NULL)
-		free((void *) d->toc_entry);
-	free(d->devname);
 	d->global_index = -1;
 }
 
@@ -327,6 +345,8 @@ struct burn_drive *burn_drive_finish_enum(struct burn_drive *d)
    	<<< debug: for tracing calls which might use open drive fds */
 	int mmc_function_spy(char * text);
 
+	d->drive_role = 1; /* MMC drive */
+
 	t = burn_drive_register(d);
 
 	/* ts A60821 */
@@ -399,10 +419,13 @@ void burn_drive_release(struct burn_drive *d, int le)
 		return;
 	}
 
-	d->unlock(d);
+	if (d->drive_role == 1) {
-	if (le)
+		d->unlock(d);
-		d->eject(d);
+		if (le)
-	d->release(d);
+			d->eject(d);
+		d->release(d);
+	}
+
 	d->released = 1;
 
 	/* ts A61125 : outsourced model aspects */
@@ -485,7 +508,8 @@ void burn_disc_erase_sync(struct burn_drive *d, int fast)
 
 	/* ts A61125 : update media state records */
 	burn_drive_mark_unready(d);
-	burn_drive_inquire_media(d);
+	if (d->drive_role == 1)
+		burn_drive_inquire_media(d);
 	d->busy = BURN_DRIVE_IDLE;
 }
 
@@ -513,6 +537,7 @@ void burn_disc_format_sync(struct burn_drive *d, off_t size, int flag)
 	stages = 1 + ((flag & 1) && size > 1024 * 1024);
 	d->cancel = 0;
 	d->busy = BURN_DRIVE_FORMATTING;
+
 	ret = d->format_unit(d, size, flag & 0xff96); /* forward bits */
 	if (ret <= 0)
 		d->cancel = 1;
@@ -593,6 +618,8 @@ int burn_disc_get_formats(struct burn_drive *d, int *status, off_t *size,
 	*size = 0;
 	*bl_sas = 0;
 	*num_formats = 0;
+	if (d->drive_role != 1)
+		return 0;
 	ret = d->read_format_capacities(d, 0x00);
 	if (ret <= 0)
 		return 0;
@@ -643,7 +670,7 @@ int burn_disc_erasable(struct burn_drive *d)
 enum burn_drive_status burn_drive_get_status(struct burn_drive *d,
 					     struct burn_progress *p)
 {
-	if (p) {
+	if (p != NULL) {
 		memcpy(p, &(d->progress), sizeof(struct burn_progress));
 		/* TODO: add mutex */
 	}
@@ -797,22 +824,6 @@ int burn_drive_scan_sync(struct burn_drive_info *drives[],
 	return 0;
 }
 
-
-void burn_drive_info_free(struct burn_drive_info drive_infos[])
-{
-/* ts A60904 : ticket 62, contribution by elmom */
-/* clarifying the meaning and the identity of the victim */
-
-	/* ts A60904 : This looks a bit weird.
-	   burn_drive_info is not the manager of burn_drive but only its
-	   spokesperson. To my knowlege drive_infos from burn_drive_scan()
-	   are not memorized globally. */
-	if(drive_infos != NULL)
-		free((void *) drive_infos);
-
-	burn_drive_free_all();
-}
-
 /* ts A61001 : internal call */
 int burn_drive_forget(struct burn_drive *d, int force)
 {
@@ -846,6 +857,32 @@ int burn_drive_info_forget(struct burn_drive_info *info, int force)
   return burn_drive_forget(info->drive, force);
 }
 
+
+void burn_drive_info_free(struct burn_drive_info drive_infos[])
+{
+/* ts A60904 : ticket 62, contribution by elmom */
+/* clarifying the meaning and the identity of the victim */
+
+	/* ts A60904 : This looks a bit weird.
+	   burn_drive_info is not the manager of burn_drive but only its
+	   spokesperson. To my knowlege drive_infos from burn_drive_scan()
+	   are not memorized globally. */
+	if(drive_infos != NULL)
+		free((void *) drive_infos);
+
+	/* >>> ts A70903 : THIS IS WRONG !
+	   It contradicts the API and endangers multi drive usage.
+	   This call is not entitled to delete all drives, only the
+	   ones of the array.
+
+	   Problem:  it is unclear how many items are listed in drive_infos
+           Solution: add a dummy element to any burn_drive_info array with
+                     drive == NULL
+	*/
+	burn_drive_free_all();
+}
+
+
 struct burn_disc *burn_drive_get_disc(struct burn_drive *d)
 {
 	/* ts A61022: SIGSEGV on calling this function with blank media */
@@ -858,6 +895,9 @@ struct burn_disc *burn_drive_get_disc(struct burn_drive *d)
 
 void burn_drive_set_speed(struct burn_drive *d, int r, int w)
 {
+	d->nominal_write_speed = w;
+	if(d->drive_role != 1)
+		return;
 	d->set_speed(d, r, w);
 }
 
@@ -904,17 +944,23 @@ void burn_sectors_to_msf(int sectors, int *m, int *s, int *f)
 
 int burn_drive_get_read_speed(struct burn_drive *d)
 {
+	if(!d->mdata->valid)
+		return 0;
 	return d->mdata->max_read_speed;
 }
 
 int burn_drive_get_write_speed(struct burn_drive *d)
 {
+	if(!d->mdata->valid)
+		return 0;
 	return d->mdata->max_write_speed;
 }
 
 /* ts A61021 : New API function */
 int burn_drive_get_min_write_speed(struct burn_drive *d)
 {
+	if(!d->mdata->valid)
+		return 0;
 	return d->mdata->min_write_speed;
 }
 
@@ -1383,6 +1429,8 @@ int burn_drive_get_start_end_lba(struct burn_drive *d,
 /* ts A61020 API function */
 int burn_disc_pretend_blank(struct burn_drive *d)
 {
+	if (d->drive_role == 0)
+		return 0;
 	if (d->status != BURN_DISC_UNREADY && 
 	    d->status != BURN_DISC_UNSUITABLE)
 		return 0;
@@ -1393,6 +1441,8 @@ int burn_disc_pretend_blank(struct burn_drive *d)
 /* ts A61106 API function */
 int burn_disc_pretend_full(struct burn_drive *d)
 {
+	if (d->drive_role == 0)
+		return 0;
 	if (d->status != BURN_DISC_UNREADY && 
 	    d->status != BURN_DISC_UNSUITABLE)
 		return 0;
@@ -1411,6 +1461,8 @@ int burn_disc_read_atip(struct burn_drive *d)
 				0, 0);
 		return -1;
 	}
+	if(d->drive_role != 1)
+		return 0;
 	if (d->current_profile == -1 || d->current_is_cd_profile) {
 		d->read_atip(d);
 		/* >>> some control of success would be nice :) */
@@ -1443,6 +1495,9 @@ int burn_disc_track_lba_nwa(struct burn_drive *d, struct burn_write_opts *o,
 			0, 0);
 		return -1;
 	}
+	*lba = *nwa = 0;
+	if (d->drive_role != 1)
+		return 0;
 	if (o != NULL)
 		d->send_write_parameters(d, o);
 	ret = d->get_nwa(d, trackno, lba, nwa);
@@ -1471,6 +1526,9 @@ int burn_disc_get_msc1(struct burn_drive *d, int *start)
 			0, 0);
 		return -1;
 	}
+	*start = 0;
+	if (d->drive_role != 1)
+		return 0;
 	ret = d->read_multi_session_c1(d, &trackno, start);
 	return ret;
 }
@@ -1483,13 +1541,20 @@ off_t burn_disc_available_space(struct burn_drive *d,
 	int lba, nwa;
 
 	if (burn_drive_is_released(d))
-		goto ex;
+		return 0;
 	if (d->busy != BURN_DRIVE_IDLE)
-		goto ex;
+		return 0;
+	if (d->drive_role == 0)
+		return 0;
+	if (d->drive_role == 2) {
+
+		/* >>> how to estimate available space for a stdio file ? */
+		return ((off_t) (1024 * 1024 * 1024) * (off_t) 2048);
+
+	}
 	if (o != NULL)
 		d->send_write_parameters(d, o);
 	d->get_nwa(d, -1, &lba, &nwa);
-ex:;
 	if (o != NULL) {
 		if (o->start_byte > 0) {
 			if (o->start_byte > d->media_capacity_remaining)
@@ -1594,6 +1659,8 @@ int burn_speed_descriptor_copy(struct burn_speed_descriptor *from,
 /* ts A61226 : free dynamically allocated sub data of struct scsi_mode_data */
 int burn_mdata_free_subs(struct scsi_mode_data *m)
 {
+	if(!m->valid)
+		return 0;
 	burn_speed_descriptor_destroy(&(m->speed_descriptors), 1);
 	return 1;
 }
@@ -1607,6 +1674,8 @@ int burn_drive_get_speedlist(struct burn_drive *d,
 	struct burn_speed_descriptor *sd, *csd = NULL;
 
 	(*speed_list) = NULL;
+	if(!d->mdata->valid)
+		return 0;
 	for (sd = d->mdata->speed_descriptors; sd != NULL; sd = sd->next) {
 		ret = burn_speed_descriptor_new(&csd, NULL, csd, 0);
 		if (ret <= 0)
@@ -1630,6 +1699,8 @@ int burn_drive_get_best_speed(struct burn_drive *d, int speed_goal,
 	if (speed_goal < 0)
 		best_speed = 2000000000;
 	*best_descr = NULL;
+	if(!d->mdata->valid)
+		return 0;
 	for (sd = d->mdata->speed_descriptors; sd != NULL; sd = sd->next) {
 		if (flag & 1)
 			speed = sd->read_speed;
@@ -1703,7 +1774,21 @@ int burn_disc_get_multi_caps(struct burn_drive *d, enum burn_write_types wt,
 	o->current_is_cd_profile = d->current_is_cd_profile;
         o->might_simulate = 0;
 	
-	if (s != BURN_DISC_BLANK && s != BURN_DISC_APPENDABLE) {
+	if (d->drive_role == 0)
+		return 0;
+	if (d->drive_role == 2) {
+		/* stdio file dummy drive */
+		o->start_adr = 1;
+
+		size = ((off_t) (1024 * 1024 * 1024) * (off_t) 2048);
+		/* >>> obtain realistic file size */
+		o->start_range_high = size;
+
+		o->start_alignment = 2048; /* imposting a drive, not a file */
+		o->might_do_sao = 4;
+		o->might_do_tao = 2;
+		o->advised_write_mode = BURN_WRITE_TAO;
+	} else if (s != BURN_DISC_BLANK && s != BURN_DISC_APPENDABLE) {
 		return 0;
 	} else if (s == BURN_DISC_APPENDABLE &&
 		 (wt == BURN_WRITE_SAO || wt == BURN_WRITE_RAW)) {
@@ -1880,3 +1965,80 @@ int burn_disc_get_write_mode_demands(struct burn_disc *disc,
 	}
 	return (disc->sessions > 0);
 }
+
+
+/* ts A70903 : API */
+int burn_drive_grab_dummy(struct burn_drive_info *drive_infos[], char *fname)
+{
+	int ret;
+	struct burn_drive *d= NULL, *regd_d;
+	struct stat stbuf;
+
+	if (fname[0] != 0) {
+		if (stat(fname, &stbuf) == -1) {
+
+			/* >>> ? reject ? try to create ? */;
+
+		} else if(S_ISREG(stbuf.st_mode) || S_ISBLK(stbuf.st_mode)) {
+			/* >>> ? open for a test ? */; 
+		} else {
+			libdax_msgs_submit(libdax_messenger, d->global_index,
+				0x00020149,
+				LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+				"Unsuitable filetype for pseudo-drive", 0, 0);
+			return 0;
+		}
+	}
+	d= (struct burn_drive *) calloc(1, sizeof(struct burn_drive));
+	if (d == NULL)
+		return 0;
+	d->status = BURN_DISC_EMPTY;
+	burn_setup_drive(d, fname);
+
+	if (fname[0] != 0)
+		d->drive_role = 2;
+	else
+		d->drive_role = 0;
+	ret = burn_scsi_setup_drive(d, -1, -1, -1, -1, -1, 0);
+	if (ret <= 0)
+		goto ex;
+	regd_d = burn_drive_register(d);
+	if (regd_d == NULL) {
+		ret = -1;
+		goto ex;
+	}
+	if (d->drive_role == 2) {
+		d->status = BURN_DISC_BLANK;
+		d->current_profile = 0; /* MMC reserved */
+		strcpy(d->current_profile_text,"stdio file");
+		d->current_is_cd_profile = 0;
+		d->current_is_supported_profile = 1;
+		d->block_types[BURN_WRITE_TAO] = BURN_BLOCK_MODE1;
+		d->block_types[BURN_WRITE_SAO] = BURN_BLOCK_MODE1;
+	}
+
+	*drive_infos = calloc(2, sizeof(struct burn_drive_info));
+	if (*drive_infos == NULL)
+		goto ex;
+	(*drive_infos)[0].drive = d;
+	(*drive_infos)[1].drive = NULL; /* End-Of-List mark */
+	(*drive_infos)[0].tao_block_types = d->block_types[BURN_WRITE_TAO];
+	(*drive_infos)[0].sao_block_types = d->block_types[BURN_WRITE_SAO];
+	
+	d->released = 0;
+	ret = 1;
+ex:;
+	if (ret <= 0 && d != NULL) {
+		burn_drive_free_subs(d);
+		free((char *) d);
+	}
+	return ret;
+}
+
+
+/* ts A70903 : API */
+int burn_drive_get_drive_role(struct burn_drive *d)
+{
+	return d->drive_role;
+}
+

libburn/libburn.h

@@ -1302,7 +1302,7 @@ struct burn_source *burn_fd_source_new(int datafd, int subfd, off_t size);
 /* ts A70328 */
 /** Sets a fixed track size after the data source object has already been
     created.
-    @param t The track to poperate on
+    @param t The track to operate on
     @param size the number of bytes to use as track size
     @return <=0 indicates failure , >0 success
 */
@@ -1901,6 +1901,40 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
                    char data[], off_t data_size, off_t *data_count, int flag);
 
 
+/* ts A70903 */
+/** Create and aquire a pseudo-drive which will accept option settings much
+    like a MMC burner drive. Many of them will not cause any effect, though.
+    There are two kinds of pseudo-drives: stdio-drives and null-drives. 
+    A stdio-drive performs all its eventual data transfer activities on a file
+    via standard i/o functions open(2), lseek(2), read(2), write(2), close(2).
+    Its capabilities resemble DVD-RAM but the media profile reported is 0x00
+    and it issues no realistic write space information.
+    A null-drive is created if the parameter "name" is an empty string. It will
+    pretend to have loaded no media.
+    @param drive_infos On success returns a one element array with the drive
+                  (cdrom/burner). Thus use with driveno 0 only. On failure
+                  the array has no valid elements at all.
+                  The returned array should be freed via burn_drive_info_free()
+                  when it is no longer needed.
+    @param name   Sets the file address to be used for writing. Permissible
+                  file types are regular file or block device. If the file
+                  does not exist, it is attempted to create it as regular file.
+                  An empty fname creates a null-drive.
+    @return       1 success , <=0 failure
+*/
+int burn_drive_grab_dummy(struct burn_drive_info *drive_infos[], char *fname);
+
+
+/** Inquire wether the drive object is a real MMC drive or a pseudo-drive
+    created by burn_drive_dummy().
+    @param d      The drive to inquire
+    @return       0= null-drive
+                  1= real MMC drive
+                  2= stdio-drive
+*/
+int burn_drive_get_drive_role(struct burn_drive *d);
+
+
 #ifndef DOXYGEN
 
 BURN_END_DECLS

libburn/libdax_msgs.h

@@ -377,6 +377,11 @@ Range "scdbackup"          :  0x00020000 to 0x0002ffff
  0x00020143 (SORRY,HIGH)   = Read start address not properly aligned
  0x00020144 (SORRY,HIGH)   = SCSI error on read
  0x00020145 (FATAL,HIGH)   = Drive is busy on attempt to read data
+ 0x00020146 (FATAL,HIGH)   = Drive is a virtual placeholder
+ 0x00020147 (SORRY,HIGH)   = Cannot address start byte
+ 0x00020148 (SORRY,HIGH)   = Cannot write desired amount of data
+ 0x00020149 (SORRY,HIGH)   = Unsuitable filetype for pseudo-drive
+ 0x0002014a (SORRY,HIGH)   = Cannot read desired amount of data
 
 
  libdax_audioxtr:

libburn/options.c

@@ -142,6 +142,8 @@ int burn_write_opts_set_simulate(struct burn_write_opts *opts, int sim)
 int burn_write_opts_set_underrun_proof(struct burn_write_opts *opts,
 				       int underrun_proof)
 {
+	if (!opts->drive->mdata->valid)
+		return 0;
 	if (opts->drive->mdata->underrun_proof) {
 		opts->underrun_proof = underrun_proof;
 		return 1;

libburn/read.c

@@ -12,6 +12,9 @@
 #include <stdio.h>
 #include <string.h>
 #include <ctype.h>
+#include <fcntl.h>
+#include <errno.h>
+
 #include "sector.h"
 #include "libburn.h"
 #include "drive.h"
@@ -288,12 +291,37 @@ static void flipq(unsigned char *sub)
 */
 
 
+/* ts A70904 */
+/** @param flag bit=be silent on data shortage */
+int burn_stdio_read(int fd, char *buf, int bufsize, struct burn_drive *d,
+			int flag)
+{
+	int todo, count = 0;
+
+	for(todo = bufsize; todo > 0; ) {
+		count = read(fd, buf + (bufsize - todo), todo);
+		if(count <= 0)
+	break;
+		todo -= count;
+	}
+	if(todo > 0 && !(flag & 1)) {
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x0002014a,
+			LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+			"Cannot read desired amount of data", errno, 0);
+	}
+	if (count < 0)
+		return -1;
+	return (bufsize - todo);
+}
+
+
 /* ts A70812 : API function */
 int burn_read_data(struct burn_drive *d, off_t byte_address,
                    char data[], off_t data_size, off_t *data_count, int flag)
 {
 	int alignment = 2048, start, upto, chunksize = 1, err, cpy_size, i;
-	int sose_mem = 0;
+	int sose_mem = 0, fd = -1, ret;
 	char msg[81], *wpt;
 	struct buffer buf;
 
@@ -307,6 +335,13 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
 			"Drive is not grabbed on random access write", 0, 0);
 		return 0;
 	}
+	if (d->drive_role == 0) {
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x00020146,
+			LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
+			"Drive is a virtual placeholder (null-drive)", 0, 0);
+		return 0;
+	}
 	if ((byte_address % alignment) != 0) {
 		sprintf(msg,
 			"Read start address not properly aligned (%d bytes)",
@@ -325,6 +360,33 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
 			"Drive is busy on attempt to read data", 0, 0);
 		return 0;
 	}
+
+	if (d->drive_role != 1) {
+
+/* <<< We need _LARGEFILE64_SOURCE defined by the build system.
+*/
+#ifndef O_LARGEFILE
+#define O_LARGEFILE 0
+#endif
+
+		fd = open(d->devname, O_RDONLY | O_LARGEFILE);
+		if (fd == -1) {
+			libdax_msgs_submit(libdax_messenger, d->global_index,
+				0x00020005,
+				LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+				"Failed to open device (a pseudo-drive)",
+				 errno, 0);
+			ret = 0; goto ex;
+		}
+		if (lseek(fd, byte_address, SEEK_SET) == -1) {
+			libdax_msgs_submit(libdax_messenger, d->global_index,
+				0x00020147,
+				LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+				"Cannot address start byte", errno, 0);
+			ret = 0; goto ex;
+		}
+	}
+
 	d->busy = BURN_DRIVE_READING_SYNC;
 	d->buffer = &buf;
 
@@ -342,7 +404,14 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
 			cpy_size = data_size - *data_count;
 		if (flag & 2)
 			d->silent_on_scsi_error = 1;
-		err = d->read_10(d, start, chunksize, d->buffer);
+		if (d->drive_role == 1) {
+			err = d->read_10(d, start, chunksize, d->buffer);
+		} else {
+			ret = burn_stdio_read(fd, (char *) d->buffer->data,
+						 cpy_size, d, 0);
+			if (ret <= 0)
+				err = BE_CANCELLED;
+		}
 		if (flag & 2) 
 			d->silent_on_scsi_error = sose_mem;
 		if (err == BE_CANCELLED) {
@@ -350,7 +419,16 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
 			for (i = 0; i < chunksize - 1; i++) {
 				if (flag & 2)
 					d->silent_on_scsi_error = 1;
-				err = d->read_10(d, start + i, 1, d->buffer);
+				if (d->drive_role == 1) {
+					err = d->read_10(d, start + i, 1,
+							 d->buffer);
+				} else {
+					ret = burn_stdio_read(fd,
+						(char *) d->buffer->data,
+						2048, d, 1);
+					if (ret <= 0)
+						err = BE_CANCELLED;
+				}
 				if (flag & 2) 
 					d->silent_on_scsi_error = sose_mem;
 				if (err == BE_CANCELLED)
@@ -359,16 +437,18 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
 				wpt += 2048;
 				*data_count += 2048;
 			}
-			d->buffer = NULL;
+			ret = 0; goto ex;
-			d->busy = BURN_DRIVE_IDLE;
-			return 0;
 		}
 		memcpy(wpt, d->buffer->data, cpy_size);
 		wpt += cpy_size;
 		*data_count += cpy_size;
 	}
 
+	ret = 1;
+ex:;
+	if (fd != -1)
+		close(fd);
 	d->buffer = NULL;
 	d->busy = BURN_DRIVE_IDLE;
-	return 1;
+	return ret;
 }

libburn/spc.c

@@ -739,11 +739,8 @@ int burn_scsi_setup_drive(struct burn_drive *d, int bus_no, int host_no,
 	d->silent_on_scsi_error = 0;
 
 
-	d->idata = malloc(sizeof(struct burn_scsi_inquiry_data));
+	d->idata = calloc(1, sizeof(struct burn_scsi_inquiry_data));
-	d->idata->valid = 0;
+	d->mdata = calloc(1, sizeof(struct scsi_mode_data));
-	d->mdata = malloc(sizeof(struct scsi_mode_data));
-	d->mdata->valid = 0;
-	d->mdata->speed_descriptors = NULL;
 
 	/* ts A61007 : obsolete Assert in drive_getcaps() */
 	if(d->idata == NULL || d->mdata == NULL) {
@@ -752,6 +749,9 @@ int burn_scsi_setup_drive(struct burn_drive *d, int bus_no, int host_no,
 	                "Could not allocate new drive object", 0, 0);
 		return -1;
 	}
+	d->idata->valid = 0;
+	d->mdata->valid = 0;
+	d->mdata->speed_descriptors = NULL;
 	if(!(flag & 1)) {
 		ret = spc_setup_drive(d);
 		if (ret<=0)

libburn/transport.h

@@ -121,6 +121,9 @@ struct burn_format_descr {
 /** Gets initialized in enumerate_common() and burn_drive_register() */
 struct burn_drive
 {
+	/* ts A70902: 0=null-emulation , 1=MMC drive , 2=stdio-emulation */
+	int drive_role;
+
 	int bus_no;
 	int host;
 	int id;

libburn/write.c

@@ -18,11 +18,15 @@
 #define Libburn_sao_can_appenD 1
 */
 
-
+#include <sys/types.h>
 #include <stdio.h>
 #include <string.h>
 #include <ctype.h>
 #include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+
 #include "error.h"
 #include "sector.h"
 #include "libburn.h"
@@ -910,6 +914,13 @@ int burn_precheck_write(struct burn_write_opts *o, struct burn_disc *disc,
 	reason_pt= reasons;
 	reasons[0] = 0;
 
+	if (d->drive_role == 0) {
+		sprintf(reasons,
+			 "DRIVE: is a virtual placeholder (null-drive)");
+		no_media = 1;
+		goto ex;
+	}
+
 	/* check write mode against write job */
 	wt = burn_write_opts_auto_write_type(o, disc, reasons, 1);
 	if (wt == BURN_WRITE_NONE) {
@@ -922,16 +933,18 @@ int burn_precheck_write(struct burn_write_opts *o, struct burn_disc *disc,
 	reason_pt= reasons + strlen(reasons);
 	if (d->status == BURN_DISC_UNSUITABLE)
 		goto unsuitable_profile;
-	if (d->current_profile == 0x09 || d->current_profile == 0x0a) {
+	if (d->drive_role == 2 ||
+		d->current_profile == 0x1a || d->current_profile == 0x12) { 
+		/* DVD+RW , DVD-RAM , emulated drive on stdio file */
+		if (o->start_byte >= 0 && (o->start_byte % 2048))
+			strcat(reasons,
+			 "write start address not properly aligned to 2048, ");
+	} else if (d->current_profile == 0x09 || d->current_profile == 0x0a) {
+		/* CD-R , CD-RW */
 		if (!burn_disc_write_is_ok(o, disc, (!!silent) << 1))
 			strcat(reasons, "unsuitable track mode found, ");
 		if (o->start_byte >= 0)
 			strcat(reasons, "write start address not supported, ");
-	} else if (d->current_profile == 0x1a || d->current_profile == 0x12) { 
-		/* DVD+RW , DVD-RAM */
-		if (o->start_byte >= 0 && (o->start_byte % 2048))
-			strcat(reasons,
-			 "write start address not properly aligned to 2048, ");
 	} else if (d->current_profile == 0x13) {
 		/* DVD-RW Restricted Overwrite */
 		if (o->start_byte >= 0 && (o->start_byte % 32768))
@@ -1431,8 +1444,6 @@ int burn_disc_setup_dvd_minus_rw(struct burn_write_opts *o,
 
 	/* >>> perform OPC if needed */;
 
-	/* >>> */;
-
 	return 1;
 }
 
@@ -1743,6 +1754,177 @@ early_failure:;
 }
 
 
+/* ts A70904 */
+int burn_stdio_open_write(struct burn_drive *d, off_t start_byte, int flag)
+{
+	int fd = -1;
+	int mode = O_RDWR | O_CREAT;
+	char msg[160];
+
+/* <<< We need _LARGEFILE64_SOURCE defined by the build system.
+*/
+#ifndef O_LARGEFILE
+#define O_LARGEFILE 0
+#endif
+
+	if (d->devname[0] == 0) /* null drives should not come here */
+		return -1;
+	fd = open(d->devname, mode, S_IRUSR | S_IWUSR);
+	if (fd == -1) {
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x00020005,
+			LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+			"Failed to open device (a pseudo-drive)", errno, 0);
+	} 
+	if (start_byte < 0)
+		start_byte = 0;
+	if (lseek(fd, start_byte, SEEK_SET)==-1) {
+		sprintf(msg, "Cannot address start byte %.f",
+			 (double) start_byte);
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x00020147,
+			LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+			msg, errno, 0);
+		close(fd);
+		fd = -1;
+	}
+	d->nwa = start_byte / 2048;
+	return fd;
+}
+
+
+/* ts A70904 */
+int burn_stdio_read_source(struct burn_source *source, char *buf, int bufsize,
+			 	struct burn_write_opts *o, int flag)
+{
+	int count= 0, todo;
+
+	for(todo = bufsize; todo > 0; todo -= count) {
+		count = source->read(source,
+			    (unsigned char *) (buf + (bufsize - todo)), todo);
+		if (count <= 0)
+	break;
+	}
+	return (bufsize - todo);
+}
+
+
+/* ts A70904 */
+int burn_stdio_write(int fd, char *buf, int count, struct burn_drive *d, 
+			 int flag)
+{
+	if (write(fd, buf, count) != count) {
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x00020148,
+			LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+			"Cannot write desired amount of data", errno, 0);
+		return 0;
+	}
+	return count;
+}
+
+
+/* ts A70904 */
+int burn_stdio_write_track(struct burn_write_opts *o, struct burn_session *s,
+				int tnum, int fd, int flag)
+{
+	int open_ended, bufsize, ret, eof_seen = 0, sectors;
+	struct burn_track *t = s->track[tnum];
+	struct burn_drive *d = o->drive;
+	off_t t_size, w_count;
+	char buf[16*2048];
+
+	bufsize = sizeof(buf);
+
+	sectors = burn_track_get_sectors(t);
+	burn_disc_init_track_status(o, s, tnum, sectors);
+
+	/* >>> write t->offset zeros */;
+
+	open_ended = burn_track_is_open_ended(t);
+	t_size = t->source->get_size(t->source);
+	for(w_count = 0; w_count < t_size || open_ended; w_count += ret) {
+
+
+		if (t_size - w_count < bufsize && ! open_ended)
+
+			/* >>> what about final sector padding ? */
+
+			bufsize = t_size - w_count;
+		if (eof_seen)
+			ret = 0;
+		else
+			ret = burn_stdio_read_source(t->source, buf,
+							 bufsize, o, 0);
+		if (ret < 0)
+			return ret;
+		if (ret == 0 && open_ended)
+	break;
+		if (ret < bufsize && !open_ended) {
+			memset(buf + ret, 0, bufsize - ret);
+			eof_seen = 1;
+			ret = bufsize;
+		}
+		ret = burn_stdio_write(fd, buf, ret, d, 0);
+		if (ret <= 0)
+			return ret;
+
+		d->progress.sector = (w_count + (off_t) ret) / (off_t) 2048;
+		if (open_ended)
+			d->progress.sectors = d->progress.sector;
+	}
+
+	/* >>> write t->tail zeros */;
+
+	return 1;
+}
+
+
+/* ts A70904 */
+int burn_stdio_write_sync(struct burn_write_opts *o,
+				 struct burn_disc *disc)
+{
+	int ret, fd = -1;
+	struct burn_drive *d = o->drive;
+
+	d->needs_close_session = 0;
+	o->obs_pad = 0; /* no filling-up of track's last 32k buffer */
+	o->obs = 32*1024; /* buffer size */
+
+	if (disc->sessions != 1)
+		{ret= 0 ; goto ex;}
+	if (disc->session[0]->tracks != 1)
+		{ret= 0 ; goto ex;}
+	
+	/* update progress */
+	d->progress.session = 0;
+	d->progress.tracks = 1;
+
+	/* open target file */
+	fd = burn_stdio_open_write(d, o->start_byte, 0);
+	if (fd == -1)
+		{ret = 0; goto ex;}
+
+	ret = burn_stdio_write_track(o, disc->session[0], 0, fd, 0);
+	if (ret <= 0)
+		goto ex;
+
+	/* XXX: currently signs an end of session */
+	d->progress.sector = 0;
+	d->progress.start_sector = 0;
+	d->progress.sectors = 0;
+	ret = 1;
+ex:;
+	if (fd != -1)
+		close (fd);
+	/* update media state records */
+	burn_drive_mark_unready(d);
+
+	d->busy = BURN_DRIVE_IDLE;
+	return ret;
+}
+
+
 void burn_disc_write_sync(struct burn_write_opts *o, struct burn_disc *disc)
 {
 	struct cue_sheet *sheet;
@@ -1765,6 +1947,13 @@ void burn_disc_write_sync(struct burn_write_opts *o, struct burn_disc *disc)
 	d->rlba = -150;
 	d->toc_temp = 9;
 
+	/* ts A70904 */
+	if (d->drive_role != 1) {
+		ret = burn_stdio_write_sync(o, disc);
+		if (ret <= 0)
+			goto fail_wo_sync;
+		return;
+	}
 	/* ts A61218 */
 	if (! d->current_is_cd_profile) {
 		ret = burn_dvd_write_sync(o, disc);
@@ -1974,7 +2163,7 @@ fail_wo_sync:;
 int burn_random_access_write(struct burn_drive *d, off_t byte_address,
 				char *data, off_t data_count, int flag)
 {
-	int alignment = 0, start, upto, chunksize, err;
+	int alignment = 0, start, upto, chunksize, err, fd = -1, ret;
 	char msg[81], *rpt;
 	struct buffer buf;
 
@@ -1985,6 +2174,16 @@ int burn_random_access_write(struct burn_drive *d, off_t byte_address,
 			"Drive is not grabbed on random access write", 0, 0);
 		return 0;
 	}
+	if(d->drive_role == 0) {
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x00020146,
+			LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
+			"Drive is a virtual placeholder (null-drive)", 0, 0);
+		return 0;
+	}
+
+	if(d->drive_role != 1)
+		alignment = 2 * 1024;
 	if (d->current_profile == 0x12) /* DVD-RAM */
 		alignment = 2 * 1024;
         if (d->current_profile == 0x13) /* DVD-RW restricted overwrite */
@@ -2019,7 +2218,6 @@ int burn_random_access_write(struct burn_drive *d, off_t byte_address,
 			msg, 0, 0);
 		return 0;
 	}
-
 	if (d->busy != BURN_DRIVE_IDLE) {
 		libdax_msgs_submit(libdax_messenger,
 			d->global_index, 0x00020140,
@@ -2027,6 +2225,11 @@ int burn_random_access_write(struct burn_drive *d, off_t byte_address,
 			"Drive is busy on attempt to write random access",0,0);
 		return 0;
 	}
+	if(d->drive_role != 1) {
+		fd = burn_stdio_open_write(d, byte_address, 0);
+		if (fd == -1)
+			return 0;
+	}
 	d->busy = BURN_DRIVE_WRITING_SYNC;
 	d->buffer = &buf;
 
@@ -2042,15 +2245,26 @@ int burn_random_access_write(struct burn_drive *d, off_t byte_address,
 		rpt += d->buffer->bytes;
 		d->buffer->sectors = chunksize;
 		d->nwa = start;
-		err = d->write(d, d->nwa, d->buffer);
+		if(d->drive_role == 1) {
+			err = d->write(d, d->nwa, d->buffer);
+		} else {
+			ret = burn_stdio_write(fd, (char *) d->buffer->data,
+						d->buffer->bytes, d, 0);
+			if (ret <= 0)
+				err = BE_CANCELLED;
+		}
 		if (err == BE_CANCELLED) {
 			d->busy = BURN_DRIVE_IDLE;
+			if(fd != -1)
+				close(fd);
 			return (-(start * 2048 - byte_address));
 		}
 	}
 
-	if (flag & 1)
+	if(d->drive_role == 1 && (flag & 1))
 		d->sync_cache(d);
+	if(fd != -1)
+		close(fd);
 	d->buffer = NULL;
 	d->busy = BURN_DRIVE_IDLE;
 	return 1;