Called statvfs() for size estimation of regular stdio-files.

cdrskin/cdrskin.1

@@ -270,9 +270,10 @@ Warning: Superusers must take care not to spoil their hard disk via its raw
 block device (like /dev/hda or /dev/sd0).
 .br
 Pseudo-drives behave much like DVD-RAM. They allow -dummy, nevertheless, and
-their reply with --tell_media_space is utopic. If the given address does
+their reply with --tell_media_space can be utopic. If the given address does
-not exist yet, then it gets created as regular file.
+not exist yet but its directory exists, then it gets created as regular file
-Note: -dummy runs touch the file.
+as soon as a write operation occurs.
+Note: -dummy burn runs touch the file.
 .br
 .SH OPTIONS
 .TP
@@ -397,7 +398,7 @@ Try to perform the drive operations without actually affecting the inserted
 media. There is no warranty that this will work with a particular combination
 of drive, media, and write mode. Blanking is prevented reliably, though.
 To avoid inadverted real burning, -dummy refuses burn runs on anything but
-CD-R[W] and DVD-R[W].
+CD-R[W], DVD-R[W], or emulated stdio-drives.
 .TP
 .BI \-eject
 Eject the disc after work is done.

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.09.08.174757"
+#define Cdrskin_timestamP "2007.09.09.093535"

libburn/drive.c

@@ -16,6 +16,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <pthread.h>
+#include <sys/statvfs.h>
 #include "libburn.h"
 #include "drive.h"
 #include "transport.h"
@@ -1091,16 +1092,41 @@ int burn_drive_is_banned(char *device_address)
 int burn_drive_grab_dummy(struct burn_drive_info *drive_infos[], char *fname)
 {
 	int ret;
+	off_t size = ((off_t) (1024 * 1024 * 1024) * (off_t) 2048);
+	off_t add_size = 0;
 	struct burn_drive *d= NULL, *regd_d;
 	struct stat stbuf;
+	struct statvfs vfsbuf;
+	char testpath[4096];
+
+	testpath[0] = 0;
 
 	if (fname[0] != 0) {
 		if (stat(fname, &stbuf) == -1) {
+			strcpy(testpath,fname);
+			if(strrchr(testpath,'/') == NULL)
+				strcpy(testpath,".");
+			else if(strrchr(testpath,'/') == testpath)
+				testpath[1] = 0;	
+			else
+				*strrchr(testpath,'/') = 0;	
+			if (stat(testpath, &stbuf) == -1) {
+				libdax_msgs_submit(libdax_messenger, -1,
+				 0x00020009,
+				 LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+				 "Neither stdio-path nor its directory exist",
+				 0, 0);
+			return 0;
+			}
 
-			/* >>> ? reject ? try to create ? */;
+		} else if(S_ISBLK(stbuf.st_mode)) {
 
-		} else if(S_ISREG(stbuf.st_mode) || S_ISBLK(stbuf.st_mode)) {
+			/* >>> ? how to obtain the number of blocks ? */
-			/* >>> ? open for a test ? */; 
+
+		} else if(S_ISREG(stbuf.st_mode)) {
+			add_size = stbuf.st_blocks * (off_t) 512;
+			size -= add_size;
+			strcpy(testpath,fname);
 		} else {
 			libdax_msgs_submit(libdax_messenger, -1,
 				0x00020149,
@@ -1137,6 +1163,14 @@ int burn_drive_grab_dummy(struct burn_drive_info *drive_infos[], char *fname)
 		d->current_is_supported_profile = 1;
 		d->block_types[BURN_WRITE_TAO] = BURN_BLOCK_MODE1;
 		d->block_types[BURN_WRITE_SAO] = BURN_BLOCK_SAO;
+		if (testpath[0])
+			if (statvfs(testpath, &vfsbuf) != -1)
+				size = ((off_t) vfsbuf.f_bsize) *
+						 (off_t) vfsbuf.f_bavail;
+		d->media_capacity_remaining = size + add_size;
+
+		/* >>> ? open file for a test ? */; 
+
 	} else
 		d->current_profile = 0; /* Drives return this if empty */
 
@@ -1731,14 +1765,14 @@ off_t burn_disc_available_space(struct burn_drive *d,
 	if (d->drive_role == 0)
 		return 0;
 	if (d->drive_role == 2) {
-
+		if (d->media_capacity_remaining <= 0)
-		/* >>> how to estimate available space for a stdio file ? */
+			d->media_capacity_remaining = 
-		return ((off_t) (1024 * 1024 * 1024) * (off_t) 2048);
+				((off_t) (1024 * 1024 * 1024) * (off_t) 2048);
-
+	} else {
+		if (o != NULL)
+			d->send_write_parameters(d, o);
+		d->get_nwa(d, -1, &lba, &nwa);
 	}
-	if (o != NULL)
-		d->send_write_parameters(d, o);
-	d->get_nwa(d, -1, &lba, &nwa);
 	if (o != NULL) {
 		if (o->start_byte > 0) {
 			if (o->start_byte > d->media_capacity_remaining)
@@ -1938,6 +1972,8 @@ int burn_disc_get_multi_caps(struct burn_drive *d, enum burn_write_types wt,
 	int status, num_formats, ret, type, i;
 	off_t size;
 	unsigned dummy;
+	struct statvfs vfsbuf;
+	struct stat stbuf;
 
 	*caps = NULL;
 	s = burn_disc_get_status(d);
@@ -1963,11 +1999,14 @@ int burn_disc_get_multi_caps(struct burn_drive *d, enum burn_write_types wt,
 	if (d->drive_role == 2) {
 		/* stdio file dummy drive */
 		o->start_adr = 1;
-
+		size = d->media_capacity_remaining;
-		size = ((off_t) (1024 * 1024 * 1024) * (off_t) 2048);
+		if (stat(d->devname, &stbuf) != -1)
-		/* >>> obtain realistic file size */
+			if(S_ISREG(stbuf.st_mode))
+				if (statvfs(d->devname, &vfsbuf) != -1)
+					size = ((off_t) vfsbuf.f_bsize) *
+						 (off_t) vfsbuf.f_bavail;
+		d->media_capacity_remaining = 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;

libburn/libdax_msgs.h

@@ -305,6 +305,7 @@ Range "scdbackup"          :  0x00020000 to 0x0002ffff
  0x00020006 (FATAL,HIGH)   = Too many scsi siblings
  0x00020007 (NOTE,HIGH)    = Closed O_EXCL scsi siblings
  0x00020008 (SORRY,HIGH)   = Device busy. Failed to fcntl-lock
+ 0x00020009 (SORRY,HIGH)   = Neither stdio-path nor its directory exist
            
  General library operations: