Made clear that a drive needs an isoburn object for writing. Coverity CID 28758.

libisoburn/burn_wrap.c

@@ -920,40 +920,45 @@ void isoburn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
  ret= isoburn_find_emulator(&o, drive, 0);
  if(ret<0)
    goto ex;
- if(o!=NULL) {
-   o->wrote_well= -1;
-   if(o->emulation_mode!=0) {
-     burn_write_opts_set_multi(opts, 0);
-     if(o->emulation_mode>0 && o->nwa >= 0) {
-       nwa= o->nwa;
-
-       /* This caters for unwritten formatted DVD-RW. They need to be written
-          sequentially on the first use. Only written areas are random access.
-          If the first session is not written to LBA 0, then re-opening of
-          formatting and padding is needed. 
-          This can be done. But when the track gets closed after padding,
-          this lasts a long time. There is a high risk that an app will not
-          poll the message queue while waiting for  isoburn_disc_write()  to
-          return. The pacifier loop usually happens only afterwards.
-          So automatic formatting might cause a nervous clueless user.
+ if(o == NULL) {
+   sprintf(msg,
+          "Program error: Cannot find isoburn object associated to the drive");
+   isoburn_msgs_submit(o, 0x00060000, msg, 0, "FAILURE", 0);
+   burn_drive_cancel(drive);
+   goto ex;
+ }
+ o->wrote_well= -1;
+ if(o->emulation_mode!=0) {
+   burn_write_opts_set_multi(opts, 0);
+   if(o->emulation_mode>0 && o->nwa >= 0) {
+     nwa= o->nwa;
+
+     /* This caters for unwritten formatted DVD-RW. They need to be written
+        sequentially on the first use. Only written areas are random access.
+        If the first session is not written to LBA 0, then re-opening of
+        formatting and padding is needed. 
+        This can be done. But when the track gets closed after padding,
+        this lasts a long time. There is a high risk that an app will not
+        poll the message queue while waiting for  isoburn_disc_write()  to
+        return. The pacifier loop usually happens only afterwards.
+        So automatic formatting might cause a nervous clueless user.
+     */
+     ret= isoburn_is_intermediate_dvd_rw(drive, 0);
+     if(ret>0 && nwa>0 && nwa <= o->zero_nwa) {
+       /* actually this should not happen since such media get recognized
+          by isoburn_welcome_media and o->zero_nwa gets set to 0
        */
-       ret= isoburn_is_intermediate_dvd_rw(drive, 0);
-       if(ret>0 && nwa>0 && nwa <= o->zero_nwa) {
-         /* actually this should not happen since such media get recognized
-            by isoburn_welcome_media and o->zero_nwa gets set to 0
-         */
-         sprintf(msg,
-        "DVD-RW insufficiently formatted. (Intermediate State, size unknown)");
-         isoburn_msgs_submit(o, 0x00060000, msg, 0, "FAILURE", 0);
-         sprintf(msg,
-                "It might help to first deformat it and then format it again");
-         isoburn_msgs_submit(o, 0x00060000, msg, 0, "HINT", 0);
-         burn_drive_cancel(drive); /* mark run as failure */
-         goto ex;
-       }
-       /* end of DVD-RW oriented check */
-       burn_write_opts_set_start_byte(opts, nwa * (off_t) 2048);
+       sprintf(msg,
+      "DVD-RW insufficiently formatted. (Intermediate State, size unknown)");
+       isoburn_msgs_submit(o, 0x00060000, msg, 0, "FAILURE", 0);
+       sprintf(msg,
+              "It might help to first deformat it and then format it again");
+       isoburn_msgs_submit(o, 0x00060000, msg, 0, "HINT", 0);
+       burn_drive_cancel(drive); /* mark run as failure */
+       goto ex;
      }
+     /* end of DVD-RW oriented check */
+     burn_write_opts_set_start_byte(opts, nwa * (off_t) 2048);
    }
  }
 

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2015.11.03.150839"
+#define Xorriso_timestamP "2015.11.03.154102"