Made program behavior with --grow_overwriteable_iso more consistent

cdrskin/cdrskin.1

@@ -2,7 +2,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH CDRSKIN 1 "August 26, 2007"
+.TH CDRSKIN 1 "August 27, 2007"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -200,14 +200,16 @@ Best reader compatibility is achieved without it
 .br
 Currently types DVD+RW, DVD-RW and DVD-RAM can be overwritten via cdrskin.
 .br
-DVD+RW and DVD-RAM media get treated as blank media regardless wether they
+DVD+RW and DVD-RAM media need no special initial formatting. They offer a
-hold data or not. They need no special initial formatting.
+single continuous data area for blockwise random access.
+.br
 Option -audio is not allowed. Only one track is allowed.
 Option -multi cannot mark a recognizeable end of overwriteable media.
 Therefore -multi is banned unless ISO-9660 images shall be expandable by help
 of option --grow_overwriteable_iso.
 Without this option or without an ISO-9660 filesystem image present
-on media, -toc does not return information about the media content.
+on media, -toc does not return information about the media content and
+media get treated as blank regardless wether they hold data or not.
 .br
 Currently there is no difference between -sao and -tao. If ever, then -tao
 will be the mode which preserves the current behavior.
@@ -296,11 +298,11 @@ Print this list of blanking types.
 .TP
 all
 Blank an entire CD-RW or an unformatted DVD-RW.
-(See also --prodvd_cli_compatible)
+(See also --prodvd_cli_compatible, --grow_overwriteable_iso)
 .TP
 fast
 Minimally blank an entire CD-RW or blank an unformatted DVD-RW.
-(See also --prodvd_cli_compatible)
+(See also --prodvd_cli_compatible, --grow_overwriteable_iso)
 .TP
 format_overwrite
 Format a DVD-RW to "Restricted Overwrite". The user should bring some patience.
@@ -470,12 +472,6 @@ The following sessions can only be written in -tao mode. -multi is prohibited
 with DVD-R[W] DAO write mode. Option --prodvd_cli_compatible eventually makes
 -multi tolerable but cannot make it work.
 .br
-With overwriteable DVD media, -multi cannot mark the end of the session.
-So when adding a new session this end has to be determined from the payload.
-Currently only ISO-9660 filesystems can be used that way. See option
-.B \--grow_overwriteable_iso
-for lifting the ban on -multi. 
-.br
 In order to have all filesystem content accessible, the eventual ISO-9660
 filesystem of a follow-up
 session needs to be prepared in a special way by the filesystem formatter
@@ -486,6 +482,12 @@ To retrieve an archive file which was written as follow-up session,
 you may use option -toc to learn about the "lba" of the desired track number.
 This lba is the address of the 2048 byte block where the archive begins.
 .br
+With overwriteable DVD media, -multi cannot mark the end of the session.
+So when adding a new session this end has to be determined from the payload.
+Currently only ISO-9660 filesystems can be used that way. See option
+.B \--grow_overwriteable_iso
+for lifting the ban on -multi. 
+.br
 Note: -multi might make DVD media unreadable in some DVD-ROM drives.
 .TP
 .BI \-nopad
@@ -707,25 +709,31 @@ but adapted to the usage model of
 .B cdrskin -msinfo ; mkisofs -C -M | cdrskin [-multi] -
 .br
 --grow_overwriteable_iso does not hamper the use of true multi-session media.
-It demands nevertheless that the track source is a ISO-9660 filesystem image.
+I.e. it is possible to use the same cdrskin options with both kinds of media
-With overwriteable media and no option blank=fast|all present it expands an
+and to achieve similar results if ISO-9660 filesystem images are to be written.
-eventual ISO-9660 filesystem. It is assumed that this image's inner size
+This option implies option -isosize and therefore demands that the track
-description points to the end of the valuable data on media.
+source is a ISO-9660 filesystem image.
 .br
-Options -msinfo and -toc will then work for overwriteables. -toc will always
+With overwriteable media and no option blank=fast|all present it expands an
-show a single session with its size increasing with every added mkisofs image.
+eventual ISO-9660 filesystem on media. It is assumed that this image's inner
+size description points to the end of the valuable data.
+Overwriteable media with a recognizeable ISO-9660 size will be regarded as
+appendable rather than as blank. I.e. options -msinfo and -toc will work.
+-toc will always show a single session with its size increasing with
+every added mkisofs image.
+.br
+If not overriden by option write_start_address=, the track with the new image
+will be placed behind the end of the old one. One may use option
+assert_write_lba= to make sure that media state and mkisofs job do match.
 .br
 --grow_overwriteable_iso causes option blank=fast|all to invalidate an
 eventual ISO-9660 image by altering the first few bytes of block 16 on
 overwriteable media.
-.br
+Option -multi is tolerated in order not to hamper true multi-session media.
-If not overriden by option write_start_address=, the track with the new image
-will be placed at the end of the old one. One may use option assert_write_lba=
-to make sure that media state and mkisofs job do match.
 .br
 Note: The equivalent of growisofs -Z is
 .br
-(mkisofs | cdrskin --grow_overwriteable_iso blank=fast [-multi])
+.B mkisofs | cdrskin --grow_overwriteable_iso blank=fast [-multi]
 .br
 growisofs -dvd-compat is roughly equivalent to cdrskin without option -multi.
 .TP

cdrskin/cdrskin.c

@@ -3713,10 +3713,98 @@ adr_translation:;
 }
 
 
-/** Report media status s to the user */
+/** Read and buffer the start of an existing ISO-9660 image from
+    overwriteable target media.
+*/
+int Cdrskin_overwriteable_iso_size(struct CdrskiN *skin, int *size, int flag)
+{
+#ifdef Cdrskin_libburn_has_random_access_rW
+ int ret;
+ off_t data_count= 0;
+ double size_in_bytes;
+ char *buf;
+
+ buf= skin->overwriteable_iso_head;
+ if(!skin->media_is_overwriteable)
+   {ret= 0; goto ex;}
+ /* Read first 64 kB */
+ ret= burn_read_data(skin->grabbed_drive,(off_t) 0,buf,32*2048,&data_count,0);
+ if(ret<=0)
+   {ret= 0; goto ex;}
+ ret= Scan_for_iso_size((unsigned char *) (buf+16*2048), &size_in_bytes,0);
+ if(ret<=0) {
+   if(skin->verbosity>=Cdrskin_verbose_debuG)
+  ClN(fprintf(stderr,"cdrskin_debug: No detectable ISO-9660 size on media\n"));
+   {ret= 0; goto ex;}
+ }
+ if(skin->verbosity>=Cdrskin_verbose_debuG)
+   ClN(fprintf(stderr,"cdrskin_debug: detected ISO-9660 size : %.f  (%fs)\n",
+               size_in_bytes, size_in_bytes/2048.0));
+ if(size_in_bytes/2048.0>2147483647-1-16) {
+   fprintf(stderr,
+           "cdrskin: FATAL : ISO-9660 filesystem in terabyte size detected\n");
+   {ret= 0; goto ex;}
+ }
+ *size= size_in_bytes/2048.0;
+ if(size_in_bytes-((double) *size)*2048.0>0.0)
+   (*size)++;
+ if((*size)%16)
+   *size+= 16-((*size)%16);
+ if(skin->grow_overwriteable_iso==1)
+   skin->grow_overwriteable_iso= 2;
+ ret= 1;
+ex:;
+ return(ret);
+
+#else /* Cdrskin_libburn_has_random_access_rW */
+ return(-1);
+#endif
+}     
+
+
+int Cdrskin_invalidate_iso_head(struct CdrskiN *skin, int flag)
+{
+ int ret;
+ int size;
+
+ fprintf(stderr,
+   "cdrskin: blank=... : invalidating ISO-9660 head on overwriteable media\n");
+ ret= Cdrskin_overwriteable_iso_size(skin,&size,0);
+ if(ret<=0) {
+   fprintf(stderr,
+           "cdrskin: NOTE : Not an ISO-9660 file system. Left unaltered.\n");
+   return(2);
+ }
+ skin->overwriteable_iso_head[16*2048]=
+ skin->overwriteable_iso_head[16*2048+3]= 
+ skin->overwriteable_iso_head[16*2048+4]= 'x';
+ ret= burn_random_access_write(skin->grabbed_drive,(off_t) 16*2048,
+                               skin->overwriteable_iso_head+16*2048,
+                               (off_t) 16*2048,1);
+ return(ret);
+}
+
+
+/** Report media status s to the user
+    @param flag Bitfield for control purposes: 
+                bit0= permission to check for overwriteable ISO image
+*/
 int Cdrskin_report_disc_status(struct CdrskiN *skin, enum burn_disc_status s,
                                int flag)
 {
+ int ret, iso_size;
+
+ if(flag&1) {
+   if(skin->media_is_overwriteable && skin->grow_overwriteable_iso>0) {
+     if(skin->grow_overwriteable_iso==2)
+       ret= 1;
+     else
+       ret= Cdrskin_overwriteable_iso_size(skin,&iso_size,0);
+     if(ret>0)
+       s= BURN_DISC_APPENDABLE;
+   }
+ } 
+
  printf("cdrskin: status %d ",s);
  if(s==BURN_DISC_FULL) {
    printf("burn_disc_full \"There is a disc with data on it in the drive\"\n"); 
@@ -3951,77 +4039,6 @@ int Cdrskin_obtain_nwa(struct CdrskiN *skin, int *nwa, int flag)
 }
 
 
-/** Read and buffer the start of an existing ISO-9660 image from
-    overwriteable target media.
-*/
-int Cdrskin_overwriteable_iso_size(struct CdrskiN *skin, int *size, int flag)
-{
-#ifdef Cdrskin_libburn_has_random_access_rW
- int ret;
- off_t data_count= 0;
- double size_in_bytes;
- char *buf;
-
- buf= skin->overwriteable_iso_head;
- if(!skin->media_is_overwriteable)
-   {ret= 0; goto ex;}
- /* Read first 64 kB */
- ret= burn_read_data(skin->grabbed_drive,(off_t) 0,buf,32*2048,&data_count,0);
- if(ret<=0)
-   {ret= 0; goto ex;}
- ret= Scan_for_iso_size((unsigned char *) (buf+16*2048), &size_in_bytes,0);
- if(ret<=0) {
-   if(skin->verbosity>=Cdrskin_verbose_debuG)
-  ClN(fprintf(stderr,"cdrskin_debug: No detectable ISO-9660 size on media\n"));
-   {ret= 0; goto ex;}
- }
- if(skin->verbosity>=Cdrskin_verbose_debuG)
-   ClN(fprintf(stderr,"cdrskin_debug: detected ISO-9660 size : %.f  (%fs)\n",
-               size_in_bytes, size_in_bytes/2048.0));
- if(size_in_bytes/2048.0>2147483647-1-16) {
-   fprintf(stderr,
-           "cdrskin: FATAL : ISO-9660 filesystem in terabyte size detected\n");
-   {ret= 0; goto ex;}
- }
- *size= size_in_bytes/2048.0;
- if(size_in_bytes-((double) *size)*2048.0>0.0)
-   (*size)++;
- if((*size)%16)
-   *size+= 16-((*size)%16);
- skin->grow_overwriteable_iso= 2;
- ret= 1;
-ex:;
- return(ret);
-
-#else /* Cdrskin_libburn_has_random_access_rW */
- return(-1);
-#endif
-}     
-
-
-int Cdrskin_invalidate_iso_head(struct CdrskiN *skin, int flag)
-{
- int ret;
- int size;
-
- fprintf(stderr,
-   "cdrskin: blank=... : invalidating ISO-9660 head on overwriteable media\n");
- ret= Cdrskin_overwriteable_iso_size(skin,&size,0);
- if(ret<=0) {
-   fprintf(stderr,
-           "cdrskin: NOTE : Not an ISO-9660 file system. Left unaltered.\n");
-   return(2);
- }
- skin->overwriteable_iso_head[16*2048]= 0;
- skin->overwriteable_iso_head[16*2048+3]= 
- skin->overwriteable_iso_head[16*2048+4]= 'x';
- ret= burn_random_access_write(skin->grabbed_drive,(off_t) 16*2048,
-                               skin->overwriteable_iso_head+16*2048,
-                               (off_t) 16*2048,1);
- return(ret);
-}
-
-
 /** Perform -toc under control of Cdrskin_atip().
     @param flag Bitfield for control purposes:
                 bit0= do not list sessions separately (do it cdrecord style)
@@ -4158,7 +4175,7 @@ int Cdrskin_atip(struct CdrskiN *skin, int flag)
    return(ret);
  drive= skin->drives[skin->driveno].drive;
  s= burn_disc_get_status(drive);
- Cdrskin_report_disc_status(skin,s,0);
+ Cdrskin_report_disc_status(skin,s,1);
  if(s==BURN_DISC_APPENDABLE && skin->no_blank_appendable) {
    is_not_really_erasable= 1;
  } else if(s==BURN_DISC_EMPTY) {
@@ -4442,7 +4459,7 @@ int Cdrskin_blank(struct CdrskiN *skin, int flag)
 #endif
 
  if(skin->verbosity>=Cdrskin_verbose_progresS)
-   Cdrskin_report_disc_status(skin,s,0);
+   Cdrskin_report_disc_status(skin,s,1);
  do_format= skin->blank_format_type & 0xff;
  if(do_format == 1) {
    verb= "format";
@@ -4468,8 +4485,12 @@ int Cdrskin_blank(struct CdrskiN *skin, int flag)
    /* Forceful blanking to Sequential Recording for DVD-R[W] and CD-RW */
 
    if(!(profile_number == 0x14 || profile_number == 0x13 ||
-        profile_number == 0x0a))
+        profile_number == 0x0a)) {
+     if(skin->grow_overwriteable_iso>0 && skin->media_is_overwriteable)
+       goto pseudo_blank_ov;
+     else
        goto unsupported_format_type;
+   }
 
  } else if (do_format==1) {
    /* Formatting to become overwriteable for DVD-RW and DVD+RW */
@@ -4506,6 +4527,7 @@ int Cdrskin_blank(struct CdrskiN *skin, int flag)
    /* Classical blanking of erasable media */
 
    if(skin->grow_overwriteable_iso>0 && skin->media_is_overwriteable) {
+pseudo_blank_ov:;
      if(skin->dummy_mode) {
        fprintf(stderr,
      "cdrskin: would have begun to pseudo-blank disc if not in -dummy mode\n");
@@ -5449,6 +5471,8 @@ int Cdrskin_grow_overwriteable_iso(struct CdrskiN *skin, int flag)
    fprintf(stderr,"cdrskin: SORRY : No recognizable ISO-9660 on media\n");
    return(0);
  }
+ if(skin->write_start_address>=0.0)
+   media_size= skin->write_start_address;
 
  /* Write new sum into media descr 0 */
  md= skin->overwriteable_iso_head+16*2048;
@@ -5534,7 +5558,7 @@ int Cdrskin_burn(struct CdrskiN *skin, int flag)
  drive= skin->drives[skin->driveno].drive;
  s= burn_disc_get_status(drive);
  if(skin->verbosity>=Cdrskin_verbose_progresS)
-   Cdrskin_report_disc_status(skin,s,0);
+   Cdrskin_report_disc_status(skin,s,1);
 
 
 #ifndef Cdrskin_libburn_write_mode_ruleS
@@ -6007,9 +6031,11 @@ int Cdrskin_msinfo(struct CdrskiN *skin, int flag)
    if(skin->grow_overwriteable_iso==1 || skin->grow_overwriteable_iso==2) {
      lba= 0;
      ret= Cdrskin_overwriteable_iso_size(skin,&nwa,0);
-     if(ret>0)
+     if(ret>0) {
+       s= BURN_DISC_APPENDABLE;
        goto put_out;
      }
+   }
    Cdrskin_report_disc_status(skin,s,0);
    fprintf(stderr,"cdrskin: FATAL : -msinfo can only operate on appendable (i.e. -multi) discs\n");
    if(skin->grow_overwriteable_iso>0)

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.08.26.200829"
+#define Cdrskin_timestamP "2007.08.28.143057"