New boot_image boot specs partition_offset, partition_hd_cyl, partition_sec_hd

xorriso/base_obj.c

@@ -207,6 +207,9 @@ int Xorriso_new(struct XorrisO ** xorriso,char *progname, int flag)
  m->system_area_disk_path[0]= 0;
  m->system_area_options= 0;
  m->patch_system_area= 0;
+ m->partition_offset= 0;
+ m->partition_secs_per_head= 0;
+ m->partition_heads_per_cyl= 0;
  m->vol_creation_time= 0;
  m->vol_modification_time= 0;
  m->vol_expiration_time= 0;

xorriso/opts_a_c.c

@@ -791,6 +791,40 @@ treatment_patch:;
    } else
      was_ok= 0;
 
+ } else if(strncmp(treatpt, "partition_offset=", 17)==0) {
+   u= 0;
+   sscanf(treatpt + 17, "%u", &u);
+   if(u > 0 && u < 16) {
+     sprintf(xorriso->info_text,
+      "-boot_image %s partition_offset= : Non-zero number too small (<16).",
+             formpt);
+     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+     return(0);
+   }
+   xorriso->partition_offset= u;
+
+ } else if(strncmp(treatpt, "partition_hd_cyl=", 17)==0) {
+   u= 0;
+   sscanf(treatpt + 17, "%u", &u);
+   if(u > 255) {
+     sprintf(xorriso->info_text,
+      "-boot_image %s partition_hd_cyl= : Number too large (>255).", formpt);
+     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+     return(0);
+   }
+   xorriso->partition_heads_per_cyl= u;
+
+ } else if(strncmp(treatpt, "partition_sec_hd=", 17)==0) {
+   u= 0;
+   sscanf(treatpt + 17, "%u", &u);
+   if(u > 63) {
+     sprintf(xorriso->info_text,
+      "-boot_image %s partition_sec_hd= : Number too large (>63).", formpt);
+     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+     return(0);
+   }
+   xorriso->partition_secs_per_head= u;
+
  } else if(strncmp(treatpt, "platform_id=", 12)==0) {
    if(strncmp(treatpt + 12, "0x", 2) == 0)
      sscanf(treatpt + 14, "%x", &u);

xorriso/text_io.c

@@ -512,7 +512,7 @@ int Xorriso_write_to_channel(struct XorrisO *xorriso,
 bit15= with bit1 or bit2: close depicted log file
 */
 {
- char *rpt, *npt, *text;
+ char *rpt, *npt, *text= NULL;
  int ret= 1, info_redirected= 0, result_redirected= 0;
  char prefix[16];
  FILE *logfile_fp, *pktlog_fp;
@@ -520,11 +520,11 @@ bit15= with bit1 or bit2: close depicted log file
  static int num_channels= 4;
  static char channel_prefixes[4][4]= {".","R","I","M"};
 
+ text= in_text; /* might change due to backslash encoding */
+
  if(channel_no<0 || channel_no>=num_channels)
    {ret= -1; goto ex;}
 
- text= in_text; /* might change due to backslash encoding */
-
  /* Logfiles */
  logfile_fp= xorriso->logfile_fp[channel_no];
  pktlog_fp= xorriso->pktlog_fp;
@@ -1278,7 +1278,25 @@ int Xorriso_status(struct XorrisO *xorriso, char *filter, FILE *fp, int flag)
         Text_shellsafe(xorriso->system_area_disk_path, sfe, 0));
  if(!(is_default && no_defaults))
    Xorriso_status_result(xorriso,filter,fp,flag&2);
- if(xorriso->system_area_disk_path[0] || !part_table_implicit) {
+
+ is_default= (xorriso->partition_offset == 0);
+ sprintf(line,"-boot_image any partition_offset=%lu\n",
+              (unsigned long int) xorriso->partition_offset);
+ if(!(is_default && no_defaults))
+   Xorriso_status_result(xorriso,filter,fp,flag&2);
+ is_default= (xorriso->partition_secs_per_head == 0);
+ sprintf(line,"-boot_image any partition_sec_hd=%lu\n",
+              (unsigned long int) xorriso->partition_secs_per_head);
+ if(!(is_default && no_defaults))
+   Xorriso_status_result(xorriso,filter,fp,flag&2);
+ is_default= (xorriso->partition_heads_per_cyl == 0);
+ sprintf(line,"-boot_image any partition_hd_cyl=%lu\n",
+              (unsigned long int) xorriso->partition_heads_per_cyl);
+ if(!(is_default && no_defaults))
+   Xorriso_status_result(xorriso,filter,fp,flag&2);
+
+ if((xorriso->system_area_disk_path[0] || !part_table_implicit) &&
+    (xorriso->partition_offset == 0 || (xorriso->system_area_options & 2))) {
    is_default= ((xorriso->system_area_options & 3) == 0);
    sprintf(line,"-boot_image %s partition_table=%s\n",
            xorriso->system_area_options & 2 ? "isolinux" : "grub",

xorriso/write_run.c

@@ -308,6 +308,15 @@ do_set:;
                       0, "FAILURE", 1);
    {ret= 0; goto ex;}
  }
+ ret= isoburn_igopt_set_part_offset(sopts, xorriso->partition_offset,
+                                    xorriso->partition_secs_per_head,
+                                    xorriso->partition_heads_per_cyl);
+ if(ret != ISO_SUCCESS) {
+   Xorriso_process_msg_queues(xorriso,0);
+   Xorriso_report_iso_error(xorriso, "", ret,
+                       "Error when setting partition offset", 0, "FAILURE", 1);
+   {ret= 0; goto ex;}
+ }
  ret= 1;
 ex:;
  if(fp != NULL && fp != stdin)
@@ -522,6 +531,18 @@ int Xorriso_write_session(struct XorrisO *xorriso, int flag)
                                 "on attempt to write", 2);
  if(ret<=0)
    return(0);
+
+ /* <<< TWINTREE: preliminary */
+ if(xorriso->partition_offset > 0) {
+   s= isoburn_disc_get_status(drive);
+   if(s != BURN_DISC_BLANK) {
+     sprintf(xorriso->info_text,
+             "Output drive not blank with non-zero partition offset");
+     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+     {ret= 0; goto ex;}
+   }
+ }
+
  if(xorriso->out_drive_handle == xorriso->in_drive_handle) {
    source_drive= drive;
  } else {
@@ -680,6 +701,11 @@ int Xorriso_write_session(struct XorrisO *xorriso, int flag)
       ((!!(xorriso->do_md5 & 8)) * isoburn_igopt_file_stability);
  if(xorriso->no_emul_toc & 1)
    ext|= isoburn_igopt_no_emul_toc;
+
+ /* <<< TWINTREE: preliminary */
+ if(xorriso->partition_offset > 0)
+   ext|= isoburn_igopt_no_emul_toc;
+
  isoburn_igopt_set_extensions(sopts, ext);
  isoburn_igopt_set_relaxed(sopts, relax);
  isoburn_igopt_set_sort_files(sopts, 1);

xorriso/xorriso.1

@@ -9,7 +9,7 @@
 .\" 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 XORRISO 1 "Jul 30, 2010"
+.TH XORRISO 1 "Sep 04, 2010"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -2393,6 +2393,22 @@ then those parameters get updated when the new System Area is written.
 Special "system_area=/dev/zero" causes 32k of NUL-bytes.
 Use this to discard an MBR which eventually was loaded with the ISO image.
 .br
+\fBpartition_offset=\fR2kb_block_adr causes a partition table where the
+first partition begins at the given block address. This is counted in 2 kB
+blocks, not in 512 byte blocks. If the block address is non-zero then it must
+be at least 16. A non-zero partition offset causes two susperblocks to be
+generated and two sets of directory trees. The image is then mountable from its
+absolute start as well as from the partition start.
+.br
+Preliminary restrictions: Non-zero offset works only with blank output media
+and implies -compliance no_emul_toc.
+.br
+\fBpartition_sec_hd=\fRnumber gives the number of sectors per head for
+partition offset. 0 chooses a default value.
+.br
+\fBpartition_hd_cyl=\fRnumber gives the number of heads per cylinder for
+partition offset. 0 chooses a default value.
+.br
 .TP
 .B Character sets:
 .PP

xorriso/xorriso.info

@@ -2129,6 +2129,19 @@ of the existing sessions, unless one can assume overwriteable media.
      when the new System Area is written.
      Special "system_area=/dev/zero" causes 32k of NUL-bytes.  Use this
      to discard an MBR which eventually was loaded with the ISO image.
+     *partition_offset=*2kb_block_adr causes a partition table where the
+     first partition begins at the given block address. This is counted
+     in 2 kB blocks, not in 512 byte blocks. If the block address is
+     non-zero then it must be at least 16. A non-zero partition offset
+     causes two susperblocks to be generated and two sets of directory
+     trees. The image is then mountable from its absolute start as well
+     as from the partition start.
+     Preliminary restrictions: Non-zero offset works only with blank
+     output media and implies -compliance no_emul_toc.
+     *partition_sec_hd=*number gives the number of sectors per head for
+     partition offset. 0 chooses a default value.
+     *partition_hd_cyl=*number gives the number of heads per cylinder
+     for partition offset. 0 chooses a default value.
 
 
 File: xorriso.info,  Node: Charset,  Next: Exception,  Prev: Bootable,  Up: Options
@@ -4071,6 +4084,7 @@ File: xorriso.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * Ownership, global in ISO image, -uid:  SetWrite.            (line 162)
 * Ownership, in ISO image, -chown:       Manip.               (line  42)
 * Ownership, in ISO image, -chown_r:     Manip.               (line  47)
+* Partition offset, _definiton:          Bootable.            (line 142)
 * Partition table, _definiton:           Bootable.            (line 124)
 * Pathspec, _definition:                 SetInsert.           (line 120)
 * Pattern expansion, _definition:        Processing.          (line  22)
@@ -4183,37 +4197,37 @@ Node: Filter75390
 Node: Writing79739
 Node: SetWrite86028
 Node: Bootable97977
-Node: Charset106184
+Node: Charset107016
-Node: Exception108938
+Node: Exception109770
-Node: DialogCtl113453
+Node: DialogCtl114285
-Node: Inquiry115798
+Node: Inquiry116630
-Node: Navigate119928
+Node: Navigate120760
-Node: Verify127526
+Node: Verify128358
-Node: Restore135946
+Node: Restore136778
-Node: Emulation142602
+Node: Emulation143434
-Node: Scripting150325
+Node: Scripting151157
-Node: Frontend155887
+Node: Frontend156719
-Node: Examples157088
+Node: Examples157920
-Node: ExDevices158257
+Node: ExDevices159089
-Node: ExCreate158891
+Node: ExCreate159723
-Node: ExDialog160165
+Node: ExDialog160997
-Node: ExGrowing161427
+Node: ExGrowing162259
-Node: ExModifying162229
+Node: ExModifying163061
-Node: ExBootable162730
+Node: ExBootable163562
-Node: ExCharset163277
+Node: ExCharset164109
-Node: ExPseudo164105
+Node: ExPseudo164937
-Node: ExCdrecord164999
+Node: ExCdrecord165831
-Node: ExMkisofs165314
+Node: ExMkisofs166146
-Node: ExGrowisofs166317
+Node: ExGrowisofs167149
-Node: ExException167441
+Node: ExException168273
-Node: ExTime167895
+Node: ExTime168727
-Node: ExIncBackup168354
+Node: ExIncBackup169186
-Node: ExRestore171826
+Node: ExRestore172658
-Node: ExRecovery172795
+Node: ExRecovery173627
-Node: Files173361
+Node: Files174193
-Node: Seealso174589
+Node: Seealso175421
-Node: Legal175113
+Node: Legal175945
-Node: CommandIdx176035
+Node: CommandIdx176867
-Node: ConceptIdx189841
+Node: ConceptIdx190673
 
 End Tag Table

xorriso/xorriso.texi

@@ -44,7 +44,7 @@
 @c man .\" First parameter, NAME, should be all caps
 @c man .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 @c man .\" other parameters are allowed: see man(7), man(1)
-@c man .TH XORRISO 1 "Jul 30, 2010"
+@c man .TH XORRISO 1 "Sep 04, 2010"
 @c man .\" Please adjust this date whenever revising the manpage.
 @c man .\"
 @c man .\" Some roff macros, for reference:
@@ -2861,6 +2861,23 @@ then those parameters get updated when the new System Area is written.
 Special "system_area=/dev/zero" causes 32k of NUL-bytes.
 Use this to discard an MBR which eventually was loaded with the ISO image.
 @*
+@cindex Partition offset, _definiton
+@strong{partition_offset=}2kb_block_adr causes a partition table where the
+first partition begins at the given block address. This is counted in 2 kB
+blocks, not in 512 byte blocks. If the block address is non-zero then it must
+be at least 16. A non-zero partition offset causes two susperblocks to be
+generated and two sets of directory trees. The image is then mountable from its
+absolute start as well as from the partition start.
+@*
+Preliminary restrictions: Non-zero offset works only with blank output media
+and implies -compliance no_emul_toc.
+@*
+@strong{partition_sec_hd=}number gives the number of sectors per head for
+partition offset. 0 chooses a default value.
+@*
+@strong{partition_hd_cyl=}number gives the number of heads per cylinder for
+partition offset. 0 chooses a default value.
+@*
 @end table
 @c man .TP
 @c man .B Character sets:

xorriso/xorriso_private.h

@@ -19,6 +19,10 @@
 #define Xorriso_private_includeD yes
 
 
+/* for uint32_t */
+#include <stdint.h>
+
+
 /** The source code release timestamp */
 #include "xorriso_timestamp.h"
 #ifndef Xorriso_timestamP
@@ -302,6 +306,18 @@ struct XorrisO { /* the global context of xorriso */
                                          area of the image, if no 
                                          system_area_disk_path is set.
                                        */
+
+ /* TWINTREE: The number of unclaimed 2K blocks before
+              start of partition 1 as of the MBR in system area.
+              If not 0 this will cause double volume descriptor sets
+              and double tree.
+ */
+ uint32_t partition_offset;
+ /* TWINTREE: Partition table parameter: 1 to 63, 0= disabled/default */
+ int partition_secs_per_head;
+ /* TWINTREE: 1 to 255, 0= disabled/default */
+ int partition_heads_per_cyl;
+
  /* User settable PVD time stamps */
  time_t vol_creation_time;
  time_t vol_modification_time;

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2010.09.05.113621"
+#define Xorriso_timestamP "2010.09.05.113655"