New option -extract_cut

xorriso/xorriso.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 XORRISO 1 "Aug 27, 2008"
+.TH XORRISO 1 "Sep 02, 2008"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -1875,6 +1875,20 @@ restored.
 Performs -extract with each of the iso_rr_path arguments. disk_path will be
 composed from iso_rr_path by replacing iso_rr_prefix by disk_prefix.
 .TP
+\fB\-extract_cut\fR iso_rr_path byte_offset byte_count disk_path
+Copy a byte interval from a data file out of an ISO image into a newly created
+disk file.
+Two restrictions apply:
+.br
+The data bytes of iso_rr_path need to be already stored in the loaded ISO image
+and byte_offset must be a multiple of 2048, e.g. an integer with suffix
+s, m, or g.
+.br
+This option is implemented by a special run of -check_media.
+Its main purpose is to allow handling of large files if they are not supported
+by mount -t iso9660 and if the reading system is unable to buffer them as
+a whole.
+.TP
 \fB\-cpx\fR iso_rr_path [***] disk_path
 Extract single leaf file objects from the ISO image and store them under
 the address given by disk_path. If more then one iso_rr_path is given then

xorriso/xorriso.c

@@ -3227,6 +3227,8 @@ int Checkmediajob_new(struct CheckmediajoB **o, int flag)
  strcpy(m->abort_file_path, "/var/opt/xorriso/do_abort_check_media");
  m->data_to_path[0]= 0;
  m->data_to_fd= -1;
+ m->data_to_offset= 0;
+ m->data_to_limit= -1;
  m->patch_lba0= 0;
  m->patch_lba0_msc1= -1;
  m->sector_map_path[0]= 0;
@@ -10731,6 +10733,44 @@ int Xorriso_option_extract(struct XorrisO *xorriso, char *iso_path,
 }
 
 
+/* Option -extract_cut */
+int Xorriso_option_extract_cut(struct XorrisO *xorriso, char *isorr_path,
+               char *start, char *count, char *disk_path, int flag)
+{
+ int ret;
+ double num;
+ off_t startbyte, bytecount;
+ 
+ num= Scanf_io_size(start, 0);
+ if(num<0 || num > 1.0e18) { /* 10^18 = 10^3 ^ 6 < 2^10 ^ 6 = 2^60 */
+   sprintf(xorriso->info_text,
+           "-extract_cut: startbyte address negative or much too large (%s)",
+           start);
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+   return(0);
+ }
+ startbyte= num;
+ num= Scanf_io_size(count, 0);
+ if(num<=0 || num > 1.0e18) {
+   sprintf(xorriso->info_text,
+           "-extract_cut: bytecount zero, negative or much too large (%s)",
+           count);
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+   return(0);
+ }
+ bytecount= num;
+ sprintf(xorriso->info_text, 
+         "-extract_cut from %s , byte %.f to %.f, and store as %s",
+         disk_path, (double) startbyte, (double) (startbyte+bytecount),
+         isorr_path);
+ Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "DEBUG", 0);
+
+ ret= Xorriso_extract_cut(xorriso, isorr_path, disk_path,
+                          startbyte, bytecount, 0); 
+ return(ret);
+}
+
+
 /* Option -file_size_limit */
 int Xorriso_option_file_size_limit(struct XorrisO *xorriso,
                                    int argc, char **argv, int *idx, int flag)
@@ -11399,6 +11439,8 @@ int Xorriso_option_help(struct XorrisO *xorriso, int flag)
 "                 Perform -extract_r with each iso_rr_path.",
 "  -extract_single iso_rr_path disk_path",
 "                 Like -extract but with directory do not restore sub tree.",
+"  -extract_cut iso_rr_path byte_offset byte_count disk_path",
+"                 Copy a byte interval from iso_rr_path to disk_path.",
 "  -cpx iso_rr_path [***] disk_path",
 "                 Copy leaf file objects from ISO image to disk filesystem.",
 "  -cpax iso_rr_path [***] disk_path",
@@ -13469,7 +13511,7 @@ int Xorriso_count_args(struct XorrisO *xorriso, int argc, char **argv,
     ""
  };
  static char arg4_commands[][40]= {
-    "cut_out", "paste_in",
+    "cut_out","extract_cut","paste_in",
     ""
  };
  static char argn_commands[][40]= {
@@ -13761,6 +13803,17 @@ next_command:;
    (*idx)+= 2;
    ret= Xorriso_option_extract(xorriso, arg1, arg2, 0);
 
+ } else if(strcmp(cmd,"extract_cut")==0) {
+   (*idx)+= 4;
+   if((*idx)>argc) {
+     sprintf(xorriso->info_text,
+            "-extract_cut: Not enough arguments. Needed are: disk_path start count so_rr_path");
+     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+     ret= 0;
+   } else
+     ret= Xorriso_option_extract_cut(xorriso, arg1, arg2,
+                                     argv[(*idx)-2], argv[(*idx)-1], 0);
+
  } else if(strcmp(cmd,"extract_l")==0) {
    ret= Xorriso_option_map_l(xorriso, argc, argv, idx, 3<<8);
 

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2008.08.27.122127"
+#define Xorriso_timestamP "2008.09.02.164803"

xorriso/xorrisoburn.c

@@ -2398,8 +2398,10 @@ int Xorriso_restore_is_identical(struct XorrisO *xorriso, void *in_node,
 #ifdef Xorriso_libisofs_0_6_7
 
  ret= Xorriso__file_start_lba(node, &dummy, 0);
- if(ret != 0)
+ if(ret != 0) {
+   Xorriso_process_msg_queues(xorriso, 0);
    return(0);
+ }
 
 #else /* Xorriso_libisofs_0_6_7 */
 
@@ -2661,8 +2663,12 @@ int Xorriso_tree_restore_node(struct XorrisO *xorriso, IsoNode *node,
      if(wanted>todo)
        wanted= todo;
      ret= Xorriso_iso_file_read(xorriso, data_stream, buf, wanted, 0);
-     if(ret<=0)
+     if(ret<=0) {
+
+       /* >>> eventually call Xorriso_read_file_data() */;
+
    break;
+     }
      wret= write(write_fd, buf, ret);
      if(wret>=0) {
        todo-= wret;
@@ -3650,8 +3656,17 @@ int Xorriso_toc(struct XorrisO *xorriso, int flag)
        }
        if(flag&(1|4))
          ret= 0;
-       else
+       else {
          ret= isoburn_read_iso_head(drive, lba, &image_blocks, volume_id, 1);
+         if(image_blocks > track_size) {
+           sprintf(xorriso->info_text,
+              "Session %d bears ISO image size %ds larger than track size %ds",
+              session_no + 1, image_blocks, track_size);
+           Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "WARNING",
+                               0);
+           image_blocks= track_size;
+         }
+       }
        if(ret>0 && track_no==0) {
          sprintf(respt, "ISO session  : %3d , %9d , %9ds , %s\n",
                  session_no+1, lba, image_blocks , volume_id);
@@ -4188,7 +4203,7 @@ int Xorriso__node_lba_cmp(const void *node1, const void *node2)
  int lba1= 0, lba2= 0;
 
  ret= Xorriso__file_start_lba(*((IsoNode **) node1), &lba1, 0);
- if(ret!=1)
+ if(ret!=1) 
    lba1= 0;
  ret= Xorriso__file_start_lba(*((IsoNode **) node2), &lba2, 0);
  if(ret!=1)
@@ -5675,8 +5690,10 @@ int Xorriso_file_eval_damage(struct XorrisO *xorriso, IsoNode *node,
 
  ret= Xorriso__start_end_lbas(node, &lba_count, &start_lbas, &end_lbas,
                               &size, 0);
- if(ret <= 0)
+ if(ret <= 0) {
+   Xorriso_process_msg_queues(xorriso, 0);
    return(ret);
+ }
  for(sect= 0; sect < lba_count; sect++) {
    for(i= start_lbas[sect]; i <= end_lbas[sect]; i+= sector_size) {
      if(Sectorbitmap_is_set(map, i / sector_size, 0) == 0) {
@@ -5711,8 +5728,10 @@ int Xorriso_report_lba(struct XorrisO *xorriso, char *show_path,
 
  ret= Xorriso__start_end_lbas(node, &lba_count, &start_lbas, &end_lbas,
                               &size, 0);
- if(ret < 0)
+ if(ret < 0) {
+   Xorriso_process_msg_queues(xorriso, 0);
    {ret= -1; goto ex;}
+ }
  if(ret == 0)
    {ret= 1; goto ex;} /* it is ok to ignore other types */
  for(i= 0; i < lba_count; i++) {
@@ -5964,8 +5983,10 @@ int Xorriso_findi_test(struct XorrisO *xorriso, struct FindjoB *job,
  if(start_lba >= 0 && end_lba >= 0) {
    ret= Xorriso__start_end_lbas(node, &lba_count,
                                 &file_start_lbas, &file_end_lbas, &size, 0);
-   if(ret <= 0)
+   if(ret <= 0) {
+     Xorriso_process_msg_queues(xorriso, 0);
      goto ex;
+   }
    for(i= 0; i < lba_count; i++) {
      if(file_end_lbas[i] < start_lba || file_start_lbas[i] > end_lba)
        {ret= 0; goto ex;}
@@ -7132,7 +7153,7 @@ int Xorriso_check_interval(struct XorrisO *xorriso, struct SpotlisT *spotlist,
  struct burn_drive *drive;
  struct burn_drive_info *dinfo;
  char data[64*1024], sfe[5*SfileadrL];
- off_t data_count, to_read;
+ off_t data_count, to_read, read_count= 0, write_amount;
  double pre_read_time, post_read_time, time_diff, total_time_diff= 0;
  double last_abort_file_time= 0;
  struct stat stbuf;
@@ -7285,10 +7306,18 @@ abort_check:;
        if(time_diff > 1.0 && i > 0)
          quality= Xorriso_read_quality_sloW;
      }
+
+     write_amount= data_count;
      if(data_count > 0) {
+       read_count+= data_count;
+       if(job->data_to_limit >= 0 && read_count > job->data_to_limit)
+         write_amount-= (read_count - job->data_to_limit);
+     }
+     if(write_amount > 0) {
        if(job->data_to_fd >= 0) {
-         ret= lseek(job->data_to_fd, ((off_t) (i + from_lba)) * (off_t) 2048,
+         ret= lseek(job->data_to_fd,
-                    SEEK_SET);
+                 ((off_t) (i + from_lba)) * (off_t) 2048 + job->data_to_offset,
+                 SEEK_SET);
          if(ret == -1) {
 failed_to_write:;
            sprintf(xorriso->info_text, "Cannot write %d bytes to lba %d of %s",
@@ -7298,7 +7327,7 @@ failed_to_write:;
                                "FAILURE", 0);
            {ret= 0; goto ex;}
          }
-         ret= write(job->data_to_fd, data, data_count);
+         ret= write(job->data_to_fd, data, write_amount);
          if(ret == -1)
            goto failed_to_write;
        }
@@ -7525,3 +7554,158 @@ ex:;
    burn_disc_free_multi_caps(&caps);
  return(ret);
 }
+
+
+int Xorriso_read_file_data(struct XorrisO *xorriso, IsoNode *node,
+                           char *img_path, char *disk_path,
+                           off_t img_offset, off_t disk_offset,
+                           off_t bytes, int flag)
+{
+ int ret, i, lba_count= 0, *start_lbas= NULL, *end_lbas= NULL, read_chunk= 16;
+ int lba, count;
+ off_t size= 0, file_base_bytes= 0, file_processed_bytes= 0, img_adr;
+ off_t new_file_base_bytes, upto_file_bytes;
+ char sfe[5*SfileadrL];
+ struct SpotlisT *spotlist= NULL;
+ struct CheckmediajoB *job= NULL;
+
+ upto_file_bytes= img_offset + bytes;
+
+ /* >>> make Xorriso_check_interval() ready for copying in byte granularity */
+ if(img_offset % (off_t) 2048) {
+   sprintf(xorriso->info_text,
+           "Image address offset is not a multiple of 2048");
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+   ret= 0; goto ex;
+ }
+
+ ret= Xorriso__start_end_lbas(node, &lba_count, &start_lbas, &end_lbas, &size,
+                              0);
+ if(ret <= 0) {
+   Xorriso_process_msg_queues(xorriso,0);
+   sprintf(xorriso->info_text,
+           "File object %s is currently not a data file from the loaded image",
+           Text_shellsafe(img_path, sfe, 0));
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+   goto ex;
+ }
+ if(img_offset + bytes < size && bytes > 0)
+   size= img_offset + bytes;
+
+ ret= Checkmediajob_new(&job, 0);
+ if(ret <= 0)
+   goto ex;
+ ret= Spotlist_new(&spotlist, 0);
+ if(ret <= 0)
+   {ret= -1; goto ex;}
+
+ /* do overall job programming: 
+    >>> ??? time_limit, item_limit
+    >>> ??? abort_file_path
+ */
+ if(Sfile_str(job->data_to_path, disk_path, 0) <= 0)
+   {ret= -1; goto ex;}
+
+ Xorriso_open_job_data_to(xorriso, job, 0);
+ if(ret <= 0)
+   goto ex;
+
+ for(i= 0; i < lba_count && file_base_bytes < upto_file_bytes; i++) {
+   lba= start_lbas[i];
+   count= end_lbas[i] + 1 - start_lbas[i];
+   new_file_base_bytes= file_base_bytes + ((off_t) count) * (off_t) 2048;
+
+   /* skip intervals before img_offset */
+   if(new_file_base_bytes <= img_offset) {
+     file_base_bytes= new_file_base_bytes;
+ continue;
+   }
+   /* Eventually adjust first interval start */
+   img_adr= ((off_t) lba) * (off_t) 2048;
+   if(file_base_bytes < img_offset) {
+     img_adr+= img_offset - file_base_bytes;
+     lba= img_adr / (off_t) 2048;
+     count= end_lbas[i] + 1 - lba;
+     file_base_bytes= img_offset;
+   }
+
+   /* Eventually omit surplus blocks */
+   if(new_file_base_bytes > upto_file_bytes)
+     count-= (new_file_base_bytes - upto_file_bytes) / (off_t) 2048;
+   /* adjust job */
+   job->data_to_offset= file_processed_bytes - img_adr + disk_offset;
+   job->data_to_limit= size - file_base_bytes;
+
+   file_processed_bytes+= ((off_t) count) * (off_t) 2048;
+   ret= Xorriso_check_interval(xorriso, spotlist, job, lba, count, read_chunk,
+                               0);
+   if(ret <= 0)
+     goto ex;
+   if (ret == 2) {
+     sprintf(xorriso->info_text, "Attempt aborted to extract data from %s",
+             Text_shellsafe(img_path, sfe, 0));
+     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+     ret= 0; goto ex;
+   }
+   file_base_bytes= new_file_base_bytes;
+ } 
+
+ /* >>> use spotlist to evaluate damage */;
+
+ ret= 1;
+ex:;
+ if(start_lbas != NULL)
+   free((char *) start_lbas);
+ if(end_lbas != NULL)
+   free((char *) end_lbas);
+ Spotlist_destroy(&spotlist, 0);
+ Checkmediajob_destroy(&job, 0);
+ return(ret);
+}
+
+
+int Xorriso_extract_cut(struct XorrisO *xorriso,
+                        char *img_path, char *disk_path,
+                        off_t img_offset, off_t bytes, int flag)
+{
+ int ret, stbuf_ret;
+ double mem_lut= 0.0;
+ char eff_img_path[SfileadrL], eff_disk_path[SfileadrL];
+ IsoImage *volume;
+ IsoNode *node;
+
+ ret= Xorriso_get_volume(xorriso, &volume, 0); 
+ if(ret<=0)
+   return(ret);
+ ret= Xorriso_normalize_img_path(xorriso, xorriso->wdi,
+                                 img_path, eff_img_path, 0);
+ if(ret<=0)
+   return(ret);
+ ret= Xorriso_node_from_path(xorriso, volume, eff_img_path, &node, 0);
+ if(ret<=0)
+   return(ret);
+ ret= Xorriso_normalize_img_path(xorriso, xorriso->wdx,
+                                 disk_path, eff_disk_path, 2 | 4);
+ if(ret<=0)
+   return(ret);
+ Xorriso_pacifier_reset(xorriso, 0);
+ mem_lut= xorriso->last_update_time;
+
+ ret= Xorriso_handle_collision(xorriso, node, img_path, eff_disk_path,
+                               disk_path, &stbuf_ret, 0);
+ if(ret<=0 || ret==3)
+   return(0);
+ ret= Xorriso_read_file_data(xorriso, node, eff_img_path, eff_disk_path,
+                             img_offset, (off_t) 0, bytes, 0);
+ if(ret<=0)
+   return(ret);
+ ret= Xorriso_restore_properties(xorriso, eff_disk_path, node, 0);
+ if(ret<=0)
+   return(ret);
+
+ if(mem_lut != xorriso->last_update_time)
+   Xorriso_pacifier_callback(xorriso, "sectors examined",
+                             xorriso->pacifier_count, 0, "", 1);
+ return(1);
+}
+

xorriso/xorrisoburn.h

@@ -310,6 +310,8 @@ struct CheckmediajoB {
 
  char data_to_path[SfileadrL];
  int data_to_fd;
+ off_t data_to_offset; /* usually 0 with image copy, negative with file copy */
+ off_t data_to_limit;  /* used with file copy */
  int patch_lba0;
  int patch_lba0_msc1;
 
@@ -332,6 +334,9 @@ struct CheckmediajoB {
 int Xorriso_check_media(struct XorrisO *xorriso, struct SpotlisT **spotlist,
                         struct CheckmediajoB *job, int flag);
 
+int Xorriso_extract_cut(struct XorrisO *xorriso,
+                        char *img_path, char *disk_path,
+                        off_t img_offset, off_t bytes, int flag);
 
 #endif /* Xorrisoburn_includeD */