New option -early_drive_test

libisoburn/libisoburn.ver

@@ -161,6 +161,7 @@ Xorriso_option_displacement;
 Xorriso_option_drive_class;
 Xorriso_option_dummy;
 Xorriso_option_dvd_obs;
+Xorriso_option_early_drive_test;
 Xorriso_option_eject;
 Xorriso_option_end;
 Xorriso_option_errfile_log;

xorriso/base_obj.c

@@ -183,6 +183,7 @@ int Xorriso_new(struct XorrisO ** xorriso,char *progname, int flag)
  m->displacement= 0;
  m->displacement_sign= 0;
  m->drives_exclusive= 1;
+ m->early_stdio_test= 0;
  m->do_calm_drive= 1;
  m->indev[0]= 0;
  m->in_drive_handle= NULL;
@@ -306,7 +307,7 @@ int Xorriso_new(struct XorrisO ** xorriso,char *progname, int flag)
  m->errfile_mode= 0;
  m->errfile_fp= NULL;
  
- m->img_read_error_mode= 2;         /* abort faulty image reading with FATAL */
+ m->img_read_error_mode= 1;       /* abort faulty image reading with FAILURE */
  m->extract_error_mode= 1;          /* keep extracted files after read error */
  strcpy(m->return_with_text, "SORRY");
  Xorriso__text_to_sev(m->return_with_text, &m->return_with_severity, 0);

xorriso/drive_mgt.c

@@ -1,7 +1,7 @@
 
 /* xorriso - creates, loads, manipulates and burns ISO 9660 filesystem images.
 
-   Copyright 2007-2010 Thomas Schmitt, <scdbackup@gmx.net>
+   Copyright 2007-2011 Thomas Schmitt, <scdbackup@gmx.net>
 
    Provided under GPL version 2 or later.
 
@@ -225,6 +225,7 @@ int Xorriso_aquire_drive(struct XorrisO *xorriso, char *adr, int flag)
    if((xorriso->ino_behavior & (1 | 2)) && !(xorriso->do_aaip & (4 | 32)))
      aquire_flag|= 64;
    burn_preset_device_open(xorriso->drives_exclusive, 0, 0);
+   burn_allow_drive_role_4(1 | (xorriso->early_stdio_test & 6));
    ret= isoburn_drive_aquire(&dinfo, libburn_adr, aquire_flag);
    burn_preset_device_open(1, 0, 0);
    Xorriso_process_msg_queues(xorriso,0);
@@ -832,14 +833,18 @@ int Xorriso_toc(struct XorrisO *xorriso, int flag)
  if(profile_no == 0x0002 && s == BURN_DISC_EMPTY)
    profile_no= 0;
  sprintf(respt, "Media current: ");
+ drive_role= burn_drive_get_drive_role(drive);
  if (profile_no > 0 && ret > 0) {
    if (profile_name[0])
      sprintf(respt+strlen(respt), "%s", profile_name);
    else
      sprintf(respt+strlen(respt), "%4.4Xh", profile_no);
-   drive_role= burn_drive_get_drive_role(drive);
    if(drive_role==2)
      sprintf(respt+strlen(respt), ", overwriteable");
+   else if(drive_role == 4)
+     sprintf(respt+strlen(respt), ", random read-only");
+   else if(drive_role == 5)
+     sprintf(respt+strlen(respt), ", random write-only");
    else if(drive_role==0 || drive_role==3)
      sprintf(respt+strlen(respt), ", sequential");
    strcat(respt, "\n");
@@ -898,15 +903,21 @@ int Xorriso_toc(struct XorrisO *xorriso, int flag)
 
  if (disc==NULL) {
    Xorriso_process_msg_queues(xorriso,0);
-   ret= isoburn_get_min_start_byte(drive, &start_byte, 0);
+   if(drive_role == 5 && s == BURN_DISC_APPENDABLE) {
-   nwa= start_byte / 2048;
+     ret= burn_disc_track_lba_nwa(drive, NULL, 0, &lba, &nwa);
-   if(ret<=0) {
+     if(ret == 1)
-     Xorriso_process_msg_queues(xorriso,0);
+       num_data= nwa;
-     if(flag&1)
+   } else {
+     ret= isoburn_get_min_start_byte(drive, &start_byte, 0);
+     nwa= start_byte / 2048;
+     if(ret<=0) {
+       Xorriso_process_msg_queues(xorriso,0);
+       if(flag&1)
+         {ret= 0; goto ex;}
+       sprintf(xorriso->info_text, "Cannot obtain Table Of Content");
+       Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "SORRY", 0);
        {ret= 0; goto ex;}
-     sprintf(xorriso->info_text, "Cannot obtain Table Of Content");
+     }
-     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "SORRY", 0);
-     {ret= 0; goto ex;}
    }
 
    /* fabricate TOC */
@@ -921,13 +932,13 @@ int Xorriso_toc(struct XorrisO *xorriso, int flag)
              1, 0, image_blocks, volume_id);
      nwa= image_blocks;
    } else {
-     nwa= 0;
+     nwa= num_data;
      ret= burn_disc_get_formats(drive, &status, &size, &dummy,
                                 &num_formats);
      if(ret>0 && status==BURN_FORMAT_IS_FORMATTED)
        nwa= size/2048;
      sprintf(respt, "%13s: %3d , %9d , %9ds , \n",
-             typetext, 1, 0, nwa);
+             typetext, 1, num_data, nwa);
    } 
    if(!(flag&1))
      Xorriso_toc_line(xorriso, flag & 8);
@@ -1023,8 +1034,8 @@ int Xorriso_toc(struct XorrisO *xorriso, int flag)
    {ret= 1; goto ex;}
  num_wasted= lba - num_payload;
  num_nondata= lba - num_data;
- Sfile_scale(((double) num_data) * 2048.0, mem_text,5,1e4,1);
 
+ Sfile_scale(((double) num_data) * 2048.0, mem_text,5,1e4,1);
  sprintf(respt, "Media summary: %d session%s, %d data blocks, %s data",
          num_sessions, (num_sessions==1 ? "" : "s"), num_data, mem_text);
  num_free= isoburn_disc_available_space(drive, NULL); 
@@ -1293,6 +1304,12 @@ int Xorriso_atip(struct XorrisO *xorriso, int flag)
  else if(ret==3)
    sprintf(respt+strlen(respt), "%s\n",
            "Emulated (stdio-drive, sequential write-only)");
+ else if(ret == 4)
+   sprintf(respt+strlen(respt), "%s\n",
+           "Emulated (stdio-drive, 2k random read-only)");
+ else if(ret == 5)
+   sprintf(respt+strlen(respt), "%s\n",
+           "Emulated (stdio-drive, 2k random write-only)");
  else if(ret!=1)
    sprintf(respt+strlen(respt), "%s\n","Emulated (stdio-drive)");
  else

xorriso/opts_d_h.c

@@ -300,6 +300,23 @@ int Xorriso_option_dvd_obs(struct XorrisO *xorriso, char *obs, int flag)
 }
 
 
+/* Option -early_stdio_test */
+int Xorriso_option_early_stdio_test(struct XorrisO *xorriso, char *mode,
+                                    int flag)
+{
+ if(strcmp(mode, "on") == 0)
+   xorriso->early_stdio_test= 2 | 4;
+ else if(strcmp(mode, "off") == 0)
+   xorriso->early_stdio_test= 0;
+ else {
+   sprintf(xorriso->info_text, "-early_stdio_test: unknown mode '%s'", mode);
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "SORRY", 0);
+   return(0);
+ }
+ return(1);
+}
+
+
 /* Option -eject */
 /* @param flag bit0=do not report toc of eventually remaining drives
 */
@@ -1414,6 +1431,8 @@ int Xorriso_option_help(struct XorrisO *xorriso, int flag)
 "                 Enable production of scdbackup tag with -md5 on",
 "  -ban_stdio_write",
 "                 Allow for writing only the usage of optical drives.",
+"  -early_stdio_test",
+"                 Classify stdio drives by effective access permissions.",
 "  -blank \"fast\"|\"all\"|\"deformat\"|\"deformat_quickest\"",
 "                 Blank media resp. invalidate ISO image on media.",
 "  -format \"as_needed\"|\"full\"|\"fast\"|\"by_index_#\"|\"by_size_#\"",

xorriso/parse_exec.c

@@ -461,7 +461,7 @@ int Xorriso_count_args(struct XorrisO *xorriso, int argc, char **argv,
     "calm_drive","cd","cdi","cdx","charset","close",
     "commit_eject","compliance","copyright_file",
     "dev","dialog","disk_dev_ino","disk_pattern","displacement",
-    "dummy","dvd_obs","eject",
+    "dummy","dvd_obs","early_stdio_test", "eject",
     "iso_rr_pattern","follow","format","fs","gid","grow_blindly","hardlinks",
     "history","indev","in_charset","joliet",
     "list_delimiter","list_profiles","local_charset",
@@ -853,6 +853,10 @@ next_command:;
  } else if(strcmp(cmd,"dux")==0 || strcmp(cmd,"dusx")==0) {
    ret= Xorriso_option_lsx(xorriso, argc, argv, idx, (cmd[2]!='s')|4);
 
+ } else if(strcmp(cmd,"early_stdio_test")==0) {
+   (*idx)++;
+   ret= Xorriso_option_early_stdio_test(xorriso, arg1, 0);
+
  } else if(strcmp(cmd,"eject")==0) {
    (*idx)++;
    ret= Xorriso_option_eject(xorriso, arg1, 0);

xorriso/text_io.c

@@ -1242,6 +1242,12 @@ int Xorriso_status(struct XorrisO *xorriso, char *filter, FILE *fp, int flag)
    Xorriso_status_result(xorriso,filter,fp,flag&2);
  }
 
+ is_default= ((xorriso->early_stdio_test & 6) == 0);
+ sprintf(line, "-early_stdio_test %s\n",
+               xorriso->early_stdio_test & 6 ? "on" : "off");
+ if(!(is_default && no_defaults))
+   Xorriso_status_result(xorriso,filter,fp,flag&2);
+
  is_default= (xorriso->allow_restore==0 && xorriso->do_concat_split==1 &&
               xorriso->do_auto_chmod==0 && xorriso->drives_exclusive == 1);
  mode_pt= "off"; 

xorriso/write_run.c

@@ -1757,20 +1757,29 @@ int Xorriso_burn_track(struct XorrisO *xorriso, off_t write_start_address,
  if(isoburn_needs_emulation(drive)) {
    if(flag&1) {
      ret= isoburn_disc_track_lba_nwa(drive, burn_options, 0, &dummy, &nwa);
+     Xorriso_process_msg_queues(xorriso,0);
      if(ret<=0) {
-       Xorriso_process_msg_queues(xorriso,0);
        sprintf(xorriso->info_text,
      "Cannot obtain next writeable address of emulated multi-session media\n");
        Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
        ret= 0; goto ex;
      }
-     if(nwa==32)
+     if(nwa == 32 && disc_state != BURN_DISC_APPENDABLE)
        nwa= 0; /* No automatic toc emulation. Formatter might not be aware. */
-     burn_write_opts_set_start_byte(burn_options,((off_t) nwa) * (off_t) 2048);
    } else {
      nwa= 0;
-     burn_write_opts_set_start_byte(burn_options, (off_t) 0);
+     if (disc_state == BURN_DISC_APPENDABLE) {
+       ret= isoburn_disc_track_lba_nwa(drive, burn_options, 0, &dummy, &nwa);
+       Xorriso_process_msg_queues(xorriso,0);
+       if(ret<=0) {
+         sprintf(xorriso->info_text,
+        "Cannot obtain next writeable address of emulated appendable media\n");
+         Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+         ret= 0; goto ex;
+       }
+     }
    }
+   burn_write_opts_set_start_byte(burn_options,((off_t) nwa) * (off_t) 2048);
  }
 
  if(write_start_address>=0) {
@@ -2232,8 +2241,11 @@ int Xorriso_update_iso_lba0(struct XorrisO *xorriso, int iso_lba, int isosize,
  }
  if(iso_lba < 32)
    return(2);
+
  if(!(flag & 2)) {
    /* head_buffer was not filled yet. Read it from output media. */
+   if(burn_drive_get_drive_role(drive) == 5) /* write-only */
+     return(2);
    if(job != NULL && job->data_to_fd >= 0) {
      if((flag & 8) && job->sector_map != NULL) {
        ret= Sectorbitmap_bytes_are_set(job->sector_map,

xorriso/xorriso.1

@@ -873,6 +873,16 @@ Allow for writing only the usage of MMC optical drives. Disallow
 to write the result into files of nearly arbitrary type.
 Once set, this command cannot be revoked.
 .TP
+\fB\-early_stdio_test\fR "on"|"off"
+If enabled by "on" then regular files and block devices get tested for
+effective access permissions. This implies to try opening those files for
+writing, which otherwise will happen only later and only if actual
+writing is desired.
+.br
+The test result is used for classifying the pseudo drives as overwriteable,
+read-only, write-only, or uselessly empty. This may lead to earlier detection
+of severe problems, and may avoid some less severe error events.
+.TP
 .B Inserting files into ISO image:
 .PP
 The following commands expect file addresses of two kinds:
@@ -2867,9 +2877,9 @@ if the threshold of option -abort_on allows this.
 .br
 "failure" aborts image tree reading on first event of at least SORRY.
 It issues an own FAILURE event.
+This is the default.
 .br
 "fatal" acts like "failure" but issues the own event as FATAL.
-This is the default.
 .br
 With occasion "file_extraction" there are three behaviors:
 .br

xorriso/xorriso.h

@@ -802,6 +802,11 @@ int Xorriso_option_dummy(struct XorrisO *xorriso, char *mode, int flag);
 /* Option -dvd_obs "default"|"32k"|"64k" */
 int Xorriso_option_dvd_obs(struct XorrisO *xorriso, char *obs, int flag);
 
+/* Option -early_stdio_test */
+/* @since 1.0.6 */
+int Xorriso_option_early_stdio_test(struct XorrisO *xorriso, char *mode,
+                                    int flag);
+
 /* Option -eject */
 /* @param flag bit0=do not report toc of eventually remaining drives
 */

xorriso/xorriso.info

@@ -824,6 +824,16 @@ activate them only after image loading.
      to write the result into files of nearly arbitrary type.  Once
      set, this command cannot be revoked.
 
+-early_stdio_test "on"|"off"
+     If enabled by "on" then regular files and block devices get tested
+     for effective access permissions. This implies to try opening
+     those files for writing, which otherwise will happen only later
+     and only if actual writing is desired.
+     The test result is used for classifying the pseudo drives as
+     overwriteable, read-only, write-only, or uselessly empty. This may
+     lead to earlier detection of severe problems, and may avoid some
+     less severe error events.
+
 
 File: xorriso.info,  Node: Insert,  Next: SetInsert,  Prev: Loading,  Up: Options
 
@@ -2531,9 +2541,8 @@ failed unexpectedly.
      "best_effort" goes on with reading after events with severity
      below FAILURE if the threshold of option -abort_on allows this.
      "failure" aborts image tree reading on first event of at least
-     SORRY.  It issues an own FAILURE event.
+     SORRY.  It issues an own FAILURE event.  This is the default.
      "fatal" acts like "failure" but issues the own event as FATAL.
-     This is the default.
      With occasion "file_extraction" there are three behaviors:
      "keep" maintains incompletely extracted files on disk. This is the
      default.
@@ -4142,6 +4151,7 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
 * -dusx   show directory size on disk:   Navigate.            (line 101)
 * -dux   show directory size on disk:    Navigate.            (line  96)
 * -dvd_obs   set write block size:       SetWrite.            (line 236)
+* -early_stdio_test   classifies stdio drives: Loading.       (line 251)
 * -eject    ejects drive tray:           Writing.             (line  36)
 * -end   writes pending session and ends program: Scripting.  (line 122)
 * -errfile_log   logs problematic disk files: Scripting.      (line  84)
@@ -4326,6 +4336,7 @@ File: xorriso.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * disk_path, _definition:                Insert.              (line   6)
 * Drive, _definiton:                     Drives.              (line   6)
 * Drive, accessability, -drive_class:    Loading.             (line  54)
+* Drive, classify stdio, -early_stdio_test: Loading.          (line 251)
 * Drive, demand real MMC, -ban_stdio_write: Loading.          (line 246)
 * Drive, eject tray, -eject:             Writing.             (line  36)
 * Drive, for input and output, -dev:     AqDrive.             (line  10)
@@ -4538,46 +4549,46 @@ Node: Dialog21570
 Node: Options23227
 Node: AqDrive24835
 Node: Loading27741
-Node: Insert41367
+Node: Insert41888
-Node: SetInsert50986
+Node: SetInsert51507
-Node: Manip59553
+Node: Manip60074
-Node: CmdFind68234
+Node: CmdFind68755
-Node: Filter79534
+Node: Filter80055
-Node: Writing83883
+Node: Writing84404
-Node: SetWrite90172
+Node: SetWrite90693
-Node: Bootable104113
+Node: Bootable104634
-Node: Jigdo117431
+Node: Jigdo117952
-Node: Charset121689
+Node: Charset122210
-Node: Exception124440
+Node: Exception124961
-Node: DialogCtl128955
+Node: DialogCtl129472
-Node: Inquiry131542
+Node: Inquiry132059
-Node: Navigate135919
+Node: Navigate136436
-Node: Verify143859
+Node: Verify144376
-Node: Restore152448
+Node: Restore152965
-Node: Emulation159104
+Node: Emulation159621
-Node: Scripting168940
+Node: Scripting169457
-Node: Frontend174502
+Node: Frontend175019
-Node: Examples175797
+Node: Examples176314
-Node: ExDevices176966
+Node: ExDevices177483
-Node: ExCreate177600
+Node: ExCreate178117
-Node: ExDialog178874
+Node: ExDialog179391
-Node: ExGrowing180136
+Node: ExGrowing180653
-Node: ExModifying180938
+Node: ExModifying181455
-Node: ExBootable181439
+Node: ExBootable181956
-Node: ExCharset181986
+Node: ExCharset182503
-Node: ExPseudo182814
+Node: ExPseudo183331
-Node: ExCdrecord183708
+Node: ExCdrecord184225
-Node: ExMkisofs184023
+Node: ExMkisofs184540
-Node: ExGrowisofs185359
+Node: ExGrowisofs185876
-Node: ExException186483
+Node: ExException187000
-Node: ExTime186937
+Node: ExTime187454
-Node: ExIncBackup187396
+Node: ExIncBackup187913
-Node: ExRestore191317
+Node: ExRestore191834
-Node: ExRecovery192286
+Node: ExRecovery192803
-Node: Files192852
+Node: Files193369
-Node: Seealso194080
+Node: Seealso194597
-Node: Legal194660
+Node: Legal195177
-Node: CommandIdx195582
+Node: CommandIdx196099
-Node: ConceptIdx209889
+Node: ConceptIdx210479
 
 End Tag Table

xorriso/xorriso.texi

@@ -1096,6 +1096,18 @@ Mode "on" causes -calm_drive to be performed automatically after each -dev,
 Allow for writing only the usage of MMC optical drives. Disallow
 to write the result into files of nearly arbitrary type.
 Once set, this command cannot be revoked.
+@c man .TP
+@item -early_stdio_test "on"|"off"
+@kindex -early_stdio_test   classifies stdio drives
+@cindex Drive, classify stdio, -early_stdio_test
+If enabled by "on" then regular files and block devices get tested for
+effective access permissions. This implies to try opening those files for
+writing, which otherwise will happen only later and only if actual
+writing is desired.
+@*
+The test result is used for classifying the pseudo drives as overwriteable,
+read-only, write-only, or uselessly empty. This may lead to earlier detection
+of severe problems, and may avoid some less severe error events.
 @end table
 @c man .TP
 @c man .B Inserting files into ISO image:
@@ -3379,9 +3391,9 @@ if the threshold of option -abort_on allows this.
 @*
 "failure" aborts image tree reading on first event of at least SORRY.
 It issues an own FAILURE event.
+This is the default.
 @*
 "fatal" acts like "failure" but issues the own event as FATAL.
-This is the default.
 @*
 With occasion "file_extraction" there are three behaviors:
 @*

xorriso/xorriso_private.h

@@ -251,6 +251,13 @@ struct XorrisO { /* the global context of xorriso */
 
  int drives_exclusive;   /* burn_preset_device_open() param exclusive */
 
+ int early_stdio_test;   /* For burn_allow_drive_role_4():
+                            bit1= Test whether a stdio drive can be opened for
+                                  read-write resp. read-only resp. write only.
+                            bit2= Classify files which cannot be opened at all
+                                  as role 0 : useless dummy.
+                          */
+
  int do_calm_drive;      /* bit0= calm down drive after aquiring it */
 
  char indev[SfileadrL];

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2011.03.21.093208"
+#define Xorriso_timestamP "2011.03.21.093705"