New option -early_drive_test

libisoburn/trunk/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: SetInsert50986
-Node: Manip59553
-Node: CmdFind68234
-Node: Filter79534
-Node: Writing83883
-Node: SetWrite90172
-Node: Bootable104113
-Node: Jigdo117431
-Node: Charset121689
-Node: Exception124440
-Node: DialogCtl128955
-Node: Inquiry131542
-Node: Navigate135919
-Node: Verify143859
-Node: Restore152448
-Node: Emulation159104
-Node: Scripting168940
-Node: Frontend174502
-Node: Examples175797
-Node: ExDevices176966
-Node: ExCreate177600
-Node: ExDialog178874
-Node: ExGrowing180136
-Node: ExModifying180938
-Node: ExBootable181439
-Node: ExCharset181986
-Node: ExPseudo182814
-Node: ExCdrecord183708
-Node: ExMkisofs184023
-Node: ExGrowisofs185359
-Node: ExException186483
-Node: ExTime186937
-Node: ExIncBackup187396
-Node: ExRestore191317
-Node: ExRecovery192286
-Node: Files192852
-Node: Seealso194080
-Node: Legal194660
-Node: CommandIdx195582
-Node: ConceptIdx209889
+Node: Insert41888
+Node: SetInsert51507
+Node: Manip60074
+Node: CmdFind68755
+Node: Filter80055
+Node: Writing84404
+Node: SetWrite90693
+Node: Bootable104634
+Node: Jigdo117952
+Node: Charset122210
+Node: Exception124961
+Node: DialogCtl129472
+Node: Inquiry132059
+Node: Navigate136436
+Node: Verify144376
+Node: Restore152965
+Node: Emulation159621
+Node: Scripting169457
+Node: Frontend175019
+Node: Examples176314
+Node: ExDevices177483
+Node: ExCreate178117
+Node: ExDialog179391
+Node: ExGrowing180653
+Node: ExModifying181455
+Node: ExBootable181956
+Node: ExCharset182503
+Node: ExPseudo183331
+Node: ExCdrecord184225
+Node: ExMkisofs184540
+Node: ExGrowisofs185876
+Node: ExException187000
+Node: ExTime187454
+Node: ExIncBackup187913
+Node: ExRestore191834
+Node: ExRecovery192803
+Node: Files193369
+Node: Seealso194597
+Node: Legal195177
+Node: CommandIdx196099
+Node: ConceptIdx210479
 
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