New -check_media option data_to="-" for standard output

xorriso/xorriso.info

@@ -3989,7 +3989,18 @@ transmission errors.
           gives the number of report list items after which to abort.
           Value -1 means unlimited item number.
      data_to=disk_path
-          copies the valid blocks to the given file.
+          copies the valid blocks to the given file, which must support
+          random access writing, unless disk_path is "-" which means
+          standard output.
+          In the latter case, patch_lba0= settings other than "off"
+          yield failure.  Further the usual result messages of
+          -check_media get redirected to the info channel.  But beware
+          of result messages from other commands.  Beware of -*dev "-"
+          which redirect standard output to standard error.  Keep the
+          run simple:
+          xorriso -indev /dev/sr0 -check_media data_to=- - | md5sum
+          xorriso -outdev /dev/sr0 -check_media data_to=- use=outdev \
+          what=disc min_lba=0 max_lba=999999 - | sha256sum
      event=severity
           sets the given severity for a problem event which shall be
           issued at the end of a check run if data blocks were
@@ -5419,8 +5430,8 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
 * -cdx sets working directory on disk:   Navigate.            (line  15)
 * -changes_pending overrides change status: Writing.          (line  12)
 * -charset sets input/output character set: Charset.          (line  54)
-* -check_md5 verifies file checksum:     Verify.              (line 173)
-* -check_md5_r verifies file tree checksums: Verify.          (line 187)
+* -check_md5 verifies file checksum:     Verify.              (line 184)
+* -check_md5_r verifies file tree checksums: Verify.          (line 198)
 * -check_media reads media block by block: Verify.            (line  21)
 * -check_media_defaults sets -check_media options: Verify.    (line  40)
 * -chgrp sets group in ISO image:        Manip.               (line  49)
@@ -5923,8 +5934,8 @@ File: xorriso.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * Verify, compare ISO and disk file, -compare: Navigate.      (line 131)
 * Verify, compare ISO and disk tree, -compare_r: Navigate.    (line 143)
 * Verify, compare ISO and disk, -compare_l: Navigate.         (line 147)
-* Verify, file checksum, -check_md5:     Verify.              (line 173)
-* Verify, file tree checksums, -check_md5_r: Verify.          (line 187)
+* Verify, file checksum, -check_md5:     Verify.              (line 184)
+* Verify, file tree checksums, -check_md5_r: Verify.          (line 198)
 * Verify, preset -check_media, -check_media_defaults: Verify. (line  40)
 * Write, block size, -dvd_obs:           SetWrite.            (line 336)
 * Write, bootability, -boot_image:       Bootable.            (line  75)
@@ -5985,33 +5996,33 @@ Node: DialogCtl190767
 Node: Inquiry193369
 Node: Navigate202251
 Node: Verify210708
-Node: Restore221179
-Node: Emulation230345
-Node: Scripting240801
-Node: Frontend248584
-Node: Examples258210
-Node: ExDevices259388
-Node: ExCreate260049
-Node: ExDialog261349
-Node: ExGrowing262620
-Node: ExModifying263429
-Node: ExBootable263939
-Node: ExCharset264494
-Node: ExPseudo265390
-Node: ExCdrecord266317
-Node: ExMkisofs266637
-Node: ExGrowisofs268534
-Node: ExException269687
-Node: ExTime270145
-Node: ExIncBackup270603
-Node: ExRestore274629
-Node: ExRecovery275575
-Node: Files276147
-Node: Environ277481
-Node: Seealso278229
-Node: Bugreport278946
-Node: Legal279537
-Node: CommandIdx280549
-Node: ConceptIdx298165
+Node: Restore221857
+Node: Emulation231023
+Node: Scripting241479
+Node: Frontend249262
+Node: Examples258888
+Node: ExDevices260066
+Node: ExCreate260727
+Node: ExDialog262027
+Node: ExGrowing263298
+Node: ExModifying264107
+Node: ExBootable264617
+Node: ExCharset265172
+Node: ExPseudo266068
+Node: ExCdrecord266995
+Node: ExMkisofs267315
+Node: ExGrowisofs269212
+Node: ExException270365
+Node: ExTime270823
+Node: ExIncBackup271281
+Node: ExRestore275307
+Node: ExRecovery276253
+Node: Files276825
+Node: Environ278159
+Node: Seealso278907
+Node: Bugreport279624
+Node: Legal280215
+Node: CommandIdx281227
+Node: ConceptIdx298843
 
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