rfc122.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

        8         8*LENGTH
     _______________//______
    |        |              |
    | LENGTH | FILENAME     |
    |________|______//______|

   where the 'LENGTH' subfield contains the length in 8-bit characters
   of the 'FILENAME' subfield.




J. White                                                       [Page 16]

RFC 122                Simple-Minded file System              April 1971


   This is the general format for SMFS command responses.  For responses
   to particular commands, not all fields may be present.  A particular
   subset of these fields is defined for each type of command response;
   no other fields will appear.  The defined fields for each command
   response type are indicated in Figure 5.

   The fields 'OP CODE' and 'FILENAME' are the op code and filename
   extracted by SMFS from the input stream and are echoed by SMFS in the
   output stream.  The filename is always echoed explicitly, even if it
   appeared implicitly in the input stream. 'OP CODE' and 'FILENAME' are
   suppressed and hence do not appear in the command response it Bit 4
   of the 'FLAGS' field of the corresponding command is set to 0.

   'CMPL CODE' contains an indication of the outcome of the operation.
   If the operation was completed successfully, 'CMPL CODE' contains a
   value equal to the op code of the command executed.  Hence, if
   echoing of 'OP CODE' and 'FILENAME' is not suppressed, the operation
   was successful if and only if 'OP CODE' and 'CMPL CODE' are
   identical.  If the operation as unsuccessful, 'CMPL CODE' contains an
   indication of the error encountered by SMFS in processing the
   command.  Completion codes are summarized in Figure 6.






























J. White                                                       [Page 17]

RFC 122                Simple-Minded file System              April 1971


                              C
                              O
                              M
                              P
                              L
                              E
                    F         T         B
                    I         I         I
          O         L         O         T
          P         E         N
                                        C
          C         N         C         O         D
          O         A         O         U         A
          D         M         D         N         T
          E         E         E         T         A
   _____________________________________________________

   NOP
   _____________________________________________________

   FNO
   _____________________________________________________

   ALF    X         X         X
   _____________________________________________________

   UDF    X         X         X
   _____________________________________________________

   RPF    X         X         X
   _____________________________________________________

   RTF    X         X         X         X         X
   _____________________________________________________

   SPF    X         X         X         X
   _____________________________________________________

   DLF    X         X         X
   _____________________________________________________

   RNF    X         X         X
    _____________________________________________________

                        Figure 5
             Defined Command Response Fields

   Note: Command response fields marked with an 'X' are defined.



J. White                                                       [Page 18]

RFC 122                Simple-Minded file System              April 1971


   An invalid op code in the input stream constitutes a special type of
   error.  SMFS's response is as follows.  A special command response is
   constructed.  It consists of the value X'FF' in an eight-bit field,
   followed by the erroneous op code, also in an eight-bit field.  The
   command response is placed in the output stream and connections to
   the user are closed.


      2  ALLOCATION SUCCESSFUL   The file was successfully allocated.

      3  UPDATE SUCCESSFUL       The file was successfully updated.

      4  REPLACE SUCCESSFUL      The file was successfully replaced.

      5  RETRIEVE SUCCESSFUL     The file segment was successfully
                                 retrieved.

      6  SPACE SUCCESSFUL        The file segment was successfully
                                 flushed.

      7  DELETION SUCCESSFUL     The file was successfully deleted.

      8  RENAME SUCCESSFUL       The file was successfully renamed.

     20  NO DEFAULT FILENAME     The user attempted to default the
                                 filename (or new filename), and the
                                 filename accumulator was empty.

     21  ZERO-LENGTH FILENAME    The length of the filename (or new
                                 filename) was specified as zero.

     22  FILENAME TOO LONG       The length of the filename (or new
                                 filename) exceeded 36 characters.

     23  INVALID FILENAME        The filename (or new filename)
                                 contained character(s) that do not
                                 appear in the character set.

     24  NO DEFAULT PASSWORD     The user attempted to default either
                                 the access or modification password,
                                 and the password accumulator was empty.

     25  ZERO-LENGTH PASSWORD    The length of either the access of
                                 modification password was specified as
                                 zero.

                                Figure 6
                            Completion Codes



J. White                                                       [Page 19]

RFC 122                Simple-Minded file System              April 1971


     26  PASSWORD TOO LONG       The length of either the access or
                                 modification password exceeded 36
                                 characters.

     27  NO DEFAULT BIT COUNT    The user attempted to default the bit
                                 count, and the bit-count accumulator
                                 was empty.

     28  INVALID PASSWORD        Either the access or modification
                                 password contained character(s) that do
                                 not appear in the character set.

     29  DUPLICATE FILENAME      Either the filename (in an ALF
                                 operation) or new filename (in a RNF
                                 operation) is already assigned to
                                 another file.

     30  INSUFFICIENT SPACE      (In an ALF operation) The requested
                                 amount of secondary storage is
                                 unavailable.

     31  ALLOCATION I/O ERROR    (In an ALF operation) An irrecoverable
                                 I/O error was encountered by SMFS while
                                 attempting to allocate the file.

     32  FILE NOT FOUND          The referenced file does not exist.

     33  SEARCH I/O ERROR        An irrecoverable I/O error was
                                 encountered by SMFS while attempting to
                                 locate the referenced file.

     34  FILE FULL               (In a UDF/RPF operation) The secondary
                                 storage allocated to the file has been
                                 exhausted.

     35  INCORRECT PASSWORD      The access or modification password
                                 supplied by the user does not match
                                 that declared when the file was
                                 allocated.

     36  FILE SIZE TOO SMALL     (In an ALF operation) The bit count
                                 specified is less than the minimum file
                                 size accepted by SMFS.

                          Figure 6 (continued)
                            Completion Codes





J. White                                                       [Page 20]

RFC 122                Simple-Minded file System              April 1971


     37  FILE SIZE TOO BIG       (In an ALF operation) The bit count
                                 specified exceeded the maximum file
                                 size accepted by SMFS.

     38  WRITE I/O ERROR         An irrecoverable I/O error as
                                 encountered by SMFS. (In an ALF
                                 operation) SMFS was attempting to
                                 record password information, or (in a
                                 UDF/RPF operation) SMFS as attempting
                                 to add data to the file.

     39  READ I/O ERROR          An irrecoverable I/O error was
                                 encountered by SMFS attempting to
                                 retrieve either password information or
                                 data.

     40  RENAME I/O ERROR        An irrecoverable I/O error was
                                 encountered by SMFS while attempting to
                                 rename the file.

     41  DELETE I/O ERROR        (In a DLF operation) An irrecoverable
                                 I/O error was encountered by SMFS while
                                 attempting to delete the file.

     42  END-OF-DATA             (In a RTF/SPR operation) The end of the
                                 file was reached before the requested
                                 segment had been transmitted/flushed.

                           Figure 6 (continued)
                             Completion Codes




         [ This RFC was put into machine readable form for entry ]
          [ into the online RFC archives by Gottfried Janik 2/98 ]















J. White                                                       [Page 21]