rfc412.txt

RFC 的详细文档！

Work Information Center # 12404                                 G. Hicks
Request for Comments # 412                                      Utah
                                                               27-Nov-72



                         User FTP Documentation

     The attached document is the HELP file for the Utah-10
implementation of the User FTP Process. This is what the user has
typed on his console when he types 'HELP<cr>', and as such is the only
documention produced to date.







































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User FTP Documentation                          Detailed Command Listing


                         FTP User Documentation
                           November 27, 1972


I. Control Characters

      There are several control characters that have meaning to the FTP
Process. First, the abort character is <control-z> (SUB), next for
editing, only <control-r>, <control-a>, <control-h>, <control-v>,
<control-w>, <alt-mode>, <eol>, <space>, <control-x> and <rub-out> have
any meaning, <control-a> (SOH) and <control-h> (BS) are the character
delete keys. <control-w> is the word delete character, Note: When dowing
the ' funktion, this character will delete the entire line typed.
<control-v> says take the next character literally. <alt-mode> (ESC)
terminates the command giving helpful noise words, <eol> and <space> are
terminators also. These last two will give no command completion or
noise words. All three echo as a space however.  <control-x> (CAN) and
<rub-out> (DEL) are the command abort characters. <control-r> (DC2) will
retype the line as the command interpreter sees it. When using the ?  as
a prompter, for initial commands, it will type-out all commands that
begin with that particular character string.  If it is typed in a sub-
command field, it will type out the prompt message only if it is the
first character typed. At all other times, it will be accepted as part
of the typed string.


II. General Information

      The FTP user process is designed to make transferring files from
one host on the ARPANET to another much easier than it has been up until
now. To this end, the command language was designed to be as natural as
possible.

      The command interpreter is, of course, part of this idea.
Therefore, to help the user as much as possible, there are several ways
to find out what is expected in the form of commands, file-names, user-
names, etc. When the user has typed nothing, typing a ? will cause the
interpreter to type out all the commands that are available to the user.
If the user has typed anything at all, then it will respond with all
commands that begin with the particular character string.

      So that the command language was as easy to learn as possible, the
command interpreter will 'see' nothing that is not part of a legal
command. If the user types anything that is not expected, the character
is not echoed and a bell is echoed instead.






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User FTP Documentation                          Detailed Command Listing


III. Brief Command Listing

      The commands that are expected and their syntax are listed below.
NOTE: UPPER and lower case letters are identical.


<host-name>
D<decimal host number>
<octal host number>
;<any string> (useful for comments to a person that is
linked to you)
MODE <mode name>
RETREIVE <remote file> (to) <local file>
GET <remote file> (to) <local file>
SEND <local file> (to) <remote file>
STORE <local file> (to) <remote file>
APPEND <local file> (to) <remote file>
RENAME <remote file> (to be) <new remote file name>
DELETE <remote file>
BYE
COPY <direction descriptor> <file group> (to) <file group>
     (see detailed description below)
LOGOUT
DDT
LIST <file group> (to file) <local file name>
SOCKET (NOT IMPLEMENTED YET)
ALLOCATE <decimal number of bytes>
QUIT
   foreign host)
HOST <any valid ARPANET host name or number>
USER <remote user name>
PASSWORD <password for remote user's name>
ACCOUNT <string or number for remote user's name>
STATUS (see description of status command below)
LOGIN <user name> <password> <optional account> <to host>
BYTE <decimal byte size>
TYPE <type descriptor>
STRUCTURE <structure descriptor>
TENEX
ASCII
VERBOSE










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User FTP Documentation                          Detailed Command Listing


IV. Detailed Description of the Commands

         The commands and their syntax are described in greater detail
   blow. The words in parenthesis are noise words.  NOTE: upper and
   lower case are identical. Unless otherwise noted in the command
   description, all commands described are implemented.

<host name> or <host number>
   Performs the ICP to the indicated host with explanatory remarks if
   the ICP is not possible.

MODE <mode descriptor>
   Sets the mode of the data transfer connection according to the
   following sub-commandos:

   STREAM: bit stream, end of file is indicated by the data connection
   closing.

   BLOCK: formats (or expects formatted) data into blocks.

   TEXT: Sends or retreives text. Forces TYPE ASCII and BYTE 8. This
   command sends the appropiate commands to the foreign host, then sends
   the data using the TELNET codes for EOR and EOF as per the FTP
   Protocol.

   HASP: compress data.

   NOTE: Of the above sub-commands, only MODE STREAM and MODE TEXT are
   implemented at present.

RETREIVE (file) <remote file> (to file) <local file name>
   Sends the retr command to the remote server, sets up the data
   connection according to any previous MODE, TYPE, BYTE commands. Puts
   the data coming on the the data connection into the local file
   specified.

GET (file) <remote file name> (to file) <local file name>
   See description of RETREIVE.

STORE (local file) <file name> (onto file) <remote file>
   Accepts a local file name, does the formatting according to any
   previous BYTE, TYPE, MODE commands and sends it to the foreign host.

SEND (local file) <file name> (onto file) <remote file>
   See description of STORE.

APPEND (local file) <file name> (to remote file) <remote file>
   Does the same as a store except that the file is appended to the



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User FTP Documentation                          Detailed Command Listing


   remote file rather that just writing over the file.

RENAME (existing file) <file name> (to be) <new file name>
   Accepts the name of n old remote file and asks for a new file name,
   sends the appropiate commands and names to the foreign host causing
   the old file name to be replaced by the new file name.

DELETE (file) <file name>
   This command causes the remote file to be marked for deletion. It
   does require that the command be confirmed twice.

BYE
   Takes no arguments. Causes the server to terminate the current
   session with the user. The program will return to the EXEC MODE when
   the command has been acknowledged by the remote server.

COPY
   This command does a variety of things. First. it allows the user do
   describe a file group. EG: *.mac, *.sav, etc.  The *'s may be for
   foreign files or local files according to the following sub-commands:

  REMOTE (remote file group) <remote file grouping>:
   Causes the user FTP to ask the server for the file in <remote file
   grouping>. Then asks the user to specify where each file is to go. A
   typical sequence might look like the following:

   !copy remote (remote file group) ftp.*
   Please be patient. Getting remote file names.
   Got them.
   !copy (file) <HICKS>FTP.MAC;| (to file) ftp.mac [New file]
   [Messages and etc. follow with the above line being
   repeated for each file in the remote file group.]

  LOCAL (local file grouping) <local file group>:
   Causes the user FTP to accept the file group specified, and send the
   file names to the server leaving off the <directory name> and version
   number of the local file. The user may not specify *'d devices of *'d
   directorys. A line for this might look like the following:
   !copy local (local file group) ftp.*;*
    [Confirm]

   Next, if the user does not specify any *'s for either the remote file
   or the local file, this command is exactly like the RETREIVE or STORE
   command described earlier.
LOGOUT
   Takes no arguments. See description of BYE command for more details.





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