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Network Working Group                                           J. WhiteRequest for Comments: 409                                        SRI-ARCNIC: 12401                                               8 December 1972Related RFCs: 122, 399          TENEX Interface To UCSB's Simple-Minded File SystemI.  PREFACE   A subsystem for TENEX called SMFS has been written to interface   ARPANET TENEX users to the Simple-Minded File System at UCSB-MOD75   (see NIC 5834 /RFC 122 and NIC 11917 /RFC 399).  The Simple-Minded   File System is a resident server process at UCSB which currently   manages approximately 10K pages of on-line, direct-access storage.   Using the simple command language or the subsystem here described,   the user can transfer files to and from UCSB, and delete and rename   them while they reside at Santa Barbara.  Files stored at UCSB may be   read and/or write protected, and a file archived to UCSB from the   TENEX system can be retrieved from another.   This document is intended to provide users with the information   necessary to use SMFS from a terminal; the reader is assumed familiar   with TENEX.   SMFS is currently installed at SRI-ARC (note in particular that the   ARC EXEC WILL NOT give the user any 'GENERAL SUBSYSTEMS NOT AVAILABLE   FOR NIC USE' flack about invoking SMFS).   Copies of the source file are available upon request from the NIC.   Bug reports and comments upon the code and documentation are   solicited by the author, and may be sent to JEW through the Journal.II.  LIMITATIONS   SMFS can archive at Santa Barbara any file resident in a TENEX file   system except:      (1) Long files (in the strict, TENEX sense), and      (2) Files whose directory name, filename, or extension contains          other than alphameric characters, or whose combined length          exceeds 32 characters (this limitation arises because of          naming restrictions imposed at UCSB).White                                                           [Page 1]

RFC 409       TENEX INTERFACE TO SIMPLE-MINDED FILE SYSTEM December 1972III.  OPERATING INSTRUCTIONS   SMFs is invoked like any other subsystem --- by typing its name   followed by a carriage return (CR).  SMFS responds with the herald   'UCSB Archival System (ver n date)' followed by its prompt character   '#'.  Whenever SMFS types its prompt character, it expects the user   to respond with a command ('?' will generate a list of all valid   commands).   The user selects a command by typing its first letter (here and   throughout the exchange, upper- and lower-case alphabetics are   interchangeable).  SMFS acknowledges a command it recognizes by   typing the remaining characters of the keyword, and rejects those it   doesn't by typing '?'.   If the command requires arguments, SMFS prompts the user for each one   in turn by describing it in parentheses.  If the argument is a   keyword, SMFS will list the set of alternatives (separated by   slashes).  The user selects one by typing its first letter.  Again,   SMFS acknowledges a valid selection by completing it; if the user's   response is in error, SMFS prompts for the parameter a second time.   If the argument is not a keyword (e.g., a filename), the user enters   an appropriate character string terminated by a CR.  Commands with no   predicate are simply confirmed by the user with a CR.   Entering the last argument initiates execution of the command.  In   most cases, successfully executed commands illicit no explicit   response (SMFS simply prompts for the next command).  Unsuccessful   commands illicit a diagnostic.IV.  COMMAND EDITING   Anytime a character string is called for, the following editing   features are available to the user:      control-A     deletes the previous character      control-X     deletes the entire string      Control-R     retypes the string   Anytime a filename (see Section V) is called for, the following   additional editing features are available:      control-W     deletes the current field      control-F     recognizes the current field      ESC           recognizes all remaining fields   Control-O aborts a command during specification or execution (some   commands cannot be aborted once the final CR has been typed).White                                                           [Page 2]

RFC 409       TENEX INTERFACE TO SIMPLE-MINDED FILE SYSTEM December 1972V.  FILE SPECIFICATION   Whenever SMFS solicits a filename from the user, either of the   following is acceptable:      (1) hostname  :  filename          'Hostname' is a standard host name or decimal host address          identifying the host to which the file at UCSB belongs (to          distinguish, for example, the directory <SUBSYS> at SRI-ARC          from the directory <SUBSYS> at USC-ISI).          If unspecified, the host name defaults to that of the TENEX          system from which SMFS is invoked (and in this case the          delimiting ':' must be dropped).          Note that 'hostname' need be specified only in connection with          inter-TENEX file transfers, and CANNOT be specified as part of          the local filename in a MOVE or COPY command.          'Filename' is a standard TENEX filename (subject to the          constraints of Section II).          If no directory is specified, that to which the user is          currently connected is taken as the default.          If name, extension, or version number is left unspecified, it          defaults to the one most recently specified.      (2) ESC (i.e.,  Altmode)          ESC in this context denotes the most recent file          specification, which SMFS will retype for the user.VI.  SYNTAX CONVENTIONS   In the description which follows, the following syntax conventions   are employed:      Characters which must be entered literally by the user are      represented in upper-case (although they may be either in upper-      or lower-case when typed by the user).      Variables (like filenames) which must be entered by the user are      represented by their generic names in lower case (although they      may be either in upper- or lower-case when typed by the user).White                                                           [Page 3]

RFC 409       TENEX INTERFACE TO SIMPLE-MINDED FILE SYSTEM December 1972      The following special symbols represent control characters entered      by the user:         CR  --carriage return or Telnet new-line         SP  --space         ESC --alt mode or escape      Output from the system is distinguished by enclosing it in square      brackets.      Whenever an element in the user-system exchange can take more than      one value, the alternatives are listed vertically in a column.VII.  COMMAND DESCRIPTIONSA. USER NAME AND ACCOUNT      UCSB identifies users of its Simple-Minded File System by:      (1) user name --          a character string of from one to eight alphameric characters          of SP, and      (2) account --          a character string of from one to four alphameric characters          or SP.   SMFS maintains internally a pair of accumulators.  One contains a   user name, the other an account, each either a character string   specified explicitly by the user or an SMFS-supplied default (the   user's TENEX login directory name and 'l', respectively).  Both   accumulators are set initially to their default values.   Note:  If the user's login directory name exceeds eight characters in   length, the user must explicitly supply a user name; no default is   available.   Whenever SMFS interacts with the server process at Santa Barbara on   the user's behalf, it does so with the accounting parameters then in   the accumulators.White                                                           [Page 4]

RFC 409       TENEX INTERFACE TO SIMPLE-MINDED FILE SYSTEM December 1972   The user sets and inspects the user name and account with the USER   NAME and ACCOUNT commands:      U[ser name]      [[currentusername]]  newusername CR                           SP [logindirectoryname]                           CR      A[ccount]      [[currentaccount]]   newaccount CR                           SP [1]                           CR   USER NAME and ACCOUNT display and optionally change the contents of   the user name and account accumulators, respectively:      If 'newusername' or 'newaccount' is specified, it replaces the      current contents of the appropriate accumulator.      If SP is specified, the accumulator is set to the appropriate      default.      If CR is typed, the user name or account is left unchanged.B. COPY   The COPY command effects the transfer of a copy of a file to or from   UCSB.  The file which is the source of the copy remains unmodified;   the user must have read access to it.  The syntax of the command is   one of the following, depending upon the direction of transfer:      C[opy]      [(to/from UCSB] T[o]      [(file)] localfilespec CR      [(store as file)] remotefilespec CR      [(create/replace)] C[reate]                         R(eplace]      C[opy]      [to/from UCSB] F[rom]      [(file)] remotefilespec CR      [(store as file)] localfilespec CR      where 'localfilespec' and 'remotefilespec' are as defined in      Section V.White                                                           [Page 5]

RFC 409       TENEX INTERFACE TO SIMPLE-MINDED FILE SYSTEM December 1972   Note that a file can effectively be renamed in transit between TENEX   and UCSB by specifying 'localfilespec' different from   'remotefilespec'.  The more common  situation is that in which the   second of the two filespec's is simply ESC.  In 'localfilespec', the   field-defaulting algorithms of Section V are not applied; the normal   TENEX defaults are applicable.   If in a copy to UCSB the user specifies 'create'; SMFS will ignore   the command (and so inform the user) if a file of the same name   already exists at UCSB.  If 'replace' is specified, the command will   be ignored if a file of the same name DOESN'T  already exist at UCSB.   Also, if 'replace' is specified, the user must have write access to   the existing file at UCSB.C. MOVE   The MOVE command functions like COPY except that the source file for   the operation is deleted once it has been transferred successfully.   The user must have both read and write access to the source file.D. LOCATE   The LOCATE command verifies the existence of a file at UCSB.  Its   syntax is      L[ocate (file)] filespec CR        [Archived at UCSB]        [Not Archived at UCSB]   Neither read nor write access to the designated file is required.   Note:  LOCATE is the nearest thing to a TENEX DIRECTORY command   available.  A full DIRECTORY command cannot currently be implemented   because of restrictions imposed at UCSB.E. DELETE   The DELETE command deletes and releases all secondary storage   assigned to a file previously copied or moved to UCSB:      D[elete (file)] filespec CR   The user must have write access to the file at UCSB.White                                                           [Page 6]

RFC 409       TENEX INTERFACE TO SIMPLE-MINDED FILE SYSTEM December 1972F. RENAME   The RENAME command changes the name of a file residing at UCSB as the   result of a previous move or copy operation:      R[ename (file)] filespec CR      [(new file)] newfilespec CR   The user must have write access to the file at UCSB, and no file may   already exist there with the name 'newfilespec'.G. PASSWORD   While files reside at UCSB, they may be protected from unauthorized   access or modification by the assignment of a read and/or write   password, respectively.  Each is a character string of from one to 36   alphameric characters or SP.   SMFS maintains internally a pair of accumulators.  One is always   either empty or containing a read password, the other empty or   containing a write password (both accumulators are initially empty).   Whenever a command issued by the user requires (always implicitly) a   password(s), the one then contained in the appropriate accumulator is   applied.  An empty accumulator implies 'no password'.   The user sets and inspects the two passwords with the PASSWORD   command:      P[assword]      [(read/write)] R[ead]                     W[rite]      [[currentpassword]] newpassword CR                           SP [none]                           CR   PASSWORD displays and optionally changes the contents of one of the   two password accumulators:      If 'new password' is specified, it replaces the current contents      of the accumulator.      If SP is specified, the accumulator is made empty.      If CR is typed, the password is left unchanged.White                                                           [Page 7]

RFC 409       TENEX INTERFACE TO SIMPLE-MINDED FILE SYSTEM December 1972H. NEWS   The NEWS command prints at the user's terminal the contents of the   file:      SRI-ARC: <SYSTEM >SMFS.NEWS1   residing at UCSB.  SRI-ARC maintains this file, and as necessary   places in it information (e.g., command syntax changes) of concern to   users of UCSB's archiving service.  Should the user, for example,   have difficulty with any of the commands described in this document,   NEWS is a good starting point for obtaining help.   The command has the syntax:      N[ews] CR   If the news file is long, SMFS will periodically pause and type   'Continue?'.  The user may then respond 'N' to halt printout, or 'Y'   or CR to continue (of course, control-O will abort printout at any   time).I. QUIT   The QUIT command causes SMFS to return to the EXEC:      Q[uit] CR        [This RFC was put into machine readable form for entry]    [into the online RFC archives by Helene Morin, Via Genie 12/99]White                                                           [Page 8]