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Extensions to FTP
RFC 3659

Document type: RFC - Proposed Standard (March 2007; Errata)
Updates RFC 959
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 3659 (Proposed Standard)
Responsible AD: Ted Hardie
Send notices to: <phethmon@hethmon.com>

Network Working Group                                         P. Hethmon
Request for Comments: 3659                              Hethmon Software
Updates: 959                                                  March 2007
Category: Standards Track

                           Extensions to FTP

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The IETF Trust (2007).

Abstract

   This document specifies new FTP commands to obtain listings of remote
   directories in a defined format, and to permit restarts of
   interrupted data transfers in STREAM mode.  It allows character sets
   other than US-ASCII, and also defines an optional virtual file
   storage structure.

Hethmon                     Standards Track                     [Page 1]
RFC 3659                   Extensions to FTP                  March 2007

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Document Conventions . . . . . . . . . . . . . . . . . . . . .  3
       2.1.  Basic Tokens . . . . . . . . . . . . . . . . . . . . . .  4
       2.2.  Pathnames. . . . . . . . . . . . . . . . . . . . . . . .  4
       2.3.  Times. . . . . . . . . . . . . . . . . . . . . . . . . .  6
       2.4.  Server Replies . . . . . . . . . . . . . . . . . . . . .  7
       2.5.  Interpreting Examples. . . . . . . . . . . . . . . . . .  8
   3.  File Modification Time (MDTM). . . . . . . . . . . . . . . . .  8
       3.1.  Syntax . . . . . . . . . . . . . . . . . . . . . . . . .  9
       3.2.  Error Responses. . . . . . . . . . . . . . . . . . . . .  9
       3.3.  FEAT Response for MDTM . . . . . . . . . . . . . . . . . 10
       3.4.  MDTM Examples. . . . . . . . . . . . . . . . . . . . . . 10
   4.  File SIZE. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
       4.1.  Syntax . . . . . . . . . . . . . . . . . . . . . . . . . 11
       4.2.  Error Responses. . . . . . . . . . . . . . . . . . . . . 12
       4.3.  FEAT Response for SIZE . . . . . . . . . . . . . . . . . 12
       4.4.  Size Examples. . . . . . . . . . . . . . . . . . . . . . 12
   5.  Restart of Interrupted Transfer (REST) . . . . . . . . . . . . 13
       5.1.  Restarting in STREAM Mode. . . . . . . . . . . . . . . . 14
       5.2.  Error Recovery and Restart . . . . . . . . . . . . . . . 14
       5.3.  Syntax . . . . . . . . . . . . . . . . . . . . . . . . . 15
       5.4.  FEAT Response for REST . . . . . . . . . . . . . . . . . 16
       5.5.  REST Example . . . . . . . . . . . . . . . . . . . . . . 17
   6.  A Trivial Virtual File Store (TVFS). . . . . . . . . . . . . . 17
       6.1.  TVFS File Names. . . . . . . . . . . . . . . . . . . . . 18
       6.2.  TVFS Pathnames . . . . . . . . . . . . . . . . . . . . . 18
       6.3.  FEAT Response for TVFS . . . . . . . . . . . . . . . . . 20
       6.4.  OPTS for TVFS. . . . . . . . . . . . . . . . . . . . . . 21
       6.5.  TVFS Examples. . . . . . . . . . . . . . . . . . . . . . 21
   7.  Listings for Machine Processing (MLST and MLSD). . . . . . . . 23
       7.1.  Format of MLSx Requests. . . . . . . . . . . . . . . . . 23
       7.2.  Format of MLSx Response. . . . . . . . . . . . . . . . . 24
       7.3.  File Name Encoding . . . . . . . . . . . . . . . . . . . 26
       7.4.  Format of Facts. . . . . . . . . . . . . . . . . . . . . 28
       7.5.  Standard Facts . . . . . . . . . . . . . . . . . . . . . 28
       7.6.  System Dependent and Local Facts . . . . . . . . . . . . 36
       7.7.  MLSx Examples. . . . . . . . . . . . . . . . . . . . . . 37
       7.8.  FEAT Response for MLSx . . . . . . . . . . . . . . . . . 49
       7.9.  OPTS Parameters for MLST . . . . . . . . . . . . . . . . 51
   8.  Impact on Other FTP Commands . . . . . . . . . . . . . . . . . 54
   9.  Character Sets and Internationalization. . . . . . . . . . . . 55
   10. IANA Considerations. . . . . . . . . . . . . . . . . . . . . . 55
       10.1. The OS Specific Fact Registry. . . . . . . . . . . . . . 56
       10.2. The OS Specific Filetype Registry. . . . . . . . . . . . 56

Hethmon                     Standards Track                     [Page 2]
RFC 3659                   Extensions to FTP                  March 2007

   11. Security Considerations. . . . . . . . . . . . . . . . . . . . 57
   12. Normative References . . . . . . . . . . . . . . . . . . . . . 58
   Acknowledgments. . . . . . . . . . . . . . . . . . . . . . . . . . 59

1.  Introduction

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