BSD 4_4 release

[unix-history] / usr / src / libexec / tftpd / tftpd.8

diff --git a/usr/src/libexec/tftpd/tftpd.8 b/usr/src/libexec/tftpd/tftpd.8
index 4a2f22b..430c1c4 100644 (file)
--- a/usr/src/libexec/tftpd/tftpd.8
+++ b/usr/src/libexec/tftpd/tftpd.8
@@ -1,55 +1,106 @@
-.\" Copyright (c) 1983 Regents of the University of California.
-.\" All rights reserved.  The Berkeley software License Agreement
-.\" specifies the terms and conditions for redistribution.
+.\" Copyright (c) 1983, 1991, 1993
+.\"    The Regents of the University of California.  All rights reserved.

 .\"
 .\"

-.\"    @(#)tftpd.8     6.1 (Berkeley) %G%
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"    This product includes software developed by the University of
+.\"    California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.

 .\"
 .\"

-.TH TFTPD 8C ""
-.UC 5
-.SH NAME
-tftpd \- DARPA Trivial File Transfer Protocol server
-.SH SYNOPSIS
-.B /etc/tftpd
-[
-.B \-d
-] [
-.I port
-]
-.SH DESCRIPTION
-.I Tftpd
-is a server which supports the DARPA Trivial File Transfer
-Protocol.  The TFTP server operates
-at the port indicated in the ``tftp'' service description;
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"    @(#)tftpd.8     8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt TFTPD 8
+.Os BSD 4.2
+.Sh NAME
+.Nm tftpd
+.Nd
+Internet Trivial File Transfer Protocol server
+.Sh SYNOPSIS
+.Nm tftpd
+.Op Fl l
+.Op Fl n
+.Op Ar directory ...
+.Sh DESCRIPTION
+.Nm Tftpd
+is a server which supports the
+Internet Trivial File Transfer
+Protocol (\c
+.Tn RFC 783).
+The
+.Tn TFTP
+server operates
+at the port indicated in the
+.Ql tftp
+service description;

 see
 see

-.IR services (5).
-This port number may be overridden (for debugging purposes)
-by specifying a port number on the command line.  If the
-.B \-d
-option is specified, each socket created by
-.I tftpd
-will have debugging enabled (see SO_DEBUG in
-.IR socket (2)).
-.PP
+.Xr services 5 .
+The server is normally started by
+.Xr inetd 8 .
+.Pp

 The use of
 The use of

-.I tftp
+.Xr tftp 1

 does not require an account or password on the remote system.
 Due to the lack of authentication information, 
 does not require an account or password on the remote system.
 Due to the lack of authentication information, 

-.I tftpd
+.Nm tftpd

 will allow only publicly readable files to be
 accessed.
 will allow only publicly readable files to be
 accessed.

-Note that this extends the concept of ``public'' to include
+Files containing the string ``/\|\fB.\|.\fP\|/'' are not allowed.
+Files may be written only if they already exist and are publicly writable.
+Note that this extends the concept of
+.Dq public
+to include

 all users on all hosts that can be reached through the network;
 this may not be appropriate on all systems, and its implications
 should be considered before enabling tftp service.
 all users on all hosts that can be reached through the network;
 this may not be appropriate on all systems, and its implications
 should be considered before enabling tftp service.

-.SH "SEE ALSO"
-tftp(1C)
-.SH BUGS
-This server is known only to be self consistent
-(i.e. it operates with the user TFTP program,
-.IR tftp (1C)).
-Due to the unreliability of the transport protocol
-(UDP) and the scarcity of TFTP implementations,
-it is uncertain whether it really works.
-.PP
-The search permissions of the directories leading to the files accessed
-are not checked.
+The server should have the user ID with the lowest possible privilege.
+.Pp
+Access to files may be restricted by invoking
+.Nm tftpd
+with a list of directories by including up to 20 pathnames
+as server program arguments in
+.Pa /etc/inetd.conf .
+In this case access is restricted to files whose
+names are prefixed by the one of the given directories.
+The given directories are also treated as a search path for 
+relative filename requests.
+.Pp
+The options are:
+.Bl -tag -width Ds
+.It Fl l
+Logs all requests using
+.Xr syslog 3 .
+.It Fl n
+Suppresses negative acknowledgement of requests for nonexistent
+relative filenames.
+.El
+.Sh SEE ALSO
+.Xr tftp 1 ,
+.Xr inetd 8
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.2 .