[unix-history] / usr / man / man8 / telnetd.8c

.TH TELNETD 8C "4 March 1983"
.UC 4
.SH NAME
telnetd \- DARPA TELNET protocol server
.SH SYNOPSIS
.B /etc/telnetd
[
.B \-d
] [
.I port
]
.SH DESCRIPTION
.I Telnetd
is a server which supports the DARPA standard TELNET
virtual terminal protocol.  The TELNET server operates
at the port indicated in the ``telnet'' service description;
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 telnetd
will have debugging enabled (see SO_DEBUG in
.IR socket (2)).
.PP
.I Telnetd
operates by allocating a pseudo-terminal device (see
.IR pty (4))
for a client, then creating a login process which has
the slave side of the pseudo-terminal as 
.BR stdin ,
.BR stdout ,
and
.BR stderr .
.I Telnetd
manipulates the master side of the pseudo terminal,
implementing the TELNET protocol and passing characters
between the client and login process.
.PP
When a TELNET session is started up, 
.I telnetd
sends a TELNET option to the client side indicating
a willingness to do ``remote echo'' of characters.
The pseudo terminal allocated to the client is configured
to operate in ``cooked'' mode, and with XTABS and CRMOD
enabled (see
.IR tty (4)).
Aside from this initial setup, the only mode changes
.I telnetd
will carry out are those required for echoing characters
at the client side of the connection.
.PP
.I Telnetd
supports binary mode, and most of the common TELNET options,
but does not, for instance, support timing marks.  Consult
the source code for an exact list of which options are not
implemented.
.SH "SEE ALSO"
telnet(1C)
.SH BUGS
A complete list of the options supported should be given here.
Commit	Line	Data
f87c5f8e C	1	.TH TELNETD 8C "4 March 1983"
	2	.UC 4
	3	.SH NAME
	4	telnetd \- DARPA TELNET protocol server
	5	.SH SYNOPSIS
	6	.B /etc/telnetd
	7	[
	8	.B \-d
	9	] [
	10	.I port
	11	]
	12	.SH DESCRIPTION
	13	.I Telnetd
	14	is a server which supports the DARPA standard TELNET
	15	virtual terminal protocol. The TELNET server operates
	16	at the port indicated in the ``telnet'' service description;
	17	see
	18	.IR services (5).
	19	This port number may be overridden (for debugging purposes)
	20	by specifying a port number on the command line. If the
	21	.B \-d
	22	option is specified, each socket created by
	23	.I telnetd
	24	will have debugging enabled (see SO_DEBUG in
	25	.IR socket (2)).
	26	.PP
	27	.I Telnetd
	28	operates by allocating a pseudo-terminal device (see
	29	.IR pty (4))
	30	for a client, then creating a login process which has
	31	the slave side of the pseudo-terminal as
	32	.BR stdin ,
	33	.BR stdout ,
	34	and
	35	.BR stderr .
	36	.I Telnetd
	37	manipulates the master side of the pseudo terminal,
	38	implementing the TELNET protocol and passing characters
	39	between the client and login process.
	40	.PP
	41	When a TELNET session is started up,
	42	.I telnetd
	43	sends a TELNET option to the client side indicating
	44	a willingness to do ``remote echo'' of characters.
	45	The pseudo terminal allocated to the client is configured
	46	to operate in ``cooked'' mode, and with XTABS and CRMOD
	47	enabled (see
	48	.IR tty (4)).
	49	Aside from this initial setup, the only mode changes
	50	.I telnetd
	51	will carry out are those required for echoing characters
	52	at the client side of the connection.
	53	.PP
	54	.I Telnetd
	55	supports binary mode, and most of the common TELNET options,
	56	but does not, for instance, support timing marks. Consult
	57	the source code for an exact list of which options are not
	58	implemented.
	59	.SH "SEE ALSO"
	60	telnet(1C)
	61	.SH BUGS
	62	A complete list of the options supported should be given here.