Return to rlogind.8 CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / man / man8

Annotation of 43BSDTahoe/man/man8/rlogind.8, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1983 Regents of the University of California.
                      2: .\" All rights reserved.  The Berkeley software License Agreement
                      3: .\" specifies the terms and conditions for redistribution.
                      4: .\"
                      5: .\"    @(#)rlogind.8c  6.3 (Berkeley) 5/24/86
                      6: .\"
                      7: .TH RLOGIND 8C "May 24, 1986"
                      8: .UC 5
                      9: .SH NAME
                     10: rlogind \- remote login server
                     11: .SH SYNOPSIS
                     12: .B /etc/rlogind
                     13: [
                     14: .B \-d
                     15: ]
                     16: .SH DESCRIPTION
                     17: .I Rlogind
                     18: is the server for the 
                     19: .IR rlogin (1C)
                     20: program.  The server provides a remote login facility
                     21: with authentication based on privileged port numbers from trusted hosts.
                     22: .PP
                     23: .I Rlogind
                     24: listens for service requests at the port indicated in
                     25: the ``login'' service specification; see
                     26: .IR services (5).
                     27: When a service request is received the following protocol
                     28: is initiated:
                     29: .IP 1)
                     30: The server checks the client's source port.
                     31: If the port is not in the range 0-1023, the server
                     32: aborts the connection.
                     33: .IP 2)
                     34: The server checks the client's source address
                     35: and requests the corresponding host name (see
                     36: .IR gethostbyaddr (3N),
                     37: .IR hosts (5)
                     38: and
                     39: .IR named (8)).
                     40: If the hostname cannot be determined,
                     41: the dot-notation representation of the host address is used.
                     42: .PP
                     43: Once the source port and address have been checked, 
                     44: .I rlogind
                     45: allocates a pseudo terminal (see 
                     46: .IR pty (4)),
                     47: and manipulates file descriptors so that the slave
                     48: half of the pseudo terminal becomes the 
                     49: .B stdin ,
                     50: .B stdout ,
                     51: and
                     52: .B stderr 
                     53: for a login process.
                     54: The login process is an instance of the
                     55: .IR login (1)
                     56: program, invoked with the
                     57: .B \-r
                     58: option.  The login process then proceeds with the authentication
                     59: process as described in
                     60: .IR rshd (8C),
                     61: but if automatic authentication fails, it reprompts the user
                     62: to login as one finds on a standard terminal line.
                     63: .PP
                     64: The parent of the login process manipulates the master side of
                     65: the pseduo terminal, operating as an intermediary
                     66: between the login process and the client instance of the
                     67: .I rlogin
                     68: program.  In normal operation, the packet protocol described
                     69: in
                     70: .IR pty (4)
                     71: is invoked to provide ^S/^Q type facilities and propagate
                     72: interrupt signals to the remote programs.  The login process
                     73: propagates the client terminal's baud rate and terminal type,
                     74: as found in the environment variable, ``TERM''; see
                     75: .IR environ (7).
                     76: The screen or window size of the terminal is requested from the client,
                     77: and window size changes from the client are propagated to the pseudo terminal.
                     78: .SH DIAGNOSTICS
                     79: All diagnostic messages are returned on the connection
                     80: associated with the
                     81: .BR stderr ,
                     82: after which any network connections are closed.
                     83: An error is indicated by a leading byte with a value of 1.
                     84: .PP
                     85: .B ``Try again.''
                     86: .br
                     87: A
                     88: .I fork
                     89: by the server failed.
                     90: .PP
                     91: .B ``/bin/sh: ...''
                     92: .br
                     93: The user's login shell could not be started.
                     94: .SH BUGS
                     95: The authentication procedure used here assumes the integrity
                     96: of each client machine and the connecting medium.  This is
                     97: insecure, but is useful in an ``open'' environment.
                     98: .PP
                     99: A facility to allow all data exchanges to be encrypted should be
                    100: present.
                    101: .PP
                    102: A more extensible protocol should be used.

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.