Return to login.1 CVS log

Up to [local] / src / usr.bin / login

Annotation of src/usr.bin/login/login.1, Revision 1.1.1.1

1.1       deraadt     1: .\"    $NetBSD: login.1,v 1.7 1995/08/31 22:52:33 jtc Exp $
                      2: .\"
                      3: .\" Copyright (c) 1980, 1990, 1993
                      4: .\"    The Regents of the University of California.  All rights reserved.
                      5: .\"
                      6: .\" Redistribution and use in source and binary forms, with or without
                      7: .\" modification, are permitted provided that the following conditions
                      8: .\" are met:
                      9: .\" 1. Redistributions of source code must retain the above copyright
                     10: .\"    notice, this list of conditions and the following disclaimer.
                     11: .\" 2. Redistributions in binary form must reproduce the above copyright
                     12: .\"    notice, this list of conditions and the following disclaimer in the
                     13: .\"    documentation and/or other materials provided with the distribution.
                     14: .\" 3. All advertising materials mentioning features or use of this software
                     15: .\"    must display the following acknowledgement:
                     16: .\"    This product includes software developed by the University of
                     17: .\"    California, Berkeley and its contributors.
                     18: .\" 4. Neither the name of the University nor the names of its contributors
                     19: .\"    may be used to endorse or promote products derived from this software
                     20: .\"    without specific prior written permission.
                     21: .\"
                     22: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     23: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     24: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     25: .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     26: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     27: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     28: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     29: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     30: .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     31: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     32: .\" SUCH DAMAGE.
                     33: .\"
                     34: .\"    @(#)login.1     8.2 (Berkeley) 5/5/94
                     35: .\"
                     36: .Dd May 5, 1994
                     37: .Dt LOGIN 1
                     38: .Os BSD 4
                     39: .Sh NAME
                     40: .Nm login
                     41: .Nd log into the computer
                     42: .Sh SYNOPSIS
                     43: .Nm login
                     44: .Op Fl fp
                     45: .Op Fl h Ar hostname
                     46: .Op Ar user
                     47: .Sh DESCRIPTION
                     48: The
                     49: .Nm login
                     50: utility logs users (and pseudo-users) into the computer system.
                     51: .Pp
                     52: If no user is specified, or if a user is specified and authentication
                     53: of the user fails,
                     54: .Nm login
                     55: prompts for a user name.
                     56: Authentication of users is done via passwords.
                     57: Alternately, the user can enter the password "s/key", in which case
                     58: S/Key authentication of users is performed, as descibed in
                     59: .Xr skey 1 .
                     60: S/Key is a Trademark of Bellcore.
                     61: .Pp
                     62: The options are as follows:
                     63: .Bl -tag -width Ds
                     64: .It Fl f
                     65: The
                     66: .Fl f
                     67: option is used when a user name is specified to indicate that proper
                     68: authentication has already been done and that no password need be
                     69: requested.
                     70: This option may only be used by the super-user or when an already
                     71: logged in user is logging in as themselves.
                     72: .It Fl h
                     73: The
                     74: .Fl h
                     75: option specifies the host from which the connection was received.
                     76: It is used by various daemons such as
                     77: .Xr telnetd  8 .
                     78: This option may only be used by the super-user.
                     79: .It Fl p
                     80: By default,
                     81: .Nm login
                     82: discards any previous environment.
                     83: The
                     84: .Fl p
                     85: option disables this behavior.
                     86: .El
                     87: .Pp
                     88: If the file
                     89: .Pa /etc/nologin
                     90: exists,
                     91: .Nm login
                     92: displays its contents to the user and exits.
                     93: This is used by
                     94: .Xr shutdown  8
                     95: to prevent users from logging in when the system is about to go down.
                     96: .Pp
                     97: Immediately after logging a user in,
                     98: .Nm login
                     99: displays the system copyright notice, the date and time the user last
                    100: logged in, the message of the day as well as other information.
                    101: If the file
                    102: .Dq Pa .hushlogin
                    103: exists in the user's home directory, all of these messages are suppressed.
                    104: This is to simplify logins for non-human users, such as
                    105: .Xr uucp 1 .
                    106: .Nm Login
                    107: then records an entry in the
                    108: .Xr wtmp 5
                    109: and
                    110: .Xr utmp 5
                    111: files and executes the user's command interpreter.
                    112: .Pp
                    113: Login enters information into the environment (see
                    114: .Xr environ 7 )
                    115: specifying the user's home directory (HOME), command interpreter (SHELL),
                    116: search path (PATH), terminal type (TERM) and user name (both LOGNAME and
                    117: USER).
                    118: .Pp
                    119: The standard shells,
                    120: .Xr csh 1
                    121: and
                    122: .Xr sh 1 ,
                    123: do not fork before executing the
                    124: .Nm login
                    125: utility.
                    126: .Sh FILES
                    127: .Bl -tag -width /var/mail/userXXX -compact
                    128: .It Pa /etc/motd
                    129: message-of-the-day
                    130: .It Pa /etc/nologin
                    131: disallows logins
                    132: .It Pa /var/run/utmp
                    133: current logins
                    134: .It Pa /var/log/lastlog
                    135: last login account records
                    136: .It Pa /var/log/wtmp
                    137: login account records
                    138: .It Pa /var/mail/user
                    139: system mailboxes
                    140: .It Pa \&.hushlogin
                    141: makes login quieter
                    142: .El
                    143: .Sh SEE ALSO
                    144: .Xr chpass 1 ,
                    145: .Xr passwd 1 ,
                    146: .Xr rlogin 1 ,
                    147: .Xr skey 1 ,
                    148: .Xr getpass 3 ,
                    149: .Xr utmp 5 ,
                    150: .Xr environ 7
                    151: .Sh HISTORY
                    152: A
                    153: .Nm login
                    154: appeared in
                    155: .At v6 .