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author | Rodney W. Grimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
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committer | Rodney W. Grimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
commit | 9b50d9027575220cb6dd09b3e62f03f511e908b8 (patch) | |
tree | defc987843071f19a5891a97145437d43cba2af8 /usr.bin/login/login.1 | |
parent | efd31c5952bb9bb2485c109382100127424f8611 (diff) | |
download | src-9b50d9027575220cb6dd09b3e62f03f511e908b8.tar.gz src-9b50d9027575220cb6dd09b3e62f03f511e908b8.zip |
BSD 4.4 Lite Usr.bin Sources
Notes
Notes:
svn path=/cvs2svn/branches/CHRISTOS/; revision=1590
Diffstat (limited to 'usr.bin/login/login.1')
-rw-r--r-- | usr.bin/login/login.1 | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/usr.bin/login/login.1 b/usr.bin/login/login.1 new file mode 100644 index 000000000000..db59c1ab9d38 --- /dev/null +++ b/usr.bin/login/login.1 @@ -0,0 +1,146 @@ +.\" Copyright (c) 1980, 1990, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" 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. +.\" +.\" 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. +.\" +.\" @(#)login.1 8.1 (Berkeley) 6/9/93 +.\" +.Dd June 9, 1993 +.Dt LOGIN 1 +.Os BSD 4 +.Sh NAME +.Nm login +.Nd log into the computer +.Sh SYNOPSIS +.Nm login +.Op Fl fp +.Op Fl h Ar hostname +.Op Ar user +.Sh DESCRIPTION +The +.Nm login +utility logs users (and pseudo-users) into the computer system. +.Pp +If no user is specified, or if a user is specified and authentication +of the user fails, +.Nm login +prompts for a user name. +Authentication of users is done via passwords. +.Pp +The options are as follows: +.Bl -tag -width Ds +.It Fl f +The +.Fl f +option is used when a user name is specified to indicate that proper +authentication has already been done and that no password need be +requested. +This option may only be used by the super-user or when an already +logged in user is logging in as themselves. +.It Fl h +The +.Fl h +option specifies the host from which the connection was received. +It is used by various daemons such as +.Xr telnetd 8 . +This option may only be used by the super-user. +.It Fl p +By default, +.Nm login +discards any previous environment. +The +.Fl p +option disables this behavior. +.El +.Pp +If the file +.Pa /etc/nologin +exists, +.Nm login +dislays its contents to the user and exits. +This is used by +.Xr shutdown 8 +to prevent users from logging in when the system is about to go down. +.Pp +Immediately after logging a user in, +.Nm login +displays the system copyright notice, the date and time the user last +logged in, the message of the day as well as other information. +If the file +.Dq Pa .hushlogin +exists in the user's home directory, all of these messages are suppressed. +This is to simplify logins for non-human users, such as +.Xr uucp 1 . +.Nm Login +then records an entry in the +.Xr wtmp 5 +and +.Xr utmp 5 +files and executes the user's command interpretor. +.Pp +Login enters information into the environment (see +.Xr environ 7 ) +specifying the user's home directory (HOME), command interpreter (SHELL), +search path (PATH), terminal type (TERM) and user name (both LOGNAME and +USER). +.Pp +The standard shells, +.Xr csh 1 +and +.Xr sh 1 , +do not fork before executing the +.Nm login +utility. +.Sh FILES +.Bl -tag -width /var/mail/userXXX -compact +.It Pa /etc/motd +message-of-the-day +.It Pa /etc/nologin +disallows logins +.It Pa /var/run/utmp +current logins +.It Pa /var/log/wtmp +login account records +.It Pa /var/mail/user +system mailboxes +.It Pa \&.hushlogin +makes login quieter +.El +.Sh SEE ALSO +.Xr chpass 1 , +.Xr passwd 1 , +.Xr rlogin 1 , +.Xr getpass 3 , +.Xr utmp 5 , +.Xr environ 7 , +.Sh HISTORY +A +.Nm login +appeared in +.At v6 . |