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OpenDarwin 7.2.1 - man page for login (opendarwin section 1)

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LOGIN(1)			   BSD General Commands Manual				 LOGIN(1)

NAME
     login -- log into the computer

SYNOPSIS
     login [-fp] [-h hostname] [user]

DESCRIPTION
     The login utility logs users (and pseudo-users) into the computer system.

     If no user is specified, or if a user is specified and authentication of the user fails,
     login prompts for a user name.  Authentication of users is done via passwords.

     The options are as follows:

     -f      The -f option is used when a user name is specified to indicate that proper authen-
	     tication 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.

     -h      The -h option specifies the host from which the connection was received.  It is used
	     by various daemons such as telnetd(8).  This option may only be used by the super-
	     user.

     -p      By default, login discards any previous environment.  The -p option disables this
	     behavior.

     If the file /etc/nologin exists, login dislays its contents to the user and exits.  This is
     used by shutdown(8) to prevent users from logging in when the system is about to go down.

     Immediately after logging a user in, 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 ``.hushlogin'' exists in the user's home directory, all of these messages are sup-
     pressed.  This is to simplify logins for non-human users, such as uucp(1).  Login then
     records an entry in the wtmp(5) and utmp(5) files and executes the user's command inter-
     preter.

     Login enters information into the environment (see 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).

     The standard shells, csh(1) and sh(1), do not fork before executing the login utility.

FILES
     /etc/motd		message-of-the-day
     /etc/nologin	disallows logins
     /var/run/utmp	current logins
     /var/log/lastlog	last login account records
     /var/log/wtmp	login account records
     /var/mail/user	system mailboxes
     .hushlogin 	makes login quieter

SEE ALSO
     chpass(1), passwd(1), rlogin(1), getpass(3), utmp(5), environ(7),

HISTORY
     A login appeared in Version 6 AT&T UNIX.

4th Berkeley Distribution		   May 5, 1994			4th Berkeley Distribution
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