BSD 4_4 development

Work on file usr/share/man/cat1/login.0

Synthesized-from: CSRG/cd3/4.4

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+LOGIN(1)                     BSD Reference Manual                     LOGIN(1)
+
+N\bNA\bAM\bME\bE
+     l\blo\bog\bgi\bin\bn - log into the computer
+
+S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
+     l\blo\bog\bgi\bin\bn [-\b-f\bfp\bp] [-\b-h\bh _\bh_\bo_\bs_\bt_\bn_\ba_\bm_\be] [_\bu_\bs_\be_\br]
+
+D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
+     The l\blo\bog\bgi\bin\bn 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, l\blo\bog\bgi\bin\bn prompts for a user name.  Authentication of users
+     is done via passwords.
+
+     The options are as follows:
+
+     -\b-f\bf      The -\b-f\bf 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.
+
+     -\b-h\bh      The -\b-h\bh 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.
+
+     -\b-p\bp      By default, l\blo\bog\bgi\bin\bn discards any previous environment.  The -\b-p\bp op-
+             tion disables this behavior.
+
+     If the file _\b/_\be_\bt_\bc_\b/_\bn_\bo_\bl_\bo_\bg_\bi_\bn exists, l\blo\bog\bgi\bin\bn 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, l\blo\bog\bgi\bin\bn 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 ``_\b._\bh_\bu_\bs_\bh_\bl_\bo_\bg_\bi_\bn'' exists in the
+     user's home directory, all of these messages are suppressed.  This is to
+     simplify logins for non-human users, such as uucp(1).  L\bLo\bog\bgi\bin\bn then records
+     an entry in the wtmp(5) and utmp(5) files and executes the user's command
+     interpretor.
+
+     Login enters information into the environment (see environ(7))  specify-
+     ing 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
+     l\blo\bog\bgi\bin\bn utility.
+
+F\bFI\bIL\bLE\bES\bS
+     /etc/motd          message-of-the-day
+     /etc/nologin       disallows logins
+     /var/run/utmp      current logins
+     /var/log/wtmp      login account records
+     /var/mail/user     system mailboxes
+     .hushlogin         makes login quieter
+
+S\bSE\bEE\bE A\bAL\bLS\bSO\bO
+     chpass(1),  passwd(1),  rlogin(1),  getpass(3),  utmp(5),  environ(7),
+
+H\bHI\bIS\bST\bTO\bOR\bRY\bY
+     A l\blo\bog\bgi\bin\bn appeared in Version 6 AT&T UNIX.
+
+4th Berkeley Distribution        June 9, 1993                                1