man(1) Manual page archive


NAME
     getty  - set typewriter mode

SYNOPSIS
     /etc/getty [ char ]

DESCRIPTION
     Getty is invoked by init (VIII) immediately after a type-
     writer is opened following a dial-up.  It reads the user's
     name and invokes the login command (I) with the name as
     argument.  While reading the name getty attempts to adapt
     the system to the speed and type of terminal being used.

     Init calls getty with an argument specified by the ttys file
     entry for the typewriter line.  Arguments other than `0' can
     be used to make getty treat the line specially.  Normally,
     it sets the speed of the interface to 300 baud, specifies
     that raw mode is to be used (break on every character), that
     echo is to be suppressed, and either parity allowed.  It
     types the ``login:'' message, which includes the characters
     which put the Terminet 300 terminal into full-duplex and
     return the GSI terminal to non-graphic mode.  Then the
     user's name is read, a character at a time.  If a null char-
     acter is received, it is assumed to be the result of the
     user pushing the ``break'' (``interrupt'') key.  The speed
     is then changed to 150 baud and the ``login:'' is typed
     again, this time including the character sequence which puts
     a Teletype 37 into full-duplex.  If a subsequent null char-
     acter is received, the speed is changed back to 300 baud.

     The user's name is terminated by a new-line or carriage-
     return character.  The latter results in the system being
     set to treat carriage returns appropriately (see stty (II)).

     The user's name is scanned to see if it contains any lower-
     case alphabetic characters; if not, and if the name is
     nonempty, the system is told to map any future upper-case
     characters into the corresponding lower-case characters.

     Finally, login is called with the user's name as argument.

SEE ALSO
     init (VIII), login (I), stty (II), ttys (V)

BUGS

 1