getty(8) [netbsd man page]

GETTY(8)						    BSD System Manager's Manual 						  GETTY(8)

NAME

     getty, uugetty -- set terminal modes for system access

SYNOPSIS

     getty [type [tty]]
     uugetty [type [tty]]

DESCRIPTION

     The getty program is called by init(8) to open and initialize the tty line, read a login name, and invoke login(1).  The devices on which to
     run getty are normally determined by ttys(5).

     The getty program can also recognize a Point to Point Protocol (PPP) negotiation, and, if the pp attribute in gettytab(5) is set, invoke the
     program given by that string, e.g., pppd(8), instead of login(1).	This makes it possible to use a single serial port for either a "shell"
     account with command line interface, or a PPP network link.

     The argument tty is the special device file in /dev to open for the terminal (for example, "ttyh0").  If there is no argument or the argument
     is '-', the tty line is assumed to be open as file descriptor 0.

     The type argument can be used to make getty treat the terminal line specially.  This argument is used as an index into the gettytab(5) data-
     base, to determine the characteristics of the line.  If there is no argument, or there is no such table, the default table is used.  If there
     is no /etc/gettytab a set of system defaults is used.  If indicated by the table located, getty will clear the terminal screen, print a ban-
     ner heading, and prompt for a login name.	Usually either the banner or the login prompt will include the system hostname.

     getty uses the ttyaction(3) facility with an action of "getty" and user "root" to execute site-specific commands when it starts.

     Most of the default actions of getty can be circumvented, or modified, by a suitable gettytab(5) table.

     The getty program can be set to timeout after some interval, which will cause dial up lines to hang up if the login name is not entered rea-
     sonably quickly.

     The uugetty program is the same, except that it uses pidlock(3) to respect the locks in /var/spool/lock of processes that dial out on that
     tty.

FILES

     /etc/gettytab
     /etc/ttys
     /var/spool/lock/LCK..ttyXX

DIAGNOSTICS

     ttyxx: No such device or address.
     ttyxx: No such file or address.  A terminal which is turned on in the ttys(5) file cannot be opened, likely because the requisite lines are
     either not configured into the system, the associated device was not attached during boot-time system configuration, or the special file in
     /dev does not exist.

SEE ALSO

     login(1), ioctl(2), pidlock(3), ttyaction(3), tty(4), gettytab(5), ttys(5), init(8), pppd(8)

HISTORY

     A getty program appeared in Version 6 AT&T UNIX.

BSD
								 December 12, 1998							       BSD

Check Out this Related Man Page

GETTY(8)						      System Manager's Manual							  GETTY(8)

NAME

       getty  - set typewriter mode

SYNOPSIS

       /etc/getty [ char ]

DESCRIPTION

       Getty  is  invoked  by  init(8)	immediately  after  a  typewriter is opened following a dial-up.  It reads the user's login name and calls
       login(1) 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  a  single character argument taken from the ttys(5) file entry for the terminal line.	This argument determines a
       sequence of line speeds through which getty cycles, and also the `login:' greeting message, which can contain character	sequences  to  put
       various kinds of terminals in useful states.

       The user's name is terminated by a new-line or carriage-return character.  In the second case CRMOD mode is set (see ioctl(2)).

       The  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.

       If the terminal's `break' key is depressed, getty cycles to the next speed appropriate to the type of line and prints the greeting  message
       again.

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

       The following arguments from the ttys file are understood.

       0      Cycles through 300-1200-150-110 baud.  Useful as a default for dialup lines accessed by a variety of terminals.

       -      Intended for an on-line Teletype model 33, for example an operator's console.

       1      Optimized for a 150-baud Teletype model 37.

       2      Intended for an on-line 9600-baud terminal, for example the Textronix 4104.

       3      Starts at 1200 baud, cycles to 300 and back.  Useful with 212 datasets where most terminals run at 1200 speed.

       5      Same as `3' but starts at 300.

       4      Useful for on-line console DECwriter (LA36).

SEE ALSO

       init(8), login(1), ioctl(2), ttys(5)

																	  GETTY(8)

Linux and UNIX Man Pages

getty(8) [netbsd man page]

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