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NetBSD 6.1.5 - man page for getty (netbsd section 8)

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 argu-
     ment is used as an index into the gettytab(5) database, 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 banner 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 reasonably 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


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