GETTY(8) BSD System Manager's Manual GETTY(8)
getty, uugetty -- set terminal modes for system access
getty [type [tty]]
uugetty [type [tty]]
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 ter-
minal (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 spe-
cially. This argument 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 ta-
ble located, getty will clear the terminal screen, print a banner head-
ing, 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 reason-
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
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.
login(1), ioctl(2), pidlock(3), ttyaction(3), tty(4), gettytab(5),
ttys(5), init(8), pppd(8)
A getty program appeared in Version 6 AT&T UNIX.
BSD December 12, 1998 BSD