| GETTY(8) | System Manager's Manual | GETTY(8) |
getty — set
terminal mode
getty |
[type [tty]] |
The getty utility is called by
launchd(8) to open and initialize the
tty line, read a login name, and invoke
login(1).
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) 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.
Most of the default actions of getty can
be circumvented, or modified, by a suitable gettytab
table.
The getty utility 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.
A terminal which is turned on in the ttys 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), tty(4), gettytab(5), ttys(5), launchd(8)
A getty utility appeared in
Version 3 AT&T UNIX.
| July 21, 2020 | macOS 15.2 |