ttys - terminal initialization information
The ttys file contains information that is used by various
initialize and control the use of terminal special files.
is read with the getttyent(3) library routines. There
is one line
in the ttys file per special device file. Fields are separated by tabs
and/or spaces. Fields comprised of more than one word
should be enclosed
in double quotes (`"'). Blank lines and comments may appear
the file; comments are delimited by hash marks (`#') and
unspecified fields will default to null.
The first field is the name of the terminal special file as
it is found
The second field of the file is the command to execute for
the line, usually
getty(8), which initializes and opens the line, setting
waiting for a user name and executing the login(1) program.
It can be,
however, any desired command, for example the start up for a
terminal emulator or some other daemon process, and can
words if quoted.
The third field is the type of terminal usually connected to
line, normally the one found in the termcap(5) database
file. The environment
variable TERM is initialized with the value by either getty(8) or
The remaining fields set flags in the ty_status entry (see
or specify a window system process that init(8) will maintain for the
terminal line. The following is a list of permitted flags
for each TTY:
on Specify that init(8) should execute the command
given in the
off The opposite of on.
secure If on is also specified, allows users with a UID of
0 to login
on this line.
Additionally, the following flags modify the default behavior of the terminal
line. Some of these flags may not be supported by a
driver. The flag fields should not be quoted.
local Treat the line as if it is locally connected.
rtscts Use RTS/CTS hardware flow control, if possible.
mdmbuf Use DTR/DCD flow control if possible.
softcar Ignore hardware carrier on the line.
The string window= may be followed by a quoted command
init(8) will execute before starting the command specified
by the second
# root login on console at 1200 baud
console "/usr/libexec/getty std.1200" vt100 on secure
# dialup at 1200 baud, no root logins
ttyd0 "/usr/libexec/getty d1200" dialup on #
# Mike's terminal: hp2621
ttyh0 "/usr/libexec/getty std.9600" hp2621-nl on
# 457 Evans
# John's terminal: vt100
ttyh1 "/usr/libexec/getty std.9600" vt100 on
# 459 Evans
# terminal emulate/window system
ttyv0 "/usr/new/xterm -L :0" vs100 on window="/usr/new/Xvs100 0"
# Network pseudo ttys -- don't enable getty
ttyp0 none network
ttyp1 none network off
login(1), getttyent(3), ttyslot(3), gettytab(5), termcap(5),
A ttys file appeared in Version 6 AT&T UNIX.
OpenBSD 3.6 June 4, 1993
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