TTYS(5) OpenBSD Programmer's Manual TTYS(5)NAMEttys - terminal initialization information
DESCRIPTION
The ttys file contains information that is used by various routines to
initialize and control the use of terminal special files. This
information 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
anywhere in the file; comments are delimited by hash marks (`#') and
newlines. Any unspecified fields will default to null.
The first field is the name of the terminal special file as it is found
in /dev.
The second field of the file is the command to execute for the line,
usually getty(8), which initializes and opens the line, setting the
speed, 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
window system terminal emulator or some other daemon process, and can
contain multiple words if quoted.
The third field is the type of terminal usually connected to that TTY
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 login(1).
The remaining fields set flags in the ty_status entry (see getttyent(3))
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
second field.
off The opposite of on.
secure If on is also specified, allows users with a UID of 0 to log in
on this line. If set for the console entry, then init(8) will
start a single-user shell without asking for the superuser
password.
Additionally, the following flags modify the default behavior of the
terminal line. Some of these flags may not be supported by a terminal
line 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 string which
init(8) will execute before starting the command specified by the second
field.
FILES
/etc/ttys
EXAMPLES
# 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 # 555-1234
# 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
SEE ALSOlogin(1), getttyent(3), ttyslot(3), gettytab(5), termcap(5), getty(8),
init(8), ttyflags(8)HISTORY
A ttys file appeared in Version 6 AT&T UNIX.
OpenBSD 4.9 October 22, 2008 OpenBSD 4.9