TTYS

Section: File Formats (5)
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BSD mandoc
 

NAME

ttys - terminal initialization information  

DESCRIPTION

The file ttys 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. The 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 new lines. 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) data base file. The environment variable TERM is initialized with the value by either getty(8) or login(1).

The remaining fields set flags in the Fa ty_status entry (see getttyent(3)) or specify a window system process that init(8) will maintain for the terminal line.

As flag values, the strings ``on'' and ``off'' specify that init should (should not) execute the command given in the second field, while ``secure'' (if ``on'' is also specified) allows users with a uid of 0 to login on this line. These flag fields should not be quoted.

The string ``window='' may be followed by a quoted command string which init will execute before starting the command specified by the second field.  

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
 

FILES

/etc/ttys

 

SEE ALSO

login(1), getttyent(3), ttyslot(3), gettytab(5), termcap(5), getty(8), init(8)  

HISTORY

A file appeared in AT&T System v6 .


 

Index

NAME
DESCRIPTION
EXAMPLES
FILES
SEE ALSO
HISTORY

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Time: 06:35:11 GMT, May 19, 2025