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NAME    [Toc]    [Back]

     ttys - terminal initialization information

DESCRIPTION    [Toc]    [Back]

     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

     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
              second field.

     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
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

FILES    [Toc]    [Back]


EXAMPLES    [Toc]    [Back]

     # 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

SEE ALSO    [Toc]    [Back]

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

HISTORY    [Toc]    [Back]

     A ttys file appeared in Version 6 AT&T UNIX.

OpenBSD      3.6                           June      4,      1993
[ Back ]
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