STTY(1) 						      General Commands Manual							   STTY(1)

NAME

       stty - set terminal options

SYNOPSIS

       stty [-a | -e] [-f file] [operands]

DESCRIPTION

       Stty  sets  certain  I/O options on the current output terminal, placing its output on the diagnostic output.  With no argument, it reports
       the speed of the terminal and the settings of the options which are different from their defaults.

       The following options are available:

       -a	 Display everything stty knows.  This has the same effect as using the operand all or everything.  The distinction between all and
		 everything has been removed.

       -e	 Same a -a above.

       -f	 Open  and  use  the  terminal	named  by file rather than using standard output.  The file is opened using the O_NONBLOCK flag of
		 open(), making it possible to set or display settings on a terminal that might otherwise block on the open.

       The following operands are special:

       all	   Everything stty knows about is printed.

       everything  Same as all above.

       flushout    Flush the queues for the device.  This is most useful when an exiting process is stuck waiting for terminal output to drain.

       speed	   The terminal speed alone is printed on the standard output.

       size	   The terminal (window) sizes are printed on the standard output, first rows and then columns.

       Operands are selected from the following:

       even	 allow even parity input
       -even	 disallow even parity input

       odd	 allow odd parity input
       -odd	 disallow odd parity input

       raw	 raw mode input (no input processing (erase, kill, interrupt, ...); parity bit passed back)
       -raw	 negate raw mode

       cooked	 same as `-raw'

       cbreak	 make each character available to read(2) as received; no erase and kill processing, but all other processing (interrupt, suspend,
		 ...) is performed
       -cbreak	 make characters available to read only when newline is received

       -nl	 allow carriage return for new-line, and output CR-LF for carriage return or new-line
       nl	 accept only new-line to end lines

       echo	 echo back every character typed
       -echo	 do not echo characters

       tandem	 enable  inbound  software  (xon/xoff) flow control, so that the system sends out the stop character when its internal queue is in
		 danger of overflowing on input, and sends the start character when it is ready to accept further input
       -tandem	 disable inbound software (xon/xoff) flow control

       -tabs	 replace tabs by spaces when printing
       tabs	 preserve tabs

       For the following commands which take a character argument c, you may also specify c as ``undef'', to set the value  to	be  undefined.	 A
       value of ``^x'', a 2 character sequence, is also interpreted as a control character, with ``^?'' representing delete.

       erase c	 set erase character to c (default `#', but often reset to ^H.)
       kill c	 set kill character to c (default `@', but often reset to ^U.)
       intr c	 set interrupt character to c (default DEL or ^? (delete), but often reset to ^C.)
       quit c	 set quit character to c (default control .)
       start c	 set start character to c (default control Q.)
       stop c	 set stop character to c (default control S.)
       eof c	 set end of file character to c (default control D.)
       brk c	 set break character to c (default undefined.)	This character is an additional character causing wakeup.
       dec	 set all modes suitable for Digital Equipment Corp. operating systems users; (erase, kill, and interrupt characters to ^?, ^U, and
		 ^C, decctlq and ``newcrt''.)

       0	 hang up phone line immediately
       50 75 110 134 150 200 300 600 1200 1800 2400 4800 9600 exta extb
		 Set terminal baud rate to the number given, if possible.  (These are the speeds supported by the DH-11 interface).

       rows n	 The terminal size is recorded as having n rows.

       columns n The terminal size is recorded as having n columns.

       cols n	 is an alias for columns.

       A teletype driver which supports the job control processing of csh(1) and more functionality than the basic driver is  fully  described	in
       tty(4).	The following options apply only to it.

       new	 Use new driver (switching flushes typeahead).
       crt	 Set options for a CRT (crtbs, ctlecho and, if >= 1200 baud, crterase and crtkill.)

       crtbs	 Echo backspaces on erase characters.

       prterase  For printing terminal echo erased characters backwards within ``'' and ``/''.

       crterase  Wipe out erased characters with ``backspace-space-backspace.''
       -crterase Leave erased characters visible; just backspace.

       crtkill	 Wipe out input on like kill ala crterase.
       -crtkill  Just echo line kill character and a newline on line kill.

       ctlecho	 Echo control characters as ``^x'' (and delete as ``^?''.)  Print two backspaces following the EOT character (control D).
       -ctlecho  Control characters echo as themselves; in cooked mode EOT (control-D) is not echoed.

       decctlq	 After	output is suspended (normally by ^S), only a start character (normally ^Q) will restart it.  This is compatible with DEC's
		 vendor supplied systems.
       -decctlq  After output is suspended, any character typed will restart it; the start character will restart  output  without  providing  any
		 input.  (This is the default.)

       tostop	 Background jobs stop if they attempt terminal output.
       -tostop	 Output from background jobs to the terminal is allowed.

       flusho	 Output is being discarded usually because user hit control O (internal state bit).
       -flusho	 Output is not being discarded.

       pendin	 Input	is  pending  after  a  switch from cbreak to cooked and will be re-input when a read becomes pending or more input arrives
		 (internal state bit).
       -pendin	 Input is not pending.

       pass8	 Passes all 8 bits through on input, in any mode.
       -pass8	 Strips the 0200 bit on input except in raw mode.

       mdmbuf	 Start/stop output on carrier transitions (not implemented).
       -mdmbuf	 Return error if write attempted after carrier drops.

       litout	 Send output characters without any processing.
       -litout	 Do normal output processing, inserting delays, etc.

       nohang	 Don't send hangup signal if carrier drops.
       -nohang	 Send hangup signal to control process group when carrier drops.

       The following special characters are applicable only to the new teletype driver and are not normally changed.

       susp c	 set suspend process character to c (default control Z).
       dsusp c	 set delayed suspend process character to c (default control Y).
       rprnt c	 set reprint line character to c (default control R).
       flush c	 set flush output character to c (default control O).
       werase c  set word erase character to c (default control W).
       lnext c	 set literal next character to c (default control V).

       Modem Control Status:

       These display the current state of modem control.  They are only displayed for actual tty lines and not for pseudo  tty	lines  (more  pre-
       cisely, it is only displayed for lines which support the TIOCMGET ioctl.  See tty(4).
       While  it  is  possible to change the state of the modem control lines, the hardware or other software may prevent the change from actually
       taking place, or may cause the state to immediately revert to the original state.

       dcd (-dcd)     State of Data Carrier Detect.

       dsr (-dsr)     State of Data Set Ready.

       dtr (-dtr)     State of Data Terminal Ready.

       cts (-cts)     State of Clear To Send.

       rts (-rts)     State of Request To Send.

SEE ALSO

       ioctl(2), tabs(1), tset(1), tty(4)

4th Berkeley Distribution					  March 27, 1997							   STTY(1)