stty(1bsd)

Synopsis

Description

In the input and output of stty, if a character is preceded by a caret (^), then the value of that option is the corresponding CTRL character (for example, ``^h'' is CTRL-h; in this case, recall that CTRL-h is the same as the ``backspace'' key.) The sequence ``^´'' means that an option has a null value.

-a

reports all of the option settings.

-g

reports current settings in a form that can be used as an argument to another stty command.

-h

reports all the option settings with the control characters in an easy to read column format.

Options in the last group are implemented using options in the previous groups. Note that many combinations of options make no sense, but no sanity checking is performed. Hardware flow control and clock modes options may not be supported by all hardware interfaces. The options are selected from the following:

Special requests

all

Reports the same option settings as stty without arguments, but with the control characters in column format.

everything

Everything stty knows about is printed. Same as -h option.

speed

The terminal speed alone is reported on the standard output.

size

The terminal (window) sizes are printed on the standard output, first rows and then columns. This option is only appropriate if currently running a window system.

size and speed always report on the settings of /dev/tty, and always report the settings to the standard output.

Control modes

parenb (-parenb)

enable (disable) parity generation and detection.

parext (-parext)

enable (disable) extended parity generation and detection for mark and space parity.

parodd (-parodd)

select odd (even) parity, or mark (space) parity if parext is enabled.

cs5 cs6 cs7 cs8

select character size [see termio(7)].

0

hang up line immediately.

110 300 600 1200 1800 2400 4800 9600 19200 exta 38400 extb

Set terminal baud rate to the number given, if possible. (All speeds are not supported by all hardware interfaces.)

ispeed 0 110 300 600 1200 1800 2400 4800 9600 19200 exta 38400 extb

Set terminal input baud rate to the number given, if possible. (Not all hardware supports split baud rates.) If the input baud rate is set to zero, the input baud rate will be specified by the value of the output baud rate.

ospeed 0 110 300 600 1200 1800 2400 4800 9600 19200 exta 38400 extb

Set terminal output baud rate to the number given, if possible. (Not all hardware supports split baud rates.) If the baud rate is set to zero, the line will be hung up immediately.

hupcl (-hupcl)

hang up (do not hang up) connection on last close.

hup (-hup)

same as hupcl (-hupcl).

cstopb (-cstopb)

use two (one) stop bits per character.

cread (-cread)

enable (disable) the receiver.

clocal (-clocal)

assume a line without (with) modem control.

loblk (-loblk)

block (do not block) output from a non-current layer.

Input modes

ignbrk (-ignbrk)

ignore (do not ignore) break on input.

brkint (-brkint)

signal (do not signal) INTR on break.

ignpar (-ignpar)

ignore (do not ignore) parity errors.

parmrk (-parmrk)

mark (do not mark) parity errors [see termio(7)].

inpck (-inpck)

enable (disable) input parity checking.

istrip (-istrip)

strip (do not strip) input characters to seven bits.

inlcr (-inlcr)

map (do not map) NL to CR on input.

igncr (-igncr)

ignore (do not ignore) CR on input.

icrnl (-icrnl)

map (do not map) CR to NL on input.

iuclc (-iuclc)

map (do not map) upper-case alphabetics to lower case on input.

ixon (-ixon)

enable (disable) START/STOP output control. Output is stopped by sending an STOP and started by sending an START.

ixany (-ixany)

allow any character (only START) to restart output.

decctlq (-decctlq)

Same as -ixany.

ixoff (-ixoff)

request that the system send (not send) START/STOP characters when the input queue is nearly empty/full.

tandem (-tandem)

Same as ixoff.

imaxbel (-imaxbel)

echo (do not echo) BEL when the input line is too long.

iexten (-iexten)

enable (disable) extended (implementation-defined) functions for input data.

Output modes

opost (-opost)

post-process output (do not post-process output; ignore all other output modes).

olcuc (-olcuc)

map (do not map) lower-case alphabetics to upper case on output.

onlcr (-onlcr)

map (do not map) NL to CR-NL on output.

ocrnl (-ocrnl)

map (do not map) CR to NL on output.

onocr (-onocr)

do not (do) output CRs at column zero.

onlret (-onlret)

on the terminal NL performs (does not perform) the CR function.

ofill (-ofill)

use fill characters (use timing) for delays.

ofdel (-ofdel)

fill characters are <Del>s (NULs).

cr0 cr1 cr2 cr3

select style of delay for carriage returns [see termio(7)].

nl0 nl1

select style of delay for line-feeds [see termio(7)].

tab0 tab1 tab2 tab3

select style of delay for horizontal tabs [see termio(7)].

bs0 bs1

select style of delay for backspaces [see termio(7)].

ff0 ff1

select style of delay for form-feeds [see termio(7)].

vt0 vt1

select style of delay for vertical tabs [see termio(7)].

Local modes

isig (-isig)

enable (disable) the checking of characters against the special control characters INTR, QUIT, and SWTCH.

icanon (-icanon)

enable (disable) canonical input (ERASE and KILL processing).

cbreak (-cbreak)

Same as -icanon.

xcase (-xcase)

canonical (unprocessed) upper/lower-case presentation.

echo (-echo)

echo back (do not echo back) every character typed.

echoe (-echoe)

echo (do not echo) ERASE character as a backspace-space-backspace string. Note: this mode will erase the ERASEed character on many CRT terminals; however, it does not keep track of column position and, as a result, may be confusing on escaped characters, tabs, and backspaces.

crterase (-crterase)

Same as echoe.

echok (-echok)

echo (do not echo) NL after KILL character.

lfkc (-lfkc)

the same as echok (-echok); obsolete.

echonl (-echonl)

echo (do not echo) NL.

noflsh (-noflsh)

disable (enable) flush after INTR, QUIT, or SWTCH.

stwrap (-stwrap)

disable (enable) truncation of lines longer than 79 characters on a synchronous line.

tostop (-tostop)

send (do not send) SIGTTOU for background processes.

echoctl (-echoctl)

echo (do not echo) control characters as ^char, delete as ^?

ctlecho (-ctlecho)

Same as echoctl.

echoprt (-echoprt)

echo (do not echo) erase character as character is ``erased''.

prterase (-prterase)

Same as echoprt.

echoke (-echoke)

BS-SP-BS erase (do not BS-SP-BS erase) entire line on line kill.

crtkill (-crtkill)

Same as echoke.

flusho (-flusho)

output is (is not) being flushed.

pendin (-pendin)

retype (do not retype) pending input at next read or input character.

stflush (-stflush)

enable (disable) flush on a synchronous line after every write(2).

stappl (-stappl)

use application mode (use line mode) on a synchronous line.

Hardware flow control modes

rtsxoff (-rtsxoff)

enable (disable) RTS hardware flow control on input.

ctsxon (-ctsxon)

enable (disable) CTS hardware flow control on output.

dterxoff (-dterxoff)

enable (disable) DTER hardware flow control on input.

rlsdxon (-rlsdxon)

enable (disable) RLSD hardware flow control on output.

isxoff (-isxoff)

enable (disable) isochronous hardware flow control on input.

Clock modes

xcibrg

get transmit clock from internal baud rate generator.

xctset

get the transmit clock from transmitter signal element timing (DCE source) lead, CCITT V.24 circuit 114, EIA-232-D pin 15.

xcrset

get transmit clock from receiver signal element timing (DCE source) lead, CCITT V.24 circuit 115, EIA-232-D pin 17.

rcibrg

get receive clock from internal baud rate generator.

rctset

get receive clock from transmitter signal element timing (DCE source) lead, CCITT V.24 circuit 114, EIA-232-D pin 15.

rcrset

get receive clock from receiver signal element timing (DCE source) lead, CCITT V.24 circuit 115, EIA-232-D pin 17.

tsetcoff

transmitter signal element timing clock not provided.

tsetcrc

output receive clock on transmitter signal element timing (DTE source) lead, CCITT V.24 circuit 113, EIA-232-D pin 24, clock source.

tsetcxc

output transmit clock on transmitter signal element timing (DTE source) lead, CCITT V.24 circuit 113, EIA-232-D pin 24, clock source.

rsetcoff

receiver signal element timing clock not provided.

rsetcrc

output receive clock on receiver signal element timing (DTE source) lead, CCITT V.24 circuit 128, no EIA-232-D pin, clock source.

rsetcxc

output transmit clock on receiver signal element timing (DTE source) lead, CCITT V.24 circuit 128, no EIA-232-D pin, clock source.

Control assignments

``control-character c''

set ``control-character'' to c, where ``control-character'' is intr, quit, erase, kill, eof, eol, eol2, swtch, start, stop, susp, dsusp, rprnt, flush, werase, lnext min, ctab, time, or brk) [ctab is used with -stappl; min and time are used with -icanon; see termio(7)]. If c is preceded by an (escaped from the shell) caret (^), then the value used is the corresponding CTRL character (for example, ``^d'' is a CTRL-d); ``^?'' is interpreted as <Del> and ``^-'' is interpreted as undefined.

line i

set line discipline to i (0 < i < 127 ).

Combination modes

evenp or parity

enable parenb and cs7.

-evenp, or -parity

disable parenb, and set cs8.

even (-even)

Same as evenp (-evenp).

oddp

enable parenb, cs7, and parodd.

-oddp

disable parenb and parodd, and set cs8.

odd (-odd)

Same as oddp (-oddp).

spacep

enable parenb, cs7, and parext.

-spacep

disable parenb and parext, and set cs8.

markp

enable parenb, cs7, parodd, and parext.

-markp

disable parenb, parodd, and parext, and set cs8.

raw (-raw or cooked)

enable (disable) raw input and output (no ERASE, KILL, INTR, QUIT, SWTCH, EOT, or output post processing).

nl (-nl)

unset (set) icrnl, onlcr. In addition -nl unsets inlcr, igncr, ocrnl, and onlret.

lcase (-lcase)

set (unset) xcase, iuclc, and olcuc.

LCASE (-LCASE)

same as lcase (-lcase).

tabs (-tabs or tab3)

preserve (expand to spaces) tabs when printing.

ek

reset ERASE and KILL characters back to normal # and @.

sane

resets all modes to some reasonable values.

term

set all modes suitable for the terminal type term, where term is one of tty33, tty37, vt05, tn300, ti700, or tek.

async

set normal asynchronous communications where clock settings are xcibrg, rcibrg, tsetcoff and rsetcoff.

litout (-litout)

Disable (enable) parenb, istrip, and opost, and set cs8 (cs7).

pass8 (-pass8)

Disable (enable) parenb and istrip, and set cs8 (cs7).

crt

Set options for a CRT (echoe, echoctl, and, if >= 1200 baud, echoke.)

dec

Set all modes suitable for Digital Equipment Corp. operating systems users (ERASE, KILL, and INTR characters to ^?, ^U, and ^C, decctlq, and crt.)

Window size

rows n

set window size to n rows.

columns n

set window size to n columns.

cols n

An alias for columns n.

ypixels n

set vertical window size to n pixels.

xpixels n

set horizontal window size to n pixels.

References