STTY

stty − change and print terminal line settings

stty [-F device] [--file=device] [SETTING]...
stty [-F device] [--file=device] [-a|--all]
stty [-F device] [--file=device] [-g|--save]

Print or change terminal characteristics.

−a, −−all

print all current settings in human-readable form

−g, −−save

print all current settings in a stty-readable form

−F, −−file

open and use the specified device instead of stdin

−−help

display this help and exit

−−version

output version information and exit

Optional - before SETTING indicates negation. An * marks non-POSIX settings. The underlying system defines which settings are available.

Special characters: * dsusp CHAR CHAR will send a terminal stop signal once input flushed

eof CHAR

CHAR will send an end of file (terminate the input)

eol CHAR

CHAR will end the line

* eol2 CHAR alternate CHAR for ending the line

erase CHAR

CHAR will erase the last character typed

intr CHAR

CHAR will send an interrupt signal

kill CHAR

CHAR will erase the current line

* lnext CHAR CHAR will enter the next character quoted

quit CHAR

CHAR will send a quit signal

* rprnt CHAR CHAR will redraw the current line

start CHAR

CHAR will restart the output after stopping it

stop CHAR

CHAR will stop the output

susp CHAR

CHAR will send a terminal stop signal

* swtch CHAR CHAR will switch to a different shell layer * werase CHAR CHAR will erase the last word typed

Special settings:

N

set the input and output speeds to N bauds

* cols N tell the kernel that the terminal has N columns * columns N same as cols N

ispeed N

set the input speed to N

* line N use line discipline N

min N

with −icanon, set N characters minimum for a completed read

ospeed N

set the output speed to N

* rows N tell the kernel that the terminal has N rows * size print the number of rows and columns according to the kernel

speed

print the terminal speed

time N

with −icanon, set read timeout of N tenths of a second

Control settings:

[-]clocal

disable modem control signals

[-]cread

allow input to be received

* [-]crtscts enable RTS/CTS handshaking

csN

set character size to N bits, N in [5..8]

[-]cstopb

use two stop bits per character (one with ‘-’)

[-]hup

send a hangup signal when the last process closes the tty

[-]hupcl

same as [-]hup

[-]parenb

generate parity bit in output and expect parity bit in input

[-]parodd

set odd parity (even with ‘-’)

Input settings:

[-]brkint

breaks cause an interrupt signal

[-]icrnl

translate carriage return to newline

[-]ignbrk

ignore break characters

[-]igncr

ignore carriage return

[-]ignpar

ignore characters with parity errors

* [-]imaxbel beep and do not flush a full input buffer on a character

[-]inlcr

translate newline to carriage return

[-]inpck

enable input parity checking

[-]istrip

clear high (8th) bit of input characters

* [-]iuclc translate uppercase characters to lowercase * [-]ixany let any character restart output, not only start character

[-]ixoff

enable sending of start/stop characters

[-]ixon

enable XON/XOFF flow control

[-]parmrk

mark parity errors (with a 255-0-character sequence)

[-]tandem

same as [-]ixoff

Output settings: * bsN backspace delay style, N in [0..1] * crN carriage return delay style, N in [0..3] * ffN form feed delay style, N in [0..1] * nlN newline delay style, N in [0..1] * [-]ocrnl translate carriage return to newline * [-]ofdel use delete characters for fill instead of null characters * [-]ofill use fill (padding) characters instead of timing for delays * [-]olcuc translate lowercase characters to uppercase * [-]onlcr translate newline to carriage return-newline * [-]onlret newline performs a carriage return * [-]onocr do not print carriage returns in the first column

[-]opost

postprocess output

* tabN horizontal tab delay style, N in [0..3] * tabs same as tab0 * −tabs same as tab3 * vtN vertical tab delay style, N in [0..1]

Local settings:

[-]crterase

echo erase characters as backspace-space-backspace

* crtkill kill all line by obeying the echoprt and echoe settings * −crtkill kill all line by obeying the echoctl and echok settings * [-]ctlecho echo control characters in hat notation (‘^c’)

[-]echo

echo input characters

* [-]echoctl same as [-]ctlecho

[-]echoe

same as [-]crterase

[-]echok

echo a newline after a kill character

* [-]echoke same as [-]crtkill

[-]echonl

echo newline even if not echoing other characters

* [-]echoprt echo erased characters backward, between ‘´ and ’/’

[-]icanon

enable erase, kill, werase, and rprnt special characters

[-]iexten

enable non-POSIX special characters

[-]isig

enable interrupt, quit, and suspend special characters

[-]noflsh

disable flushing after interrupt and quit special characters

* [-]prterase same as [-]echoprt * [-]tostop stop background jobs that try to write to the terminal * [-]xcase with icanon, escape with ‘´ for uppercase characters

Combination settings: * [-]LCASE same as [-]lcase

cbreak

same as −icanon

−cbreak

same as icanon

cooked

same as brkint ignpar istrip icrnl ixon opost isig icanon, eof and eol characters to their default values

−cooked

same as raw

crt

same as echoe echoctl echoke

dec

same as echoe echoctl echoke −ixany intr ^c erase 0177 kill ^u

* [-]decctlq same as [-]ixany

ek

erase and kill characters to their default values

evenp

same as parenb −parodd cs7

−evenp

same as −parenb cs8

* [-]lcase same as xcase iuclc olcuc

litout

same as −parenb −istrip −opost cs8

−litout

same as parenb istrip opost cs7

nl

same as −icrnl −onlcr

−nl

same as icrnl −inlcr −igncr onlcr −ocrnl −onlret

oddp

same as parenb parodd cs7

−oddp

same as −parenb cs8

[-]parity

same as [-]evenp

pass8

same as −parenb −istrip cs8

−pass8

same as parenb istrip cs7

raw

same as −ignbrk −brkint −ignpar −parmrk −inpck −istrip −inlcr −igncr −icrnl −ixon −ixoff −iuclc −ixany −imaxbel −opost −isig −icanon −xcase min 1 time 0

−raw

same as cooked

sane

same as cread −ignbrk brkint −inlcr −igncr icrnl −ixoff −iuclc −ixany imaxbel opost −olcuc −ocrnl onlcr −onocr −onlret −ofill −ofdel nl0 cr0 tab0 bs0 vt0 ff0 isig icanon iexten echo echoe echok −echonl −noflsh −xcase −tostop −echoprt echoctl echoke, all special characters to their default values.

Handle the tty line connected to standard input. Without arguments, prints baud rate, line discipline, and deviations from stty sane. In settings, CHAR is taken literally, or coded as in ^c, 0x37, 0177 or 127; special values ^- or undef used to disable special characters.

Report bugs to <bug-sh-utils@gnu.org>.

The full documentation for stty is maintained as a Texinfo manual. If the info and stty programs are properly installed at your site, the command

info stty

should give you access to the complete manual.

Copyright © 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.