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STTY


Section: User Commands (1)
Updated: March 2014
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NAME

stty – change and print terminal line settings
 

SYNOPSIS

stty

[-F DEVICE | --file=DEVICE] [SETTING]…

stty

[-F DEVICE | --file=DEVICE] [-a|--all]

stty

[-F DEVICE | --file=DEVICE] [-g|--save]
 

DESCRIPTION

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=DEVICE

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
* [-]cdtrdsr

enable DTR/DSR 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
* [-]iutf8

assume input characters are UTF-8 encoded
* [-]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 -iutf8
-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.
 

AUTHOR

Written by David MacKenzie.
 

REPORTING BUGS

Report stty bugs to [email protected]

GNU coreutils home page: <http://www.gnu.org/software/coreutils/>

General help using GNU software: <http://www.gnu.org/gethelp/>

Report stty translation bugs to <http://translationproject.org/team/>
 

COPYRIGHT

Copyright © 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.

This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
 

SEE ALSO

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 coreutils ‘stty invocation’


should give you access to the complete manual.



 

Index



NAME

SYNOPSIS

DESCRIPTION


Special characters:

Special settings:

Control settings:

Input settings:

Output settings:

Local settings:

Combination settings:


AUTHOR

REPORTING BUGS

COPYRIGHT

SEE ALSO



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