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 ter
minal 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
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 com
pleted 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 `-')
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 lower
case * [-]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)
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) charac
ters instead of timing for delays * [-]olcuc trans
late 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 con
trol 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 char
acters
enable non-POSIX special characters
[-]isig
enable interrupt, quit, and suspend special charac
ters
[-]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 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 devia
tions from stty sane. In settings, CHAR is taken liter
ally, 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 bugs to <bug-sh-utils@gnu.org>.
COPYRIGHT
Copyright © 2000 Free Software Foundation, Inc.
This is free software; see the source for copying condi
tions. There is NO warranty; not even for MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
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 stty
should give you access to the complete manual.
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