STTY(1)

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
    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.

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

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.

COPYRIGHT
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.