stty - set terminal parameters
stty speed ispeed speed ospeed speed cs5 cs6 cs7 cs8 [-]parenb [-]parodd
[-]hupcl [-]cstopb [-]cread [-]clocal [-]ignbrk [-]brkint [-]ignpar
[-]parmrk [-]inpck [-]istrip [-]inlcr [-]igncr [-]icrnl [-]ixon
[-]ixoff [-]ixany [-]opost [-]onlcr [-]xtabs [-]onoeot [-]isig
[-]icanon [-]iexten [-]echo [-]echoe [-]echok [-]echonl [-]noflsh
[-]lflusho eof=c eol=c erase=c erase=c intr=c kill=c quit=c susp=c
start=c stop=c rprnt=c lnext=c flush=c min=n time=n rows n cols n
xpixels n ypixels n cooked raw [-]evenp [-]parity [-]oddp [-]nl ek
Stty shows or changes the parameters of the terminal connected to
standard input. Stty takes a myriad of arguments most of which are
mapped directly to the flags and special characters described in tty(4),
so we won't describe them here.
Stty has three forms of operation. First, without any arguments stty
shows all terminal attributes that are different from the default state.
Option -a makes stty print all terminal attributes, and -g lets stty
print the attributes in a special encoded form, a simple row of colon
separated hexadecimal numbers.
In the second form of operation stty takes an encoded form as produced by
the -g option and sets the terminals attributes to its decoded value.
In the third form stty interprets a series of flags and parameters
settings and modifies the terminal attributes accordingly. Flags can be
given as icanon or -icanon for instance, either setting or clearing the
ICANON flag. Special character values can by set like intr=^C for
example, which sets the interrupt character to CTRL-C. You can either
use a real CTRL-C, or the two characters `^' and `C'. In any case it is
probably necessary to use quotes to guard it from the shell: intr='^C'.
A number alone is interpreted as a baud rate setting for both the input
and output rate. The input or the output rate can be set separately with
use of the ispeed and ospeed prefixes to the number. The character size
can be set with cs5, cs6, cs7 or cs8.
The MIN and TIME value, the number of rows and columns, and the xpixels
and ypixels of the window can also be set using one of the keywords min,
time, rows, cols, xpixels or ypixels, followed by a decimal number that
is the value of the setting.
Stty accepts several keywords that are not named by corresponding flags
or parameters in tty(4). They set several attributes at once:
Same as icrnl ixon opost onlcr isig icanon iexten echo, setting all
the attributes that are needed for line oriented mode.
raw Same as -icrnl -ixon -opost -onlcr -isig -icanon -iexten -echo,
setting all the attributes for a raw data channel.
These synonyms are equal to cs7 parenb -parodd, setting the line to
7 bits even parity.
oddp Same as cs7 parenb parodd, setting the line to 7 bits odd parity.
-parity -evenp -oddp
All synonyms for cs8 -parenb, setting the line to 8 bits, no parity.
nl Same as icrnl, setting carriage return to line feed input
-nl Same as -icrnl -inlcr -igncr, disabling any carriage return or line
ek Set the ERASE and KILL special characters back to the default.
sane Set all attributes to the default except things like the line speed
and parity, because their "sane" value is probably what it is right
now. The default values are compiled into stty from the <termios.h>
include file. Use stty sane; stty -a to know what they are.
/etc/ttytab The init field of this file may contain an stty command to
set the attributes to match an attached RS232 terminal or
The cooked, raw, rows, cols, xpixels and ypixels keywords are Minix
additions beyond the keywords defined by POSIX. Rows and cols are common
UNIX extensions, however. There are more Minix specific flags that match
the Minix specific attributes described in tty(4).
Kees J. Bot (firstname.lastname@example.org)