COHERENT manpages
This page displays the COHERENT manpage for stty [Set/print terminal modes].
List of available manpages
Index
stty -- Command
Set/print terminal modes
stty
stty -a
stty -g
stty x:x: ... :x
stty arglist ...
The command stty lets you change or display the settings of the standard
input device. The device is usually a terminal, although tapes, disks and
other special files may be applicable.
Default Settings
The following describes how COHERENT sets up a terminal device by default.
This normal processing is often called ``cooked'' mode. Note that on some
machines, the default characters differ from those given below.
The erase and kill characters (normally <crtl-H> and <ctrl-U>)
erase, respectively, one typed character and an entire line of typing.
The stop-output and start-output characters (normally <ctrl-S> and
<ctrl-Q>) respectively stop and restart output.
The interrupt character (normally <ctrl-C>) sends the signal SIGINT,
which usually terminates program execution.
The quit character (normally <ctrl-\>) sends the signal SIGQUIT,
which usually terminates program execution with a core dump.
The end of file character (normally <ctrl-D>) generates an end-of-
file signal from the terminal.
You can change the setting of each special character by invoking stty with
the appropriate option.
Options
When called without any arguments, stty gives a brief listing of settings
for the standard-input device.
stty can read the settings of devices other than the standard-input device
by redirecting that device to it. For example, the command
stty < /dev/com1l
prints a brief summary of the settings for serial device com1l.
stty's command-line arguments can take a number, as indicated below by n;
or they can take a character, as indicated below by c. Argument c can be
one of the following:
-> A single character.
-> A caret `^' followed by a single character (to indicate a control
character, e.g., ^X for <ctrl-X>).
-> An ^?, which denotes the <del> character.
-> An `0x' followed by two hexadecimal digits.
-> An ^-, which indicates that that option is not used.
stty recognizes the following command-line arguments:
-a Give a complete listing of settings for the standard-input device.
-g Give a complete list of settings for the standard-input device, but
in hexadecimal. This is a dump of the termio structure in effect
at the moment. For more information on the termio structure, see
the Lexicon entry for termio.
x:x:...:x
Establish new settings for the standard-input device. The settings
are hexadecimal values that are separated by colons. This form can
be combined with -g option to copy stty settings from one device to
another. For example, to set device com2l so that it mimics device
com1l, use the following command:
stty `stty -g < /dev/com1l` < /dev/com2l
0 Hang up the telephone.
50 Set line speed to 50 bps.
75 Set line speed to 75 bps.
110 Set line speed to 110 bps.
134 Set line speed to 110 bps.
150 Set line speed to 150 bps.
200 Set line speed to 200 bps.
300 Set line speed to 300 bps.
600 Set line speed to 600 bps.
1200 Set line speed to 1200 bps.
1800 Set line speed to 1800 bps.
2400 Set line speed to 2400 bps.
4800 Set line speed to 4800 bps.
9600 Set line speed to 9600 bps.
19200 Set line speed to 19200 bps.
38400 Set line speed to 38400 bps.
brkint Send interrupt on break.
-brkint
Do not send interrupt on break.
bs0 No delay on backspace.
bs1 Delay briefly on backspace.
clocal Turn on modem control.
-clocal
Turn off modem control.
cooked Set the device into cooked mode. This is a composite of options
parenb, -parodd, cs7, brkint, ignpar, istrip, icrnl, ixon, opost,
onlcr, isig, and icanon.
cr0 No delay on carriage returns.
cr1 Carriage-return delay depends upon column position.
cr2 Delay approximately 0.10 seconds on carriage return.
cr3 Delay appoximately 0.15 seconds on carriage return.
cread Enable the receiver.
-cread Disable the receiver.
cs5 Character size is five bits.
cs6 Character size is six bits.
cs7 Character size is seven bits.
cs8 Character size is eight bits.
cstopb Use two stop bits per character.
-cstopb
Use one stop bit per character.
echo Echo every character.
-echo Do not echo characters.
echoe Echo the erase character as backspace-space-backspace.
-echoe Do not echo the erase character as backspace-space-backspace.
echok Echo newline after the kill character.
-echok Do not echo newline after the kill character.
echonl Echo newline.
-echonl
Do not echo newline.
ek Set the kill and erase characters to printable characters. A
composite of erase '#' and kill '@'.
eof c Set the end-of-file character to c.
eol c Set the end-of-line character to c.
erase c
Set the erase character to c.
evenp Set the port to even parity. This is a composite of the options
parenb, -parodd, and cs7.
-evenp Turn off even parity -- in effect, turn off parity altogether.
This is a composite of the options -parenb and cs8.
ff0 No delay on formfeeds.
ff1 Delay approximately two seconds on formfeeds.
hup Hang up the telephone on logging out.
-hup Do not hang up the telephone on logging out.
hupcl Same as hup.
-hupcl Same as -hup.
icanon Enable canonical input.
-icanon
Disable canonical input.
icrnl Map carriage-return to newline on input.
-icrnl Do not map carriage-return to newline on input.
ignbrk Ignore break on input.
-ignbrk
Do not ignore break on input.
igncr Ignore carriage return on input.
-igncr Do not ignore carriage return on input.
ignpar Ignore parity errors on input.
-ignpar
Do not ignore parity errors on input.
inlcr Map newline to carriage return on input.
-inlcr Do not map newline to carriage return on input.
inpck Enable parity checking on input.
-inpck Do not enable parity checking on input.
intr c Set the interrupt character to c.
isig Check input against interrupt and quit characters.
-isig Do not check input against interrupt and quit characters.
iuclc Map input's upper-case characters to lower case.
-iuclc Do not map input's upper-case characters to lower case.
istrip Strip input to seven bits.
-istrip
Do not strip input to seven bits.
ixany Allow any on input character to restart output.
-ixany Do not allow any input character to restart output.
ixoff Request that system send start or stop characters when the input
queue is, respectively, nearly full or nearly empty.
-ixoff Do not request that system send start or stop characters to manage
input queue.
ixon Use start/stop characters to control output queue.
-ixon Do not use start/stop characters to control output queue
kill c Set the kill character to c.
lcase Map upper-case characters to lower case. A composite of options
xcase, iuclc, and olcuc.
-lcase Turn off mapping of upper-case character to lower case. A
composite of options -xcase, -iuclc, and -olcuc.
LCASE A synonym for lcase.
-LCASE A synonym for -lcase.
min n Set the constant VMIN to decimal value n. For more about VMIN, see
the Lexicon entry for termio.
nl A composite of options -icrnl and -onlcr.
-nl A composite of options icrnl, -inlcr, -igncr, onlcr, -ocrnl, and -
onlret.
nl0 No delay on newline.
nl1 Delay approximately 0.10 seconds on newline.
noflsh Flush buffer on interrupt or quit.
-noflsh
Do not flush buffer on interrupt or quit.
ocrnl In output, map carriage return to newline.
-ocrnl In output, do not map carriage return to newline.
oddp Set device to odd parity. This option is a composite of the
options parenb, parodd, and cs7.
-oddp Turn off odd parity -- in effect, turn off parity altogether. This
is a composite of the options -parenb and cs8.
ofdel Use delete characters as fill characters.
-ofdel Do not use delete characters as fill characters.
ofill Use fill characters for delays.
-ofill Do not use fill characters for delays.
olcuc Map lower-case characters to upper case on output.
-olcuc Do not map lower-case characters to upper case on output.
onlcr Map newline to carriage return/newline on output.
-onlcr Do not map newline to carriage return/newline on output.
onlret A newline character executes a carriage return.
-onlret
A newline character does not execute a carriage return.
onocr Do not output carriage returns at column 0.
-onocr Output carriage returns at column 0.
opost Post-process output.
-opost Do not post-process output.
parenb Enable parity generation and detection.
-parenb
Disable parity generation and detection.
parity Synonym for option evenp.
-parity
Synonym for option -evenp.
parmrk Mark parity errors.
-parmrk
Do not mark parity errors.
parodd Odd parity.
-parodd
Turn off odd parity; i.e., use even parity.
quit c Set the quit character to c.
raw Set the device into raw mode. This is a composite of the options -
parenb, -parodd, -hupcl, cs8, -opost, -olcuc, -ocrnl, -onocr, -
onlret, -ofill, -ofdel, nl0, cr0, tab0, bs0, vt0, and ff0. This
turns off most character processing, including all input processing
(see c_iflag fields in <termio.h>), canonical input buffering
(-icanon), and output processing (-opost). It does not turn off
echo.
-raw Turn off raw mode -- in effect, restore the device to cooked mode.
Same as cooked.
sane Restore the device to ``sanity'' -- for example, after an editor or
communications program has died unexpectedly. This is a composite
of options icrnl, opost, onlcr, isig, icanon, -xcase, echo, echoe,
echok, and erase ^h.
tab0 No delay for horizontal-tab character.
tab1 Delay for horizontal-tab character depends on column position.
tab2 Delay approximately 0.10 seconds on horizontal tab.
tab3 Expand horizontal-tab characters into spaces.
tabs A synonym for tab0.
-tabs A synonym for tab3.
time n Set the constant VTIME to decimal value n. For more about VTIME,
see the Lexicon entry for termio.
vt0 No delay on vertical-tab characters.
vt1 Delay approximately two seconds on vertical-tab characters.
xcase Canonical presentation of upper-case and lower-case characters.
-xcase Do not process upper-case and lower-case characters.
See Also
ASCII,
commands,
getty,
init,
ioctl(),
signal()
Notes
Executing stty with input redirected from another device does not have an
effect unless the device being read is open. The last close of any
terminal device resets all termio values to the system defaults. Thus, to
change the settings of a device, you must first open the device.
For example,
enable com1l
or
sleep 32000 > /dev/com1l &
might precede:
stty evenp < /dev/com1l
Note, too, that stty does not check its arguments for consistency.
stty provides complete access to the System-V-style termio structure.
Note, however, that the settings of termio are processed by the kernel's
in-line discipline and device-driver modules. Under COHERENT, none of
these modules pays attention to delay settings. Therefore, setting delays
with stty does not, at present, affect the behavior of the terminal device.
