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Full Discussion: Bash replacement to getchar
Top Forums Shell Programming and Scripting Bash replacement to getchar Post 302343578 by kshji on Thursday 13th of August 2009 02:48:08 AM
Old 08-13-2009
Generic for all shells
Code:
read -n1 kbd

If you not echo then use stty -echo before read and stty echo after.

Also this "old standard" works:
Code:
echo -n "Press key:"
stty -echo raw
c=$(dd bs=1 count=1 2>/dev/null )
stty echo -raw
echo " key:$c"

Ofcourse you can save current stty and return it, but usually echo is on and raw is off.

Ksh include KEYBD interrupt = you can trap KEYBD.
Code:
keybd()
{
    key="${.sh.edchar}"
}

trap 'keybd' KEYBD
while :
do
        read a
done

 

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STTY(1) 						      General Commands Manual							   STTY(1)

NAME
stty - set terminal options SYNOPSIS
stty [ option ... ] DESCRIPTION
Stty sets certain I/O options on the current output terminal. With no argument, it reports the current settings of the options. The option strings are selected from the following set: even allow even parity -even disallow even parity odd allow odd parity -odd disallow odd parity raw raw mode input (no erase, kill, interrupt, quit, EOT; parity bit passed back) -raw negate raw mode cooked same as `-raw' cbreak make each character available to read(2) as received; no erase and kill -cbreak make characters available to read only when newline is received -nl allow carriage return for new-line, and output CR-LF for carriage return or new-line nl accept only new-line to end lines echo echo back every character typed -echo do not echo characters lcase map upper case to lower case -lcase do not map case -tabs replace tabs by spaces when printing tabs preserve tabs ek reset erase and kill characters back to normal # and @ erase c set erase character to c. C can be of the form `^X' which is interpreted as a `control X'. kill c set kill character to c. `^X' works here also. cr0 cr1 cr2 cr3 select style of delay for carriage return (see ioctl(2)) nl0 nl1 nl2 nl3 select style of delay for linefeed tab0 tab1 tab2 tab3 select style of delay for tab ff0 ff1 select style of delay for form feed bs0 bs1 select style of delay for backspace tty33 set all modes suitable for the Teletype Corporation Model 33 terminal. tty37 set all modes suitable for the Teletype Corporation Model 37 terminal. vt05 set all modes suitable for Digital Equipment Corp. VT05 terminal tn300 set all modes suitable for a General Electric TermiNet 300 ti700 set all modes suitable for Texas Instruments 700 series terminal tek set all modes suitable for Tektronix 4014 terminal hup hang up dataphone on last close. -hup do not hang up dataphone on last close. 0 hang up phone line immediately 50 75 110 134 150 200 300 600 1200 1800 2400 4800 9600 exta extb Set terminal baud rate to the number given, if possible. (These are the speeds supported by the DH-11 interface). SEE ALSO
ioctl(2), tabs(1) STTY(1)
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