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read command in shell script

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# 8  
Old 02-19-2009
hi,


its getting sleep for only 18 seconds not 180 seconds. please help

$cat get.sh
## USAGE: get_key VAR [SECS]
## SECS defaults to 5
get_key()
{
if [ -t 0 ]
then
_STTY=`stty -g`
stty -icanon min 0 time ${2:-$(( 10 * ${2:-5}))} -echo
fi
_KEY=`dd bs=1 count=1 2>/dev/null`
[ -n "$_STTY" ] && stty "$_STTY"
[ -n "$1" ] && eval "$1=\$_KEY"
return 0
}

get_key VAR 180
echo $VAR


$date;sh get.sh ;date
Thu Feb 19 10:23:32 IST 2009

Thu Feb 19 10:23:50 IST 2009
$
# 9  
Old 02-19-2009

Sorry; that should be:

Code:
stty -icanon min 0 time $(( 10 * ${2:-5})) -echo

# 10  
Old 02-22-2009
Quote:
Originally Posted by cfajohnson
Sorry; that should be:

Code:
stty -icanon min 0 time $(( 10 * ${2:-5})) -echo



now it is comming with in second.

$date;sh get.sh ;date
Sun Feb 22 22:54:26 IST 2009

Sun Feb 22 22:54:27 IST 2009
$
# 11  
Old 02-24-2009

I just discovered that the maximum value for the argument to time is 255.

To use something larger, put it in a loop with a smaller value.
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