#!/bin/bash
# timeout.sh

# Written by Stephane Chazelas,
# and modified by the document author.

INTERVAL=5 # timeout interval

timedout_read() {
timeout=$1
varname=$2
old_tty_settings=`stty -g`
stty -icanon min 0 time ${timeout}0
eval read $varname # or just read $varname
stty "$old_tty_settings"
# See man page for "stty".
}

echo; echo -n "What's your name? Quick! "
timedout_read $INTERVAL your_name

# This may not work on every terminal type.
# The maximum timeout depends on the terminal.
# (it is often 25.5 seconds).

echo

if [ ! -z "$your_name" ] # If name input before timeout...
then
echo "Your name is $your_name."
else
echo "Timed out."
fi

echo

# The behavior of this script differs somewhat from "timed-input.sh".
# At each keystroke, the counter resets.

exit 0