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Date: Thu, 29 Dec 1994 20:52:55 +0800 (HKT)
From: John Beukema <jbeukema@HK.Super.NET>
To: dufault@hda.com
Cc: FreeBSD-questions <FreeBSD-questions@freefall.cdrom.com>
Subject: kbhit()
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In view of the interest in this question, I am enclosing a very simple 
and elegant solution to the problem sent by Peter Dufault which works 
fine in all tty modes.

Thanks to all who responded.
jbeukema

#include <stdio.h>
#include <sgtty.h>

int kbhit(void)
{
    int n;
    if (ioctl(fileno(stdin), FIONREAD, &n) == -1)
        n = 0;
    return n != 0;
}

Peter

-- 
Peter Dufault               Real Time Machine Control and Simulation
HD Associates, Inc.         Voice: 508 433 6936
dufault@hda.com             Fax:   508 433 5267
++++ Formerly hd@world.std.com.  E-mail problems? Tell hdslip@iii.net