Path: utzoo!mnetor!uunet!husc6!purdue!gatech!galbp!phil
From: phil@galbp.LBP.HARRIS.COM (Phil McDonald)
Newsgroups: comp.lang.c
Subject: Re: keypressed()
Message-ID: <3961@galbp.LBP.HARRIS.COM>
Date: 22 Feb 88 17:02:25 GMT
References: <136@forty2.UUCP>
Reply-To: phil@galbp.UUCP (Phil McDonald)
Organization: Harris/Lanier, Atlanta, GA
Lines: 25

In article <136@forty2.UUCP> eschle@forty2.UUCP (Patrik Eschle) writes:
>How do I write a function keypressed(), that returns 0 if no
>char is in the input queue and returns the character otherwise?
>Keypressed() should not block, and should leave the terminal in its
>initial state after returning.
>
>I can't use curses and have played around with ioctl, but its
>really slow.
>
>Any suggestions?                   Patrik 

===========================================================================
I would suggest using the rdchk(s) command.

Keypressed()
{
char	c;

	if (rdchk(stdin) > 0) {
		read(stdin, &c, sizeof(char));
		return(c);
	}
	else
		return(0);
}