Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!mailrus!tut.cis.ohio-state.edu!bloom-beacon!bu-cs!eap
From: eap@bu-cs.BU.EDU (Eric Pearce)
Newsgroups: comp.unix.questions
Subject: Re: help needed with signal(2)
Message-ID: <22764@bu-cs.BU.EDU>
Date: 20 May 88 14:27:01 GMT
References: <660@amethyst.ma.arizona.edu>
Reply-To: eap@bu-it.bu.edu (Eric Pearce)
Followup-To: comp.unix.questions
Distribution: na
Organization: BD&HR (Beer Drinkers & Hell Raisers)
Lines: 27

In article <660@amethyst.ma.arizona.edu> eros!barsam@arizona.edu says:
>I have a C program that runs continuously. I would like
>to get its attention by hitting the <return> key. I can do
>it using signal(2) with SIGINT or SIGQUIT but I don't want
>to use interrupt or quit, and I couldn't figure out how to
>do it with <return>. Any help (preferably with e-mail) would
>be greatly appreciated.

If you are using BSD, why don't you use this instead:

#include <sys/ioctl.h>

int count;

 for (;;) {                      /* endless loop */
     ioctl(0,FIONREAD,&count);  
     if (count) { 
                     /* key was pressed */
                }
     else {
                /* nothing happened */
          }
 }

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