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From: davidsen@sungod.crd.ge.com (William Davidsen)
Newsgroups: comp.unix.wizards
Subject: Re: Checking an fd for pending data (sans select(3))
Message-ID: <1456@crdgw1.crd.ge.com>
Date: 2 Aug 89 18:26:57 GMT
References: <11727@cgl.ucsf.EDU> <4001@cps3xx.UUCP> <14779@dartvax.Dartmouth.EDU>
Sender: news@crdgw1.crd.ge.com
Reply-To: davidsen@crdos1.UUCP (bill davidsen)
Organization: General Electric Corp. R&D, Schenectady, NY
Lines: 20


  The name for the procedure which tells you if a key has been pressed
is usually kbhit(), and what you need is fkbhit() I guess. In SysV you
can set the read to timeout with an ioctl. The values to set are in the
control structure. Here's a code fragment (you want to modify it).

	ioctl(0, TCGETA, &otermio);	/* save old settings */
	ntermio.c_iflag = 0;		/* setup new settings */
	ntermio.c_oflag = 0;
	ntermio.c_cflag = otermio.c_cflag;
	ntermio.c_lflag = 0;
	ntermio.c_line = otermio.c_line;
	ntermio.c_cc[VMIN] = 1;
	ntermio.c_cc[VTIME] = 0;
	ioctl(0, TCSETAW, &ntermio);	/* and activate them */

Good luck.
	bill davidsen		(davidsen@crdos1.crd.GE.COM)
  {uunet | philabs}!crdgw1!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me