Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!snorkelwacker!mit-eddie!aryeh
From: aryeh@eddie.mit.edu (Aryeh M. Weiss)
Newsgroups: comp.unix.xenix
Subject: Re: FIORDCHK
Message-ID: <1990Jan15.213423.26292@eddie.mit.edu>
Date: 15 Jan 90 21:34:23 GMT
References: <4587@questar.QUESTAR.MN.ORG>
Reply-To: aryeh@eddie.MIT.EDU (Aryeh M. Weiss)
Organization: MIT EE/CS Computer Facilities, Cambridge, MA
Lines: 16

In article <4587@questar.QUESTAR.MN.ORG> jeff@questar.UUCP (Jeff Holmes) writes:
>...
>	In /usr/include/term.h there is a comment about modification
>	history dated MAR 18,1988 and the comment...
>
>	   ...added XENIX FIORDCHK as alternative to BSD FIONREAD...
>
>	So i tried x = ioctl(0, FIORDCHK, &n) and noticed that "n"
>	did NOT change but the return value from ioctl was 1 on
>	a function key press and 0 for anything that returned a single
>	character.
>
See the SCO function rdchk(S).  Rdchk(S) returns 1 if there is data to
be read from the tty.  FIORDCHK sounds like it is the ioctl interface to
the same function or else rdchk is a wrapper function for this ioctl call.
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