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From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.unix.questions
Subject: Re: Check input buffer in C
Message-ID: <13006@smoke.BRL.MIL>
Date: 27 May 90 04:48:50 GMT
References: <1990May26.144958.4395@aucs.uucp>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 15

In article <1990May26.144958.4395@aucs.uucp> 852028e@aucs.UUCP (Amari  M.  Elammari) writes:
> Is there a UNIX C (sun4 C) function that checks if the input buffer 
> is empty???
>What I want to do is to check the buffer, if there are some
>characters in the buffer then read them; otherwise continue
>with the next statement.

To which "input buffer" do you refer?  There are several different
kinds of "input buffer" possible for a UNIX C program.  If your
program maintains its own buffer, it should be able to test it;
the stdio buffer is not worth testing, because of the way stdio
uses it; kernel disk block buffers are also not worth testing;
streams can be tested with select() or poll(); under some
circumstances the terminal handler MIN & TIME parameters might be
appropriate.