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From: boyd@necisa.ho.necisa.oz.au (Boyd Roberts)
Newsgroups: comp.unix.internals
Subject: Re: How to distinguish between STREAMS and non-STREAMS
Keywords: STREAMS tty character-special
Message-ID: <2003@necisa.ho.necisa.oz.au>
Date: 31 Jan 91 03:19:31 GMT
References: <josef.663420838@ugum01> <dcm.663952404@baldur>
Organization: NEC Information Systems Australia Pty. Ltd.
Lines: 16

josef@nixpbe.nixdorf.de (josef Moellers) writes:
>
>Does anybody now of a bulletproof and FAST method to distinguish between
>a STREAMS fd and a non-STREAMS fd?
>I cannot use calls to getmsg/putmsg, as I am not allowed to change the
>state of the STREAM.
>

Why not do a putmsg() with an invalid pointer to the message? -- gag.

EFAULT tells you that it's a stream.


Boyd Roberts			boyd@necisa.ho.necisa.oz.au

``When the going gets wierd, the weird turn pro...''