Date: Tue, 8 Apr 2003 23:49:44 +0400 From: "Andrey A. Chernov" <ache@nagual.pp.ru> To: Bruce Evans <bde@zeta.org.au> Cc: Yar Tikhiy <yar@freebsd.org> Subject: Re: termios & non-blocking I/O Message-ID: <20030408194944.GA43822@nagual.pp.ru> In-Reply-To: <20030409044301.J628@gamplex.bde.org> References: <20030408164614.GA7236@comp.chem.msu.su> <20030409044301.J628@gamplex.bde.org>
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On Wed, Apr 09, 2003 at 05:33:28 +1000, Bruce Evans wrote: > The spec is not very clear, but I think it means to say to return > -1/EAGAIN (it says that first). POSIX says: IEEE Std 1003.1-200x does not specify whether the setting of O_NONBLOCK takes precedence over MIN or TIME settings. Therefore, if O_NONBLOCK is set, read( ) may return immediately, regardless of the setting of MIN or TIME. Also, if no data is available, read( ) may either return 0, or return -1 with errno set to [EAGAIN]. -- Andrey A. Chernov http://ache.pp.ru/
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