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Re: [gforth] problem with gforth7 and serial access

From: David Kuehling
Subject: Re: [gforth] problem with gforth7 and serial access
Date: Thu, 22 Mar 2012 16:44:53 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

>>>>> "Bernd" == Bernd Paysan <address@hidden> writes:

> I don't know why the select code should not work on serial lines, this
> must be a bug in Linux.

Sure, that this is not a bug in Gforth code?  Select() is pretty
difficult to get right.  E.g. you must read all input data until read()
returns EAGAIN, before calling select().  Failing to do so will make
select() block forever, as select is "edge triggered", and only returns
if the state of "data available" has a transition.


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