From:	Steve Charters <charters AT ferndown DOT tt DOT slb DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Blocking Read Problem with DJGPP
Date:	Tue, 8 Sep 1998 09:22:42 +0100
Organization:	Schlumberger SINet, London, England
Lines:	26
Message-ID:	<Pine.SUN.3.96.980908091624.795A-100000@alpha>
NNTP-Posting-Host:	alpha.ferndown.ate.slb.com
Mime-Version:	1.0
cc:	Steve Charters <charters AT ferndown DOT tt DOT slb DOT com>
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi,

Can anyone help me with this. 

I have a program which reads and write to the serial port. The reads and
writes should be non-blocking, so I use

    fd = open(name, O_RDWR | O_NONBLOCK);

Under UNIX on a Sun Sparc compiled with gcc this works fine but when I 
ported to PC with DJGPP and using COM2 I find that the reads block, and my
utility hangs.

Anyone got any ideas why this is and a possible work around.

Thanks,

Steve

-------------------------------------------------------------------------------
Steve Charters                           Ferndown Industrial Estate
Ferndown Product Development Centre      Wimborne
Schlumberger ATE                         Dorset
charters AT ferndown DOT tt DOT slb DOT com             BH21 7PP
Tel. +44 (0)1202 850833                  England

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