From owner-freebsd-questions  Thu Jan 16  6:48:48 2003
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Date: Thu, 16 Jan 2003 16:48:18 +0200
From: Giorgos Keramidas <keramida@ceid.upatras.gr>
To: Paul Hamilton <paul@computerwest.com.au>
Cc: freebsd-questions@FreeBSD.ORG
Subject: Re: How do I monitor the serial CTS line via C programmatically?
Message-ID: <20030116144818.GA5678@gothmog.gr>
References: <20030115112042.GA26041@gothmog.gr> <AGEHIFHGNEMPFNCPLONMIENIEBAA.paul@compwest.com.au>
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On 2003-01-16 15:44, Paul Hamilton <paul@computerwest.com.au> wrote:
> Thanks Giorgos!
>
> I needed to know the function used to access the Serial ports under FreeBSD.
> Your program compiles, but generates the following error msg when run:
>
> test_prog: ioctl: Inappropriate ioctl for device
>
> Thanks to the ioctl 'tip', I researched around, and found that the
> serial port needed opening, so this is the finished code (just in
> case someone else needs it):

Ah, of course.  When I tested it, I used:

	% ./a.out < /dev/cuaa1

so the shell did the open() for me :)

You're right, of course...

>     [snip C source]


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