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Date: Wed, 3 May 1995 15:45:22 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199505030545.PAA28631@godzilla.zeta.org.au>
To: dufault@hda.com, hackers@FreeBSD.org
Subject: Re: what's in ioctl flag arg?
Sender: hackers-owner@FreeBSD.org
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>What's in the ioctl flag arg?  I hope it is a copy of the
>flag passed in to the open(), but I can't find where it gets
>set up and I'm not sure if it gets translated into an "F_"
>thing instead.

It gets translated.

>Is this how I verify that you can't write to a file in the ioctl call:

>(flag & O_ACCMODE) == O_RDONLY

No, use !(flags & FWRITE).

Bruce