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From: t.d.g.sandford@prds-grn.demon.co.uk (Thomas D.G. Sandford)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: ioperm call on FreeBSD?
Date: 30 Dec 1995 23:18:46 GMT
Organization: Paradise Green Technical Services
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Message-ID: <4c4hcm$ur@prds-grn.demon.co.uk>
References: <DKEMoG.C19@midway.uchicago.edu> <4c49he$f8v@uriah.heep.sax.de>
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J Wunsch (j@uriah.heep.sax.de) wrote:
: Tim Pierce <twpierce@midway.uchicago.edu> writes:
: > There is apparently a Linux `ioperm' system call that is used to
: > set permissions on various I/O ports..........
:
: .............
:
: The only way on FreeBSD is to open /dev/io, which will grant the
: process access to any and all IO registers (the permissions of /dev/io
: should be fairly restrictive, in order to prevent abusing it). Be
: careful with your application, triple-check that all IO accesses are
: to the intented ports.
: .............
Is there any documentation on how to use /dev/io ? - I can't find a man
page anywhere.
--
Thomas Sandford | t.d.g.sandford@prds-grn.demon.co.uk
Paradise Green Technical Services: Software/Hardware Design
and Theatre Technical Services