1998-07-28 03:39:04 +00:00
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.\" Copyright (c) 1998 Jonathan Lemon
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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1999-08-28 00:22:10 +00:00
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.\" $FreeBSD$
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1998-07-28 03:39:04 +00:00
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.\"
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.Dd July 27, 1998
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.Os
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.Dt I386_GET_IOPERM 2
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.Sh NAME
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.Nm i386_get_ioperm ,
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.Nm i386_set_ioperm
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.Nd manage per-process access to the i386 I/O port space
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2000-04-21 09:42:15 +00:00
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.Sh LIBRARY
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.Lb libc
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1998-07-28 03:39:04 +00:00
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.Sh SYNOPSIS
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.Fd #include <machine/sysarch.h>
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.Ft int
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1998-07-28 15:22:51 +00:00
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.Fn i386_get_ioperm "unsigned int start" "unsigned int *length" "int *enable"
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1998-07-28 03:39:04 +00:00
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.Ft int
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1998-07-28 15:22:51 +00:00
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.Fn i386_set_ioperm "unsigned int start" "unsigned int length" "int enable"
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1998-07-28 03:39:04 +00:00
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.Sh DESCRIPTION
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.Fn i386_get_ioperm
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will return the permission for the process' I/O port space in the
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.Fa *enable
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argument. The port range starts at
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.Fa start
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and the number of contiguous entries will be returned in
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.Fa *length .
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.Pp
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.Fn i386_set_ioperm
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will set access to a range of I/O ports described by the
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.Fa start
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and
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.Fa length
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arguments to the state specified by the
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.Fa enable
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argument.
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.Sh RETURN VALUES
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Upon successful completion,
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.Fn i386_get_ioperm
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and
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.Fn i386_set_ioperm
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return the value of 0.
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Otherwise, a value of -1 is returned and the global
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variable
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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.Fn i386_get_ioperm
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and
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.Fn i386_set_ioperm
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will fail if:
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2000-05-06 12:07:59 +00:00
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.Bl -tag -width Er
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1998-07-28 03:39:04 +00:00
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.It Bq Er EINVAL
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An invalid range was specified by the
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.Fa start
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or
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.Fa length
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arguments.
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.It Bq Er EPERM
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The caller of i386_set_ioperm was not the superuser.
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.El
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.Sh AUTHORS
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This man page was written by
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.An Jonathan Lemon .
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