1.\" Copyright (c) 1998 Jonathan Lemon 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.Dd July 27, 1998 26.Dt I386_GET_IOPERM 2 27.Os 28.Sh NAME 29.Nm i386_get_ioperm , 30.Nm i386_set_ioperm 31.Nd manage per-process access to the i386 I/O port space 32.Sh LIBRARY 33.Lb libc 34.Sh SYNOPSIS 35.In machine/sysarch.h 36.Ft int 37.Fn i386_get_ioperm "unsigned int start" "unsigned int *length" "int *enable" 38.Ft int 39.Fn i386_set_ioperm "unsigned int start" "unsigned int length" "int enable" 40.Sh DESCRIPTION 41The 42.Fn i386_get_ioperm 43system call 44will return the permission for the process' I/O port space in the 45.Fa *enable 46argument. 47The port range starts at 48.Fa start 49and the number of contiguous entries will be returned in 50.Fa *length . 51.Pp 52The 53.Fn i386_set_ioperm 54system call 55will set access to a range of I/O ports described by the 56.Fa start 57and 58.Fa length 59arguments to the state specified by the 60.Fa enable 61argument. 62.Sh RETURN VALUES 63.Rv -std 64.Sh ERRORS 65The 66.Fn i386_get_ioperm 67and 68.Fn i386_set_ioperm 69system calls 70will fail if: 71.Bl -tag -width Er 72.It Bq Er EINVAL 73An invalid range was specified by the 74.Fa start 75or 76.Fa length 77arguments. 78.It Bq Er EPERM 79The caller of i386_set_ioperm was not the superuser. 80.El 81.Sh SEE ALSO 82.Xr io 4 83.Sh AUTHORS 84This man page was written by 85.An Jonathan Lemon . 86