I386_GET_IOPERM(2) BSD System Calls Manual I386_GET_IOPERM(2)NAME
i386_get_ioperm, i386_set_ioperm — manage per-process access to the i386
I/O port space
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <machine/sysarch.h>
int
i386_get_ioperm(unsigned int start, unsigned int *length, int *enable);
int
i386_set_ioperm(unsigned int start, unsigned int length, int enable);
DESCRIPTIONi386_get_ioperm() will return the permission for the process' I/O port
space in the *enable argument. The port range starts at start and the
number of contiguous entries will be returned in *length.
i386_set_ioperm() will set access to a range of I/O ports described by
the start and length arguments to the state specified by the enable argu‐
ment.
RETURN VALUES
Upon successful completion, the value 0 is returned; otherwise the
value -1 is returned and the global variable errno is set to indicate the
error.
ERRORSi386_get_ioperm() and i386_set_ioperm() will fail if:
[EINVAL] An invalid range was specified by the start or length
arguments.
[EPERM] The caller of i386_set_ioperm() was not the superuser.
SEE ALSOio(4)AUTHORS
This man page was written by Jonathan Lemon.
BSD July 27, 1998 BSD