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);
DESCRIPTION¶
The
i386_get_ioperm
() system call 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.
The
i386_set_ioperm
() system call will set
access to a range of I/O ports described by the
start and
length arguments to the state specified by
the
enable argument.
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.
ERRORS¶
The
i386_get_ioperm
() and
i386_set_ioperm
() system calls 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 ALSO¶
io(4)
AUTHORS¶
This man page was written by
Jonathan
Lemon.