i386_get_ioperm, i386_set_ioperm — manage per-process access to the i386 I/O port space

This man page was written by Jonathan Lemon. Debian July 27, 1998 I386_GET_IOPERM(2)

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.

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.

Standard C Library (libc, -lc)

i386_get_ioperm, i386_set_ioperm — manage per-process access to the i386 I/O port space

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.

io(4)

#include<machine/sysarch.h>inti386_get_ioperm(unsignedintstart, unsignedint*length, int*enable); inti386_set_ioperm(unsignedintstart, unsignedintlength, intenable);