READ(2)

NAME
ioperm — set port input/output permissions

SYNOPSIS
#include <unistd.h>

int ioperm(unsigned long __from, unsigned long __num, int __turn_on);

DESCRIPTION
Ioperm sets the port access permission bits for the process for __num bytes starting from port address __from to the value __turn_on. The usage of re root privileges.

WARNINGS
This system call is Linux specific.