FETCH(9) MidnightBSD Kernel Developer’s Manual FETCH(9)

NAME

fetch, fubyte, fusword, fuswintr, fuword — fetch data from user-space

SYNOPSIS

#include <sys/types.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>

int

fubyte(const void *base);

int

fusword(void *base);

int

fuswintr(void *base);

long

fuword(const void *base);

DESCRIPTION

The fetch functions are designed to copy small amounts of data from user-space.

The fetch routines provide the following functionality:

fubyte()

Fetches a byte of data from the user-space address base.

fusword()

Fetches a short word of data from the user-space address base.

fuswintr()

Fetches a short word of data from the user-space address base. This function is safe to call during an interrupt context.

fuword()

Fetches a word of data from the user-space address base.

RETURN VALUES

The fetch functions return the data fetched or -1 on failure.

SEE ALSO

copy(9), store(9)

MidnightBSD 0.3 January 7, 1996 MidnightBSD 0.3