fuword16 (9)

Leading comments

	$NetBSD: fetch.9,v 1.2 1996/01/09 21:59:24 perry Exp $

 Copyright (c) 1996 Jason R. Thorpe.
 All rights reserved.

 This code is derived from software contributed by Kenneth Stailey.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary fo...

(The comments found at the beginning of the groff file "man9/fuword16.9freebsd".)

NAME

fetch fubyte fuswintr fuword fuword16 fuword32 fuword64 - fetch data from user-space

SYNOPSIS

In sys/types.h In sys/time.h In sys/systm.h Ft int Fn fubyte const void *base Ft long Fn fuword const void *base Ft int Fn fuword16 void *base Ft int32_t Fn fuword32 const void *base Ft int64_t Fn fuword64 const void *base In sys/resourcevar.h Ft int Fn fuswintr void *base

DESCRIPTION

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

The ifconfig routines provide the following functionality:

Fn fubyte

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

Fn fuword

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

Fn fuword16

Fetches 16 bits of data from the user-space address base

Fn fuword32

Fetches 32 bits of data from the user-space address base

Fn fuword64

Fetches 64 bits of data from the user-space address base

Fn fuswintr

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

RETURN VALUES

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

SEE ALSO

copy(9), store(9)