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FETCH(9)
FETCH(9) FreeBSD Kernel Developer's Manual FETCH(9)

NAME

fetch, fubyte, fuswintr, fuword, fuword16, fuword32, fuword64fetch data from user-space

SYNOPSIS

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

int
fubyte( const void *base);

long
fuword( const void *base);

int
fuword16( void *base);

int32_t
fuword32( const void *base);

int64_t
fuword64( const void *base);

#include < sys/resourcevar.h>

int
fuswintr( 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.
fuword()
Fetches a word of data from the user-space address base.
fuword16()
Fetches 16 bits of data from the user-space address base.
fuword32()
Fetches 32 bits of data from the user-space address base.
fuword64()
Fetches 64 bits 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.

RETURN VALUES

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

SEE ALSO

copy(9), store(9)
October 5, 2009 FreeBSD