fubyte man page on OpenDarwin

fubyte man page on OpenDarwin

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FETCH(9)		 BSD 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 con‐
		 text.

     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)

BSD				January 7, 1996				   BSD

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