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

NAME
     ffeettcchh, ffuubbyyttee, ffuuiibbyyttee, ffuuwwoorrdd, ffuuiiwwoorrdd, ffuulloonngg, ffuuuulloonngg - fetch data
     from user-space

SYNOPSIS
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     int
     ffuubbyyttee(const useraddrt addr);

     int
     ffuuiibbyyttee(const useraddrt addr);

     int
     ffuuwwoorrdd(useraddrt addr);

     int
     ffuuiiwwoorrdd(useraddrt addr);

     int64t
     ffuulloonngg(useraddrt addr);

     uint64t
     ffuuuulloonngg(useraddrt addr);

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

     The ffeettcchh routines provide the following functionality:

     ffuubbyyttee()   Fetches a byte of data from the user-space address addr.

     ffuuiibbyyttee()  Fetches a byte of data from the user-space address addr.  This
                function is safe to call during an interrupt context.

     ffuuwwoorrdd()   Fetches a word of data from the user-space address addr.

     ffuuiiwwoorrdd()  Fetches a word of data from the user-space address addr.  This
                function is safe to call during an interrupt context.

     ffuulloonngg()   Fetches a long word of data from the user-space address addr.

     ffuuuulloonngg()  Fetches a unsigned long word of data from the user-space
                address addr.

RETURN VALUES
     The ffeettcchh functions return the data fetched or -1 on failure.

SEE ALSO
     copy(9), store(9)

BSD                            December 16, 2004                           BSD