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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.
      The fetch functions return the data fetched or -1 on failure.
      copy(9), store(9)