NAME    [Toc]    [Back]

       subyte - General: Writes a byte into user address space

SYNOPSIS    [Toc]    [Back]

       int subyte(
               char *user_dest,
               char byte );

ARGUMENTS    [Toc]    [Back]

       Specifies  the  address  in  user space to write the byte.
       Specifies the byte to be written.

DESCRIPTION    [Toc]    [Back]

       The subyte routine copies 1 byte from the protected kernel
       address space to the unprotected user address space.

RETURN VALUES    [Toc]    [Back]

       Upon  successful  completion,  subyte  returns the value 0
       (zero).  Otherwise, it returns a -1, indicating  that  the
       user address specified in user_dest could not be accessed.

SEE ALSO    [Toc]    [Back]

       Routines:   copyout(9r),    copyoutstr(9r),    fubyte(9r),
       fuword(9r), suword(9r)



                                                       subyte(9r)