NAME    [Toc]    [Back]

       fubyte - General: Returns a byte from user address space

SYNOPSIS    [Toc]    [Back]

       int fubyte(
               char *user_src );

ARGUMENTS    [Toc]    [Back]

       Specifies the address in user space from which to read the
       byte.

DESCRIPTION    [Toc]    [Back]

       The fubyte routine returns 1  byte  from  the  unprotected
       user address space to the calling program.

NOTES    [Toc]    [Back]

       If the size of the return value is larger than 1 byte, the
       byte actually used for the return value is  implementation
       defined.

RETURN VALUES    [Toc]    [Back]

       Upon successful completion, fubyte returns a value greater
       than 0 (zero). Otherwise, it returns -1,  indicating  that
       the user address specified in user_src cannot be accessed.

SEE ALSO    [Toc]    [Back]

       Routines:    copyinstr(9r),    fuword(9r),     subyte(9r),
       suword(9r)



                                                       fubyte(9r)