_write is a version of write designed
to operate only on HFS files. _write runs faster and calls
fewer other library routines than write. Refer to write
for a full description.
_write is used exactly like the standard write
function. The first argument to _write must be the file
descriptor for an open HFS file.
Copyright (c) 1998 SAS Institute Inc. Cary, NC, USA. All rights reserved.