Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!elroy.jpl.nasa.gov!decwrl!mcnc!duke!sam.cs.olemiss.edu!dave
From: dave@sam.cs.olemiss.edu (David E. Johnson)
Newsgroups: comp.unix.internals
Subject: Standalone driver question
Message-ID: <1991Jan26.191859.14609@cs.olemiss.edu>
Date: 26 Jan 91 19:18:59 GMT
Sender: dave@cs.olemiss.edu (David E. Johnson)
Organization: University of Mississippi, Dept. of Computer Science
Lines: 33

Is a standalone driver required to handle requests whose character
count is not a multiple of the block size?  In other words, is the
driver responsible for extracting the character count of bytes out of
a full block to place in the user buffer or should this be done by a
higher level routine?

In the standalone drivers I have seen, they seem to use the character
count in the transfer, however, since the driver must deal with blocks
of a set size it would seem to me that it should be done at a higher
level. The user code calling the drivers normally wants a set amount
of bytes and does not allocate a structure of block size therefore I
assume that it *must* be handled somewhere.

Any information about buffer handling in standalone I/O routines would
be helpful.  Many thanks...


David E. Johnson
Department of Computer Science ** Title:	Systems Programmer
The University of Mississippi  ** Telephone:	(601) 232-7396
336 Weir Hall                  ** Internet:	dave@cs.olemiss.edu
University, MS  38677          **






-- 
David E. Johnson
Department of Computer Science ** Title:	Systems Programmer
The University of Mississippi  ** Telephone:	(601) 232-7396
336 Weir Hall                  ** Internet:	dave@cs.olemiss.edu