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From: Steve Jorgensen <steve AT khoral DOT com>
Message-Id: <199910210615.AAA20389@zen.alb.khoral.com>
Subject: Mmap problem
To: cygwin AT sourceware DOT cygnus DOT com
Date: Thu, 21 Oct 1999 00:15:29 -0600 (MDT)
X-Mailer: ELM [version 2.4 PL25]
Content-Type: text


	I'm trying to port Khoros Pro 2001 to NT using cygwin, and
	am having a problem with the mmap call.

	Khoros has a transport abstraction that makes using mmap, tcpip,
	file, pipes, or memory all look like a standard unix file, allowing
	users to use our k* file i/o calls to read and write to each
	different kind of transport.  Anyway, the mmap transport, in order
	to avoid excessive resizing, forces the underlying mmap'ed file
	to grow more than the write call needs.  At close time, we
	ftruncate the file back to the size it's supposed to be.  The
	problem is that ftruncate is returning with an access error.
	This works on all the unix systems we've ported to.  

	I've tried the ftruncate both before and after the munmap call
	with the same results.  Any ideas what else I can try, or am I
	just out of luck?

	I'm using Cygwin1.0 on a Windows NT 4.0 box.

	Thanks for any help.

					Steve

-- 
-----------------------------------------------------------
Steven Jorgensen      steve AT khoral DOT com	    steve AT haunt DOT com
------------------------------+----------------------------
Khoral Research Inc.          | PHONE: (505) 837-6500
6200 Uptown Blvd, Suite 200   | FAX:   (505) 881-3842
Albuquerque, NM 87110         | URL: http://www.khoral.com/
-----------------------------------------------------------

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