RandomAccessFile and 1.4

Greg Lewis glewis at eyesbeyond.com
Wed Jul 21 07:43:48 PDT 2004


On Wed, Jul 21, 2004 at 01:19:05PM +0200, Manfred Riem wrote:
> I've been trying to use the following code snippet using a RandomAccessFile.
> 
>   RandomAccessFile rfile = new RandomAccessFile( file, "rws" );
>   rfile.write( byte );
> 
> The current version of the J2SDK 1.4 throws a FileNotFoundException, while
> the
> Windows accepts it without any problems. 
> 
> Anyone a suggestion, besides dropping the 's' flag? I want to be sure 
> the changes have been written to the underlying storage before continuing.

D'oh.  This is a bug in the port.  I'm trying the attached patch but it
will take a couple hours to compile, etc.  The problem was that FreeBSD
doesn't define O_SYNC and O_DSYNC (neither on 4.x and only O_SYNC on 5.x)
so the code was defining O_SYNC as 0x800, which happens to be O_EXCL on
FreeBSD...

-- 
Greg Lewis                          Email   : glewis at eyesbeyond.com
Eyes Beyond                         Web     : http://www.eyesbeyond.com
Information Technology              FreeBSD : glewis at FreeBSD.org
-------------- next part --------------
--- ../../j2se/src/share/native/java/io/io_util.h.orig	Wed Jul 21 08:32:49 2004
+++ ../../j2se/src/share/native/java/io/io_util.h	Wed Jul 21 08:37:54 2004
@@ -10,7 +10,15 @@
 
 extern jfieldID IO_fd_fdID;
 
-#if !defined(O_DSYNC) || !defined(O_SYNC)
+#ifdef _BSD_SOURCE
+#include <fcntl.h>
+#ifndef O_SYNC
+#define O_SYNC	O_FSYNC
+#endif
+#ifndef O_DSYNC
+#define O_DSYNC	O_FSYNC
+#endif
+#elif !defined(O_DSYNC) || !defined(O_SYNC)
 #define O_SYNC  (0x0800)
 #define O_DSYNC (0x2000)
 #endif


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