archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 14:54:52 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8325382: (fc) FileChannel.transferTo throws IOException when position equals size

Browse source 
Reviewed-by: alanb
This commit is contained in:
Brian Burkhalter 2024-02-13 15:53:29 +00:00
parent 13d9e8ff38
commit 6b7c9718d6
2 changed files with 41 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

22
src/java.base/share/classes/sun/nio/ch/FileChannelImpl.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -857,20 +857,18 @@ public class FileChannelImpl
if (position > sz)
return 0;
// Now position <= sz so remaining >= 0 and
// remaining == 0 if and only if sz == 0
long remaining = sz - position;
// Adjust count only if remaining > 0, i.e.,
// sz > position which means sz > 0
if (remaining > 0 && remaining < count)
count = remaining;
// System calls supporting fast transfers might not work on files
// which advertise zero size such as those in Linux /proc
if (sz > 0) {
// Attempt a direct transfer, if the kernel supports it, limiting
// the number of bytes according to which platform
// Now sz > 0 and position <= sz so remaining >= 0 and
// remaining == 0 if and only if sz == position
long remaining = sz - position;
if (remaining >= 0 && remaining < count)
count = remaining;
// Attempt a direct transfer, if the kernel supports it,
// limiting the number of bytes according to which platform
int icount = (int) Math.min(count, nd.maxDirectTransferSize());
long n;
if ((n = transferToDirect(position, icount, target)) >= 0)