From 94b4ed5766381fdb922f9aaba02201a7fb735cb3 Mon Sep 17 00:00:00 2001
From: Brian Burkhalter <bpb@openjdk.org>
Date: Tue, 12 Mar 2024 18:06:45 +0000
Subject: [PATCH] 8327096: (fc) java/nio/channels/FileChannel/Size.java fails
 on partition incapable of creating large files

Reviewed-by: djelinski
---
 .../java/nio/channels/FileChannel/Size.java    | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/test/jdk/java/nio/channels/FileChannel/Size.java b/test/jdk/java/nio/channels/FileChannel/Size.java
index fd6e744f03f..2db86a8089e 100644
--- a/test/jdk/java/nio/channels/FileChannel/Size.java
+++ b/test/jdk/java/nio/channels/FileChannel/Size.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2013, 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
@@ -24,6 +24,7 @@
 /* @test
  * @bug 4563125
  * @summary Test size method of FileChannel
+ * @library /test/lib
  * @run main/othervm Size
  * @key randomness
  */
@@ -31,8 +32,10 @@
 import java.io.*;
 import java.nio.MappedByteBuffer;
 import java.nio.channels.*;
+import java.nio.file.FileStore;
+import java.nio.file.Path;
 import java.util.Random;
-
+import jtreg.SkippedException;
 
 /**
  * Testing FileChannel's size method.
@@ -65,6 +68,8 @@ public class Size {
     // Test for bug 4563125
     private static void testLargeFile() throws Exception {
         File largeFile = new File("largeFileTest");
+        largeFile.deleteOnExit();
+
         long testSize = ((long)Integer.MAX_VALUE) * 2;
         initTestFile(largeFile, 10);
         try (FileChannel fc = new RandomAccessFile(largeFile, "rw").getChannel()) {
@@ -75,8 +80,15 @@ public class Size {
                                          + "Expect size " + (testSize + 10)
                                          + ", actual size " + fc.size());
             }
+        } catch (IOException ioe) {
+            if ("File too large".equals(ioe.getMessage())) {
+                Path p = largeFile.toPath();
+                FileStore store = p.getFileSystem().provider().getFileStore(p);
+                if ("msdos".equals(store.type()))
+                    throw new SkippedException("file too big for FAT32");
+            }
+            throw ioe;
         }
-        largeFile.deleteOnExit();
     }
 
     /**