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8224617: (fs) java/nio/file/FileStore/Basic.java found filesystem twice

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Reviewed-by: alanb
This commit is contained in:
Brian Burkhalter 2019-06-06 14:13:59 -07:00
parent 8bdcada62b
commit 185be26580
2 changed files with 94 additions and 3 deletions
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4
test/jdk/java/nio/file/FileStore/Basic.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2008, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2008, 2019, 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
@ -115,7 +115,7 @@ public class Basic {
/**
* Test: Enumerate all FileStores
*/
if (FileUtils.areFileSystemsAccessible()) {
if (FileUtils.areAllMountPointsAccessible()) {
FileStore prev = null;
for (FileStore store: FileSystems.getDefault().getFileStores()) {
System.out.format("%s (name=%s type=%s)\n", store, store.name(),

93
test/lib/jdk/test/lib/util/FileUtils.java
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2017, 2019, 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
@ -25,6 +25,8 @@ package jdk.test.lib.util;
import jdk.test.lib.Platform;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.PrintStream;
import java.io.UncheckedIOException;
@ -45,6 +47,8 @@ import java.util.ArrayDeque;
import java.util.HashSet;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.TimeUnit;
/**
@ -237,6 +241,93 @@ public final class FileUtils {
return areFileSystemsAccessible;
}
/**
* Checks whether all file systems are accessible. This is performed
* by checking free disk space on all mounted file systems via a
* separate, spawned process. File systems are considered to be
* accessible if this process completes successfully before a given
* fixed duration has elapsed.
*
* @implNote On Unix this executes the {@code df} command in a separate
* process and on Windows always returns {@code true}.
*
* @return whether file systems appear to be accessible
*
* @throws RuntimeException if there are duplicate mount points or some
* other execution problem occurs
*/
public static boolean areAllMountPointsAccessible() {
final AtomicBoolean areMountPointsOK = new AtomicBoolean(true);
if (!IS_WINDOWS) {
Thread thr = new Thread(() -> {
try {
Process proc = new ProcessBuilder("df").start();
BufferedReader reader = new BufferedReader
(new InputStreamReader(proc.getInputStream()));
// Skip the first line as it is the "df" output header.
if (reader.readLine() != null ) {
String prevMountPoint = null, mountPoint = null;
while ((mountPoint = reader.readLine()) != null) {
if (prevMountPoint != null &&
mountPoint.equals(prevMountPoint)) {
throw new RuntimeException
("System configuration error: " +
"duplicate mount point " + mountPoint +
" detected");
}
prevMountPoint = mountPoint;
}
}
try {
proc.waitFor(90, TimeUnit.SECONDS);
} catch (InterruptedException ignored) {
}
try {
int exitValue = proc.exitValue();
if (exitValue != 0) {
System.err.printf("df process exited with %d != 0%n",
exitValue);
areMountPointsOK.set(false);
}
} catch (IllegalThreadStateException ignored) {
System.err.println("df command apparently hung");
areMountPointsOK.set(false);
}
} catch (IOException ioe) {
throw new RuntimeException(ioe);
};
});
final AtomicReference throwableReference =
new AtomicReference<Throwable>();
thr.setUncaughtExceptionHandler(
new Thread.UncaughtExceptionHandler() {
public void uncaughtException(Thread t, Throwable e) {
throwableReference.set(e);
}
});
thr.start();
try {
thr.join(120*1000L);
} catch (InterruptedException ie) {
throw new RuntimeException(ie);
}
Throwable uncaughtException = (Throwable)throwableReference.get();
if (uncaughtException != null) {
throw new RuntimeException(uncaughtException);
}
if (thr.isAlive()) {
throw new RuntimeException("df thread did not join in time");
}
}
return areMountPointsOK.get();
}
/**
* List the open file descriptors (if supported by the 'lsof' command).
* @param ps a printStream to send the output to