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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/jdk/java/io/File/Basic.java Normal file
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/*
* Copyright (c) 1998, 2020, 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4165666 4203706 4288670 4290024
* @summary Basic heartbeat test for File methods that access the filesystem
* @build Basic Util
* @run main/othervm Basic
*/
import java.io.FileOutputStream;
import java.io.File;
import java.io.PrintStream;
public class Basic {
static PrintStream out = System.err;
static File rwFile = new File("x.Basic.rw");
static File bigFile = new File("x.Basic.big");
static File roFile = new File("x.Basic.ro");
static File thisDir = new File(".");
static File dir = new File("x.Basic.dir");
static File dir2 = new File("x.Basic.dir2");
static byte bytes[] = new byte[] {1, 2, 3, 4, 5, 6};
static void showBoolean(String what, boolean value) {
out.println(" " + what + ": " + value);
}
static void showLong(String what, long value) {
out.println(" " + what + ": " + value);
}
static void show(File f) throws Exception {
out.println(f + ": ");
showBoolean("exists", f.exists());
showBoolean("isFile", f.isFile());
showBoolean("isDirectory", f.isDirectory());
showBoolean("canRead", f.canRead());
showBoolean("canWrite", f.canWrite());
showLong("lastModified", f.lastModified());
showLong("length", f.length());
}
static void testFile(File f, boolean writeable, long length)
throws Exception
{
if (!f.exists()) fail(f, "does not exist");
if (!f.isFile()) fail(f, "is not a file");
if (f.isDirectory()) fail(f, "is a directory");
if (!f.canRead()) fail(f, "is not readable");
if (!Util.isPrivileged() && f.canWrite() != writeable)
fail(f, writeable ? "is not writeable" : "is writeable");
if (f.length() != length) fail(f, "has wrong length");
}
static void fail(File f, String why) throws Exception {
throw new Exception(f + " " + why);
}
static void setup() throws Exception {
rwFile.delete();
bigFile.delete();
roFile.delete();
thisDir.delete();
dir.delete();
dir2.delete();
try (FileOutputStream fos = new FileOutputStream(rwFile)) {
fos.write(bytes);
}
roFile.createNewFile();
roFile.setReadOnly();
}
public static void main(String[] args) throws Exception {
setup();
show(rwFile);
testFile(rwFile, true, bytes.length);
rwFile.delete();
if (rwFile.exists()) {
fail(rwFile, "could not delete");
}
show(roFile);
testFile(roFile, false, 0);
show(thisDir);
if (!thisDir.exists()) fail(thisDir, "does not exist");
if (thisDir.isFile()) fail(thisDir, "is a file");
if (!thisDir.isDirectory()) fail(thisDir, "is not a directory");
if (!thisDir.canRead()) fail(thisDir, "is readable");
if (!thisDir.canWrite()) fail(thisDir, "is writeable");
String[] fs = thisDir.list();
if (fs == null) fail(thisDir, "list() returned null");
out.print(" [" + fs.length + "]");
for (int i = 0; i < fs.length; i++) {
out.print(" " + fs[i]);
}
out.println();
if (fs.length == 0) fail(thisDir, "is empty");
if (!dir.mkdir() || !dir.exists() || !dir.isDirectory()) {
fail(dir, "could not create");
}
if (!dir.renameTo(dir2)) {
fail(dir, "failed to rename");
}
if (dir.exists() || !dir2.exists() || !dir2.isDirectory()) {
fail(dir, "not renamed");
}
System.err.println("NOTE: Large files not supported on this system");
}
}