/* * Copyright (c) 2006, 2012, 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 6423026 * @summary Check that it is possible to open more than 2,048 zip files on * Windows.
*/
publicstaticvoid realMain(String[] args) throws Throwable { // Linux does not yet allow opening this many files; Solaris // 8 requires an explicit allocation of more file descriptors // to succeed. Since this test is written to check for a // Windows capability it is much simpler to only run it // on that platform.
String osName = System.getProperty("os.name"); if (!(osName.startsWith("Windows"))) { return;
}
// Create some zip data
ByteArrayOutputStream baos = new ByteArrayOutputStream(); try (ZipOutputStream zos = new ZipOutputStream(baos)) {
ZipEntry ze = new ZipEntry("test");
zos.putNextEntry(ze); byte[] hello = "hello, world".getBytes("ASCII");
zos.write(hello, 0, hello.length);
zos.closeEntry();
zos.finish();
} byte[] data = baos.toByteArray();
ZipFile zips[] = new ZipFile[numFiles];
try { // Create a directory for zip files created below
File tmpdir = new File(
System.getProperty("java.io.tmpdir")
+ File.separator + "ManyZipFiles"); if (tmpdir.exists() && !tmpdir.isDirectory()) {
fail(tmpdir.getAbsolutePath()
+ " already exists but is not a directory"); return;
} if (!tmpdir.exists()) { if (!tmpdir.mkdirs()) {
fail("Couldn't create directory "
+ tmpdir.getAbsolutePath() + " for test files"); return;
}
} elseif (!tmpdir.canWrite()) {
fail("Don't have write access for directory "
+ tmpdir.getAbsolutePath() + " for test files"); return;
}
tmpdir.deleteOnExit();
// Create and then open a large number of zip files for (int i = 0; i < numFiles; i++) {
File f = File.createTempFile("test", ".zip", tmpdir);
f.deleteOnExit(); try (FileOutputStream fos = new FileOutputStream(f)) {
fos.write(data, 0, data.length);
} try {
zips[i] = new ZipFile(f);
} catch (Throwable t) {
fail("Failed to open zip file #" + i + " named "
+ zips[i].getName()); throw t;
}
}
} finally { // This finally block is due to bug 4171239. On Windows, if the // file is still open at the end of the VM, deleteOnExit won't // take place. "new ZipFile(...)" opens the zip file, so we have // to explicitly close those opened above. This finally block can // be removed when 4171239 is fixed. See also 6357433, against which // 4171239 was closed as a duplicate. for (int i = 0; i < numFiles; i++) { if (zips[i] != null) { try {
zips[i].close();
} catch (Throwable t) {
fail("At zip[" + i + "] named " + zips[i].getName()
+ " caught " + t);
}
}
}
}
pass();
}
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