jdk

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/*
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 * Copyright (c) 2019, Google Inc. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @summary Test with symbolic linked lib/modules
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 * @bug 8220095
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 * @requires os.family == "linux" | os.family == "mac"
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 * @requires vm.flagless
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 * @library /test/lib
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 * @modules java.management
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 *          jdk.jlink
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 * @run driver ModulesSymLink
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 */
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import java.io.File;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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public class ModulesSymLink {
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    static String java_home;
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    static String test_jdk;
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    public static void main(String[] args) throws Throwable {
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        java_home = System.getProperty("java.home");
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        test_jdk = System.getProperty("user.dir") + File.separator +
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                   "modulessymlink_jdk" + Long.toString(System.currentTimeMillis());
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        constructTestJDK();
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        ProcessBuilder pb = new ProcessBuilder(
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            test_jdk + File.separator + "bin" + File.separator + "java",
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            "-version");
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        OutputAnalyzer out = new OutputAnalyzer(pb.start());
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        out.shouldHaveExitValue(0);
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    }
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    // 1) Create a test JDK binary (jlink is used to help simplify the process,
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    //    alternatively a test JDK could be copied from JAVA_HOME.)
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    // 2) Rename the test JDK's lib/modules to lib/0.
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    // 3) Then create a link to lib/0 as lib/modules.
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    static void constructTestJDK() throws Throwable {
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        Path jlink = Paths.get(java_home, "bin", "jlink");
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        System.out.println("Jlink = " + jlink);
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        OutputAnalyzer out = ProcessTools.executeProcess(jlink.toString(),
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                  "--output", test_jdk,
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                  "--add-modules", "java.base");
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        out.shouldHaveExitValue(0);
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        Path modules = Paths.get(test_jdk, "lib", "modules");
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        Path renamed_modules = Paths.get(test_jdk, "lib", "0");
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        Files.move(modules, renamed_modules);
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        Files.createSymbolicLink(modules, renamed_modules);
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    }
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}
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