Zombies.java revision 0
0N/A/*
0N/A * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
0N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
0N/A * CA 95054 USA or visit www.sun.com if you need additional information or
0N/A * have any questions.
0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 6474073
0N/A * @summary Make sure zombies don't get created on Unix
0N/A * @author Martin Buchholz
0N/A */
0N/A
0N/Aimport java.io.*;
0N/A
0N/Apublic class Zombies {
0N/A public static void main(String[] args) throws Throwable {
0N/A if (! new File("/usr/bin/perl").canExecute() ||
0N/A ! new File("/bin/ps").canExecute())
0N/A return;
0N/A System.out.println("Looks like a Unix system.");
0N/A final Runtime rt = Runtime.getRuntime();
0N/A
0N/A try {
0N/A rt.exec("no-such-file");
0N/A throw new Error("expected IOException not thrown");
0N/A } catch (IOException _) {/* OK */}
0N/A
0N/A try {
0N/A rt.exec(".");
0N/A throw new Error("expected IOException not thrown");
0N/A } catch (IOException _) {/* OK */}
0N/A
0N/A try {
0N/A rt.exec("/bin/true", null, new File("no-such-dir"));
0N/A throw new Error("expected IOException not thrown");
0N/A } catch (IOException _) {/* OK */}
0N/A
0N/A rt.exec("/bin/true").waitFor();
0N/A
0N/A // Count all the zombies that are children of this Java process
0N/A final String[] zombieCounter = {
0N/A "/usr/bin/perl", "-e",
0N/A "exit @{[`/bin/ps -eo ppid,s` =~ /^ *@{[getppid]} +Z$/mog]}"
0N/A };
0N/A
0N/A int zombies = rt.exec(zombieCounter).waitFor();
0N/A if (zombies != 0) throw new Error(zombies + " zombies!");
0N/A }
0N/A}