在Java中启动Shell脚本并在退出时销毁所有进程

我需要某种特殊的设置来控制LED墙。可悲的是，我不能真正改变我使用的编程语言。我的设置如下所示：

引导过程之后，开始处理（一些疯狂的Java fork ...）。处理草图会扫描文件夹中的子文件夹（可以启动其他草图并控制LED墙）并启动Web服务器。服务器将显示所有扫描文件夹的列表。在单击上，“ Web服务器”将通过ProcessBuilder启动选定的草图。处理草图如下所示：

import http.*;
import java.util.*;
import java.lang.*;

SimpleHTTPServer server;
String prog = "";
int ExitValue = 1;
ProcessBuilder preparedsketch;
Process runningsketch;

void setup() {
  SimpleHTTPServer.useIndexHtml = false;
  server = new SimpleHTTPServer(this);
  TemplateFileHandler templateHandler = new ResultFiles("index.ftl");
  server.createContext("", templateHandler);
}


class ResultFiles extends TemplateFileHandler {
  public ResultFiles(String templateFileName) {
    super(templateFileName);
  }
  void createMap() {
    Map<String, String> params = queryToMap();
    if (params.containsKey("prog")) {
      if (params.get("prog").equals(prog)) {
        println("Has not changed");
      } else {
        println("PrevProcess: " + runningsketch);
        if (runningsketch != null) {
          println("Killing: " + runningsketch);
          runningsketch.destroy();
        }
        prog = params.get("prog");
        try {
          runningsketch = new ProcessBuilder("/Users/kessleml/dev/pixelpusher/base/processing-quit.sh", "--sketch=/Users/kessleml/dev/pixelpusher/base/sketches/pixelpusher_colourcycle_halloween", "--run").start();
          // runningsketch = new ProcessBuilder("/usr/local/bin/processing-java", "--force", "--sketch=" + sketchPath("sketches/" + prog + "/"), "--no-java", "--run").start();
        } catch (IOException ex) {
          println(ex);
        }
        println("ProjChagned: " + prog);
        println("NewProcess: " + runningsketch);
      }
    }

    File files = new File(sketchPath("sketches"));
    String[] fileslist = files.list();
    addVariable("files", fileslist);
    addVariable("selectedprog", prog);
  }
}

到现在为止一切正常。但是，如果我进行更改（当然，请单击网站上的另一个草图），我当然想关闭一个正在运行的（和循环的）草图。问题是：

当我通过runninngsketch = new ProcessBuilder("Path/To/ProcessingCLI", "--sketch=Path/To/Selected/Sketch", "--run").start();多个过程启动选定的草图时。造成这种情况的原因是ProcessingCLI文件：

#!/bin/sh

# Prevents processing-java from stealing focus, see:
# https://github.com/processing/processing/issues/3996.
OPTION_FOR_HEADLESS_RUN=""
for ARG in "$@"
do
    if [ "$ARG" = "--build" ]; then
        OPTION_FOR_HEADLESS_RUN="-Djava.awt.headless=true"
    fi
done

cd "/Applications/Processing.app/Contents/Java" && /Applications/Processing.app/Contents/PlugIns/jdk1.8.0_74.jdk/Contents/Home/jre/bin/java -Djna.nosys=true $OPTION_FOR_HEADLESS_RUN -cp "ant-launcher.jar:ant.jar:core.jar:jna.jar:pde.jar:core/library/core.jar:core/library/gluegen-rt-natives-linux-amd64.jar:core/library/gluegen-rt-natives-linux-armv6hf.jar:core/library/gluegen-rt-natives-linux-i586.jar:core/library/gluegen-rt-natives-macosx-universal.jar:core/library/gluegen-rt-natives-windows-amd64.jar:core/library/gluegen-rt-natives-windows-i586.jar:core/library/gluegen-rt.jar:core/library/jogl-all-natives-linux-amd64.jar:core/library/jogl-all-natives-linux-armv6hf.jar:core/library/jogl-all-natives-linux-i586.jar:core/library/jogl-all-natives-macosx-universal.jar:core/library/jogl-all-natives-windows-amd64.jar:core/library/jogl-all-natives-windows-i586.jar:core/library/jogl-all.jar:modes/java/mode/antlr.jar:modes/java/mode/classpath-explorer-1.0.jar:modes/java/mode/com.ibm.icu.jar:modes/java/mode/JavaMode.jar:modes/java/mode/jdi.jar:modes/java/mode/jdimodel.jar:modes/java/mode/jdtCompilerAdapter.jar:modes/java/mode/jsoup-1.7.1.jar:modes/java/mode/org.eclipse.core.contenttype.jar:modes/java/mode/org.eclipse.core.jobs.jar:modes/java/mode/org.eclipse.core.resources.jar:modes/java/mode/org.eclipse.core.runtime.jar:modes/java/mode/org.eclipse.equinox.common.jar:modes/java/mode/org.eclipse.equinox.preferences.jar:modes/java/mode/org.eclipse.jdt.core.jar:modes/java/mode/org.eclipse.osgi.jar:modes/java/mode/org.eclipse.text.jar:modes/java/mode/org.netbeans.swing.outline.jar" processing.mode.java.Commander "$@"

因此，ProcessBuilder启动了三个进程：一个sh进程，它启动两个Java-Children-Processs。当我使用runningsketch.destroy()它只会杀死sh进程。这两个Java进程继续运行。（由于我是在MacOS Yosemite上进行开发的，因此不知道这是否也是由于以下错误引起的：http : //bugs.java.com/bugdatabase/view_bug.do? bug_id=4770092。最终产品应在Linux机器上运行。）

我的解决方案是编写一个新的sh脚本，该脚本通过以下方式杀死所有子进程trap：

#!/bin/sh

OPTION_FOR_HEADLESS_RUN=""

function killAllChildren {
    kill -9 -$(ps -o pgid= $$ | grep -o '[0-9]*')
}

trap killAllChildren SIGTERM SIGKILL
# trap "trap - SIGTERM && kill -- $$" SIGINT SIGTERM EXIT

cd "/Applications/Processing.app/Contents/Java"

/Applications/Processing.app/Contents/PlugIns/jdk1.8.0_74.jdk/Contents/Home/jre/bin/java -Djna.nosys=true $OPTION_FOR_HEADLESS_RUN -cp "ant-launcher.jar:ant.jar:core.jar:jna.jar:pde.jar:core/library/core.jar:core/library/gluegen-rt-natives-linux-amd64.jar:core/library/gluegen-rt-natives-linux-armv6hf.jar:core/library/gluegen-rt-natives-linux-i586.jar:core/library/gluegen-rt-natives-macosx-universal.jar:core/library/gluegen-rt-natives-windows-amd64.jar:core/library/gluegen-rt-natives-windows-i586.jar:core/library/gluegen-rt.jar:core/library/jogl-all-natives-linux-amd64.jar:core/library/jogl-all-natives-linux-armv6hf.jar:core/library/jogl-all-natives-linux-i586.jar:core/library/jogl-all-natives-macosx-universal.jar:core/library/jogl-all-natives-windows-amd64.jar:core/library/jogl-all-natives-windows-i586.jar:core/library/jogl-all.jar:modes/java/mode/antlr.jar:modes/java/mode/classpath-explorer-1.0.jar:modes/java/mode/com.ibm.icu.jar:modes/java/mode/JavaMode.jar:modes/java/mode/jdi.jar:modes/java/mode/jdimodel.jar:modes/java/mode/jdtCompilerAdapter.jar:modes/java/mode/jsoup-1.7.1.jar:modes/java/mode/org.eclipse.core.contenttype.jar:modes/java/mode/org.eclipse.core.jobs.jar:modes/java/mode/org.eclipse.core.resources.jar:modes/java/mode/org.eclipse.core.runtime.jar:modes/java/mode/org.eclipse.equinox.common.jar:modes/java/mode/org.eclipse.equinox.preferences.jar:modes/java/mode/org.eclipse.jdt.core.jar:modes/java/mode/org.eclipse.osgi.jar:modes/java/mode/org.eclipse.text.jar:modes/java/mode/org.netbeans.swing.outline.jar" processing.mode.java.Commander "$@"

但是不知何故，这也不起作用。即使启动了新的sh脚本并向启动的sh进程发送了例如SIGTERM，也不会破坏两个Java进程，也不会破坏sh进程。