package org.argeo.util;
   
   import java.io.File;
   import java.lang.management.ManagementFactory;
   
   /** When OS specific informations are needed. */
   public class OS {
   	public final static OS LOCAL = new OS();
   
  	private final String arch, name, version;
  
  	/** The OS of the running JVM */
  	protected OS() {
  		arch = System.getProperty("os.arch");
  		name = System.getProperty("os.name");
  		version = System.getProperty("os.version");
  	}
  
  	public String getArch() {
  		return arch;
  	}
  
  	public String getName() {
  		return name;
  	}
  
  	public String getVersion() {
  		return version;
  	}
  
  	public boolean isMSWindows() {
  		// only MS Windows would use such an horrendous separator...
  		return File.separatorChar == '\\';
  	}
  
  	public String[] getDefaultShellCommand() {
  		if (!isMSWindows())
  			return new String[] { "/bin/sh", "-l", "-i" };
  		else
  			return new String[] { "cmd.exe", "/C" };
  	}
  
  	public static Integer getJvmPid() {
  		/*
  		 * This method works on most platforms (including Linux). Although when Java 9
  		 * comes along, there is a better way: long pid =
  		 * ProcessHandle.current().getPid();
  		 *
  		 * See:
  		 * http://stackoverflow.com/questions/35842/how-can-a-java-program-get-its-own-
  		 * process-id
  		 */
  		String pidAndHost = ManagementFactory.getRuntimeMXBean().getName();
  		return Integer.parseInt(pidAndHost.substring(0, pidAndHost.indexOf('@')));
  	}
  }