Introduce OS utility.

diff --git a/org.argeo.util/src/org/argeo/util/OS.java b/org.argeo.util/src/org/argeo/util/OS.java
new file mode 100644 (file)
index 0000000..d8127b6
--- /dev/null
+++ b/org.argeo.util/src/org/argeo/util/OS.java
@@ -0,0 +1,56 @@
+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('@')));
+       }
+}