org.argeo.cms/src/org/argeo/cms/util/OS.java

   1 package org.argeo.cms.util;
   2
   3 import java.io.File;
   4 import java.nio.file.Path;
   5 import java.nio.file.Paths;
   6
   7 /**
   8  * Wrapper around system properties and portable Java APIS, for when OS specific
   9  * informations are needed.
  10  */
  11 public class OS {
  12         public final static OS LOCAL = new OS();
  13
  14         private final String arch, name, version;
  15
  16         /** The OS of the running JVM */
  17         protected OS() {
  18                 arch = System.getProperty("os.arch");
  19                 name = System.getProperty("os.name");
  20                 version = System.getProperty("os.version");
  21         }
  22
  23         public String getArch() {
  24                 return arch;
  25         }
  26
  27         public String getName() {
  28                 return name;
  29         }
  30
  31         public String getVersion() {
  32                 return version;
  33         }
  34
  35         public boolean isMSWindows() {
  36                 // only MS Windows would use such an horrendous separator...
  37                 return File.separatorChar == '\\';
  38         }
  39
  40         public String[] getDefaultShellCommand() {
  41                 if (!isMSWindows())
  42                         return new String[] { "/bin/bash", "-l", "-i" };
  43                 else
  44                         return new String[] { "cmd.exe", "/C" };
  45         }
  46
  47 //      public static long getJvmPid() {
  48 //              return ProcessHandle.current().pid();
  49 ////            String pidAndHost = ManagementFactory.getRuntimeMXBean().getName();
  50 ////            return Integer.parseInt(pidAndHost.substring(0, pidAndHost.indexOf('@')));
  51 //      }
  52
  53         /**
  54          * Get the runtime directory. It will be the environment variable
  55          * XDG_RUNTIME_DIR if it is set, or /run if the user is 'root', or
  56          * ~/.cache/argeo if not.
  57          */
  58         public static Path getRunDir() {
  59                 Path runDir;
  60                 String xdgRunDir = System.getenv("XDG_RUNTIME_DIR");
  61                 if (xdgRunDir != null) {
  62                         // TODO support multiple names
  63                         runDir = Paths.get(xdgRunDir);
  64                 } else {
  65                         if (System.getProperty("user.name").equals("root")) {
  66                                 runDir = Paths.get("/run");
  67                         } else {
  68                                 runDir = Paths.get(System.getProperty("user.home"), ".cache/argeo");
  69                         }
  70                 }
  71                 return runDir;
  72         }
  73 }