Shell { @VisibleForTesting static File checkHadoopHomeInner(String home) throws FileNotFoundException { if (home == null) { throw new FileNotFoundException(E_HADOOP_PROPS_UNSET); } while (home.startsWith("\"")) { home = home.substring(1); } while (home.endsWith("\"")) { home = home.substring(0, home.length() - 1); } if (home.isEmpty()) { throw new FileNotFoundException(E_HADOOP_PROPS_EMPTY); } File homedir = new File(home); if (!homedir.isAbsolute()) { throw new FileNotFoundException("Hadoop home directory " + homedir + " " + E_IS_RELATIVE); } if (!homedir.exists()) { throw new FileNotFoundException("Hadoop home directory " + homedir + " " + E_DOES_NOT_EXIST); } if (!homedir.isDirectory()) { throw new FileNotFoundException("Hadoop home directory " + homedir + " "+ E_NOT_DIRECTORY); } return homedir; } protected  Shell(); protected  Shell(long interval); protected  Shell(long interval, boolean redirectErrorStream); @Deprecated static boolean isJava7OrAbove(); static void checkWindowsCommandLineLength(String...commands); static String[] getGroupsCommand(); static String[] getGroupsForUserCommand(final String user); static String[] getGroupsIDForUserCommand(final String user); static String[] getUsersForNetgroupCommand(final String netgroup); static String[] getGetPermissionCommand(); static String[] getSetPermissionCommand(String perm, boolean recursive); static String[] getSetPermissionCommand(String perm,
      boolean recursive, String file); static String[] getSetOwnerCommand(String owner); static String[] getSymlinkCommand(String target, String link); static String[] getReadlinkCommand(String link); static String[] getCheckProcessIsAliveCommand(String pid); static String[] getSignalKillCommand(int code, String pid); static String getEnvironmentVariableRegex(); static File appendScriptExtension(File parent, String basename); static String appendScriptExtension(String basename); static String[] getRunScriptCommand(File script); static String getHadoopHome(); static File getQualifiedBin(String executable); static String getQualifiedBinPath(String executable); static boolean hasWinutilsPath(); static String getWinUtilsPath(); static File getWinUtilsFile(); String getEnvironment(String env); Process getProcess(); int getExitCode(); boolean isTimedOut(); static String execCommand(String ... cmd); static String execCommand(Map<String, String> env, String[] cmd,
      long timeout); static String execCommand(Map<String,String> env, String ... cmd); static final Logger LOG; static final String SYSPROP_HADOOP_HOME_DIR; static final String ENV_HADOOP_HOME; static final int WINDOWS_MAX_SHELL_LENGTH; @Deprecated
  static final int WINDOWS_MAX_SHELL_LENGHT; static final String USER_NAME_COMMAND; static final Object WindowsProcessLaunchLock; static final OSType osType; static final boolean WINDOWS; static final boolean SOLARIS; static final boolean MAC; static final boolean FREEBSD; static final boolean LINUX; static final boolean OTHER; static final boolean PPC_64; static final String ENV_NAME_REGEX; static final String SET_PERMISSION_COMMAND; static final String SET_OWNER_COMMAND; static final String SET_GROUP_COMMAND; static final String LINK_COMMAND; static final String READ_LINK_COMMAND; @Deprecated
  static final String WINUTILS; static final boolean isBashSupported; static final boolean isSetsidAvailable; static final String TOKEN_SEPARATOR_REGEX; }
@Test public void testHadoopHomeValid() throws Throwable { File f = checkHadoopHomeInner(rootTestDir.getCanonicalPath()); assertEquals(rootTestDir, f); }
@Test public void testHadoopHomeValidQuoted() throws Throwable { File f = checkHadoopHomeInner('"'+ rootTestDir.getCanonicalPath() + '"'); assertEquals(rootTestDir, f); }