/**
   * Starts the configuration service
   *
   * @param bundleContext the <tt>BundleContext</tt> as provided by the OSGi framework.
   * @throws Exception if anything goes wrong
   */
  public void start(BundleContext bundleContext) throws Exception {
    FileAccessService fas = ServiceUtils.getService(bundleContext, FileAccessService.class);

    if (fas != null) {
      File usePropFileConfig;
      try {
        usePropFileConfig =
            fas.getPrivatePersistentFile(".usepropfileconfig", FileCategory.PROFILE);
      } catch (Exception ise) {
        // There is somewhat of a chicken-and-egg dependency between
        // FileConfigurationServiceImpl and ConfigurationServiceImpl:
        // FileConfigurationServiceImpl throws IllegalStateException if
        // certain System properties are not set,
        // ConfigurationServiceImpl will make sure that these properties
        // are set but it will do that later.
        // A SecurityException is thrown when the destination
        // is not writable or we do not have access to that folder
        usePropFileConfig = null;
      }

      if (usePropFileConfig != null && usePropFileConfig.exists()) {
        logger.info("Using properties file configuration store.");
        this.cs = LibJitsi.getConfigurationService();
      }
    }

    if (this.cs == null) {
      this.cs = new JdbcConfigService(fas);
    }

    bundleContext.registerService(ConfigurationService.class.getName(), this.cs, null);

    fixPermissions(this.cs);
  }
  /**
   * Makes home folder and the configuration file readable and writable only to the owner.
   *
   * @param cs the <tt>ConfigurationService</tt> instance to check for home folder and configuration
   *     file.
   */
  private static void fixPermissions(ConfigurationService cs) {
    if (!OSUtils.IS_LINUX && !OSUtils.IS_MAC) return;

    try {
      // let's check config file and config folder
      File homeFolder = new File(cs.getScHomeDirLocation(), cs.getScHomeDirName());
      Set<PosixFilePermission> perms =
          new HashSet<PosixFilePermission>() {
            {
              add(PosixFilePermission.OWNER_READ);
              add(PosixFilePermission.OWNER_WRITE);
              add(PosixFilePermission.OWNER_EXECUTE);
            }
          };
      Files.setPosixFilePermissions(Paths.get(homeFolder.getAbsolutePath()), perms);

      String fileName = cs.getConfigurationFilename();
      if (fileName != null) {
        File cf = new File(homeFolder, fileName);
        if (cf.exists()) {
          perms =
              new HashSet<PosixFilePermission>() {
                {
                  add(PosixFilePermission.OWNER_READ);
                  add(PosixFilePermission.OWNER_WRITE);
                }
              };
          Files.setPosixFilePermissions(Paths.get(cf.getAbsolutePath()), perms);
        }
      }
    } catch (Throwable t) {
      logger.error("Error creating c lib instance for fixing file permissions", t);

      if (t instanceof InterruptedException) Thread.currentThread().interrupt();
      else if (t instanceof ThreadDeath) throw (ThreadDeath) t;
    }
  }
/**
 * @author Emil Ivov
 * @author Lyubomir Marinov
 */
public class ConfigurationActivator implements BundleActivator {
  /** The <tt>Logger</tt> used by the <tt>ConfigurationActivator</tt> class for logging output. */
  private static final Logger logger = Logger.getLogger(ConfigurationActivator.class);

  /** The currently registered {@link ConfigurationService} instance. */
  private ConfigurationService cs;

  /**
   * Starts the configuration service
   *
   * @param bundleContext the <tt>BundleContext</tt> as provided by the OSGi framework.
   * @throws Exception if anything goes wrong
   */
  public void start(BundleContext bundleContext) throws Exception {
    FileAccessService fas = ServiceUtils.getService(bundleContext, FileAccessService.class);

    if (fas != null) {
      File usePropFileConfig;
      try {
        usePropFileConfig =
            fas.getPrivatePersistentFile(".usepropfileconfig", FileCategory.PROFILE);
      } catch (Exception ise) {
        // There is somewhat of a chicken-and-egg dependency between
        // FileConfigurationServiceImpl and ConfigurationServiceImpl:
        // FileConfigurationServiceImpl throws IllegalStateException if
        // certain System properties are not set,
        // ConfigurationServiceImpl will make sure that these properties
        // are set but it will do that later.
        // A SecurityException is thrown when the destination
        // is not writable or we do not have access to that folder
        usePropFileConfig = null;
      }

      if (usePropFileConfig != null && usePropFileConfig.exists()) {
        logger.info("Using properties file configuration store.");
        this.cs = LibJitsi.getConfigurationService();
      }
    }

    if (this.cs == null) {
      this.cs = new JdbcConfigService(fas);
    }

    bundleContext.registerService(ConfigurationService.class.getName(), this.cs, null);

    fixPermissions(this.cs);
  }

  /**
   * Causes the configuration service to store the properties object and unregisters the
   * configuration service.
   *
   * @param bundleContext <tt>BundleContext</tt>
   * @throws Exception if anything goes wrong while storing the properties managed by the
   *     <tt>ConfigurationService</tt> implementation provided by this bundle and while
   *     unregistering the service in question
   */
  public void stop(BundleContext bundleContext) throws Exception {
    this.cs.storeConfiguration();
    this.cs = null;
  }

  /**
   * Makes home folder and the configuration file readable and writable only to the owner.
   *
   * @param cs the <tt>ConfigurationService</tt> instance to check for home folder and configuration
   *     file.
   */
  private static void fixPermissions(ConfigurationService cs) {
    if (!OSUtils.IS_LINUX && !OSUtils.IS_MAC) return;

    try {
      // let's check config file and config folder
      File homeFolder = new File(cs.getScHomeDirLocation(), cs.getScHomeDirName());
      Set<PosixFilePermission> perms =
          new HashSet<PosixFilePermission>() {
            {
              add(PosixFilePermission.OWNER_READ);
              add(PosixFilePermission.OWNER_WRITE);
              add(PosixFilePermission.OWNER_EXECUTE);
            }
          };
      Files.setPosixFilePermissions(Paths.get(homeFolder.getAbsolutePath()), perms);

      String fileName = cs.getConfigurationFilename();
      if (fileName != null) {
        File cf = new File(homeFolder, fileName);
        if (cf.exists()) {
          perms =
              new HashSet<PosixFilePermission>() {
                {
                  add(PosixFilePermission.OWNER_READ);
                  add(PosixFilePermission.OWNER_WRITE);
                }
              };
          Files.setPosixFilePermissions(Paths.get(cf.getAbsolutePath()), perms);
        }
      }
    } catch (Throwable t) {
      logger.error("Error creating c lib instance for fixing file permissions", t);

      if (t instanceof InterruptedException) Thread.currentThread().interrupt();
      else if (t instanceof ThreadDeath) throw (ThreadDeath) t;
    }
  }
}