return null; 
return null; }   var file = null; var updRoot = getFile(KEY_APPDIR); var fileLocator = Components.classes["@mozilla.org/file/directory_service;1"] .getService(Components.interfaces.nsIProperties); var programFilesDir = fileLocator.get(KEY_PROGRAMFILES, Components.interfaces.nsILocalFile); if (programFilesDir.contains(updRoot, true)) { var relativePath = updRoot.QueryInterface(Components.interfaces.nsILocalFile). getRelativeDescriptor(programFilesDir); var userLocalDir = fileLocator.get(KEY_LOCALDATA, Components.interfaces.nsILocalFile).parent; updRoot.setRelativeDescriptor(userLocalDir, relativePath); file = appendUpdateLogPath(updRoot);    if (!file) file = appendUpdateLogPath(getFile(KEY_UAPPDATA)); }   if (!file) file = appendUpdateLogPath(getFile(KEY_APPDIR));  return file; 
  _getUpdateLogFile: function() {    var file = getFile(KEY_APPDIR);     file.append("updates");    file.append("0");    file.append("update.log");    if (file.exists())      return file;    file = getFile(KEY_APPDIR);     file.append("updates");    file.append("last-update.log");    if (file.exists())      return file;    return null;  },
5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5872/6264b3f99e8da8a4942b9d6a4c258a93fd0ebab1/nsPostUpdateWin.js/clean/toolkit/mozapps/update/src/nsPostUpdateWin.js