text: // dbshell.cpp
  /*
   *    Copyright 2010 10gen Inc.
   *
   *    Licensed under the Apache License, Version 2.0 (the "License");
   *    you may not use this file except in compliance with the License.
   *    You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   */
  
  #include "pch.h"
  #include <stdio.h>
  #include <string.h>
  
  #include "../third_party/linenoise/linenoise.h"
  #include "../scripting/engine.h"
  #include "../client/dbclient.h"
  #include "../util/unittest.h"
  #include "../db/cmdline.h"
  #include "utils.h"
  #include "../util/password.h"
  #include "../util/version.h"
  #include "../util/goodies.h"
  #include "../util/file.h"
  #include "../db/repl/rs_member.h"
  
  #include <boost/filesystem/operations.hpp>
  
  using namespace std;
  using namespace mongo;
  
  string historyFile;
  bool gotInterrupted = false;
  bool inMultiLine = false;
  static volatile bool atPrompt = false; // can eval before getting to prompt
  bool autoKillOp = false;
  
  #if !defined(__freebsd__) && !defined(__openbsd__) && !defined(_WIN32)
  // this is for ctrl-c handling
  #include <setjmp.h>
  jmp_buf jbuf;
  #endif
  
  namespace mongo {
  
      Scope * shellMainScope;
  
      extern bool dbexitCalled;
  }
  
  void generateCompletions( const string& prefix , vector<string>& all ) {
      if ( prefix.find( '"' ) != string::npos )
          return;
  
      try {
          BSONObj args = BSON( "0" << prefix );
          shellMainScope->invokeSafe( "function callShellAutocomplete(x) {shellAutocomplete(x)}", &args, 0, 1000 );
          BSONObjBuilder b;
          shellMainScope->append( b , "" , "__autocomplete__" );
          BSONObj res = b.obj();
          BSONObj arr = res.firstElement().Obj();
  
          BSONObjIterator i( arr );
          while ( i.more() ) {
              BSONElement e = i.next();
              all.push_back( e.String() );
          }
      }
      catch ( ... ) {
      }
  }
  
  void completionHook( const char* text , linenoiseCompletions* lc ) {
      vector<string> all;
      generateCompletions( text , all );
  
      for ( unsigned i = 0; i < all.size(); ++i )
          linenoiseAddCompletion( lc , (char*)all[i].c_str() );
  }
  
  void shellHistoryInit() {
      stringstream ss;
      const char * h = shellUtils::getUserDir();
      if ( h )
          ss << h << "/";
      ss << ".dbshell";
      historyFile = ss.str();
  
      linenoiseHistoryLoad( historyFile.c_str() );
      linenoiseSetCompletionCallback( completionHook );
  }
  
  void shellHistoryDone() {
      linenoiseHistorySave( historyFile.c_str() );
      linenoiseHistoryFree();
  }
  void shellHistoryAdd( const char * line ) {
      if ( line[0] == '\0' )
          return;
  
      // dont record duplicate lines
      static string lastLine;
      if ( lastLine == line )
          return;
      lastLine = line;
  
      if ( strstr( line, ".auth") == NULL &&
           strstr( line, ".addUser") == NULL )
      {
          linenoiseHistoryAdd( line );
      }
  }
  
  #ifdef CTRLC_HANDLE
  void intr( int sig ) {
      longjmp( jbuf , 1 );
  }
  #endif
  
  void killOps() {
      if ( mongo::shellUtils::_nokillop || mongo::shellUtils::_allMyUris.size() == 0 )
          return;
  
      if ( atPrompt )
          return;
  
      sleepmillis(10); // give current op a chance to finish
  
      for( map< string, set<string> >::const_iterator i = shellUtils::_allMyUris.begin(); i != shellUtils::_allMyUris.end(); ++i ) {
          string errmsg;
          ConnectionString cs = ConnectionString::parse( i->first, errmsg );
          if (!cs.isValid()) continue;
          boost::scoped_ptr<DBClientWithCommands> conn( cs.connect( errmsg ) );
          if (!conn) continue;
  
          const set<string>& uris = i->second;
  
          BSONObj inprog =  conn->findOne( "admin.$cmd.sys.inprog", Query() )["inprog"].embeddedObject().getOwned();
          BSONForEach( op, inprog ) {
              if ( uris.count( op["client"].String() ) ) {
                  ONCE if ( !autoKillOp ) {
                      cout << endl << "do you want to kill the current op(s) on the server? (y/n): ";
                      cout.flush();
  
                      char yn;
                      cin >> yn;
  
                      if ( yn != 'y' && yn != 'Y' )
                          return;
                  }
  
                  conn->findOne( "admin.$cmd.sys.killop", QUERY( "op"<< op["opid"] ) );
              }
          }
      }
  }
  
  void quitNicely( int sig ) {
      mongo::dbexitCalled = true;
      if ( sig == SIGINT && inMultiLine ) {
          gotInterrupted = 1;
          return;
      }
  
  #if !defined(_WIN32)
      if ( sig == SIGPIPE )
          mongo::rawOut( "mongo got signal SIGPIPE\n" );
  #endif
  
      killOps();
      shellHistoryDone();
      exit(0);
  }
  
  // the returned string is allocated with strdup() or malloc() and must be freed by calling free()
  char * shellReadline( const char * prompt , int handlesigint = 0 ) {
      atPrompt = true;
  
  #ifdef CTRLC_HANDLE
      if ( ! handlesigint ) {
          char* ret = linenoise( prompt );
          atPrompt = false;
          return ret;
      }
      if ( setjmp( jbuf ) ) {
          gotInterrupted = 1;
          sigrelse(SIGINT);
          signal( SIGINT , quitNicely );
          return 0;
      }
      signal( SIGINT , intr );
  #endif
  
      char * ret = linenoise( prompt );
      if ( ! ret ) {
          gotInterrupted = true;  // got ^C, break out of multiline
      }
  
      signal( SIGINT , quitNicely );
      atPrompt = false;
      return ret;
  }
  
  #ifdef _WIN32
  char * strsignal(int sig){
      switch (sig){
          case SIGINT: return "SIGINT";
          case SIGTERM: return "SIGTERM";
          case SIGABRT: return "SIGABRT";
          case SIGSEGV: return "SIGSEGV";
          case SIGFPE: return "SIGFPE";
          default: return "unknown";
      }
  }
  #endif
  
  void quitAbruptly( int sig ) {
      ostringstream ossSig;
      ossSig << "mongo got signal " << sig << " (" << strsignal( sig ) << "), stack trace: " << endl;
      mongo::rawOut( ossSig.str() );
  
      ostringstream ossBt;
      mongo::printStackTrace( ossBt );
      mongo::rawOut( ossBt.str() );
  
      mongo::shellUtils::KillMongoProgramInstances();
      exit( 14 );
  }
  
  // this will be called in certain c++ error cases, for example if there are two active
  // exceptions
  void myterminate() {
      mongo::rawOut( "terminate() called in shell, printing stack:" );
      mongo::printStackTrace();
      exit( 14 );
  }
  
  void setupSignals() {
      signal( SIGINT , quitNicely );
      signal( SIGTERM , quitNicely );
      signal( SIGABRT , quitAbruptly );
      signal( SIGSEGV , quitAbruptly );
      signal( SIGFPE , quitAbruptly );
  
  #if !defined(_WIN32) // surprisingly these are the only ones that don't work on windows
      signal( SIGPIPE , quitNicely ); // Maybe just log and continue?
      signal( SIGBUS , quitAbruptly );
  #endif
  
      set_terminate( myterminate );
  }
  
  string fixHost( string url , string host , string port ) {
      //cout << "fixHost url: " << url << " host: " << host << " port: " << port << endl;
  
      if ( host.size() == 0 && port.size() == 0 ) {
          if ( url.find( "/" ) == string::npos ) {
              // check for ips
              if ( url.find( "." ) != string::npos )
                  return url + "/test";
  
              if ( url.rfind( ":" ) != string::npos &&
                      isdigit( url[url.rfind(":")+1] ) )
                  return url + "/test";
          }
          return url;
      }
  
      if ( url.find( "/" ) != string::npos ) {
          cerr << "url can't have host or port if you specify them individually" << endl;
          exit(-1);
      }
  
      if ( host.size() == 0 )
          host = "127.0.0.1";
  
      string newurl = host;
      if ( port.size() > 0 )
          newurl += ":" + port;
      else if ( host.find(':') == string::npos ) {
          // need to add port with IPv6 addresses
          newurl += ":27017";
      }
  
      newurl += "/" + url;
  
      return newurl;
  }
  
  static string OpSymbols = "~!%^&*-+=|:,<>/?.";
  
  bool isOpSymbol( char c ) {
      for ( size_t i = 0; i < OpSymbols.size(); i++ )
          if ( OpSymbols[i] == c ) return true;
      return false;
  }
  
  bool isUseCmd( string code ) {
      string cmd = code;
      if ( cmd.find( " " ) > 0 )
          cmd = cmd.substr( 0 , cmd.find( " " ) );
      return cmd == "use";
  }
  
  bool isBalanced( string code ) {
      if (isUseCmd( code ))
          return true;  // don't balance "use <dbname>" in case dbname contains special chars
      int brackets = 0;
      int parens = 0;
      bool danglingOp = false;
  
      for ( size_t i=0; i<code.size(); i++ ) {
          switch( code[i] ) {
          case '/':
              if ( i + 1 < code.size() && code[i+1] == '/' ) {
                  while ( i  <code.size() && code[i] != '\n' )
                      i++;
              }
              continue;
          case '{': brackets++; break;
          case '}': if ( brackets <= 0 ) return true; brackets--; break;
          case '(': parens++; break;
          case ')': if ( parens <= 0 ) return true; parens--; break;
          case '"':
              i++;
              while ( i < code.size() && code[i] != '"' ) i++;
              break;
          case '\'':
              i++;
              while ( i < code.size() && code[i] != '\'' ) i++;
              break;
          case '\\':
              if ( i + 1 < code.size() && code[i+1] == '/' ) i++;
              break;
          case '+':
          case '-':
              if ( i + 1 < code.size() && code[i+1] == code[i] ) {
                  i++;
                  continue; // postfix op (++/--) can't be a dangling op
              }
              break;
          }
          if ( i >= code.size() ) {
              danglingOp = false;
              break;
          }
          if ( isOpSymbol( code[i] ) ) danglingOp = true;
          else if ( !std::isspace( static_cast<unsigned char>( code[i] ) ) ) danglingOp = false;
      }
  
      return brackets == 0 && parens == 0 && !danglingOp;
  }
  
  using mongo::asserted;
  
  struct BalancedTest : public mongo::UnitTest {
  public:
      void run() {
          assert( isBalanced( "x = 5" ) );
          assert( isBalanced( "function(){}" ) );
          assert( isBalanced( "function(){\n}" ) );
          assert( ! isBalanced( "function(){" ) );
          assert( isBalanced( "x = \"{\";" ) );
          assert( isBalanced( "// {" ) );
          assert( ! isBalanced( "// \n {" ) );
          assert( ! isBalanced( "\"//\" {" ) );
          assert( isBalanced( "{x:/x\\//}" ) );
          assert( ! isBalanced( "{ \\/// }" ) );
          assert( isBalanced( "x = 5 + y ") );
          assert( ! isBalanced( "x = ") );
          assert( ! isBalanced( "x = // hello") );
          assert( ! isBalanced( "x = 5 +") );
          assert( isBalanced( " x ++") );
          assert( isBalanced( "-- x") );
          assert( !isBalanced( "a.") );
          assert( !isBalanced( "a. ") );
          assert( isBalanced( "a.b") );
      }
  } balanced_test;
  
  string finishCode( string code ) {
      while ( ! isBalanced( code ) ) {
          inMultiLine = true;
          code += "\n";
          // cancel multiline if two blank lines are entered
          if ( code.find( "\n\n\n" ) != string::npos )
              return ";";
          char * line = shellReadline( "... " , 1 );
          if ( gotInterrupted ) {
              if ( line )
                  free( line );
              return "";
          }
          if ( ! line )
              return "";
  
          while ( startsWith( line, "... " ) )
              line += 4;
  
          code += line;
          free( line );
      }
      return code;
  }
  
  #include <boost/program_options.hpp>
  namespace po = boost::program_options;
  
  void show_help_text( const char* name, po::options_description options ) {
      cout << "MongoDB shell version: " << mongo::versionString << endl;
      cout << "usage: " << name << " [options] [db address] [file names (ending in .js)]" << endl
           << "db address can be:" << endl
           << "  foo                   foo database on local machine" << endl
           << "  192.169.0.5/foo       foo database on 192.168.0.5 machine" << endl
           << "  192.169.0.5:9999/foo  foo database on 192.168.0.5 machine on port 9999" << endl
           << options << endl
           << "file names: a list of files to run. files have to end in .js and will exit after "
           << "unless --shell is specified" << endl;
  };
  
  bool fileExists( string file ) {
      try {
          boost::filesystem::path p( file );
          return boost::filesystem::exists( file );
      }
      catch ( ... ) {
          return false;
      }
  }
  
  namespace mongo {
      extern bool isShell;
      extern DBClientWithCommands *latestConn;
  }
  
  string sayReplSetMemberState() {
      try {
          if( latestConn ) {
              BSONObj info;
              if( latestConn->runCommand( "admin", BSON( "replSetGetStatus" << 1 << "forShell" << 1 ) , info ) ) {
                  stringstream ss;
                  ss << info["set"].String() << ':';
                  
                  int s = info["myState"].Int();
                  MemberState ms( s );
                  ss << ms.toString();
  
                  return ss.str();
              }
              else {
                  string s = info.getStringField( "info" );
                  if( s.size() < 20 )
                      return s; // "mongos", "configsvr"
              }
          }
      }
      catch( std::exception& e ) {
          log( 1 ) << "error in sayReplSetMemberState:" << e.what() << endl;
      }
      return "";
  }
  
  /**
   * Edit a variable or input buffer text in an external editor -- EDITOR must be defined
   *
   * @param whatToEdit Name of JavaScript variable to be edited, or any text string
   */
  static void edit( const string& whatToEdit ) {
  
      // EDITOR may be defined in the JavaScript scope or in the environment
      string editor;
      if ( shellMainScope->type( "EDITOR" ) == String ) {
          editor = shellMainScope->getString( "EDITOR" );
      }
      else {
          static const char * editorFromEnv = getenv( "EDITOR" );
          if ( editorFromEnv ) {
              editor = editorFromEnv;
          }
      }
      if ( editor.empty() ) {
          cout << "please define EDITOR as a JavaScript string or as an environment variable" << endl;
          return;
      }
  
      // "whatToEdit" might look like a variable/property name
      bool editingVariable = true;
      for ( const char* p = whatToEdit.c_str(); *p; ++p ) {
          if ( ! ( isalnum( *p ) || *p == '_' || *p == '.' ) ) {
              editingVariable = false;
              break;
          }
      }
  
      string js;
      if ( editingVariable ) {
          // Convert "whatToEdit" to JavaScript (JSON) text
          if ( !shellMainScope->exec( "__jsout__ = tojson(" + whatToEdit + ")", "tojs", false, false, false ) )
              return; // Error already printed
  
          js = shellMainScope->getString( "__jsout__" );
  
          if ( strstr( js.c_str(), "[native code]" ) ) {
              cout << "can't edit native functions" << endl;
              return;
          }
      }
      else {
          js = whatToEdit;
      }
  
      // Pick a name to use for the temp file
      string filename;
      const int maxAttempts = 10;
      int i;
      for ( i = 0; i < maxAttempts; ++i ) {
          StringBuilder sb;
  #ifdef _WIN32
          char tempFolder[MAX_PATH];
          GetTempPathA( sizeof tempFolder, tempFolder );
          sb << tempFolder << "mongo_edit" << time( 0 ) + i << ".js";
  #else
          sb << "/tmp/mongo_edit" << time( 0 ) + i << ".js";
  #endif
          filename = sb.str();
          if ( ! fileExists( filename ) )
              break;
      }
      if ( i == maxAttempts ) {
          cout << "couldn't create unique temp file after " << maxAttempts << " attempts" << endl;
          return;
      }
  
      // Create the temp file
      FILE * tempFileStream;
      tempFileStream = fopen( filename.c_str(), "wt" );
      if ( ! tempFileStream ) {
          cout << "couldn't create temp file (" << filename << "): " << errnoWithDescription() << endl;
          return;
      }
  
      // Write JSON into the temp file
      size_t fileSize = js.size();
      if ( fwrite( js.data(), sizeof( char ), fileSize, tempFileStream ) != fileSize ) {
          int systemErrno = errno;
          cout << "failed to write to temp file: " << errnoWithDescription( systemErrno ) << endl;
          fclose( tempFileStream );
          remove( filename.c_str() );
          return;
      }
      fclose( tempFileStream );
  
      // Pass file to editor
      StringBuilder sb;
      sb << editor << " " << filename;
      int ret = ::system( sb.str().c_str() );
      if ( ret ) {
          if ( ret == -1 ) {
              int systemErrno = errno;
              cout << "failed to launch $EDITOR (" << editor << "): " << errnoWithDescription( systemErrno ) << endl;
          }
          else
              cout << "editor exited with error (" << ret << "), not applying changes" << endl;
          remove( filename.c_str() );
          return;
      }
  
      // The editor gave return code zero, so read the file back in
      tempFileStream = fopen( filename.c_str(), "rt" );
      if ( ! tempFileStream ) {
          cout << "couldn't open temp file on return from editor: " << errnoWithDescription() << endl;
          remove( filename.c_str() );
          return;
      }
      sb.reset();
      int bytes;
      do {
          char buf[1024];
          bytes = fread( buf, sizeof( char ), sizeof buf, tempFileStream );
          if ( ferror( tempFileStream ) ) {
              cout << "failed to read temp file: " << errnoWithDescription() << endl;
              fclose( tempFileStream );
              remove( filename.c_str() );
              return;
          }
          sb.append( StringData( buf, bytes ) );
      } while ( bytes );
  
      // Done with temp file, close and delete it
      fclose( tempFileStream );
      remove( filename.c_str() );
  
      if ( editingVariable ) {
          // Try to execute assignment to copy edited value back into the variable
          const string code = whatToEdit + string( " = " ) + sb.str();
          if ( !shellMainScope->exec( code, "tojs", false, false, false ) )
              return; // Error already printed
      }
      else {
          linenoisePreloadBuffer( sb.str().c_str() );
      }
  }
  
  int _main( int argc, char* argv[] ) {
      mongo::isShell = true;
      setupSignals();
  
      mongo::shellUtils::RecordMyLocation( argv[ 0 ] );
  
      string url = "test";
      string dbhost;
      string port;
      vector<string> files;
  
      string username;
      string password;
  
      bool runShell = false;
      bool nodb = false;
      bool norc = false;
  
      string script;
  
      po::options_description shell_options( "options" );
      po::options_description hidden_options( "Hidden options" );
      po::options_description cmdline_options( "Command line options" );
      po::positional_options_description positional_options;
  
      shell_options.add_options()
      ( "shell", "run the shell after executing files" )
      ( "nodb", "don't connect to mongod on startup - no 'db address' arg expected" )
      ( "norc", "will not run the \".mongorc.js\" file on start up" )
      ( "quiet", "be less chatty" )
      ( "port", po::value<string>( &port ), "port to connect to" )
      ( "host", po::value<string>( &dbhost ), "server to connect to" )
      ( "eval", po::value<string>( &script ), "evaluate javascript" )
      ( "username,u", po::value<string>(&username), "username for authentication" )
      ( "password,p", new mongo::PasswordValue( &password ), "password for authentication" )
      ( "help,h", "show this usage information" )
      ( "version", "show version information" )
      ( "verbose", "increase verbosity" )
      ( "ipv6", "enable IPv6 support (disabled by default)" )
  #ifdef MONGO_SSL
      ( "ssl", "use all for connections" )
  #endif
      ;
  
      hidden_options.add_options()
      ( "dbaddress", po::value<string>(), "dbaddress" )
      ( "files", po::value< vector<string> >(), "files" )
      ( "nokillop", "nokillop" ) // for testing, kill op will also be disabled automatically if the tests starts a mongo program
      ( "autokillop", "autokillop" ) // for testing, will kill op without prompting
      ;
  
      positional_options.add( "dbaddress", 1 );
      positional_options.add( "files", -1 );
  
      cmdline_options.add( shell_options ).add( hidden_options );
  
      po::variables_map params;
  
      /* using the same style as db.cpp uses because eventually we're going
       * to merge some of this stuff. */
      int command_line_style = (((po::command_line_style::unix_style ^
                                  po::command_line_style::allow_guessing) |
                                 po::command_line_style::allow_long_disguise) ^
                                po::command_line_style::allow_sticky);
  
      try {
          po::store(po::command_line_parser(argc, argv).options(cmdline_options).
                    positional(positional_options).
                    style(command_line_style).run(), params);
          po::notify( params );
      }
      catch ( po::error &e ) {
          cout << "ERROR: " << e.what() << endl << endl;
          show_help_text( argv[0], shell_options );
          return mongo::EXIT_BADOPTIONS;
      }
  
      // hide password from ps output
      for ( int i = 0; i < (argc-1); ++i ) {
          if ( !strcmp(argv[i], "-p") || !strcmp( argv[i], "--password" ) ) {
              char* arg = argv[i + 1];
              while ( *arg ) {
                  *arg++ = 'x';
              }
          }
      }
  
      if ( params.count( "shell" ) ) {
          runShell = true;
      }
      if ( params.count( "nodb" ) ) {
          nodb = true;
      }
      if ( params.count( "norc" ) ) {
          norc = true;
      }
      if ( params.count( "help" ) ) {
          show_help_text( argv[0], shell_options );
          return mongo::EXIT_CLEAN;
      }
      if ( params.count( "files" ) ) {
          files = params["files"].as< vector<string> >();
      }
      if ( params.count( "version" ) ) {
          cout << "MongoDB shell version: " << mongo::versionString << endl;
          return mongo::EXIT_CLEAN;
      }
      if ( params.count( "quiet" ) ) {
          mongo::cmdLine.quiet = true;
      }
  #ifdef MONGO_SSL
      if ( params.count( "ssl" ) ) {
          mongo::cmdLine.sslOnNormalPorts = true;
      }
  #endif
      if ( params.count( "nokillop" ) ) {
          mongo::shellUtils::_nokillop = true;
      }
      if ( params.count( "autokillop" ) ) {
          autoKillOp = true;
      }
  
      /* This is a bit confusing, here are the rules:
       *
       * if nodb is set then all positional parameters are files
       * otherwise the first positional parameter might be a dbaddress, but
       * only if one of these conditions is met:
       *   - it contains no '.' after the last appearance of '\' or '/'
       *   - it doesn't end in '.js' and it doesn't specify a path to an existing file */
      if ( params.count( "dbaddress" ) ) {
          string dbaddress = params["dbaddress"].as<string>();
          if (nodb) {
              files.insert( files.begin(), dbaddress );
          }
          else {
              string basename = dbaddress.substr( dbaddress.find_last_of( "/\\" ) + 1 );
              if (basename.find_first_of( '.' ) == string::npos ||
                      ( basename.find( ".js", basename.size() - 3 ) == string::npos && !fileExists( dbaddress ) ) ) {
                  url = dbaddress;
              }
              else {
                  files.insert( files.begin(), dbaddress );
              }
          }
      }
      if ( params.count( "ipv6" ) ) {
          mongo::enableIPv6();
      }
      if ( params.count( "verbose" ) ) {
          logLevel = 1;
      }
  
      if ( url == "*" ) {
          cout << "ERROR: " << "\"*\" is an invalid db address" << endl << endl;
          show_help_text( argv[0], shell_options );
          return mongo::EXIT_BADOPTIONS;
      }
  
      if ( ! mongo::cmdLine.quiet )
          cout << "MongoDB shell version: " << mongo::versionString << endl;
  
      mongo::UnitTest::runTests();
  
      if ( !nodb ) { // connect to db
          //if ( ! mongo::cmdLine.quiet ) cout << "url: " << url << endl;
  
          stringstream ss;
          if ( mongo::cmdLine.quiet )
              ss << "__quiet = true;";
          ss << "db = connect( \"" << fixHost( url , dbhost , port ) << "\")";
  
          mongo::shellUtils::_dbConnect = ss.str();
  
          if ( params.count( "password" ) && password.empty() )
              password = mongo::askPassword();
  
          if ( username.size() && password.size() ) {
              stringstream ss;
              ss << "if ( ! db.auth( \"" << username << "\" , \"" << password << "\" ) ){ throw 'login failed'; }";
              mongo::shellUtils::_dbAuth = ss.str();
          }
      }
  
      mongo::ScriptEngine::setConnectCallback( mongo::shellUtils::onConnect );
      mongo::ScriptEngine::setup();
      mongo::globalScriptEngine->setScopeInitCallback( mongo::shellUtils::initScope );
      auto_ptr< mongo::Scope > scope( mongo::globalScriptEngine->newScope() );
      shellMainScope = scope.get();
  
      if( runShell )
          cout << "type \"help\" for help" << endl;
  
      if ( !script.empty() ) {
          mongo::shellUtils::MongoProgramScope s;
          if ( ! scope->exec( script , "(shell eval)" , true , true , false ) )
              return -4;
      }
  
      for (size_t i = 0; i < files.size(); ++i) {
          mongo::shellUtils::MongoProgramScope s;
  
          if ( files.size() > 1 )
              cout << "loading file: " << files[i] << endl;
  
          if ( ! scope->execFile( files[i] , false , true , false ) ) {
              cout << "failed to load: " << files[i] << endl;
              return -3;
          }
      }
  
      if ( files.size() == 0 && script.empty() )
          runShell = true;
  
      if ( runShell ) {
  
          mongo::shellUtils::MongoProgramScope s;
  
          if ( !norc ) {
              string rcLocation;
  #ifndef _WIN32
              if ( getenv( "HOME" ) != NULL )
                  rcLocation = str::stream() << getenv( "HOME" ) << "/.mongorc.js" ;
  #else
              if ( getenv( "HOMEDRIVE" ) != NULL && getenv( "HOMEPATH" ) != NULL )
                  rcLocation = str::stream() << getenv( "HOMEDRIVE" ) << getenv( "HOMEPATH" ) << "\\.mongorc.js";
  #endif
              if ( !rcLocation.empty() && fileExists(rcLocation) ) {
                  if ( ! scope->execFile( rcLocation , false , true , false , 0 ) ) {
                      cout << "The \".mongorc.js\" file located in your home folder could not be executed" << endl;
                      return -5;
                  }
              }
          }
  
          shellHistoryInit();
  
          string prompt;
          int promptType; 
  
          //v8::Handle<v8::Object> shellHelper = baseContext_->Global()->Get( v8::String::New( "shellHelper" ) )->ToObject();
  
          while ( 1 ) {
              inMultiLine = false;
              gotInterrupted = false;
  //            shellMainScope->localConnect;
              //DBClientWithCommands *c = getConnection( JSContext *cx, JSObject *obj );
  
              bool haveStringPrompt = false;
              promptType = scope->type( "prompt" );
              if( promptType == String ) {
                  prompt = scope->getString( "prompt" );
                  haveStringPrompt = true;
              }
              else if( promptType == Code ) {
                  scope->exec( "delete __prompt__;", "", false, false, false, 0 );
                  scope->exec( "__prompt__ = prompt();", "", false, false, false, 0 );
                  if( scope->type( "__prompt__" ) == String ) {
                      prompt = scope->getString( "__prompt__" );
                      haveStringPrompt = true;
                  }
              }
              if( !haveStringPrompt )
                  prompt = sayReplSetMemberState() + "> ";
  
              char * line = shellReadline( prompt.c_str() );
  
              char * linePtr = line;  // can't clobber 'line', we need to free() it later
              if ( linePtr ) {
                  while ( linePtr[0] == ' ' )
                      ++linePtr;
                  int lineLen = strlen( linePtr );
                  while ( lineLen > 0 && linePtr[lineLen - 1] == ' ' )
                      linePtr[--lineLen] = 0;
              }
  
              if ( ! linePtr || ( strlen( linePtr ) == 4 && strstr( linePtr , "exit" ) ) ) {
                  if ( ! mongo::cmdLine.quiet )
                      cout << "bye" << endl;
                  if ( line )
                      free( line );
                  break;
              }
  
              string code = linePtr;
              if ( code == "exit" || code == "exit;" ) {
                  free( line );
                  break;
              }
              if ( code == "cls" ) {
                  free( line );
                  linenoiseClearScreen();
                  continue;
              }
  
              if ( code.size() == 0 ) {
                  free( line );
                  continue;
              }
  
              if ( startsWith( linePtr, "edit " ) ) {
                  shellHistoryAdd( linePtr );
  
                  const char* s = linePtr + 5; // skip "edit "
                  while( *s && isspace( *s ) )
                      s++;
  
                  edit( s );
                  free( line );
                  continue;
              }
  
              gotInterrupted = false;
              code = finishCode( code );
              if ( gotInterrupted ) {
                  cout << endl;
                  free( line );
                  continue;
              }
  
              if ( code.size() == 0 ) {
                  free( line );
                  break;
              }
  
              bool wascmd = false;
              {
                  string cmd = linePtr;
                  if ( cmd.find( " " ) > 0 )
                      cmd = cmd.substr( 0 , cmd.find( " " ) );
  
                  if ( cmd.find( "\"" ) == string::npos ) {
                      try {
                          scope->exec( (string)"__iscmd__ = shellHelper[\"" + cmd + "\"];" , "(shellhelp1)" , false , true , true );
                          if ( scope->getBoolean( "__iscmd__" )  ) {
                              scope->exec( (string)"shellHelper( \"" + cmd + "\" , \"" + code.substr( cmd.size() ) + "\");" , "(shellhelp2)" , false , true , false );
                              wascmd = true;
                          }
                      }
                      catch ( std::exception& e ) {
                          cout << "error2:" << e.what() << endl;
                          wascmd = true;
                      }
                  }
              }
  
              if ( ! wascmd ) {
                  try {
                      if ( scope->exec( code.c_str() , "(shell)" , false , true , false ) )
                          scope->exec( "shellPrintHelper( __lastres__ );" , "(shell2)" , true , true , false );
                  }
                  catch ( std::exception& e ) {
                      cout << "error:" << e.what() << endl;
                  }
              }
  
              shellHistoryAdd( code.c_str() );
              free( line );
          }
  
          shellHistoryDone();
      }
  
      mongo::dbexitCalled = true;
      return 0;
  }
  
  int main( int argc, char* argv[] ) {
      static mongo::StaticObserver staticObserver;
      try {
          return _main( argc , argv );
      }
      catch ( mongo::DBException& e ) {
          cerr << "exception: " << e.what() << endl;
          return -1;
      }
  }
  