src/amuleAppCommon.cpp

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2003-2011 aMule Team ( admin@amule.org / http://www.amule.org )
   5 //
   6 // Any parts of this program derived from the xMule, lMule or eMule project,
   7 // or contributed by third-party developers are copyrighted by their
   8 // respective authors.
   9 //
  10 // This program is free software; you can redistribute it and/or modify
  11 // it under the terms of the GNU General Public License as published by
  12 // the Free Software Foundation; either version 2 of the License, or
  13 // (at your option) any later version.
  14 //
  15 // This program is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19 //
  20 // You should have received a copy of the GNU General Public License
  21 // along with this program; if not, write to the Free Software
  22 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  23 //
  24
  25 //
  26 // This file is for functions common to all three apps (amule, amuled, amulegui),
  27 // but preprocessor-dependent (using theApp, thePrefs), so it is compiled seperately for each app.
  28 //
  29
  30
  31 #include <wx/wx.h>
  32 #include <wx/cmdline.h>                 // Needed for wxCmdLineParser
  33 #include <wx/snglinst.h>                // Needed for wxSingleInstanceChecker
  34 #include <wx/textfile.h>                // Needed for wxTextFile
  35 #include <wx/config.h>                  // Do_not_auto_remove (win32)
  36 #include <wx/fileconf.h>
  37
  38 #include "amule.h"                              // Interface declarations.
  39 #include <common/Format.h>              // Needed for CFormat
  40 #include "CFile.h"                              // Needed for CFile
  41 #include "ED2KLink.h"                   // Needed for command line passing of links
  42 #include "FileLock.h"                   // Needed for CFileLock
  43 #include "GuiEvents.h"                  // Needed for Notify_*
  44 #include "KnownFile.h"
  45 #include "Logger.h"
  46 #include "MagnetURI.h"                  // Needed for CMagnetURI
  47 #include "Preferences.h"
  48 #include "ScopedPtr.h"
  49
  50 #ifndef CLIENT_GUI
  51 #include "DownloadQueue.h"
  52 #endif
  53
  54 CamuleAppCommon::CamuleAppCommon()
  55 {
  56         m_singleInstance = NULL;
  57         ec_config = false;
  58         m_geometryEnabled = false;
  59         if (IsRemoteGui()) {
  60                 m_appName               = wxT("aMuleGUI");
  61                 m_configFile    = wxT("remote.conf");
  62                 m_logFile               = wxT("remotelogfile");
  63         } else {
  64                 m_configFile    = wxT("amule.conf");
  65                 m_logFile               = wxT("logfile");
  66
  67                 if (IsDaemon()) {
  68                         m_appName       = wxT("aMuleD");
  69                 } else {
  70                         m_appName       = wxT("aMule");
  71                 }
  72         }
  73 }
  74
  75 CamuleAppCommon::~CamuleAppCommon()
  76 {
  77 #if defined(__WXMAC__) && defined(AMULE_DAEMON)
  78         //#warning TODO: fix wxSingleInstanceChecker for amuled on Mac (wx link problems)
  79 #else
  80         delete m_singleInstance;
  81 #endif
  82 }
  83
  84 void CamuleAppCommon::RefreshSingleInstanceChecker()
  85 {
  86 #if defined(__WXMAC__) && defined(AMULE_DAEMON)
  87         //#warning TODO: fix wxSingleInstanceChecker for amuled on Mac (wx link problems)
  88 #else
  89         delete m_singleInstance;
  90         m_singleInstance = new wxSingleInstanceChecker(wxT("muleLock"), thePrefs::GetConfigDir());
  91 #endif
  92 }
  93
  94 void CamuleAppCommon::AddLinksFromFile()
  95 {
  96         const wxString fullPath = thePrefs::GetConfigDir() + wxT("ED2KLinks");
  97         if (!wxFile::Exists(fullPath)) {
  98                 return;
  99         }
 100
 101         // Attempt to lock the ED2KLinks file.
 102         CFileLock lock((const char*)unicode2char(fullPath));
 103
 104         wxTextFile file(fullPath);
 105         if ( file.Open() ) {
 106                 for ( unsigned int i = 0; i < file.GetLineCount(); i++ ) {
 107                         wxString line = file.GetLine( i ).Strip( wxString::both );
 108
 109                         if ( !line.IsEmpty() ) {
 110                                 // Special case! used by a secondary running mule to raise this one.
 111                                 if (line == wxT("RAISE_DIALOG")) {
 112                                         Notify_ShowGUI();
 113                                         continue;
 114                                 }
 115                                 unsigned long category = 0;
 116                                 if (line.AfterLast(wxT(':')).ToULong(&category) == true) {
 117                                         line = line.BeforeLast(wxT(':'));
 118                                 } else { // If ToULong returns false the category still can have been changed!
 119                                                  // This is fixed in wx 2.9
 120                                         category = 0;
 121                                 }
 122                                 theApp->downloadqueue->AddLink(line, category);
 123                         }
 124                 }
 125
 126                 file.Close();
 127         } else {
 128                 AddLogLineNS(_("Failed to open ED2KLinks file."));
 129         }
 130
 131         // Delete the file.
 132         wxRemoveFile(thePrefs::GetConfigDir() + wxT("ED2KLinks"));
 133 }
 134
 135
 136 // Returns a magnet ed2k URI
 137 wxString CamuleAppCommon::CreateMagnetLink(const CAbstractFile *f)
 138 {
 139         CMagnetURI uri;
 140
 141         uri.AddField(wxT("dn"), f->GetFileName().Cleanup(false).GetPrintable());
 142         uri.AddField(wxT("xt"), wxString(wxT("urn:ed2k:")) + f->GetFileHash().Encode().Lower());
 143         uri.AddField(wxT("xt"), wxString(wxT("urn:ed2khash:")) + f->GetFileHash().Encode().Lower());
 144         uri.AddField(wxT("xl"), CFormat(wxT("%d")) % f->GetFileSize());
 145
 146         return uri.GetLink();
 147 }
 148
 149
 150 // Returns a ed2k file URL
 151 wxString CamuleAppCommon::CreateED2kLink(const CAbstractFile *f, bool add_source, bool use_hostname, bool add_cryptoptions, bool add_AICH)
 152 {
 153         wxASSERT(!(!add_source && (use_hostname || add_cryptoptions)));
 154         // Construct URL like this: ed2k://|file|<filename>|<size>|<hash>|/
 155         wxString strURL = CFormat(wxT("ed2k://|file|%s|%i|%s|"))
 156                 % f->GetFileName().Cleanup(false)
 157                 % f->GetFileSize() % f->GetFileHash().Encode();
 158
 159         // Append the AICH info
 160         if (add_AICH) {
 161                 const CKnownFile* kf = dynamic_cast<const CKnownFile*>(f);
 162                 if (kf && kf->HasProperAICHHashSet()) {
 163                         strURL << wxT("h=") << kf->GetAICHMasterHash() << wxT("|");
 164                 }
 165         }
 166
 167         strURL << wxT("/");
 168
 169         if (add_source && theApp->IsConnected() && !theApp->IsFirewalled()) {
 170                 // Create the first part of the URL
 171                 strURL << wxT("|sources,");
 172                 if (use_hostname) {
 173                         strURL << thePrefs::GetYourHostname();
 174                 } else {
 175                         uint32 clientID = theApp->GetID();
 176                         strURL = CFormat(wxT("%s%u.%u.%u.%u"))
 177                                 % strURL
 178                                 % (clientID & 0xff)
 179                                 % ((clientID >> 8) & 0xff)
 180                                 % ((clientID >> 16) & 0xff)
 181                                 % ((clientID >> 24) & 0xff);
 182                 }
 183
 184                 strURL << wxT(":") <<
 185                         thePrefs::GetPort();
 186
 187                 if (add_cryptoptions) {
 188                         uint8 uSupportsCryptLayer = thePrefs::IsClientCryptLayerSupported() ? 1 : 0;
 189                         uint8 uRequestsCryptLayer = thePrefs::IsClientCryptLayerRequested() ? 1 : 0;
 190                         uint8 uRequiresCryptLayer = thePrefs::IsClientCryptLayerRequired() ? 1 : 0;
 191                         uint16 byCryptOptions = (uRequiresCryptLayer << 2) | (uRequestsCryptLayer << 1) | (uSupportsCryptLayer << 0) | (uSupportsCryptLayer ? 0x80 : 0x00);
 192
 193                         strURL << wxT(":") << byCryptOptions;
 194
 195                         if (byCryptOptions & 0x80) {
 196                                 strURL << wxT(":") << thePrefs::GetUserHash().Encode();
 197                         }
 198                 }
 199                 strURL << wxT("|/");
 200         } else if (add_source) {
 201                 AddLogLineC(_("WARNING: You can't add yourself as a source for an eD2k link while having a lowid."));
 202         }
 203
 204         // Result is "ed2k://|file|<filename>|<size>|<hash>|[h=<AICH master hash>|]/|sources,[(<ip>|<hostname>):<port>[:cryptoptions[:hash]]]|/"
 205         return strURL;
 206 }
 207
 208
 209 bool CamuleAppCommon::InitCommon(int argc, wxChar ** argv)
 210 {
 211         theApp->SetAppName(wxT("aMule"));
 212         FullMuleVersion = GetFullMuleVersion();
 213         OSDescription = wxGetOsDescription();
 214         OSType = OSDescription.BeforeFirst( wxT(' ') );
 215         if ( OSType.IsEmpty() ) {
 216                 OSType = wxT("Unknown");
 217         }
 218
 219         // Parse cmdline arguments.
 220         wxCmdLineParser cmdline(argc, argv);
 221
 222         // Handle these arguments.
 223         cmdline.AddSwitch(wxT("v"), wxT("version"), wxT("Displays the current version number."));
 224         cmdline.AddSwitch(wxT("h"), wxT("help"), wxT("Displays this information."));
 225         cmdline.AddOption(wxT("c"), wxT("config-dir"), wxT("read config from <dir> instead of home"));
 226 #ifdef AMULE_DAEMON
 227         cmdline.AddSwitch(wxT("f"), wxT("full-daemon"), wxT("Fork to background."));
 228         cmdline.AddOption(wxT("p"), wxT("pid-file"), wxT("After fork, create a pid-file in the given fullname file."));
 229         cmdline.AddSwitch(wxT("e"), wxT("ec-config"), wxT("Configure EC (External Connections)."));
 230 #else
 231
 232 #ifdef __WINDOWS__
 233         // MSW shows help otions in a dialog box, and the formatting doesn't fit there
 234 #define HELPTAB wxT("\t")
 235 #else
 236 #define HELPTAB wxT("\t\t\t")
 237 #endif
 238
 239         cmdline.AddOption(wxT("geometry"), wxEmptyString,
 240                         wxT("Sets the geometry of the app.\n")
 241                         HELPTAB wxT("<str> uses the same format as standard X11 apps:\n")
 242                         HELPTAB wxT("[=][<width>{xX}<height>][{+-}<xoffset>{+-}<yoffset>]"));
 243 #endif // !AMULE_DAEMON
 244
 245         cmdline.AddSwitch(wxT("o"), wxT("log-stdout"), wxT("Print log messages to stdout."));
 246         cmdline.AddSwitch(wxT("r"), wxT("reset-config"), wxT("Resets config to default values."));
 247
 248 #ifdef CLIENT_GUI
 249         cmdline.AddSwitch(wxT("s"), wxT("skip"), wxT("Skip connection dialog."));
 250 #else
 251         // Change webserver path. This is also a config option, so this switch will go at some time.
 252         cmdline.AddOption(wxT("w"), wxT("use-amuleweb"), wxT("Specify location of amuleweb binary."));
 253 #endif
 254 #ifndef __WINDOWS__
 255         cmdline.AddSwitch(wxT("d"), wxT("disable-fatal"), wxT("Do not handle fatal exception."));
 256 // Keep stdin open to run valgrind --gen_suppressions
 257         cmdline.AddSwitch(wxT("i"), wxT("enable-stdin"), wxT("Do not disable stdin."));
 258 #endif
 259
 260         // Allow passing of links to the app
 261         cmdline.AddOption(wxT("t"), wxT("category"), wxT("Set category for passed ED2K links."), wxCMD_LINE_VAL_NUMBER);
 262         cmdline.AddParam(wxT("ED2K link"), wxCMD_LINE_VAL_STRING, wxCMD_LINE_PARAM_OPTIONAL | wxCMD_LINE_PARAM_MULTIPLE);
 263
 264         // wx asserts in debug mode if there is a check for an option that wasn't added.
 265         // So we have to wrap around the same #ifdefs as above. >:(
 266
 267         // Show help on --help or invalid commands
 268         if ( cmdline.Parse() ) {
 269                 return false;
 270         } else if (cmdline.Found(wxT("help"))) {
 271                 cmdline.Usage();
 272                 return false;
 273         }
 274
 275         if ( cmdline.Found(wxT("version"))) {
 276                 // This looks silly with logging macros that add a timestamp.
 277                 printf("%s\n", (const char*)unicode2char(wxString(CFormat(wxT("%s (OS: %s)")) % FullMuleVersion % OSType)));
 278                 return false;
 279         }
 280
 281         wxString configdir;
 282         if (cmdline.Found(wxT("config-dir"), &configdir)) {
 283                 // Make an absolute path from the config dir
 284                 wxFileName fn(configdir);
 285                 fn.MakeAbsolute();
 286                 configdir = fn.GetFullPath();
 287                 if (configdir.Last() != wxFileName::GetPathSeparator()) {
 288                         configdir += wxFileName::GetPathSeparator();
 289                 }
 290                 thePrefs::SetConfigDir(configdir);
 291         } else {
 292                 thePrefs::SetConfigDir(/*OtherFunctions::*/GetConfigDir());
 293         }
 294
 295         // Backtracing works in MSW.
 296         // Problem is just that the backtraces are useless, because apparently the context gets lost
 297         // in the try/catch somewhere.
 298         // So leave it out.
 299 #ifndef __WINDOWS__
 300         #if wxUSE_ON_FATAL_EXCEPTION
 301                 if ( !cmdline.Found(wxT("disable-fatal")) ) {
 302                         // catch fatal exceptions
 303                         wxHandleFatalExceptions(true);
 304                 }
 305         #endif
 306 #endif
 307
 308         theLogger.SetEnabledStdoutLog(cmdline.Found(wxT("log-stdout")));
 309 #ifdef AMULE_DAEMON
 310         enable_daemon_fork = cmdline.Found(wxT("full-daemon"));
 311         if ( cmdline.Found(wxT("pid-file"), &m_PidFile) ) {
 312                 // Remove any existing PidFile
 313                 if ( wxFileExists (m_PidFile) ) wxRemoveFile (m_PidFile);
 314         }
 315         ec_config = cmdline.Found(wxT("ec-config"));
 316 #else
 317         enable_daemon_fork = false;
 318
 319         // Default geometry of the GUI. Can be changed with a cmdline argument...
 320         if ( cmdline.Found(wxT("geometry"), &m_geometryString) ) {
 321                 m_geometryEnabled = true;
 322         }
 323 #endif
 324
 325         if (theLogger.IsEnabledStdoutLog()) {
 326                 if ( enable_daemon_fork ) {
 327                         AddLogLineNS(wxT("Daemon will fork to background - log to stdout disabled"));   // localization not active yet
 328                         theLogger.SetEnabledStdoutLog(false);
 329                 } else {
 330                         AddLogLineNS(wxT("Logging to stdout enabled"));
 331                 }
 332         }
 333
 334         AddLogLineNS(wxT("Initialising ") + FullMuleVersion);
 335
 336         // Ensure that "~/.aMule/" is accessible.
 337         CPath outDir;
 338         if (!CheckMuleDirectory(wxT("configuration"), CPath(thePrefs::GetConfigDir()), wxEmptyString, outDir)) {
 339                 return false;
 340         }
 341
 342         if (cmdline.Found(wxT("reset-config"))) {
 343                 // Make a backup first.
 344                 wxRemoveFile(thePrefs::GetConfigDir() + m_configFile + wxT(".backup"));
 345                 wxRenameFile(thePrefs::GetConfigDir() + m_configFile, thePrefs::GetConfigDir() + m_configFile + wxT(".backup"));
 346                 AddLogLineNS(CFormat(wxT("Your settings have been reset to default values.\nThe old config file has been saved as %s.backup\n")) % m_configFile);
 347         }
 348
 349         size_t linksPassed = cmdline.GetParamCount();   // number of links from the command line
 350         // cppcheck-suppress variableScope
 351         int linksActuallyPassed = 0;                                    // number of links that pass the syntax check
 352         if (linksPassed) {
 353                 long cat = 0;
 354                 if (!cmdline.Found(wxT("t"), &cat)) {
 355                         cat = 0;
 356                 }
 357
 358                 wxTextFile ed2kFile(thePrefs::GetConfigDir() + wxT("ED2KLinks"));
 359                 if (!ed2kFile.Exists()) {
 360                         ed2kFile.Create();
 361                 }
 362                 if (ed2kFile.Open()) {
 363                         for (size_t i = 0; i < linksPassed; i++) {
 364                                 wxString link;
 365                                 if (CheckPassedLink(cmdline.GetParam(i), link, cat)) {
 366                                         ed2kFile.AddLine(link);
 367                                         linksActuallyPassed++;
 368                                 }
 369                         }
 370                         ed2kFile.Write();
 371                 } else {
 372                         AddLogLineCS(wxT("Failed to open 'ED2KLinks', cannot add links."));
 373                 }
 374         }
 375
 376 #if defined(__WXMAC__) && defined(AMULE_DAEMON)
 377         //#warning TODO: fix wxSingleInstanceChecker for amuled on Mac (wx link problems)
 378         AddLogLineCS(wxT("WARNING: The check for other instances is currently disabled in amuled.\n"
 379                 "Please make sure that no other instance of aMule is running or your files might be corrupted.\n"));
 380 #else
 381         AddLogLineNS(wxT("Checking if there is an instance already running..."));
 382
 383         m_singleInstance = new wxSingleInstanceChecker();
 384         wxString lockfile = IsRemoteGui() ? wxT("muleLockRGUI") : wxT("muleLock");
 385         if (m_singleInstance->Create(lockfile, thePrefs::GetConfigDir())
 386                 && m_singleInstance->IsAnotherRunning()) {
 387                 AddLogLineCS(CFormat(wxT("There is an instance of %s already running")) % m_appName);
 388                 AddLogLineNS(CFormat(wxT("(lock file: %s%s)")) % thePrefs::GetConfigDir() % lockfile);
 389                 if (linksPassed) {
 390                         AddLogLineNS(CFormat(wxT("passed %d %s to it, finished")) % linksActuallyPassed
 391                                 % (linksPassed == 1 ? wxT("link") : wxT("links")));
 392                         return false;
 393                 }
 394
 395                 // This is very tricky. The most secure way to communicate is via ED2K links file
 396                 wxTextFile ed2kFile(thePrefs::GetConfigDir() + wxT("ED2KLinks"));
 397                 if (!ed2kFile.Exists()) {
 398                         ed2kFile.Create();
 399                 }
 400
 401                 if (ed2kFile.Open()) {
 402                         ed2kFile.AddLine(wxT("RAISE_DIALOG"));
 403                         ed2kFile.Write();
 404
 405                         AddLogLineNS(wxT("Raising current running instance."));
 406                 } else {
 407                         AddLogLineCS(wxT("Failed to open 'ED2KFile', cannot signal running instance."));
 408                 }
 409
 410                 return false;
 411         } else {
 412                 AddLogLineNS(wxT("No other instances are running."));
 413         }
 414 #endif
 415
 416 #ifndef __WINDOWS__
 417         // Close standard-input
 418         if ( !cmdline.Found(wxT("enable-stdin")) )      {
 419                 // The full daemon will close all std file-descriptors by itself,
 420                 // so closing it here would lead to the closing on the first open
 421                 // file, which is the logfile opened below
 422                 if (!enable_daemon_fork) {
 423                         close(0);
 424                 }
 425         }
 426 #endif
 427
 428         // Create the CFG file we shall use and set the config object as the global cfg file
 429         wxConfig::Set(new wxFileConfig( wxEmptyString, wxEmptyString, thePrefs::GetConfigDir() + m_configFile));
 430
 431         // Make a backup of the log file
 432         CPath logfileName = CPath(thePrefs::GetConfigDir() + m_logFile);
 433         if (logfileName.FileExists()) {
 434                 CPath::BackupFile(logfileName, wxT(".bak"));
 435         }
 436
 437         // Open the log file
 438         if (!theLogger.OpenLogfile(logfileName.GetRaw())) {
 439                 // use std err as last resolt to indicate problem
 440                 fputs("ERROR: unable to open log file\n", stderr);
 441                 // failure to open log is serious problem
 442                 return false;
 443         }
 444
 445         // Load Preferences
 446         CPreferences::BuildItemList(thePrefs::GetConfigDir());
 447         CPreferences::LoadAllItems( wxConfigBase::Get() );
 448
 449 #ifdef CLIENT_GUI
 450         m_skipConnectionDialog = cmdline.Found(wxT("skip"));
 451 #else
 452         wxString amulewebPath;
 453         if (cmdline.Found(wxT("use-amuleweb"), &amulewebPath)) {
 454                 thePrefs::SetWSPath(amulewebPath);
 455                 AddLogLineNS(CFormat(wxT("Using amuleweb in '%s'.")) % amulewebPath);
 456         }
 457 #endif
 458
 459         return true;
 460 }
 461
 462 /**
 463  * Returns a description of the version of aMule being used.
 464  *
 465  * @return A detailed description of the aMule version, including application
 466  *         name and wx information.
 467  */
 468 const wxString CamuleAppCommon::GetFullMuleVersion() const
 469 {
 470         return GetMuleAppName() + wxT(" ") + GetMuleVersion();
 471 }
 472
 473 bool CamuleAppCommon::CheckPassedLink(const wxString &in, wxString &out, int cat)
 474 {
 475         wxString link(in);
 476
 477         // restore ASCII-encoded pipes
 478         link.Replace(wxT("%7C"), wxT("|"));
 479         link.Replace(wxT("%7c"), wxT("|"));
 480
 481         if (link.compare(0, 7, wxT("magnet:")) == 0) {
 482                 link = CMagnetED2KConverter(link);
 483                 if (link.empty()) {
 484                         AddLogLineCS(CFormat(wxT("Cannot convert magnet link to eD2k: %s")) % in);
 485                         return false;
 486                 }
 487         }
 488
 489         try {
 490                 CScopedPtr<CED2KLink> uri(CED2KLink::CreateLinkFromUrl(link));
 491                 out = uri.get()->GetLink();
 492                 if (cat && uri.get()->GetKind() == CED2KLink::kFile) {
 493                         out += CFormat(wxT(":%d")) % cat;
 494                 }
 495                 return true;
 496         } catch ( const wxString& err ) {
 497                 AddLogLineCS(CFormat(wxT("Invalid eD2k link \"%s\" - ERROR: %s")) % link % err);
 498         }
 499         return false;
 500 }
 501
 502
 503 /**
 504  * Checks permissions on a aMule directory, creating if needed.
 505  *
 506  * @param desc A description of the directory in question, used for error messages.
 507  * @param directory The directory in question.
 508  * @param alternative If the dir specified with 'directory' could not be created, try this instead.
 509  * @param outDir Returns the used path.
 510  * @return False on error.
 511  */
 512 bool CamuleAppCommon::CheckMuleDirectory(const wxString& desc, const CPath& directory, const wxString& alternative, CPath& outDir)
 513 {
 514         wxString msg;
 515
 516         if (directory.IsDir(CPath::readwritable)) {
 517                 outDir = directory;
 518                 return true;
 519         } else if (directory.DirExists()) {
 520                 // Strings are not translated here because translation isn't up yet.
 521                 msg = CFormat(wxT("Permissions on the %s directory too strict!\n")
 522                         wxT("aMule cannot proceed. To fix this, you must set read/write/exec\n")
 523                         wxT("permissions for the folder '%s'"))
 524                                 % desc % directory;
 525         } else if (CPath::MakeDir(directory)) {
 526                 outDir = directory;
 527                 return true;
 528         } else {
 529                 msg << CFormat(wxT("Could not create the %s directory at '%s'."))
 530                         % desc % directory;
 531         }
 532
 533         // Attempt to use fallback directory.
 534         const CPath fallback(alternative);
 535         if (fallback.IsOk() && (directory != fallback)) {
 536                 msg << wxT("\nAttempting to use default directory at location \n'")
 537                         << alternative << wxT("'.");
 538                 if (theApp->ShowAlert(msg, wxT("Error accessing directory."), wxICON_ERROR | wxOK | wxCANCEL) == wxCANCEL) {
 539                         outDir = CPath(wxEmptyString);
 540                         return false;
 541                 }
 542
 543                 return CheckMuleDirectory(desc, fallback, wxEmptyString, outDir);
 544         }
 545
 546         theApp->ShowAlert(msg, wxT("Fatal error."), wxICON_ERROR | wxOK);
 547         outDir = CPath(wxEmptyString);
 548         return false;
 549 }