freespacechecker.cpp raw

   1  // Copyright (c) 2011-present The Bitcoin Core developers
   2  // Distributed under the MIT software license, see the accompanying
   3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4  
   5  #include <qt/freespacechecker.h>
   6  
   7  #include <qt/guiutil.h>
   8  #include <util/fs.h>
   9  
  10  #include <QDir>
  11  #include <QString>
  12  
  13  #include <cstdint>
  14  
  15  void FreespaceChecker::check()
  16  {
  17      QString dataDirStr = intro->getPathToCheck();
  18      fs::path dataDir = GUIUtil::QStringToPath(dataDirStr);
  19      uint64_t freeBytesAvailable = 0;
  20      int replyStatus = ST_OK;
  21      QString replyMessage = tr("A new data directory will be created.");
  22  
  23      /* Find first parent that exists, so that fs::space does not fail */
  24      fs::path parentDir = dataDir;
  25      fs::path parentDirOld = fs::path();
  26      while(parentDir.has_parent_path() && !fs::exists(parentDir))
  27      {
  28          parentDir = parentDir.parent_path();
  29  
  30          /* Check if we make any progress, break if not to prevent an infinite loop here */
  31          if (parentDirOld == parentDir)
  32              break;
  33  
  34          parentDirOld = parentDir;
  35      }
  36  
  37      try {
  38          freeBytesAvailable = fs::space(parentDir).available;
  39          if(fs::exists(dataDir))
  40          {
  41              if(fs::is_directory(dataDir))
  42              {
  43                  QString separator = "<code>" + QDir::toNativeSeparators("/") + tr("name") + "</code>";
  44                  replyStatus = ST_OK;
  45                  replyMessage = tr("Directory already exists. Add %1 if you intend to create a new directory here.").arg(separator);
  46              } else {
  47                  replyStatus = ST_ERROR;
  48                  replyMessage = tr("Path already exists, and is not a directory.");
  49              }
  50          }
  51      } catch (const fs::filesystem_error&)
  52      {
  53          /* Parent directory does not exist or is not accessible */
  54          replyStatus = ST_ERROR;
  55          replyMessage = tr("Cannot create data directory here.");
  56      }
  57      Q_EMIT reply(replyStatus, replyMessage, freeBytesAvailable);
  58  }
  59