Function ListDatabases

src/wallet/db.cpp:18–61

namespace wallet {
std::vector<fs::path> ListDatabases(const fs::path& wallet_dir)
{
    std::vector<fs::path> paths;
    std::error_code ec;

    for (auto it = fs::recursive_directory_iterator(wallet_dir, ec); it != fs::recursive_directory_iterator(); it.increment(ec)) {
        if (ec) {
            if (fs::is_directory(*it)) {
                it.disable_recursion_pending();
                LogPrintf("%s: %s %s -- skipping.\n", __func__, ec.message(), fs::PathToString(it->path()));
            } else {
                LogPrintf("%s: %s %s\n", __func__, ec.message(), fs::PathToString(it->path()));
            }
            continue;
        }

        try {
            const fs::path path{it->path().lexically_relative(wallet_dir)};

            if (it->status().type() == fs::file_type::directory &&
                (IsBDBFile(BDBDataFile(it->path())) || IsSQLiteFile(SQLiteDataFile(it->path())))) {
                // Found a directory which contains wallet.dat btree file, add it as a wallet.
                paths.emplace_back(path);
            } else if (it.depth() == 0 && it->symlink_status().type() == fs::file_type::regular && IsBDBFile(it->path())) {
                if (it->path().filename() == "wallet.dat") {
                    // Found top-level wallet.dat btree file, add top level directory ""
                    // as a wallet.
                    paths.emplace_back();
                } else {
                    // Found top-level btree file not called wallet.dat. Current bitcoin
                    // software will never create these files but will allow them to be
                    // opened in a shared database environment for backwards compatibility.
                    // Add it to the list of available wallets.
                    paths.emplace_back(path);
                }
            }
        } catch (const std::exception& e) {
            LogPrintf("%s: Error scanning %s: %s\n", __func__, fs::PathToString(it->path()), e.what());
            it.disable_recursion_pending();
        }
    }

    return paths;
}

fs::path BDBDataFile(const fs::path& wallet_path)
{