Method GetTestDirectory

src/leveldb/util/env_posix.cc:685–700

  }

  Status GetTestDirectory(std::string* result) override {
    const char* env = std::getenv("TEST_TMPDIR");
    if (env && env[0] != '\0') {
      *result = env;
    } else {
      char buf[100];
      std::snprintf(buf, sizeof(buf), "/tmp/leveldbtest-%d",
                    static_cast<int>(::geteuid()));
      *result = buf;
    }

    // The CreateDir status is ignored because the directory may already exist.
    CreateDir(*result);

    return Status::OK();
  }

  Status NewLogger(const std::string& filename, Logger** result) override {
    int fd = ::open(filename.c_str(),