Method OpenFd

cvmfs/fd_table.h:76–88

* Registers fd with a currently unused number. If the table is full, * returns -ENFILE; */

   * returns -ENFILE;
   */
  int OpenFd(const HandleT &handle) {
    if (handle == invalid_handle_)
      return -EINVAL;
    if (fd_pivot_ >= fd_index_.size())
      return -ENFILE;

    size_t const next_fd = fd_index_[fd_pivot_];
    assert(next_fd < open_fds_.size());
    assert(open_fds_[next_fd].handle == invalid_handle_);
    open_fds_[next_fd] = FdWrapper(handle, fd_pivot_);
    ++fd_pivot_;
    return next_fd;
  }

  /**
   * For invalid and unused numbers, the invalid handle is returned.