| enum   | errc_t {  
  success = 0, 
 
  address_family_not_supported = EAFNOSUPPORT, 
 
  address_in_use = EADDRINUSE, 
 
  address_not_available = EADDRNOTAVAIL, 
 
  already_connected = EISCONN, 
 
  argument_list_too_long = E2BIG, 
 
  argument_out_of_domain = EDOM, 
 
  bad_address = EFAULT, 
 
  bad_file_descriptor = EBADF, 
 
  bad_message = EBADMSG, 
 
  broken_pipe = EPIPE, 
 
  connection_aborted = ECONNABORTED, 
 
  connection_already_in_progress = EALREADY, 
 
  connection_refused = ECONNREFUSED, 
 
  connection_reset = ECONNRESET, 
 
  cross_device_link = EXDEV, 
 
  destination_address_required = EDESTADDRREQ, 
 
  device_or_resource_busy = EBUSY, 
 
  directory_not_empty = ENOTEMPTY, 
 
  executable_format_error = ENOEXEC, 
 
  file_exists = EEXIST, 
 
  file_too_large = EFBIG, 
 
  filename_too_long = ENAMETOOLONG, 
 
  function_not_supported = ENOSYS, 
 
  host_unreachable = EHOSTUNREACH, 
 
  identifier_removed = EIDRM, 
 
  illegal_byte_sequence = EILSEQ, 
 
  inappropriate_io_control_operation = ENOTTY, 
 
  interrupted = EINTR, 
 
  invalid_argument = EINVAL, 
 
  invalid_seek = ESPIPE, 
 
  io_error = EIO, 
 
  is_a_directory = EISDIR, 
 
  message_size = EMSGSIZE, 
 
  network_down = ENETDOWN, 
 
  network_reset = ENETRESET, 
 
  network_unreachable = ENETUNREACH, 
 
  no_buffer_space = ENOBUFS, 
 
  no_child_process = ECHILD, 
 
  no_link = ENOLINK, 
 
  no_lock_available = ENOLCK, 
 
  no_message_available = ENODATA, 
 
  no_message = ENOMSG, 
 
  no_protocol_option = ENOPROTOOPT, 
 
  no_space_on_device = ENOSPC, 
 
  no_stream_resources = ENOSR, 
 
  no_such_device_or_address = ENXIO, 
 
  no_such_device = ENODEV, 
 
  no_such_file_or_directory = ENOENT, 
 
  no_such_process = ESRCH, 
 
  not_a_directory = ENOTDIR, 
 
  not_a_socket = ENOTSOCK, 
 
  not_a_stream = ENOSTR, 
 
  not_connected = ENOTCONN, 
 
  not_enough_memory = ENOMEM, 
 
  not_supported = ENOTSUP, 
 
  operation_canceled = ECANCELED, 
 
  operation_in_progress = EINPROGRESS, 
 
  operation_not_permitted = EPERM, 
 
  operation_not_supported = EOPNOTSUPP, 
 
  operation_would_block = EWOULDBLOCK, 
 
  owner_dead = EOWNERDEAD, 
 
  permission_denied = EACCES, 
 
  protocol_error = EPROTO, 
 
  protocol_not_supported = EPROTONOSUPPORT, 
 
  read_only_file_system = EROFS, 
 
  resource_deadlock_would_occur = EDEADLK, 
 
  resource_unavailable_try_again = EAGAIN, 
 
  result_out_of_range = ERANGE, 
 
  state_not_recoverable = ENOTRECOVERABLE, 
 
  stream_timeout = ETIME, 
 
  text_file_busy = ETXTBSY, 
 
  timed_out = ETIMEDOUT, 
 
  too_many_files_open_in_system = ENFILE, 
 
  too_many_files_open = EMFILE, 
 
  too_many_links = EMLINK, 
 
  too_many_symbolic_link_levels = ELOOP, 
 
  value_too_large = EOVERFLOW, 
 
  wrong_protocol_type = EPROTOTYPE
 
 } |