| enum   | errc {  
  address_family_not_supported, 
address_in_use, 
address_not_available, 
already_connected, 
 
  argument_list_too_long, 
argument_out_of_domain, 
bad_address, 
bad_file_descriptor, 
 
  broken_pipe, 
connection_aborted, 
connection_already_in_progress, 
connection_refused, 
 
  connection_reset, 
cross_device_link, 
destination_address_required, 
device_or_resource_busy, 
 
  directory_not_empty, 
executable_format_error, 
file_exists, 
file_too_large, 
 
  filename_too_long, 
function_not_supported, 
host_unreachable, 
illegal_byte_sequence, 
 
  inappropriate_io_control_operation, 
interrupted, 
invalid_argument, 
invalid_seek, 
 
  io_error, 
is_a_directory, 
message_size, 
network_down, 
 
  network_reset, 
network_unreachable, 
no_buffer_space, 
no_child_process, 
 
  no_lock_available, 
no_message, 
no_protocol_option, 
no_space_on_device, 
 
  no_such_device_or_address, 
no_such_device, 
no_such_file_or_directory, 
no_such_process, 
 
  not_a_directory, 
not_a_socket, 
not_connected, 
not_enough_memory, 
 
  operation_in_progress, 
operation_not_permitted, 
operation_not_supported, 
operation_would_block, 
 
  permission_denied, 
protocol_not_supported, 
read_only_file_system, 
resource_deadlock_would_occur, 
 
  resource_unavailable_try_again, 
result_out_of_range, 
timed_out, 
too_many_files_open_in_system, 
 
  too_many_files_open, 
too_many_links, 
too_many_symbolic_link_levels, 
wrong_protocol_type
 
 } |