# Method Stdio.Port()->listen_fd()

Method listen_fd

  ``int` listen_fd(`int` `fd`, `void`|`function`(:`void`) `accept_callback`)`

Description

  This function does the same as bind, except that instead of creating a new socket and bind it to a port, it expects the file descriptor `fd` to be an already open port.

Note

  This function is only for the advanced user, and is generally used when sockets are passed to Pike at exec time.

See also

  bind, accept