Module unix_socket 

Unix Domain Sockets (AF_UNIX)

Provides local inter-process communication via the BSD socket API with path-based addressing. Used by Wayland compositors for client-server communication and by system daemons for local service connections.

Supported features:

• Stream (SOCK_STREAM) and datagram (SOCK_DGRAM) modes
• Path-based binding (/run/wayland-0, /tmp/.X11-unix/X0)
• socketpair() for anonymous connected socket pairs
• SCM_RIGHTS for file descriptor passing (Wayland buffer handles)
• Backlog queue for pending connections

Structs

ScmRights

Ancillary data for SCM_RIGHTS file descriptor passing.

UnixMessage

A message in the Unix socket buffer.

UnixSocket

A Unix domain socket.

Enums

UnixSocketState

Unix socket state.

UnixSocketType

Unix socket type.

Constants

SCM_RIGHTS_MAX

Maximum number of file descriptors in a single SCM_RIGHTS message.

UNIX_BACKLOG_MAX

Maximum backlog for pending connections.

UNIX_DGRAM_MAX

Maximum message size for datagram mode.

UNIX_PATH_MAX

Maximum path length for a Unix socket address.

UNIX_SOCKET_MAX

Maximum number of concurrent Unix sockets.

Functions

socket_accept

Accept a pending connection on a listening socket.

socket_bind

Bind a Unix socket to a filesystem path.

socket_close

Close a Unix socket.

socket_connect

Connect a stream socket to a listening socket at the given path.

socket_count

Get the number of active Unix sockets.

socket_create

Create a new Unix domain socket.

socket_listen

Start listening for incoming connections (stream sockets only).

socket_recv

Receive data from a connected or datagram socket.

socket_send

Send data on a connected socket.

socket_sendto

Send a datagram to a named socket (connectionless).

socketpair

Create an anonymous connected socket pair (socketpair).