Re: [Sbcl-help] Does SBCL support abstract Unix sockets?

[Orivej D. <or...@gm...>]

> Abstract Unix socket is a socket namespace supported by Linux and
> described in unix(7).
> 
> Does SBCL have support for it?

Yes, it has.  Sockets are documented in the manual http://sbcl.org/manual/index.html, and section 14.5 describes LOCAL-SOCKET class.

For example,

(use-package :sb-bsd-sockets)
(defparameter *socket-path* "/tmp/socket")
(when (probe-file *socket-path*) (delete-file *socket-path*))
(defparameter s1 (make-instance 'local-socket :type :stream))
(socket-bind s1 *socket-path*)
(socket-listen s1 0)
(defparameter s2 (make-instance 'local-socket :type :stream))
(socket-connect s2 *socket-path*)
(socket-send s2 "hello" nil)
(defparameter s3 (socket-accept s1))
(socket-receive s3 nil 10)

Alternatively, IOLIB also supports local sockets under SBCL:

(use-package :iolib.sockets)
(defparameter *socket-path* "/tmp/socket")
(when (probe-file *socket-path*) (delete-file *socket-path*))
(defparameter s1
  (make-socket :address-family :local
               :connect :passive
               :local-filename *socket-path*))
(listen-on s1)
(defparameter s2
  (make-socket :address-family :local
               :remote-filename *socket-path*))
(send-to s2 (sb-ext:string-to-octets "hello"))
(defparameter s3 (accept-connection s1))
(receive-from s1 :size 10)