Expose current session socket as $ABDUCO_SOCKET

This is an absolute path to the Unix domain socket representing the
current session.

abduco.1

@@ -144,6 +144,8 @@ is examined, if it is not set
 is executed.
 .It Ev ABDUCO_SESSION
 The current session name available to the supervised command.
+.It Ev ABDUCO_SOCKET
+The absolute path of the session socket available to the supervised command.
 .El
 .Pp
 See the

abduco.c

@@ -385,6 +385,7 @@ static bool set_socket_name(struct sockaddr_un *sockaddr, const char *name) {
 		session_name = basename(buf);
 	}
 	setenv("ABDUCO_SESSION", session_name, 1);
+	setenv("ABDUCO_SOCKET", sockaddr->sun_path, 1);
 
 	return true;
 }