+/* Convert the IP address SA to a Unix-domain address SUN. Fail if the
+ * address seems already taken. If DESPARATEP then try cleaning up stale old
+ * sockets.
+ */
+static int encode_unused_inet_addr(struct sockaddr *sa,
+ struct sockaddr_un *sun,
+ int desperatep)
+{
+ address waddr;
+ struct sockaddr_un wsun;
+ int rc;
+ char buf[ADDRBUFSZ];
+
+ snprintf(sun->sun_path, sizeof(sun->sun_path), "%s/%s", sockdir,
+ present_sockaddr(sa, 0, buf, sizeof(buf)));
+ if ((rc = unix_socket_status(sun, !desperatep)) == USED) return (-1);
+ else if (rc == STALE) unlink(sun->sun_path);
+
+ wildcard_address(sa->sa_family, &waddr.sa);
+ port_to_sockaddr(&waddr.sa, port_from_sockaddr(sa));
+ snprintf(wsun.sun_path, sizeof(wsun.sun_path), "%s/%s", sockdir,
+ present_sockaddr(&waddr.sa, 0, buf, sizeof(buf)));
+ if ((rc = unix_socket_status(&wsun, !desperatep)) == USED) return (-1);
+ else if (rc == STALE) unlink(wsun.sun_path);
+
+ return (0);
+}
+