Index: head/sys/compat/cloudabi/cloudabi_sock.c
===================================================================
--- head/sys/compat/cloudabi/cloudabi_sock.c	(revision 285597)
+++ head/sys/compat/cloudabi/cloudabi_sock.c	(revision 285598)
@@ -1,83 +1,106 @@
 /*-
  * Copyright (c) 2015 Nuxi, https://nuxi.nl/
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <sys/socket.h>
+#include <sys/sysproto.h>
+
 #include <compat/cloudabi/cloudabi_proto.h>
+#include <compat/cloudabi/cloudabi_syscalldefs.h>
 
 int
 cloudabi_sys_sock_accept(struct thread *td,
     struct cloudabi_sys_sock_accept_args *uap)
 {
 
 	/* Not implemented. */
 	return (ENOSYS);
 }
 
 int
 cloudabi_sys_sock_bind(struct thread *td,
     struct cloudabi_sys_sock_bind_args *uap)
 {
 
 	/* Not implemented. */
 	return (ENOSYS);
 }
 
 int
 cloudabi_sys_sock_connect(struct thread *td,
     struct cloudabi_sys_sock_connect_args *uap)
 {
 
 	/* Not implemented. */
 	return (ENOSYS);
 }
 
 int
 cloudabi_sys_sock_listen(struct thread *td,
     struct cloudabi_sys_sock_listen_args *uap)
 {
+	struct listen_args listen_args = {
+		.s = uap->s,
+		.backlog = uap->backlog,
+	};
 
-	/* Not implemented. */
-	return (ENOSYS);
+	return (sys_listen(td, &listen_args));
 }
 
 int
 cloudabi_sys_sock_shutdown(struct thread *td,
     struct cloudabi_sys_sock_shutdown_args *uap)
 {
+	struct shutdown_args shutdown_args = {
+		.s = uap->fd,
+	};
 
-	/* Not implemented. */
-	return (ENOSYS);
+	switch (uap->how) {
+	case CLOUDABI_SHUT_RD:
+		shutdown_args.how = SHUT_RD;
+		break;
+	case CLOUDABI_SHUT_WR:
+		shutdown_args.how = SHUT_WR;
+		break;
+	case CLOUDABI_SHUT_RD | CLOUDABI_SHUT_WR:
+		shutdown_args.how = SHUT_RDWR;
+		break;
+	default:
+		return (EINVAL);
+	}
+
+	return (sys_shutdown(td, &shutdown_args));
 }
 
 int
 cloudabi_sys_sock_stat_get(struct thread *td,
     struct cloudabi_sys_sock_stat_get_args *uap)
 {
 
 	/* Not implemented. */
 	return (ENOSYS);
 }