Index: contrib/opensolaris/cmd/zfs/zfs_main.c
===================================================================
--- contrib/opensolaris/cmd/zfs/zfs_main.c	(revision 199647)
+++ contrib/opensolaris/cmd/zfs/zfs_main.c	(working copy)
@@ -20,7 +20,7 @@
  */
 
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -2457,7 +2457,7 @@
 
 	bzero(&flags, sizeof (recvflags_t));
 	/* check options */
-	while ((c = getopt(argc, argv, ":dnvF")) != -1) {
+	while ((c = getopt(argc, argv, ":dnuvF")) != -1) {
 		switch (c) {
 		case 'd':
 			flags.isprefix = B_TRUE;
@@ -2465,6 +2465,9 @@
 		case 'n':
 			flags.dryrun = B_TRUE;
 			break;
+		case 'u':
+			flags.nomount = B_TRUE;
+			break;
 		case 'v':
 			flags.verbose = B_TRUE;
 			break;
Index: contrib/opensolaris/lib/libzfs/common/libzfs.h
===================================================================
--- contrib/opensolaris/lib/libzfs/common/libzfs.h	(revision 199647)
+++ contrib/opensolaris/lib/libzfs/common/libzfs.h	(working copy)
@@ -20,7 +20,7 @@
  */
 
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -457,6 +457,9 @@
 
 	/* byteswap flag is used internally; callers need not specify */
 	int byteswap : 1;
+
+	/* do not mount file systems as they are extracted (private) */
+	int nomount : 1;
 } recvflags_t;
 
 extern int zfs_receive(libzfs_handle_t *, const char *, recvflags_t,
Index: contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c
===================================================================
--- contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c	(revision 199647)
+++ contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c	(working copy)
@@ -20,7 +20,7 @@
  */
 
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -2080,7 +2080,7 @@
 
 	err = zfs_receive_impl(hdl, tosnap, flags, infd, stream_avl, &top_zfs);
 
-	if (err == 0 && top_zfs) {
+	if (err == 0 && !flags.nomount && top_zfs) {
 		zfs_handle_t *zhp;
 		prop_changelist_t *clp;