Add the mountee to the list of merged filesystems.unionmount

* mount.c (start_mountee): Add the mountee's filesystem to the
list of merged filesystems.
* node.c (node_init_root): Take into consideration the fact that
an empty string refers to the mountee root.
* ulfs.c (ulfs_check): Likewise.
(ulfs_register): Don't check whether "" is a valid directory.

1 files changed, 3 insertions, 1 deletions

diff --git a/mount.h b/mount.h
index fd265f0..fb5758d 100644
--- a/mount.h
+++ b/mount.h
@@ -42,7 +42,9 @@ extern int mountee_started;
 error_t
 start_mountee (node_t * np, char * argz, size_t argz_len, mach_port_t * port);
 
-/* Sets up a proxy node and sets the translator on it.  */
+/* Sets up a proxy node, sets the translator on it, and registers the
+   filesystem published by the translator in the list of merged
+   filesystems.  */
 error_t
 setup_unionmount (void);