2010-08-15 Robert Millan <rmh@gnu.org>

* kern/emu/misc.c (grub_get_libzfs_handle): Handle libzfs_init()
	errors.
	* kern/emu/getroot.c (find_root_device_from_libzfs): Handle
	grub_get_libzfs_handle() errors.

ChangeLog

@@ -1,3 +1,10 @@
+2010-08-15  Robert Millan  <rmh@gnu.org>
+
+	* kern/emu/misc.c (grub_get_libzfs_handle): Handle libzfs_init()
+	errors.
+	* kern/emu/getroot.c (find_root_device_from_libzfs): Handle
+	grub_get_libzfs_handle() errors.
+
 2010-08-14  Robert Millan  <rmh@gnu.org>
 
 	* kern/emu/misc.c (grub_find_zpool_from_dir): Abort function if

kern/emu/getroot.c

@@ -188,11 +188,16 @@ find_root_device_from_libzfs (const char *dir)
 
   {
     zpool_handle_t *zpool;
+    libzfs_handle_t *libzfs;
     nvlist_t *nvlist;
     nvlist_t **nvlist_array;
     unsigned int nvlist_count;
 
-    zpool = zpool_open (grub_get_libzfs_handle (), poolname);
+    libzfs = grub_get_libzfs_handle ();
+    if (! libzfs)
+      return NULL;
+
+    zpool = zpool_open (libzfs, poolname);
     nvlist = zpool_get_config (zpool, NULL);
 
     if (nvlist_lookup_nvlist (nvlist, "vdev_tree", &nvlist) != 0)

kern/emu/misc.c

@@ -268,7 +268,9 @@ grub_get_libzfs_handle (void)
   if (! __libzfs_handle)
     {
       __libzfs_handle = libzfs_init ();
-      atexit (fini_libzfs);
+
+      if (__libzfs_handle)
+	atexit (fini_libzfs);
     }
 
   return __libzfs_handle;