Simplify hard link handling

 - For now, enforce that hard links don't point to a directories.
 - Instead of doing the swaping trickery, just reorder the flat list
   and hand out new inode numbers.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/fstree/hardlink.c b/lib/fstree/hardlink.c
index 8a79d46..e71670a 100644
--- a/lib/fstree/hardlink.c
+++ b/lib/fstree/hardlink.c
@@ -57,6 +57,11 @@ int fstree_resolve_hard_link(fstree_t *fs, tree_node_t *node)
 		}
 	}
 
+	if (S_ISDIR(node->mode)) {
+		errno = EPERM;
+		return -1;
+	}
+
 	start->mode = FSTREE_MODE_HARD_LINK_RESOLVED;
 	start->data.target_node = node;