Switch mtab_list to doubly linked so we can traverse in either order. Convert umount and df. Add dlist_terminate() to break lists for traversal in either direction.

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/llist.c b/lib/llist.c
index 2d5bc97a..6b4b8f2c 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -85,3 +85,17 @@ struct double_list *dlist_add(struct double_list **list, char *data)
 
   return new;
 }
+
+// Terminate circular list for traversal in either direction. Returns end *.
+void *dlist_terminate(void *list)
+{
+  struct double_list *end = list;
+
+  if (!list) return 0;
+
+  end = end->prev;
+  end->next->prev = 0;
+  end->next = 0;
+
+  return end;
+}