More cleanup possibilities

* procfs.c, procfs.h: Extend the signature of the
  cleanup_contents callback in the procfs_node_ops structure to include
  the hook and contents_len.  (cleanup_contents_with_free,
  cleanup_contents_with_vm_deallocate): New functions, can be used as
  a cleanup_contents callback for simple cases.
* procfs_dir.c, procfs_dir.h (procfs_dir_make_node):
  Update, add a cleanup callback, make sure the cleanup callback is
  invoked if there is an error.
* proclist.c (proclist_make_node), main.c (main): Update to match
  the new interfaces.

1 files changed, 7 insertions, 2 deletions

diff --git a/procfs_dir.h b/procfs_dir.h
index 1ba45ad..4eb934e 100644
--- a/procfs_dir.h
+++ b/procfs_dir.h
@@ -9,7 +9,12 @@ struct procfs_dir_entry
 };
 
 /* A simple directory is built from a table of entries.  The table is
-   terminated by a null NAME pointer.  */
+   terminated by a null NAME pointer.  The DIR_HOOK is passed the
+   MAKE_NODE callback function of looked up procfs_dir_entries, and to
+   the provided CLEANUP function when the directory is destroyed.
+   Returns the new directory node.  If not enough memory can be
+   allocated, CLEANUP is invoked immediately and NULL is returned.  */
 struct node *
-procfs_dir_make_node (const struct procfs_dir_entry *entries, void *dir_hook);
+procfs_dir_make_node (const struct procfs_dir_entry *entries,
+		      void *dir_hook, void (*cleanup) (void *dir_hook));