Fuse the proclist into the root node

* dircat.c, dircat.h: New files, merge directories.
* Makefile: Add the dircat module.
* main.c: Use dircat to merge the proclist into the root
  directory, instead of having it as a stand-alone one.
* procfs.h, procfs.c: Add a "refresh hack" to have the
  contents of the root directory recreated on each request.
* proclist.c (proclist_make_node): Enable the hack in question.

1 files changed, 8 insertions, 0 deletions

diff --git a/procfs.h b/procfs.h
index 3cb3223..b44db6e 100644
--- a/procfs.h
+++ b/procfs.h
@@ -27,6 +27,14 @@ struct procfs_node_ops
 
   /* Destroy this node.  */
   void (*cleanup) (void *hook);
+
+  /* FIXME: This is needed because the root node is persistent, and we
+     want the list of processes to be updated. However, this means that
+     readdir() on the root node runs the risk of returning incoherent
+     results if done in multiple runs and processes are added/removed in
+     the meantime.  The right way to fix this is probably to add a
+     getroot() user hook function to libnetfs.  */
+  int enable_refresh_hack_and_break_readdir;
 };
 
 /* These helper functions can be used as procfs_node_ops.cleanup_contents. */