* Allow unprivileged users to run the garbage collector and to do

`nix-store --delete'.  But unprivileged users are not allowed to
  ignore liveness.
* `nix-store --delete --ignore-liveness': ignore the runtime roots as
  well.

src/libstore/gc.hh

@@ -1,42 +0,0 @@
-#ifndef __GC_H
-#define __GC_H
-
-#include "types.hh"
-
-
-namespace nix {
-
-
-/* Garbage collector operation. */
-typedef enum {
-    gcReturnRoots,
-    gcReturnLive,
-    gcReturnDead,
-    gcDeleteDead,
-    gcDeleteSpecific,
-} GCAction;
-
-/* If `action' is set to `gcReturnRoots', find and return the set of
-   roots for the garbage collector.  These are the store paths
-   symlinked to in the `gcroots' directory.  If `action' is
-   `gcReturnLive', return the set of paths reachable from (i.e. in the
-   closure of) the roots.  If `action' is `gcReturnDead', return the
-   set of paths not reachable from the roots.  If `action' is
-   `gcDeleteDead', actually delete the latter set. */
-void collectGarbage(GCAction action, const PathSet & pathsToDelete,
-    bool ignoreLiveness, PathSet & result, unsigned long long & bytesFreed);
-
-/* Remove the temporary roots file for this process.  Any temporary
-   root becomes garbage after this point unless it has been registered
-   as a (permanent) root. */
-void removeTempRoots();
-
-/* Register a permanent GC root. */
-Path addPermRoot(const Path & storePath, const Path & gcRoot,
-    bool indirect, bool allowOutsideRootsDir = false);
-
-
-}
-
-
-#endif /* !__GC_H */