Add new 'proc' filesystem framework and put luks_script into it.

include/grub/procfs.h

@@ -0,0 +1,50 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2013  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_PROCFS_HEADER
+#define GRUB_PROCFS_HEADER	1
+
+#include <grub/list.h>
+
+struct grub_procfs_entry
+{
+  struct grub_procfs_entry *next;
+  struct grub_procfs_entry **prev;
+
+  const char *name;
+  char * (*get_contents) (void);
+};
+
+extern struct grub_procfs_entry *grub_procfs_entries;
+
+static inline void
+grub_procfs_register (const char *name __attribute__ ((unused)),
+		      struct grub_procfs_entry *entry)
+{
+  grub_list_push (GRUB_AS_LIST_P (&grub_procfs_entries),
+		  GRUB_AS_LIST (entry));
+}
+
+static inline void
+grub_procfs_unregister (struct grub_procfs_entry *entry)
+{
+  grub_list_remove (GRUB_AS_LIST (entry));
+}
+
+
+#endif