diff --git a/libconfig-1.4.9/lib/scanctx.h b/libconfig-1.4.9/lib/scanctx.h
new file mode 100644
index 0000000000000000000000000000000000000000..8ff934e7e958f67c55cec4b22b4d0eb8dc37d1a3
--- /dev/null
+++ b/libconfig-1.4.9/lib/scanctx.h
@@ -0,0 +1,62 @@
+/* ----------------------------------------------------------------------------
+   libconfig - A library for processing structured configuration files
+   Copyright (C) 2005-2010  Mark A Lindner
+
+   This file is part of libconfig.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License
+   as published by the Free Software Foundation; either version 2.1 of
+   the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, see
+   <http://www.gnu.org/licenses/>.
+   ----------------------------------------------------------------------------
+*/
+
+#ifndef __libconfig_scanctx_h
+#define __libconfig_scanctx_h
+
+#include "libconfig.h"
+#include "strbuf.h"
+
+#include <stdio.h>
+#include <sys/types.h>
+
+#define MAX_INCLUDE_DEPTH 10
+
+struct scan_context
+{
+  config_t *config;
+  const char *top_filename;
+  const char *files[MAX_INCLUDE_DEPTH];
+  void *buffers[MAX_INCLUDE_DEPTH];
+  FILE *streams[MAX_INCLUDE_DEPTH];
+  int depth;
+  strbuf_t string;
+  const char **filenames;
+  unsigned int num_filenames;
+};
+
+extern void scanctx_init(struct scan_context *ctx, const char *top_filename);
+extern const char **scanctx_cleanup(struct scan_context *ctx,
+                                    unsigned int *num_filenames);
+
+extern FILE *scanctx_push_include(struct scan_context *ctx, void *prev_buffer,
+                                  const char **error);
+extern void *scanctx_pop_include(struct scan_context *ctx);
+
+#define scanctx_append_string(C, S)             \
+  strbuf_append(&((C)->string), (S))
+
+extern char *scanctx_take_string(struct scan_context *ctx);
+
+extern const char *scanctx_current_filename(struct scan_context *ctx);
+
+#endif /* __libconfig_scanctx_h */