diff --git a/src/vlib/unix/unix.h b/src/vlib/unix/unix.h
index ee1312e..97f5894 100644
--- a/src/vlib/unix/unix.h
+++ b/src/vlib/unix/unix.h
@@ -106,6 +106,9 @@
   /* runtime directory path */
   u8 *runtime_dir;
 
+  /* pidfile filename */
+  u8 *pidfile;
+
   /* unix config complete */
   volatile int unix_config_complete;
 
@@ -241,6 +244,10 @@
 
 clib_error_t *vlib_unix_recursive_mkdir (char *path);
 
+clib_error_t *vlib_unix_validate_runtime_file (unix_main_t * um,
+					       const char *path,
+					       u8 ** full_path);
+
 #endif /* included_unix_unix_h */
 
 /*