--- a/common/portpath.c	Tue Mar 25 12:54:47 2014 +0100
+++ b/common/portpath.c	Tue Mar 25 13:08:59 2014 +0100
@@ -4,6 +4,9 @@
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
 
 
 char *
@@ -31,3 +34,21 @@
   return _fullpath(NULL, path, 0);
 #endif
 }
+
+bool
+port_fileexits(char *path)
+{
+  int ret;
+#ifndef _WIN32
+  struct stat sb;
+  ret = stat(path, &sb);
+#else
+  struct _stat sb;
+  ret = _stat(path, &sb);
+#endif
+
+  if (ret == 0)
+    return true;
+  else
+    return false;
+}