diff --git a/tst/test.c b/tst/test.c
new file mode 100644
index 0000000..9f2554d
--- /dev/null
+++ b/tst/test.c
@@ -0,0 +1,33 @@
+// this file was used on freebsd to create struct stat mapping
+// in the src/unix/vpkFreeBSDFiles.Mod binding.
+#include "sys/stat.h"
+#include "stdio.h"
+
+int main()
+{
+struct stat s;
+printf ("size of stat is %i\n", sizeof(s));
+
+printf ("size of s.st_dev is %i\n", sizeof(s.st_dev));
+printf ("size of s.st_ino is %i\n", sizeof(s.st_ino));
+printf ("size of s.st_nlink is %i\n", sizeof(s.st_nlink));
+printf ("size of s.st_mode is %i\n", sizeof(s.st_mode));
+printf ("size of s.st_padding0 is %i\n", sizeof(s.st_padding0));
+printf ("size of s.st_uid is %i\n", sizeof(s.st_uid));
+printf ("size of s.st_gid is %i\n", sizeof(s.st_gid));
+printf ("size of s.st_padding1 is %i\n", sizeof(s.st_padding1));
+printf ("size of s.rdev is %i\n", sizeof(s.st_rdev));
+printf ("size of s.st_atim is %i\n", sizeof(s.st_atim));
+printf ("size of s.st_mtim is %i\n", sizeof(s.st_mtim));
+printf ("size of s.st_ctim is %i\n", sizeof(s.st_ctim));
+printf ("size of s.st_birthtim is %i\n", sizeof(s.st_birthtim));
+printf ("size of s.st_size is %i\n", sizeof(s.st_size));
+printf ("size of s.st_blocks is %i\n", sizeof(s.st_blocks));
+printf ("size of s.st_blksize is %i\n", sizeof(s.st_blksize));
+printf ("size of s.st_flags is %i\n", sizeof(s.st_flags));
+printf ("size of s.st_gen is %i\n", sizeof(s.st_gen));
+printf ("size of s.st_spare is %i\n", sizeof(s.st_spare));
+
+return 0;
+
+}