+int futimens(int, const struct timespec [2]);
+int utimensat(int, const char *, const struct timespec [2], int);
+
+#ifdef _BSD_SOURCE
+int lchmod(const char *, mode_t);
+#endif
+
+#ifdef _GNU_SOURCE
+#define S_IREAD S_IRUSR
+#define S_IWRITE S_IWUSR
+#define S_IEXEC S_IXUSR
+#endif