-int openat (int fd, char const *filename, int flags, /* mode_t mode */ ...);
+int openat (int fd, char const *file, int flags, /* mode_t mode */ ...);
+# if ! HAVE_FDOPENDIR
+# define fdopendir __OPENAT_ID (fdopendir)
+# endif
+DIR *fdopendir (int fd);
+# define fstatat __OPENAT_ID (fstatat)
+int fstatat (int fd, char const *file, struct stat *st, int flag);
+# define unlinkat __OPENAT_ID (unlinkat)
+int unlinkat (int fd, char const *file, int flag);
+void openat_restore_fail (int) ATTRIBUTE_NORETURN;
+void openat_save_fail (int) ATTRIBUTE_NORETURN;
+# else
+# define openat_restore_fail(Errno) /* empty */
+# define openat_save_fail(Errno) /* empty */