--- /dev/null
+/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_TIMEX_H
+#define _SYS_TIMEX_H 1
+
+#include <features.h>
+#include <sys/time.h>
+
+/* These definitions from linux/timex.h as of 2.6.30. */
+
+#include <bits/timex.h>
+
+#define NTP_API 4 /* NTP API version */
+
+struct ntptimeval
+{
+ struct timeval time; /* current time (ro) */
+ long int maxerror; /* maximum error (us) (ro) */
+ long int esterror; /* estimated error (us) (ro) */
+ long int tai; /* TAI offset (ro) */
+
+ long int __glibc_reserved1;
+ long int __glibc_reserved2;
+ long int __glibc_reserved3;
+ long int __glibc_reserved4;
+};
+
+/* Clock states (time_state) */
+#define TIME_OK 0 /* clock synchronized, no leap second */
+#define TIME_INS 1 /* insert leap second */
+#define TIME_DEL 2 /* delete leap second */
+#define TIME_OOP 3 /* leap second in progress */
+#define TIME_WAIT 4 /* leap second has occurred */
+#define TIME_ERROR 5 /* clock not synchronized */
+#define TIME_BAD TIME_ERROR /* bw compat */
+
+/* Maximum time constant of the PLL. */
+#define MAXTC 6
+
+__BEGIN_DECLS
+
+extern int __adjtimex (struct timex *__ntx) __THROW;
+extern int adjtimex (struct timex *__ntx) __THROW;
+
+#ifdef __REDIRECT_NTH
+extern int __REDIRECT_NTH (ntp_gettime, (struct ntptimeval *__ntv),
+ ntp_gettimex);
+#else
+extern int ntp_gettimex (struct ntptimeval *__ntv) __THROW;
+# define ntp_gettime ntp_gettimex
+#endif
+extern int ntp_adjtime (struct timex *__tntx) __THROW;
+
+__END_DECLS
+
+#endif /* sys/timex.h */