1 /* settime -- set the system clock
3 Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19 /* Written by Paul Eggert. */
29 /* Some systems don't have ENOSYS. */
32 # define ENOSYS ENOTSUP
34 /* Some systems don't have ENOTSUP either. */
35 # define ENOSYS EINVAL
39 /* Set the system time. */
42 settime (struct timespec const *ts)
44 #if defined CLOCK_REALTIME && HAVE_CLOCK_SETTIME
46 int r = clock_settime (CLOCK_REALTIME, ts);
47 if (r == 0 || errno == EPERM)
56 tv.tv_sec = ts->tv_sec;
57 tv.tv_usec = ts->tv_nsec / 1000;
58 return settimeofday (&tv, 0);
61 /* This fails to compile on OSF1 V5.1, due to stime requiring
62 a `long int*' and tv_sec is `int'. But that system does provide
64 return stime (&ts->tv_sec);