1 /* settime -- set the system clock
3 Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20 /* Written by Paul Eggert. */
31 /* Some systems don't have ENOSYS. */
34 # define ENOSYS ENOTSUP
36 /* Some systems don't have ENOTSUP either. */
37 # define ENOSYS EINVAL
41 /* Set the system time. */
44 settime (struct timespec const *ts)
46 #if defined CLOCK_REALTIME && HAVE_CLOCK_SETTIME
48 int r = clock_settime (CLOCK_REALTIME, ts);
49 if (r == 0 || errno == EPERM)
58 tv.tv_sec = ts->tv_sec;
59 tv.tv_usec = ts->tv_nsec / 1000;
60 return settimeofday (&tv, 0);
63 /* This fails to compile on OSF1 V5.1, due to stime requiring
64 a `long int*' and tv_sec is `int'. But that system does provide
66 return stime (&ts->tv_sec);