usr/src/lib/libast/common/tm/tvsettime.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23
  24 #include <tv.h>
  25 #include <tm.h>
  26 #include <errno.h>
  27
  28 #include "FEATURE/tvlib"
  29
  30 int
  31 tvsettime(const Tv_t* tv)
  32 {
  33
  34 #if _lib_clock_settime && defined(CLOCK_REALTIME)
  35
  36         struct timespec                 s;
  37
  38         s.tv_sec = tv->tv_sec;
  39         s.tv_nsec = tv->tv_nsec;
  40         return clock_settime(CLOCK_REALTIME, &s);
  41
  42 #else
  43
  44 #if defined(tmsettimeofday)
  45
  46         struct timeval                  v;
  47
  48         v.tv_sec = tv->tv_sec;
  49         v.tv_usec = tv->tv_nsec / 1000;
  50         return tmsettimeofday(&v);
  51
  52 #else
  53
  54 #if _lib_stime
  55
  56         static time_t                   s;
  57
  58         s = tv->tv_sec + (tv->tv_nsec != 0);
  59         return stime(s);
  60
  61 #else
  62
  63         errno = EPERM;
  64         return -1;
  65
  66 #endif
  67
  68 #endif
  69
  70 #endif
  71
  72 }