usr/src/lib/libast/common/tm/tmxtouch.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  * Glenn Fowler
  25  * AT&T Research
  26  *
  27  * Time_t conversion support
  28  */
  29
  30 #include <tmx.h>
  31 #include <tv.h>
  32
  33 /*
  34  * touch path <atime,mtime,ctime>
  35  * (flags&PATH_TOUCH_VERBATIM) treats times verbatim, otherwise:
  36  * Time_t==0            current time
  37  * Time_t==TMX_NOTIME   retains path value
  38  */
  39
  40 int
  41 tmxtouch(const char* path, Time_t at, Time_t mt, Time_t ct, int flags)
  42 {
  43         Tv_t    av;
  44         Tv_t    mv;
  45         Tv_t    cv;
  46         Tv_t*   ap;
  47         Tv_t*   mp;
  48         Tv_t*   cp;
  49
  50         if (at == TMX_NOTIME && !(flags & PATH_TOUCH_VERBATIM))
  51                 ap = TV_TOUCH_RETAIN;
  52         else if (!at && !(flags & PATH_TOUCH_VERBATIM))
  53                 ap = 0;
  54         else
  55         {
  56                 av.tv_sec = tmxsec(at);
  57                 av.tv_nsec = tmxnsec(at);
  58                 ap = &av;
  59         }
  60         if (mt == TMX_NOTIME && !(flags & PATH_TOUCH_VERBATIM))
  61                 mp = TV_TOUCH_RETAIN;
  62         else if (!mt && !(flags & PATH_TOUCH_VERBATIM))
  63                 mp = 0;
  64         else
  65         {
  66                 mv.tv_sec = tmxsec(mt);
  67                 mv.tv_nsec = tmxnsec(mt);
  68                 mp = &mv;
  69         }
  70         if (ct == TMX_NOTIME && !(flags & PATH_TOUCH_VERBATIM))
  71                 cp = TV_TOUCH_RETAIN;
  72         else if (!ct && !(flags & PATH_TOUCH_VERBATIM))
  73                 cp = 0;
  74         else
  75         {
  76                 cv.tv_sec = tmxsec(ct);
  77                 cv.tv_nsec = tmxnsec(ct);
  78                 cp = &cv;
  79         }
  80         return tvtouch(path, ap, mp, cp, flags & 1);
  81 }