time/ftime.c

   1 /* Copyright (C) 1994, 1996, 1997, 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <time.h>
  21 #include <sys/timeb.h>
  22
  23 int
  24 ftime (timebuf)
  25      struct timeb *timebuf;
  26 {
  27   int save = errno;
  28   struct tm tp;
  29
  30   __set_errno (0);
  31   if (time (&timebuf->time) == (time_t) -1 && errno != 0)
  32     return -1;
  33   timebuf->millitm = 0;
  34
  35   if (__localtime_r (&timebuf->time, &tp) == NULL)
  36     return -1;
  37
  38   timebuf->timezone = tp.tm_gmtoff / 60;
  39   timebuf->dstflag = tp.tm_isdst;
  40
  41   __set_errno (save);
  42   return 0;
  43 }