time/ftime.c

   1 /* Copyright (C) 1994-2017 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <time.h>
  20 #include <sys/timeb.h>
  21
  22 int
  23 ftime (struct timeb *timebuf)
  24 {
  25   int save = errno;
  26   struct tm tp;
  27
  28   __set_errno (0);
  29   if (time (&timebuf->time) == (time_t) -1 && errno != 0)
  30     return -1;
  31   timebuf->millitm = 0;
  32
  33   if (__localtime_r (&timebuf->time, &tp) == NULL)
  34     return -1;
  35
  36   timebuf->timezone = tp.tm_gmtoff / 60;
  37   timebuf->dstflag = tp.tm_isdst;
  38
  39   __set_errno (save);
  40   return 0;
  41 }