contrib/ldns/compat/timegm.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <ldns/config.h>
   3 #endif
   4
   5 #include <stdio.h>
   6
   7 #ifdef HAVE_STDLIB_H
   8 #include <stdlib.h>
   9 #endif
  10
  11 #include <time.h>
  12
  13 time_t
  14 timegm (struct tm *tm) {
  15         time_t ret;
  16         char *tz;
  17
  18         tz = getenv("TZ");
  19         putenv((char*)"TZ=");
  20         tzset();
  21         ret = mktime(tm);
  22         if (tz) {
  23                 char buf[256];
  24                 snprintf(buf, sizeof(buf), "TZ=%s", tz);
  25                 putenv(tz);
  26         }
  27         else
  28                 putenv((char*)"TZ");
  29         tzset();
  30         return ret;
  31 }