libexec/bootpd/tzone.c

   1 /*
   2  * tzone.c - get the timezone
   3  *
   4  * This is shared by bootpd and bootpef
   5  *
   6  * $FreeBSD: src/libexec/bootpd/tzone.c,v 1.1.1.1.14.1 2000/11/11 00:10:41 dirk Exp $
   7  * $DragonFly: src/libexec/bootpd/tzone.c,v 1.2 2003/06/17 04:27:07 dillon Exp $
   8  */
   9
  10 #ifdef  SVR4
  11 /* XXX - Is this really SunOS specific? -gwr */
  12 /* This is in <time.h> but only visible if (__STDC__ == 1). */
  13 extern long timezone;
  14 #else /* SVR4 */
  15 /* BSD or SunOS */
  16 # include <time.h>
  17 # include <syslog.h>
  18 #endif /* SVR4 */
  19
  20 #include "bptypes.h"
  21 #include "report.h"
  22 #include "tzone.h"
  23
  24 /* This is what other modules use. */
  25 int32 secondswest;
  26
  27 /*
  28  * Get our timezone offset so we can give it to clients if the
  29  * configuration file doesn't specify one.
  30  */
  31 void
  32 tzone_init()
  33 {
  34 #ifdef  SVR4
  35         /* XXX - Is this really SunOS specific? -gwr */
  36         secondswest = timezone;
  37 #else /* SVR4 */
  38         struct tm *tm;
  39         time_t now;
  40
  41         (void)time(&now);
  42         if ((tm = localtime(&now)) == NULL) {
  43                 secondswest = 0;                /* Assume GMT for lack of anything better */
  44                 report(LOG_ERR, "localtime() failed");
  45         } else {
  46                 secondswest = -tm->tm_gmtoff;
  47         }
  48 #endif /* SVR4 */
  49 }