release/src/router/nginx/src/os/unix/ngx_time.c

   1
   2 /*
   3  * Copyright (C) Igor Sysoev
   4  * Copyright (C) Nginx, Inc.
   5  */
   6
   7
   8 #include <ngx_config.h>
   9 #include <ngx_core.h>
  10
  11
  12 /*
  13  * FreeBSD does not test /etc/localtime change, however, we can workaround it
  14  * by calling tzset() with TZ and then without TZ to update timezone.
  15  * The trick should work since FreeBSD 2.1.0.
  16  *
  17  * Linux does not test /etc/localtime change in localtime(),
  18  * but may stat("/etc/localtime") several times in every strftime(),
  19  * therefore we use it to update timezone.
  20  *
  21  * Solaris does not test /etc/TIMEZONE change too and no workaround available.
  22  */
  23
  24 void
  25 ngx_timezone_update(void)
  26 {
  27 #if (NGX_FREEBSD)
  28
  29     if (getenv("TZ")) {
  30         return;
  31     }
  32
  33     putenv("TZ=UTC");
  34
  35     tzset();
  36
  37     unsetenv("TZ");
  38
  39     tzset();
  40
  41 #elif (NGX_LINUX)
  42     time_t      s;
  43     struct tm  *t;
  44     char        buf[4];
  45
  46     s = time(0);
  47
  48     t = localtime(&s);
  49
  50     strftime(buf, 4, "%H", t);
  51
  52 #endif
  53 }
  54
  55
  56 void
  57 ngx_localtime(time_t s, ngx_tm_t *tm)
  58 {
  59 #if (NGX_HAVE_LOCALTIME_R)
  60     (void) localtime_r(&s, tm);
  61
  62 #else
  63     ngx_tm_t  *t;
  64
  65     t = localtime(&s);
  66     *tm = *t;
  67
  68 #endif
  69
  70     tm->ngx_tm_mon++;
  71     tm->ngx_tm_year += 1900;
  72 }
  73
  74
  75 void
  76 ngx_libc_localtime(time_t s, struct tm *tm)
  77 {
  78 #if (NGX_HAVE_LOCALTIME_R)
  79     (void) localtime_r(&s, tm);
  80
  81 #else
  82     struct tm  *t;
  83
  84     t = localtime(&s);
  85     *tm = *t;
  86
  87 #endif
  88 }
  89
  90
  91 void
  92 ngx_libc_gmtime(time_t s, struct tm *tm)
  93 {
  94 #if (NGX_HAVE_LOCALTIME_R)
  95     (void) gmtime_r(&s, tm);
  96
  97 #else
  98     struct tm  *t;
  99
 100     t = gmtime(&s);
 101     *tm = *t;
 102
 103 #endif
 104 }