Merge pull request #12319 from taosdata/fix/ZhiqiangWang/fix-15436-centos-timezone-error

fix(os): centos timezone error.

source/os/src/osTimezone.c

@@ -125,7 +125,7 @@ void taosGetSystemTimezone(char *outTimezoneStr, enum TdTimezone *tsTimezone) {
     strcpy(outTimezoneStr, tz);
   }
 
-#elif defined(_TD_DARWIN_64)
+#else
   char  buf[4096] = {0};
   char *tz = NULL;
   {
@@ -170,64 +170,5 @@ void taosGetSystemTimezone(char *outTimezoneStr, enum TdTimezone *tsTimezone) {
    */
   snprintf(outTimezoneStr, TD_TIMEZONE_LEN, "%s (%s, %+03ld00)", tz, tm1.tm_isdst ? tzname[daylight] : tzname[0],
            -timezone / 3600);
-
-#else
-  /*
-   * NOTE: do not remove it.
-   * Enforce set the correct daylight saving time(DST) flag according
-   * to current time
-   */
-  time_t    tx1 = taosGetTimestampSec();
-  struct tm tm1;
-  taosLocalTime(&tx1, &tm1);
-
-  /* load time zone string from /etc/timezone */
-  // FILE *f = fopen("/etc/timezone", "r");
-  errno = 0;
-  TdFilePtr pFile = taosOpenFile("/etc/timezone", TD_FILE_READ);
-  char  buf[68] = {0};
-  if (pFile != NULL) {
-    int len = taosReadFile(pFile, buf, 64);
-    if (len < 64 && taosGetErrorFile(pFile)) {
-      taosCloseFile(&pFile);
-      printf("read /etc/timezone error, reason:%s", strerror(errno));
-      return;
-    }
-
-    taosCloseFile(&pFile);
-
-    buf[sizeof(buf) - 1] = 0;
-    char *lineEnd = strstr(buf, "\n");
-    if (lineEnd != NULL) {
-      *lineEnd = 0;
-    }
-
-    // for CentOS system, /etc/timezone does not exist. Ignore the TZ environment variables
-    if (strlen(buf) > 0) {
-      setenv("TZ", buf, 1);
-    }
-  }
-  // get and set default timezone
-  tzset();
-
-  /*
-   * get CURRENT time zone.
-   * system current time zone is affected by daylight saving time(DST)
-   *
-   * e.g., the local time zone of London in DST is GMT+01:00,
-   * otherwise is GMT+00:00
-   */
-  int32_t tz = (-timezone * MILLISECOND_PER_SECOND) / MILLISECOND_PER_HOUR;
-  *tsTimezone = tz;
-  tz += daylight;
-
-  /*
-   * format example:
-   *
-   * Asia/Shanghai   (CST, +0800)
-   * Europe/London   (BST, +0100)
-   */
-  snprintf(outTimezoneStr, TD_TIMEZONE_LEN, "%s (%s, %s%02d00)", buf, tzname[daylight], tz >= 0 ? "+" : "-", abs(tz));
-
 #endif
 }