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fix(os): Ubuntu 18.04 timezone error.

This commit is contained in:
afwerar 2022-05-11 15:18:26 +08:00
parent f21348a393
commit a816e3034e
1 changed files with 98 additions and 96 deletions
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194
source/os/src/osTimezone.c
View File

@ -172,106 +172,108 @@ void taosGetSystemTimezone(char *outTimezoneStr, enum TdTimezone *tsTimezone) {
-timezone / 3600);
#else
if (taosCheckExistFile("/etc/timezone")) {
/*
* 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));
} else {
char buf[4096] = {0};
char *tz = NULL;
{
int n = readlink("/etc/localtime", buf, sizeof(buf));
if (n < 0) {
printf("read /etc/localtime error, reason:%s", strerror(errno));
return;
}
buf[n] = '\0';
for (int i = n - 1; i >= 0; --i) {
if (buf[i] == '/') {
if (tz) {
tz = buf + i + 1;
break;
char buf[4096] = {0};
char *tz = NULL;
{
int n = readlink("/etc/localtime", buf, sizeof(buf));
if (n < 0) {
printf("read /etc/localtime error, reason:%s", strerror(errno));
if (taosCheckExistFile("/etc/timezone")) {
/*
* 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;
}
tz = buf + i + 1;
}
}
if (!tz || 0 == strchr(tz, '/')) {
printf("parsing /etc/localtime failed");
return;
}
setenv("TZ", tz, 1);
tzset();
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));
} else {
printf("There is not /etc/timezone.\n");
}
return;
}
buf[n] = '\0';
for (int i = n - 1; i >= 0; --i) {
if (buf[i] == '/') {
if (tz) {
tz = buf + i + 1;
break;
}
tz = buf + i + 1;
}
}
if (!tz || 0 == strchr(tz, '/')) {
printf("parsing /etc/localtime failed");
return;
}
/*
* 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);
/*
* format example:
*
* Asia/Shanghai (CST, +0800)
* Europe/London (BST, +0100)
*/
snprintf(outTimezoneStr, TD_TIMEZONE_LEN, "%s (%s, %+03ld00)", tz, tm1.tm_isdst ? tzname[daylight] : tzname[0],
-timezone / 3600);
setenv("TZ", tz, 1);
tzset();
}
/*
* 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);
/*
* format example:
*
* Asia/Shanghai (CST, +0800)
* Europe/London (BST, +0100)
*/
snprintf(outTimezoneStr, TD_TIMEZONE_LEN, "%s (%s, %+03ld00)", tz, tm1.tm_isdst ? tzname[daylight] : tzname[0],
-timezone / 3600);
#endif
}