7044727: (tz) TimeZone.getDefault() call returns incorrect value in Windows terminal session
Reviewed-by: peytoia
This commit is contained in:
Masayoshi Okutsu
parent
afdabb44dc
commit
204901217f
@ -147,219 +147,248 @@ static void customZoneName(LONG bias, char *buffer) {
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*/
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static int getWinTimeZone(char *winZoneName, char *winMapID)
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{
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TIME_ZONE_INFORMATION tzi;
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OSVERSIONINFO ver;
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int onlyMapID;
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HANDLE hKey = NULL, hSubKey = NULL;
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LONG ret;
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DWORD nSubKeys, i;
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ULONG valueType;
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TCHAR subKeyName[MAX_ZONE_CHAR];
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TCHAR szValue[MAX_ZONE_CHAR];
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WCHAR stdNameInReg[MAX_ZONE_CHAR];
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TziValue tempTzi;
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WCHAR *stdNamePtr = tzi.StandardName;
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DWORD valueSize;
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DYNAMIC_TIME_ZONE_INFORMATION dtzi;
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DWORD timeType;
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int isVista;
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DWORD bufSize;
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DWORD val;
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HANDLE hKey = NULL;
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LONG ret;
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ULONG valueType;
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/*
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* Get the current time zone setting of the platform.
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* Get the dynamic time zone information so that time zone redirection
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* can be supported. (see JDK-7044727)
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*/
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timeType = GetTimeZoneInformation(&tzi);
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timeType = GetDynamicTimeZoneInformation(&dtzi);
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if (timeType == TIME_ZONE_ID_INVALID) {
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goto err;
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}
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/*
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* Determine if this is an NT system.
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* Make sure TimeZoneKeyName is available from the API call. If
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* DynamicDaylightTime is disabled, return a custom time zone name
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* based on the GMT offset. Otherwise, return the TimeZoneKeyName
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* value.
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*/
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ver.dwOSVersionInfoSize = sizeof(ver);
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GetVersionEx(&ver);
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isVista = ver.dwMajorVersion >= 6;
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if (dtzi.TimeZoneKeyName[0] != 0) {
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if (dtzi.DynamicDaylightTimeDisabled) {
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customZoneName(dtzi.Bias, winZoneName);
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return VALUE_GMTOFFSET;
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}
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wcstombs(winZoneName, dtzi.TimeZoneKeyName, MAX_ZONE_CHAR);
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return VALUE_KEY;
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}
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_CURRENT_TZ_KEY, 0,
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KEY_READ, (PHKEY)&hKey);
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if (ret == ERROR_SUCCESS) {
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DWORD val;
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DWORD bufSize;
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/*
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* If TimeZoneKeyName is not available, check whether StandardName
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* is available to fall back to the older API GetTimeZoneInformation.
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* If not, directly read the value from registry keys.
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*/
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if (dtzi.StandardName[0] == 0) {
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_CURRENT_TZ_KEY, 0,
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KEY_READ, (PHKEY)&hKey);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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/*
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* Determine if auto-daylight time adjustment is turned off.
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*/
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valueType = 0;
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bufSize = sizeof(val);
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ret = RegQueryValueExA(hKey, "DisableAutoDaylightTimeSet",
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NULL, &valueType, (LPBYTE) &val, &bufSize);
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/*
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* Vista uses the different key name.
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*/
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ret = RegQueryValueExA(hKey, "DynamicDaylightTimeDisabled", NULL,
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&valueType, (LPBYTE) &val, &bufSize);
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if (ret != ERROR_SUCCESS) {
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bufSize = sizeof(val);
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ret = RegQueryValueExA(hKey, "DynamicDaylightTimeDisabled",
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NULL, &valueType, (LPBYTE) &val, &bufSize);
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goto err;
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}
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if (ret == ERROR_SUCCESS) {
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int daylightSavingsUpdateDisabledOther = val == 1 && tzi.DaylightDate.wMonth != 0;
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int daylightSavingsUpdateDisabledVista = val == 1;
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int daylightSavingsUpdateDisabled = isVista ? daylightSavingsUpdateDisabledVista : daylightSavingsUpdateDisabledOther;
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if (daylightSavingsUpdateDisabled) {
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(void) RegCloseKey(hKey);
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customZoneName(tzi.Bias, winZoneName);
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return VALUE_GMTOFFSET;
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}
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}
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/*
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* Vista has the key for the current "Time Zones" entry.
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* Return a custom time zone name if auto-daylight time adjustment
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* is disabled.
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*/
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if (isVista) {
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valueType = 0;
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bufSize = MAX_ZONE_CHAR;
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ret = RegQueryValueExA(hKey, "TimeZoneKeyName", NULL,
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&valueType, (LPBYTE) winZoneName, &bufSize);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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if (val == 1) {
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customZoneName(dtzi.Bias, winZoneName);
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(void) RegCloseKey(hKey);
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return VALUE_KEY;
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return VALUE_GMTOFFSET;
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}
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/*
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* Win32 problem: If the length of the standard time name is equal
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* to (or probably longer than) 32 in the registry,
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* GetTimeZoneInformation() on NT returns a null string as its
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* standard time name. We need to work around this problem by
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* getting the same information from the TimeZoneInformation
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* registry. The function on Win98 seems to return its key name.
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* We can't do anything in that case.
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*/
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if (tzi.StandardName[0] == 0) {
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bufSize = sizeof(stdNameInReg);
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ret = getValueInRegistry(hKey, STANDARD_NAME, &valueType,
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(LPBYTE) stdNameInReg, &bufSize);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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stdNamePtr = stdNameInReg;
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bufSize = MAX_ZONE_CHAR;
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ret = RegQueryValueExA(hKey, "TimeZoneKeyName", NULL,
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&valueType, (LPBYTE) winZoneName, &bufSize);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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(void) RegCloseKey(hKey);
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}
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/*
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* Open the "Time Zones" registry.
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*/
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, NT_TZ_KEY, 0, KEY_READ, (PHKEY)&hKey);
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if (ret != ERROR_SUCCESS) {
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_TZ_KEY, 0, KEY_READ, (PHKEY)&hKey);
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return VALUE_KEY;
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} else {
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/*
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* If both failed, then give up.
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* Fall back to GetTimeZoneInformation
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*/
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if (ret != ERROR_SUCCESS) {
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return VALUE_UNKNOWN;
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}
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}
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TIME_ZONE_INFORMATION tzi;
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HANDLE hSubKey = NULL;
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DWORD nSubKeys, i;
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ULONG valueType;
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TCHAR subKeyName[MAX_ZONE_CHAR];
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TCHAR szValue[MAX_ZONE_CHAR];
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WCHAR stdNameInReg[MAX_ZONE_CHAR];
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TziValue tempTzi;
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WCHAR *stdNamePtr = tzi.StandardName;
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DWORD valueSize;
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int onlyMapID;
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/*
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* Get the number of subkeys of the "Time Zones" registry for
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* enumeration.
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*/
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ret = RegQueryInfoKey(hKey, NULL, NULL, NULL, &nSubKeys,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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/*
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* Compare to the "Std" value of each subkey and find the entry that
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* matches the current control panel setting.
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*/
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onlyMapID = 0;
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for (i = 0; i < nSubKeys; ++i) {
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DWORD size = sizeof(subKeyName);
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ret = RegEnumKeyEx(hKey, i, subKeyName, &size, NULL, NULL, NULL, NULL);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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ret = RegOpenKeyEx(hKey, subKeyName, 0, KEY_READ, (PHKEY)&hSubKey);
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if (ret != ERROR_SUCCESS) {
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timeType = GetTimeZoneInformation(&tzi);
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if (timeType == TIME_ZONE_ID_INVALID) {
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goto err;
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}
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size = sizeof(szValue);
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ret = getValueInRegistry(hSubKey, STD_NAME, &valueType,
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szValue, &size);
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if (ret != ERROR_SUCCESS) {
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_CURRENT_TZ_KEY, 0,
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KEY_READ, (PHKEY)&hKey);
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if (ret == ERROR_SUCCESS) {
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/*
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* NT 4.0 SP3 fails here since it doesn't have the "Std"
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* entry in the Time Zones registry.
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* Determine if auto-daylight time adjustment is turned off.
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*/
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RegCloseKey(hSubKey);
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onlyMapID = 1;
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ret = RegOpenKeyExW(hKey, stdNamePtr, 0, KEY_READ, (PHKEY)&hSubKey);
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bufSize = sizeof(val);
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ret = RegQueryValueExA(hKey, "DynamicDaylightTimeDisabled", NULL,
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&valueType, (LPBYTE) &val, &bufSize);
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if (ret == ERROR_SUCCESS) {
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if (val == 1 && tzi.DaylightDate.wMonth != 0) {
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(void) RegCloseKey(hKey);
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customZoneName(tzi.Bias, winZoneName);
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return VALUE_GMTOFFSET;
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}
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}
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/*
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* Win32 problem: If the length of the standard time name is equal
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* to (or probably longer than) 32 in the registry,
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* GetTimeZoneInformation() on NT returns a null string as its
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* standard time name. We need to work around this problem by
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* getting the same information from the TimeZoneInformation
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* registry.
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*/
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if (tzi.StandardName[0] == 0) {
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bufSize = sizeof(stdNameInReg);
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ret = getValueInRegistry(hKey, STANDARD_NAME, &valueType,
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(LPBYTE) stdNameInReg, &bufSize);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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stdNamePtr = stdNameInReg;
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}
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(void) RegCloseKey(hKey);
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}
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/*
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* Open the "Time Zones" registry.
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*/
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, NT_TZ_KEY, 0, KEY_READ, (PHKEY)&hKey);
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if (ret != ERROR_SUCCESS) {
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_TZ_KEY, 0, KEY_READ, (PHKEY)&hKey);
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/*
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* If both failed, then give up.
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*/
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if (ret != ERROR_SUCCESS) {
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return VALUE_UNKNOWN;
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}
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}
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/*
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* Get the number of subkeys of the "Time Zones" registry for
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* enumeration.
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*/
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ret = RegQueryInfoKey(hKey, NULL, NULL, NULL, &nSubKeys,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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/*
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* Compare to the "Std" value of each subkey and find the entry that
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* matches the current control panel setting.
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*/
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onlyMapID = 0;
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for (i = 0; i < nSubKeys; ++i) {
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DWORD size = sizeof(subKeyName);
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ret = RegEnumKeyEx(hKey, i, subKeyName, &size, NULL, NULL, NULL, NULL);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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ret = RegOpenKeyEx(hKey, subKeyName, 0, KEY_READ, (PHKEY)&hSubKey);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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break;
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}
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if (wcscmp((WCHAR *)szValue, stdNamePtr) == 0) {
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/*
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* Some localized Win32 platforms use a same name to
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* different time zones. So, we can't rely only on the name
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* here. We need to check GMT offsets and transition dates
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* to make sure it's the registry of the current time
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* zone.
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*/
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DWORD tziValueSize = sizeof(tempTzi);
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ret = RegQueryValueEx(hSubKey, "TZI", NULL, &valueType,
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(unsigned char *) &tempTzi, &tziValueSize);
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if (ret == ERROR_SUCCESS) {
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if ((tzi.Bias != tempTzi.bias) ||
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(memcmp((const void *) &tzi.StandardDate,
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(const void *) &tempTzi.stdDate,
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sizeof(SYSTEMTIME)) != 0)) {
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goto out;
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size = sizeof(szValue);
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ret = getValueInRegistry(hSubKey, STD_NAME, &valueType,
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szValue, &size);
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if (ret != ERROR_SUCCESS) {
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/*
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* NT 4.0 SP3 fails here since it doesn't have the "Std"
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* entry in the Time Zones registry.
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*/
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RegCloseKey(hSubKey);
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onlyMapID = 1;
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ret = RegOpenKeyExW(hKey, stdNamePtr, 0, KEY_READ, (PHKEY)&hSubKey);
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if (ret != ERROR_SUCCESS) {
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goto err;
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}
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break;
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}
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if (tzi.DaylightBias != 0) {
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if ((tzi.DaylightBias != tempTzi.dstBias) ||
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(memcmp((const void *) &tzi.DaylightDate,
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(const void *) &tempTzi.dstDate,
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if (wcscmp((WCHAR *)szValue, stdNamePtr) == 0) {
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/*
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* Some localized Win32 platforms use a same name to
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* different time zones. So, we can't rely only on the name
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* here. We need to check GMT offsets and transition dates
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* to make sure it's the registry of the current time
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* zone.
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*/
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DWORD tziValueSize = sizeof(tempTzi);
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ret = RegQueryValueEx(hSubKey, "TZI", NULL, &valueType,
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(unsigned char *) &tempTzi, &tziValueSize);
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if (ret == ERROR_SUCCESS) {
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if ((tzi.Bias != tempTzi.bias) ||
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(memcmp((const void *) &tzi.StandardDate,
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(const void *) &tempTzi.stdDate,
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sizeof(SYSTEMTIME)) != 0)) {
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goto out;
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}
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if (tzi.DaylightBias != 0) {
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if ((tzi.DaylightBias != tempTzi.dstBias) ||
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(memcmp((const void *) &tzi.DaylightDate,
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(const void *) &tempTzi.dstDate,
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sizeof(SYSTEMTIME)) != 0)) {
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goto out;
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}
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}
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}
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/*
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* found matched record, terminate search
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*/
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strcpy(winZoneName, subKeyName);
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break;
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}
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/*
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* found matched record, terminate search
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*/
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strcpy(winZoneName, subKeyName);
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break;
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out:
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(void) RegCloseKey(hSubKey);
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}
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out:
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(void) RegCloseKey(hSubKey);
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}
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/*
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* Get the "MapID" value of the registry to be able to eliminate
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* duplicated key names later.
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*/
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valueSize = MAX_MAPID_LENGTH;
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ret = RegQueryValueExA(hSubKey, "MapID", NULL, &valueType, winMapID, &valueSize);
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(void) RegCloseKey(hSubKey);
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(void) RegCloseKey(hKey);
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if (ret != ERROR_SUCCESS) {
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/*
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* Vista doesn't have mapID. VALUE_UNKNOWN should be returned
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* only for Windows NT.
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* Get the "MapID" value of the registry to be able to eliminate
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* duplicated key names later.
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*/
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if (onlyMapID == 1) {
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return VALUE_UNKNOWN;
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valueSize = MAX_MAPID_LENGTH;
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ret = RegQueryValueExA(hSubKey, "MapID", NULL, &valueType, winMapID, &valueSize);
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(void) RegCloseKey(hSubKey);
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(void) RegCloseKey(hKey);
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if (ret != ERROR_SUCCESS) {
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/*
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* Vista doesn't have mapID. VALUE_UNKNOWN should be returned
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* only for Windows NT.
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*/
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if (onlyMapID == 1) {
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return VALUE_UNKNOWN;
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}
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}
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}
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