1 /*
2 * Copyright (C) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "time_zone_info.h"
17
18 #include "time_file_utils.h"
19
20 namespace OHOS {
21 namespace MiscServices {
22 namespace {
23 constexpr const char *TIMEZONE_KEY = "persist.time.timezone";
24 constexpr const char *TIMEZONE_PATH = "/system/etc/zoneinfo/";
25 const int TIMEZONE_OK = 0;
26 const int CONFIG_LEN = 35;
27 const int HOUR_TO_MIN = 60;
28 } // namespace
29
TimeZoneInfo()30 TimeZoneInfo::TimeZoneInfo()
31 {
32 }
33
~TimeZoneInfo()34 TimeZoneInfo::~TimeZoneInfo()
35 {
36 }
37
Init()38 void TimeZoneInfo::Init()
39 {
40 TIME_HILOGD(TIME_MODULE_SERVICE, "Start.");
41 char value[CONFIG_LEN] = "Asia/Shanghai";
42 if (GetParameter(TIMEZONE_KEY, "", value, CONFIG_LEN) < TIMEZONE_OK) {
43 TIME_HILOGW(TIME_MODULE_SERVICE, "No found timezone from system parameter.");
44 }
45 if (!SetTimezone(value)) {
46 TIME_HILOGE(TIME_MODULE_SERVICE, "Init Set kernel failed.");
47 }
48 curTimezoneId_ = value;
49 TIME_HILOGD(TIME_MODULE_SERVICE, "Timezone value: %{public}s", value);
50 }
51
SetTimezone(const std::string & timezoneId)52 bool TimeZoneInfo::SetTimezone(const std::string &timezoneId)
53 {
54 TIME_HILOGD(TIME_MODULE_SERVICE, "Set timezone");
55 std::lock_guard<std::mutex> lock(timezoneMutex_);
56 if (curTimezoneId_ == timezoneId) {
57 TIME_HILOGI(TIME_MODULE_SERVICE, "Same Timezone has been set.");
58 return true;
59 }
60 if (!TimeFileUtils::IsExistFile(std::string(TIMEZONE_PATH).append(timezoneId))) {
61 TIME_HILOGE(TIME_MODULE_SERVICE, "Invalid timezone");
62 return false;
63 }
64 setenv("TZ", timezoneId.c_str(), 1);
65 tzset();
66 if (!SetTimezoneToKernel()) {
67 TIME_HILOGE(TIME_MODULE_SERVICE, "SetTimezone Set kernel failed.");
68 return false;
69 }
70 auto errNo = SetParameter(TIMEZONE_KEY, timezoneId.c_str());
71 if (errNo > TIMEZONE_OK) {
72 TIME_HILOGE(TIME_MODULE_SERVICE, "SetTimezone timezoneId: %{public}d: %{public}s", errNo, timezoneId.c_str());
73 return false;
74 }
75 curTimezoneId_ = timezoneId;
76 return true;
77 }
78
GetTimezone(std::string & timezoneId)79 bool TimeZoneInfo::GetTimezone(std::string &timezoneId)
80 {
81 timezoneId = curTimezoneId_;
82 return true;
83 }
84
SetTimezoneToKernel()85 bool TimeZoneInfo::SetTimezoneToKernel()
86 {
87 time_t t = time(nullptr);
88 struct tm *localTime = localtime(&t);
89 struct timezone tz {};
90 tz.tz_minuteswest = localTime->tm_gmtoff / HOUR_TO_MIN;
91 tz.tz_dsttime = 0;
92 int result = settimeofday(nullptr, &tz);
93 if (result < 0) {
94 TIME_HILOGE(TIME_MODULE_SERVICE, "Settimeofday timezone fail: %{public}d.", result);
95 return false;
96 }
97 TIME_HILOGD(TIME_MODULE_SERVICE, "Settimeofday timezone success ");
98 return true;
99 }
100 } // namespace MiscServices
101 } // namespace OHOS