// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

//! @brief set local/system date and time

#include "setdate.h"

#include <assert.h>

#include <errno.h>

#include <langinfo.h>

#include <locale.h>

#include <string>

#include <time.h>

#include <sys/time.h>

//! @brief SetDate sets the date and time on local computer.

//! You must be super-user to set the time.

//! See comment in setdate.h about the use of private_tm

//!

//! SetDate

//!

//! @retval 0 successfully set date

//! @retval -1 if failure occurred.

//!

int32_t SetDate(struct private_tm* time)

{

errno = 0;

// Select locale from environment

setlocale(LC_ALL, "");

struct timeval tv;

int32_t result = GetTimeVal(*time,tv);

if(result != 0)

{

return result;

}

return settimeofday(&tv, NULL);

}

static int32_t GetTimeVal(struct private_tm& time, struct timeval& tv)

{

struct tm nativeTime = {0};

nativeTime.tm_hour = static_cast<int>(time.Hour);

nativeTime.tm_isdst = static_cast<int>(time.IsDst);

nativeTime.tm_mday = static_cast<int>(time.DayOfMonth);

nativeTime.tm_min = static_cast<int>(time.Minutes);

nativeTime.tm_mon = static_cast<int>(time.Month);

nativeTime.tm_sec = static_cast<int>(time.Seconds);

nativeTime.tm_wday = static_cast<int>(time.DayOfWeek);

nativeTime.tm_yday = static_cast<int>(time.DayInYear);

nativeTime.tm_year = static_cast<int>(time.Year);

time_t newTime = mktime(&nativeTime);

if (newTime == -1)

{

return -1;

}

tv.tv_sec = newTime;

tv.tv_usec = 0;

return 0;

}