doushifen4060 2019-01-04 08:26
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为什么在OpenWRT上运行Golang的time.Now()总是获得UTC时间?

I wrote a Golang program that runs on OpenWRT.

package main

import (
    "fmt"
    "time"
)

func main(){
    fmt.Println(time.Now())
}

When I run this program on my Macbook, I always get the correct local time.

However, when running this program on OpenWRT, I always get UTC time.

I have set the time zone and time of OpenWRT. When I execute uci show system, I can see the right time zone. When I execute date the right local time can be display correctly.

So my question is, how do I get the correct local time using Golang's time.Now() on OpenWRT?

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2条回答 默认 最新

  • dsvcqvp139098 2019-01-04 10:10
    关注

    The root of my problem is that my OpenWRT lacks the zoneinfo package. So I run opkg update && opkg install zoneinfo-xxx first.

    This is part of go/src/time/zoneinfo_unix.go:

    func initLocal() {
        // consult $TZ to find the time zone to use.
        // no $TZ means use the system default /etc/localtime.
        // $TZ="" means use UTC.
        // $TZ="foo" means use /usr/share/zoneinfo/foo.
    
        ...
    
    }
    

    According to this file, if there is no "TZ" variable, Golang will use the time zone pointed to by /etc/localtime when calling time.Now().

    Then I set time zone at /etc/config/system (option zonename 'xxxxxx') and run /etc/init.d/system restart. Finally, I can get the correct time.Now().

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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