如何获得Go程序以永久阻止

Question

I am trying to get my Go program to block forever, but nothing is working.

Here are some things I have tried:

package main

func main() {
    select{}
}

and

package main

func main() {
    ch := make(chan bool)
    <-ch
}

and

package main

import "sync"

func main() {
    var wg sync.WaitGroup
    wg.Add(1)
    wg.Wait()
}

Each time I get the same error: fatal error: all goroutines are asleep - deadlock!

I thought I have done this before easily. Am I able to get the go program to block forever?

Answer 1

For example, the main goroutine blocks forever,

package main

import (
    "fmt"
    "time"
)

func forever() {
    for {
        fmt.Println(time.Now().UTC())
        time.Sleep(time.Second)
    }
}

func main() {
    go forever()
    select {} // block forever
}

Output:

2017-08-05 02:50:10.138353286 +0000 UTC
2017-08-05 02:50:11.138504194 +0000 UTC
2017-08-05 02:50:12.138618149 +0000 UTC
2017-08-05 02:50:13.138753477 +0000 UTC
2017-08-05 02:50:14.13888856 +0000 UTC
2017-08-05 02:50:15.139027355 +0000 UTC
...
...
...