通过管道可以实现多个进程间通信，协程之间也是可以的

package main

import (
    "fmt"
    "time"
    "os"
    "io/ioutil"
)

func NewPipe() (*os.File, *os.File, error) {
    read, write, err := os.Pipe()
    if err != nil {
        return nil, nil, err
    }
    return read, write, nil
}

func main() {

    fmt.Println("main starting")
    stop := make(chan int)
    r ,w ,_:= NewPipe()
    go func() {
        fmt.Println("int go run")
        msg,_ := ioutil.ReadAll(r)
        fmt.Printf("int go run get msg %s \n",string(msg))
        <-stop
    }()

    w.WriteString("hello world")
    w.Close()
    time.Sleep(time.Second*3)
    stop <- 1
    fmt.Println("main end")

}

上面的代码先创建一个管道，分别给main和协程，运行并测试

main starting
int go run
int go run get msg hello world 
main end