在Golang中终止以os / exec开头的进程

Question

有没有办法终止Golang中以os.exec开始的进程？例如（来自http://golang.org/pkg/os/exec/#example_Cmd_Start），cmd := exec.Command("sleep", "5")err := cmd.Start()if err != nil {    log.Fatal(err)}log.Printf("Waiting for command to finish...")err = cmd.Wait()log.Printf("Command finished with error: %v", err)是否有办法提前（可能在3秒后）终止该过程？

Answer 1

终止运行exec.Process：

// Start a process:

cmd := exec.Command("sleep", "5")

if err := cmd.Start(); err != nil {

    log.Fatal(err)

}

// Kill it:

if err := cmd.Process.Kill(); err != nil {

    log.Fatal("failed to kill process: ", err)

}

exec.Process超时后终止运行：

// Start a process:

cmd := exec.Command("sleep", "5")

if err := cmd.Start(); err != nil {

    log.Fatal(err)

}

// Wait for the process to finish or kill it after a timeout (whichever happens first):

done := make(chan error, 1)

go func() {

    done <- cmd.Wait()

}()

select {

case <-time.After(3 * time.Second):

    if err := cmd.Process.Kill(); err != nil {

        log.Fatal("failed to kill process: ", err)

    }

    log.Println("process killed as timeout reached")

case err := <-done:

    if err != nil {

        log.Fatalf("process finished with error = %v", err)

    }

    log.Print("process finished successfully")

}

该过程结束并且在done3秒钟内收到了错误（如果有的话），并且该程序在完成之前被终止了。