golang执行外部命令超时处理

golang执行外部命令超时处理

不至于当前程序挂起，超时杀死超时进程。

    doneChan := make(chan bool, 1)
    errorChan := make(chan error, 1)

    var cmd *exec.Cmd = exec.Command(name, newArg...)
    go func() {
        output, err := cmd.CombinedOutput()
        if err != nil {
            log.Printf("execute command failed, output: %s, error: %v\n", string(output), err)
            errorChan <- err
            return
        }
        doneChan <- true
    }()

    select {
    case <-time.After(30 * time.Second):
        log.Printf("execute command timeout\n")
        cmd.Process.Kill()
    case <-doneChan:
        // command success
    case err := <-errorChan:
        log.Printf("execute command failure, error: %v\n", err)
        return err
    }