GO语言菜谱

分别捕获exec.Command()标准输出和错误输出

参考：https://blog.kowalczyk.info/article/wOYk/advanced-command-execution-in-go-with-osexec.html

func main() {
    cmd := exec.Command("ls", "-lah")
    var stdout, stderr bytes.Buffer
    cmd.Stdout = &stdout
    cmd.Stderr = &stderr
    err := cmd.Run()
    if err != nil {
        log.Fatalf("cmd.Run() failed with %s\n", err)
    }
    outStr, errStr := string(stdout.Bytes()), string(stderr.Bytes())
    fmt.Printf("out:\n%s\nerr:\n%s\n", outStr, errStr)
}