package utils

import (
	"bytes"
	"errors"
	"io"
	"os/exec"
	"strings"
)

func RunCommand(cmdString string, reader io.Reader, ifout bool) ([]byte, error) {
	// fmt.Println(cmdString)
	cmds := strings.Split(cmdString, " ")
	cmd2 := exec.Command(cmds[0], cmds[1:]...)
	if reader != nil {
		cmd2.Stdin = reader //bytes.NewReader(*stdin)
	}
	var stderr bytes.Buffer
	cmd2.Stderr = &stderr //命令输出的错误1.
	var stdout bytes.Buffer
	if ifout {
		cmd2.Stdout = &stdout //命令的输出 1.
	}
	err := cmd2.Run()
	s := stderr.String() //得到命令输出的错误2.
	if ifout {
		sout := stdout.Bytes() //得到命令的输出 2.
		if len(sout) > 0 {
			return sout, err
		}
	}
	if s != "" {
		err = errors.New(s)
	}
	return nil, err
}