如何在stdout/stderr中显示命令的输出，同时将输出保存到Go中的变量中？

import "os/exec"

cmd := exec.Command("command", "arg1", "arg2")

var stdout, stderr bytes.Buffer
cmd.Stdout = &stdout
cmd.Stderr = &stderr

err := cmd.Run()
if err != nil {
    // 处理错误
}

output := stdout.String()

package main

import (
    "bytes"
    "fmt"
    "os/exec"
)

func main() {
    cmd := exec.Command("ls", "-l")
    var stdout, stderr bytes.Buffer
    cmd.Stdout = &stdout
    cmd.Stderr = &stderr

    err := cmd.Run()
    if err != nil {
        fmt.Println("命令执行失败：", err)
        return
    }

    output := stdout.String()
    fmt.Println("命令输出：", output)
}