go语言简单的执行shell命令

package main

import(

    "fmt"

    "os/exec"

    "os"

    "strings"

)

func main(){

    fmt.Println("shell")

    var str,ip,data []byte

    var err error

    var cmd *exec.Cmd

    //

    cmd = exec.Command("whoami")

    str,err = cmd.Output()

    if err!=nil{

        fmt.Println(err)

        os.Exit(1)

    }

    fmt.Println(string(str))

    fmt.Println("=======")

    //filter line breaks

    fmt.Println(strings.Trim(string(str),"\n"))

    //get IP ,Mac platform,can not implement

    fmt.Println("=======")

    cmd = exec.Command("/bin/sh", "-c", `/sbin/ifconfig en0 | grep -E 'inet ' | awk '{print $2}'`)

    ip,err = cmd.Output()

    if err!=nil{

        fmt.Println(err)

        os.Exit(1)

    }

    fmt.Println(string(ip))

    fmt.Println(strings.Trim(string(ip),"\n"))

    //implement command

    fmt.Println("====================")

    cmd = exec.Command("/bin/sh","-c","echo wo shi shui wo zai na")

    data,err = cmd.Output()

    if err!=nil{

        fmt.Println(err)

        os.Exit(1)

    }

    fmt.Println(string(data))

    fmt.Println(strings.Trim(string(data),"\n"))

}