如何通过golang获取环境变量PS1？

PS1 is an environment variable for bash prompt. I can get this by echo $PS1

I try to use os.Getenv to get PS1 but returns nothing:

package main

import (
  "fmt"
  "os"
)

func main() {
  fmt.Println(os.Getenv("PS1"))
}

Why does this happen and how should I fix this? Thanks.

PS1 is probably not exported, meaning it won't show up in sub-processes of bash

try

export PS1

before you run your app

you could also do

PS1=$PS1 app

to set it specifically in the sub process