如何在交互式shell中执行多个命令

My application works with all kind of shell commands, provided from the console (curl, date, ping, whatever). Now I'd like to cover the case with interactive shell commands (like mongo shell), using os/exec.

• e.g. as a first step, connect to mongodb: mongo --quiet --host=localhost blog

• then perform arbitrary number of commands, getting the result on every step db.getCollection('posts').find({status:'INACTIVE'})

• and then exit

I tried the following, but it allows me to perform only one command per mongo connection:

func main() {

    cmd := exec.Command("sh", "-c", "mongo --quiet --host=localhost blog")

    cmd.Stdout = os.Stdout
    cmd.Stderr = os.Stderr

    stdin, _ := cmd.StdinPipe()

    go func() {
        defer stdin.Close()
        io.WriteString(stdin, "db.getCollection('posts').find({status:'INACTIVE'}).itcount()")
        // fails, if I'll do one more here
    }()

    cmd.Run()
    cmd.Wait()
}

Is there a way to run multiple commands, getting stdout result per executed command?