从exec命令标准输出读取而不进行缓冲

I'm running a command in Go via exec.Command and scanning the output. On some systems the output is immediate. But on some systems the output seems to be buffered. Unless the amount of data produced by the command is large enough, I don't actually receive the output.

Is there anyway to get more immediate output, reliably?

package main

import (
        "fmt"
        "log"
        "os/exec"
        "time"
)

func main() {
        cmd := exec.Command("udevadm", "monitor")
        stdout, err := cmd.StdoutPipe()
        if err != nil {
                log.Fatal(err)
        }

        err = cmd.Start()
        if err != nil {
                log.Fatal(err)
        }

        for {
                p := make([]byte, 10)
                n, _ := stdout.Read(p)
                fmt.Println("@ ", time.Now().Unix(), " ", n)
        }
}

I will propose that running stdbuf -oL udevadm <args> will achieve effectively what i"m after (line buffered output).