保持usb外接硬盘活动状态，防止休眠；间隔 1min向usb硬盘中写入一个文件来防止休眠

awake-usbdisk.go

package main

import (
	"io"
	"log"
	"os"
	"time"
)

func main() {
	if len(os.Args) != 2 {
		log.Printf("usage: awake-usbdisk [path-to-usb-disk]")
		os.Exit(1)
	}

	// 取出路径
	path := os.Args[1]
	// 判断是已经存在
	_, err := os.Stat(path)
	if nil == err {
		// 文件存在, 为防止误删数据，退出
		log.Printf("file %v exists!\n", path)
		os.Exit(1)
	}

	ticker := time.NewTicker(1 * time.Minute)
	for {
		log.Printf("shock disk: %v\n", path)

		err := write(path)
		if nil != err {
			log.Printf("failed to write file to %v: %v\n", path, err)
			os.Exit(1)
		}

		err = os.Remove(path)
		if nil != err {
			log.Printf("failed to remove file to %v: %v\n", path, err)
			os.Exit(1)
		}

		<-ticker.C
	}
}

func write(path string) error {
	f, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, 0666)
	if nil != err {
		return err
	}
	defer f.Close()

	_, err = io.WriteString(f, "tick")
	if nil != err {
		return err
	}

	return nil
}