dongyi1441 2013-08-25 03:43 采纳率: 100%
浏览 282


I'm trying to enumerate over a list of values in the Windows registry using Go, but I'm running into some trouble. I've tried two approaches: using both the Go-provided syscall library to call into RegEnumValue, as well as using a Windows API wrapper by lxn. In both cases, I'm having the same issue. This is the code I'm using (which is currently using the win library from lxn):

var root win.HKEY
rootpath, _ := syscall.UTF16PtrFromString("HARDWARE\\DEVICEMAP\\SERIALCOMM")
fmt.Println(win.RegOpenKeyEx(win.HKEY_LOCAL_MACHINE, rootpath, 0, win.KEY_READ, &root))

var name_length uint32 = 72
var name *uint16
var key_type uint32
var lpData *byte
var lpDataLength uint32 = 72
var zero_uint uint32 = 0
fmt.Println(win.RegEnumValue(root, zero_uint, name, &name_length, nil, &key_type, lpData, &lpDataLength))


In this case, RegEnumValue always returns code 87, which MSDN's only explanation is "The parameter is incorrect."

Does anyone have any ideas that can point me in the right direction for this?

  • 写回答

2条回答 默认 最新

  • duan032225 2013-08-25 06:44

    A member of the Golang sub-reddit pointed out that I was not actually allocating any memory to the buffers passed in to RegEnumValue. As such, I've corrected the above example to the following:

    var name_length uint32 = 72
    var key_type uint32
    var lpDataLength uint32 = 72
    var zero_uint uint32 = 0
    name := make([]uint16, 72)
    lpData := make([]byte, 72)
    win.RegEnumValue(root, zero_uint, &name[0], &name_length, nil, &key_type, &lpData[0], &lpDataLength)

    Obviously, the "magic number" of 72 should probably be replaced with something else. There is another method called RegQueryInfoKey that can retrieve information about the registry key to allocate the correct number of bytes for the largest name and value in the key.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?



  • ¥15 matlab基于pde算法图像修复,为什么只能对示例图像有效
  • ¥100 连续两帧图像高速减法
  • ¥15 组策略中的计算机配置策略无法下发
  • ¥15 如何绘制动力学系统的相图
  • ¥15 对接wps接口实现获取元数据
  • ¥20 给自己本科IT专业毕业的妹m找个实习工作
  • ¥15 用友U8:向一个无法连接的网络尝试了一个套接字操作,如何解决?
  • ¥30 我的代码按理说完成了模型的搭建、训练、验证测试等工作(标签-网络|关键词-变化检测)
  • ¥50 mac mini外接显示器 画质字体模糊
  • ¥15 TLS1.2协议通信解密