检测 osx 上卷的出现/消失

发布于 2024-07-07 06:37:15 字数 174 浏览 5 评论 0原文

我想在用户插入 USB 密钥、添加外部磁盘和安装磁盘映像时更新存储设备列表。 IOKit 的 IOServiceAddInterestNotification 看起来像是可行的方法，但在 kIOMediaClass 中注册一般兴趣的明显用途只是为您提供卸载卷的通知，而且只是有时而已。

这样做的正确方法是什么？

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奢欲 2024-07-14 06:37:15

DiskArbitration.h 中的以下调用完全符合我的要求：

DARegisterDiskAppearedCallback
DARegisterDiskDisappearedCallback
DARegisterDiskDescriptionChangedCallback

这些涵盖插入、删除（甚至是不可安装的卷）
元数据更改事件。

PS 不要忘记将您的 DASession 添加到运行循环
否则您将不会收到任何回调。

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心奴独伤 2024-07-14 06:37:15

我想在用户插入 USB 密钥、添加外部磁盘和安装磁盘映像时更新存储设备列表。

我可以用这段代码为您提供三分之二，我想不需要做更多的工作即可为您提供第三个。

File:               USBNotificationExample.c

Description:        This sample demonstrates how to use IOKitLib and IOUSBLib to set up asynchronous
                    callbacks when a USB device is attached to or removed from the system.
                    It also shows how to associate arbitrary data with each device instance.

http://opensource .apple.com/source/IOUSBFamily/IOUSBFamily-385.4.1/Examples/Another%20USB%20Notification%20Example/USBNotificationExample.c

我个人使用了很长时间（此代码的稍微修改的副本），监控 USB HDD 的连接。

正如您从这个小示例中看到的，它可以轻松地证明适用于监视已安装的驱动器。或者也可能不会。 YMMV。

    matchingDict = IOServiceMatching(kIOUSBDeviceClassName);        // Interested in instances of class
                                                                    // IOUSBDevice and its subclasses

以及何时匹配

void DeviceAdded(void *refCon, io_iterator_t iterator)
{
    kern_return_t           kr;
    io_service_t            usbDevice;
    IOCFPlugInInterface     **plugInInterface=NULL;
    SInt32                  score;
    HRESULT                 res;    

    while ( (usbDevice = IOIteratorNext(iterator)) )
    {
        io_name_t                   deviceName;
        CFStringRef                 deviceNameAsCFString;
        MyPrivateData               *privateDataRef = NULL;
        UInt32                      locationID;

        printf("Device 0x%08x added.\n", usbDevice);

等等。

I want to update a list of storage devices as the user inserts USB keys, adds external disks and mounts disk images.

I can get you two out of three with this piece of code, which I imagine wouldn't require a lot more work to give you the third.

File:               USBNotificationExample.c

Description:        This sample demonstrates how to use IOKitLib and IOUSBLib to set up asynchronous
                    callbacks when a USB device is attached to or removed from the system.
                    It also shows how to associate arbitrary data with each device instance.

http://opensource.apple.com/source/IOUSBFamily/IOUSBFamily-385.4.1/Examples/Another%20USB%20Notification%20Example/USBNotificationExample.c

I've personally used (a slightly modified copy of this code) for a long time, to monitor the connection of USB HDDs.

As you can see from this small sample, it may easily prove adaptable to monitor mounted drives. Or it may not. YMMV.

    matchingDict = IOServiceMatching(kIOUSBDeviceClassName);        // Interested in instances of class
                                                                    // IOUSBDevice and its subclasses

and when it matches

void DeviceAdded(void *refCon, io_iterator_t iterator)
{
    kern_return_t           kr;
    io_service_t            usbDevice;
    IOCFPlugInInterface     **plugInInterface=NULL;
    SInt32                  score;
    HRESULT                 res;    

    while ( (usbDevice = IOIteratorNext(iterator)) )
    {
        io_name_t                   deviceName;
        CFStringRef                 deviceNameAsCFString;
        MyPrivateData               *privateDataRef = NULL;
        UInt32                      locationID;

        printf("Device 0x%08x added.\n", usbDevice);

and so forth, and so on.

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