使用 IOKit 获取 IODeviceTree 路径

发布于 2024-09-30 13:00:36 字数 745 浏览 4 评论 0原文

我正在尝试使用 IOKit 框架获取设备的 IODeviceTree 路径。我可以使用以下代码获取设备的 IOService 路径 (IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@B/AppleMCP79AHCI)：

CFMutableDictionaryRef matchingDict = NULL;
matchingDict = IOServiceMatching("AppleMCP79AHCI");
io_service_t sataService;
io_string_t path;
sataService = IOServiceGetMatchingService(kIOMasterPortDefault, matchingDict);
IORegistryEntryGetPath(sataService, kIOServicePlane, path);
NSLog(@"%s", path);

但是，我需要获取IODeviceTree 平面中的设备。在IODeviceTree平面中，路径类似于IODeviceTree:/PCI0@0/SATA@B。我尝试简单地将 kIOServicePlane 替换为 kIODeviceTreePlane 但它什么也没返回。我没有使用 IOKit 的经验，所以我很确定我在这里做了一些明显的事情。

谢谢

原文

I'm trying to get the IODeviceTree path of a device using the IOKit framework. I'm able to get the IOService path (IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@B/AppleMCP79AHCI) of the device using this code:

CFMutableDictionaryRef matchingDict = NULL;
matchingDict = IOServiceMatching("AppleMCP79AHCI");
io_service_t sataService;
io_string_t path;
sataService = IOServiceGetMatchingService(kIOMasterPortDefault, matchingDict);
IORegistryEntryGetPath(sataService, kIOServicePlane, path);
NSLog(@"%s", path);

However, I need to get the path for the device in the IODeviceTree plane. In the IODeviceTree plane, the path would be something like IODeviceTree:/PCI0@0/SATA@B. I tried simply replacing kIOServicePlane with kIODeviceTreePlane but it returned nothing. I have no experience with IOKit, so I'm pretty sure theres something obvious I'm doing here.

Thanks

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