c – 如何创建程序列出Mac中的所有USB设备？

或者，您可以使用IOServiceGetMatchingServices获取所有当前匹配服务的迭代器，使用由IOserviceMatching(kIoUSBDeviceClassName)创建的字典。

以下是一个简短的示例(我从未运行过)：

#include <IOKit/IOKitLib.h>
#include <IOKit/usb/IoUSBLib.h>

int main(int argc,const char *argv[])
{
    CFMutableDictionaryRef matchingDict;
    io_iterator_t iter;
    kern_return_t kr;
    io_service_t device;

    /* set up a matching Dictionary for the class */
    matchingDict = IOserviceMatching(kIoUSBDeviceClassName);
    if (matchingDict == NULL)
    {
        return -1; // fail
    }

    /* Now we have a Dictionary,get an iterator.*/
    kr = IOserviceGetMatchingservices(kIOMasterPortDefault,matchingDict,&iter);
    if (kr != KERN_succesS)
    {
        return -1;
    }

    /* iterate */
    while ((device = IOIteratorNext(iter)))
    {
        /* do something with device,eg. check properties */
        /* ... */
        /* And free the reference taken before conTinuing to the next item */
        IOObjectRelease(devicE);
    }

   /* Done,release the iterator */
   IOObjectRelease(iter);
   return 0;
}