API to list all connected devices?

Question

I want to list all connected devices programatically.Basically,what i am trying to do is to check how many devices are connected at USB port and PS2 port.

Answer 1

You can use SetupDiEnumDeviceInterfaces and SetupDiGetDeviceInterfaceDetail (http://msdn.microsoft.com/en-us/library/windows/hardware/ff551120%28v=vs.85%29.aspx) to get the details on windows.

Here's a sample code: https://gist.github.com/rakesh-gopal/9ac217aa218e32372eb4

SetupDiEnumDeviceInterfaces(hDevInfo, NULL, &GUID_DEVINTERFACE_USB_DEVICE,dwMemberIdx,  DevIntfData);
SetupDiGetDeviceInterfaceDetail(hDevInfo, &DevIntfData, NULL, 0, &dwSize, NULL); 

The idea is to repeatedly call SetupDiEnumDeviceInterfaces to get all the connected devices and then call SetupDiGetDeviceInterfaceDetail to get more details about the connected device.

You can also use the libusb to get an output similar to lsusb on unix-like systems. Remember to compile with -lusb flag on.

Here's code using libusb: https://gist.github.com/rakesh-gopal/12d4094e2b882b44cb1d

#include <stdio.h>
#include <usb.h>
main(){
    struct usb_bus *bus;
    struct usb_device *dev;
    usb_init();
    usb_find_busses();
    usb_find_devices();
    for (bus = usb_busses; bus; bus = bus->next)
        for (dev = bus->devices; dev; dev = dev->next){
            printf("Trying device %s/%s\n", bus->dirname, dev->filename);
            printf("\tID_VENDOR = 0x%04x\n", dev->descriptor.idVendor);
            printf("\tID_PRODUCT = 0x%04x\n", dev->descriptor.idProduct);
        }
}