I was looking at the main window of Mac OSX Disk Utility and I found four informations about USB devices (when a drive item is selected):
- Disk Description
- Connection Bus
- Connection Type
- USB Serial Number
I was able to get the first three information using Disk Arbitration framework. I got them registering a callback routine in response to new disk device detection:
DARegisterDiskAppearedCallback(session, NULL, OnDiskAppeared, (void *)NULL);
The routine looked like this:
static void OnDiskAppeared(DADiskRef disk, void *__attribute__((__unused__)) ctx) {
CFDictionaryRef dict = DADiskCopyDescription(disk);
const void *DAMediaName = CFSTR("DAMediaName");
const void *DAVolumeName = CFSTR("DAVolumeName");
const void *DADeviceModel = CFSTR("DADeviceModel");
const void *DAMediaUUID = CFSTR("DAMediaUUID");
const void *DAVolumeUUID = CFSTR("DAVolumeUUID");
printf("DAMediaName: ");
CFShow(CFDictionaryGetValue(dict, DAMediaName));
printf("DAVolumeName: ");
CFShow(CFDictionaryGetValue(dict, DAVolumeName));
printf("DADeviceModel: ");
CFShow(CFDictionaryGetValue(dict, DADeviceModel));
printf("DAMediaUUID: ");
CFShow(CFDictionaryGetValue(dict, DAMediaUUID));
printf("DAVolumeUUID: ");
CFShow(CFDictionaryGetValue(dict, DAVolumeUUID));
CFRelease(dict);}
The routine actually returned me informations about volumes and phisical drives and, in the last case, returned me the informations about the three disk properties I was talking about before.
Unfortunately I couldn't find anything about the fourth (USB Serial Number).
I printed the whole dictionary by calling:
CFDictionaryApplyFunction(dict, printKeys, NULL);
having coded the printKeys callback routine like this:
static void printKeys (const void* key, const void* value, void* context) {
CFShow(key);
CFShow(value);}
but no key returned me the desired fourth value.
I guess somewhere, maybe in the Disk Arbitration framework, there had to be something to provide such information but I can't figure out where.
Some advice?
Thanks for help.
Antonio
