How to get serial number from Mac hard disks?

cocoa, macos

Solution

I'm not sure if "AppleUSBEHCI" is the proper thing to look for but you can retrieve this sort of data using the IOKit framework:

#include <IOKit/IOKitLib.h>
#include <Cocoa/Cocoa.h>

kern_return_t   kr;
io_iterator_t   io_objects;
io_service_t    io_service;

kr = IOServiceGetMatchingServices(kIOMasterPortDefault,
            IOServiceNameMatching("AppleUSBEHCI"), &io_objects);

if(kr != KERN_SUCCESS)
    exit(1);

while((io_service= IOIteratorNext(io_objects)))
{
    kr = IORegistryEntryCreateCFProperties(io_service, &service_properties, kCFAllocatorDefault, kNilOptions);
    if(kr == KERN_SUCCESS)
    {
        NSDictionary * m = (NSDictionary *)service_properties;
        NSLog(@"%@", m);
        CFRelease(service_properties);
    }

    io_iterator_t   iter;
    //handle kr error
    kr = IORegistryEntryGetChildIterator(io_service, kIOServicePlane, &iter);

    io_registry_entry_t     child;
    while( (child = IOIteratorNext( iter )))
    {
        kr = IORegistryEntryCreateCFProperties(child, &child_props,  kCFAllocatorDefault, kNilOptions );
        NSLog(@"Child props: %@", child_props);
        //release child_props
    }

    IOObjectRelease(io_service);
}

IOObjectRelease(io_objects);

Problem

Is there an easy way to get the serial number of all the hard disks in a Mac using an API? Basically, I'm looking for a unique identifier for the hard disk with which I can figure out whether the hard disk has been used (or referred to) by my application or not. Please let me know if there is any other solution. Note: I need this solution for 10.4 and above.

Original source