Example program for retrieving active URLs from Safari webkit processes.

gistfile1.m

#import <Foundation/Foundation.h>

// Useful references:
// -[SMProcess webKitActiveURLs] implementation used in Activity Monitor on 10.9 (search for it using Hopper)
// http://opensource.apple.com/source/WebKit2/WebKit2-7537.71/WebProcess/mac/WebProcessMac.mm
// https://github.com/rodionovd/RDProcess/blob/master/RDProcess.m

const CFStringRef kLSActivePageUserVisibleOriginsKey = CFSTR("LSActivePageUserVisibleOriginsKey");
const int kLSMagicConstant = -1;

extern CFTypeRef _LSCopyApplicationInformationItem(int /* hopefully */, CFTypeRef, CFStringRef);
extern CFTypeRef _LSASNCreateWithPid(CFAllocatorRef, pid_t);

// Returns an array of active URLs (as strings) from a safari webkit process identifier, or nil on failure
// Need to be running as root for this to work
static NSArray *webKitActiveURLs(pid_t webKitProcessIdentifier)
{
	NSArray *urlStrings = nil;
	CFTypeRef asn = _LSASNCreateWithPid(kCFAllocatorDefault, webKitProcessIdentifier);
	
	if (asn != NULL)
	{
		id information = CFBridgingRelease(_LSCopyApplicationInformationItem(kLSMagicConstant, asn, kLSActivePageUserVisibleOriginsKey));
		
		// since Activity Monitor's -[SMProcess webKitActiveURLs] does a type check, we may as well too
		if ([information isKindOfClass:[NSString class]])
		{
			urlStrings = @[information];
		}
		else if ([information isKindOfClass:[NSArray class]])
		{
			urlStrings = information;
		}
		
		CFRelease(asn);
	}
	
	return urlStrings;
}

int main(int argc, const char * argv[])
{
	@autoreleasepool
	{
		if (argc != 2)
		{
			printf("Supply a process identifier for a \"Safari Web Content\" process\n");
			exit(1);
		}
		
		pid_t processIdentifier = atoi(argv[1]);
		
		NSArray *webKitURLs = webKitActiveURLs(processIdentifier);
		if (webKitURLs == nil)
		{
			printf("Active URLs retrieval failed. Is %d a valid identifier, and are you running as root?\n", processIdentifier);
			exit(2);
		}
		
		for (NSString *webKitURL in webKitURLs)
		{
			printf("%s\n", [webKitURL UTF8String]);
		}
	}
	return 0;
}