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DARegisterDiskMountApprovalCallback() behavior

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DARegisterDiskMountApprovalCallback() behavior

Subject: DARegisterDiskMountApprovalCallback() behavior
From: websrvr <email@hidden>
Date: Fri, 14 May 2010 08:53:32 -0400
Mta-interface: amavisd-new-2.3.3 (2005-08-22) + Maia Mailguard 1.0.1 at daleenterprise.com

Example code:

#import <Foundation/Foundation.h>
#import <DiskArbitration/DiskArbitration.h>

DADissenterRef
DiskApproved(DADiskRef disk, void *context)
{
	char const *CdiskName = DADiskGetBSDName(disk);
	DADissenterRef dissenter;
	char *type;
	NSString *diskName = [NSString stringWithUTF8String:CdiskName];
	NSRange s1s1NumberRange = NSMakeRange([diskName length] - 4, 4);

if([[diskName substringWithRange:s1s1NumberRange] isEqualToString:@"s3s1"]) /* check for our magic partition */ { CFStringRef arguments[] = { CFStringCreateWithCString(kCFAllocatorDefault, "nobrowse", kCFStringEncodingUTF8), CFStringCreateWithCString(kCFAllocatorDefault, "owners", kCFStringEncodingUTF8), CFStringCreateWithCString(kCFAllocatorDefault, "suid", kCFStringEncodingUTF8), NULL };

		DADiskMountWithArguments(disk,
								NULL,
								kDADiskMountOptionDefault,
								NULL,
								NULL,
								arguments);

		/* deny the mount since we already mounted it */
		dissenter = DADissenterCreate(kCFAllocatorDefault,
									kDAReturnNotPermitted,
									CFSTR("mounted hidden"));

		type = "we will mounted";
	}
	else
	{
		/* allow normal mounting */
		dissenter = NULL;

		type = "system will mount";
	}

	printf("%s: %s\n", CdiskName, type);

	return dissenter;
}

int main (int argc, const char * argv[]) { NSAutoreleasePool *pool = [NSAutoreleasePool new]; DAApprovalSessionRef session = DAApprovalSessionCreate (kCFAllocatorDefault);

	if (!session)
	{
		fprintf(stderr, "failed to create Disk Arbitration session");
		goto out;
	}

	DARegisterDiskMountApprovalCallback(session,
										NULL,  // matches all disk objects
										DiskApproved,
										NULL); // context

	DAApprovalSessionScheduleWithRunLoop(session,
										 CFRunLoopGetCurrent(),
										 kCFRunLoopDefaultMode);

	CFRunLoopRunInMode(kCFRunLoopDefaultMode,
						60 /* seconds */,
						false);

	DAApprovalSessionUnscheduleFromRunLoop(session,
										 CFRunLoopGetCurrent(),
										 kCFRunLoopDefaultMode);

	DAUnregisterApprovalCallback(session,
								DiskApproved,
								NULL);

out:
   if (session)
		CFRelease(session);

    [pool release];

	return 0;
}

________________________________________________________________________ _______________________

The example appears to work but I'm noticing the call to DADiskMountWithArguments() from the callback function seems to trigger the approval process for the same partition.

I've look at suggested solution to my mount issue and a manual solution is not acceptable or the use of the fstab file because it cannot be guaranteed that it exists or that the content will be correct.

It has been suggested that example code does exist however no one has point me to or provided me with any sample code that shows usage of these functions.

Also, it seems that calling DADiskMount() or DADiskMountWithArguments () from within my callback function seem to trigger the approval process again _______________________________________________ Do not post admin requests to the list. They will be ignored. Filesystem-dev mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: This email sent to email@hidden Prev by Date: Re: auto mounting a partition with nobrowse Next by Date: mount information from DA framework. Previous by thread: Any updated information to "FileID race detected" email thread? Next by thread: mount information from DA framework. Index(es): Date Thread