![]() Crashes or other improper ejecting of drives can sometimes cause the system to leave the drive's mount point in the hidden /Volumes directory, and then when you attach the drive again the system recognizes an existing mount point of the same name and will append a number to the new mount point. When you eject a drive, the system should remove the mount point for the drive however, sometimes this doesn't happen. While the numbered names for disks should only happen if there are multiple drives attached with the same name, it can happen for other reasons as well. If by chance you mount two drives of the same name, because the system can't create two mount points with the same name it appends sequential numbers to new mount points as they are created, and therefore you will see the numbered drive names in the Finder. In this directory a folder is created and given the drive's name, and is used as the access point for all files on that local filesystem. Also, you want to keep a reference to the session object so that you can unschedule and release it when you no longer need it (which would be sometime after you no longer need to get callbacks from it).The mount point for local drives is in the /Volumes folder, which is a hidden directory on the main boot drive. That means that you don't want to create a new session object for every attempt to unmount a disk. You use either DASessionScheduleWithRunLoop() or DASessionSetDispatchQueue(), as described in Disk Arbitration Programming Guide: Using Disk Arbitration Notification and Approval Callbacks – Scheduling the Session with the Run Loop or Dispatch Queue. You need to schedule the session object on a run loop or dispatch queue. The session object is responsible for managing this waiting and calling. The mechanism by which a program waits for that event and calls your callback in response is either a run loop or a dispatch queue. Your callback will be called at that time. If it succeeds, it may happen at some later time. The disk has not necessarily been unmounted by the time the function returns to your code. ĭASessionUnscheduleFromRunLoop(_session, getCFRunLoop], kCFRunLoopDefaultMode) ĭADiskUnmount() operates asynchronously. (void)umnountDrivePath:(NSString *)voulumePathĭADiskRef disk = DADiskCreateFromVolumePath(kCFAllocatorDefault, ssion, path) ĭADiskUnmount(disk, kDADiskUnmountOptionDefault, unmount_done, (_bridge void *)(self)) ĭriverUtilitiesController *driverUtilitiesController = (_bridge DriverUtilitiesController *)context ssion = DASessionCreate(kCFAllocatorDefault) ĭASessionScheduleWithRunLoop(_session, getCFRunLoop], kCFRunLoopDefaultMode) Thanks to Ken Thomases the code now works - (id)init Void (void)umnountDrivePath:(NSString *)voulumePathĭASessionRef session = DASessionCreate(kCFAllocatorDefault) ĬFURLRef path = CFURLCreateWithString(NULL, (_bridge CFStringRef)voulumePath, NULL) ĭADiskRef disk = DADiskCreateFromVolumePath(kCFAllocatorDefault, session, path) ĭADiskUnmount(disk, kDADiskUnmountOptionDefault, unmount_done, NULL) ![]() Could someone give me a help? DriverUtilitiesController() I read the DiskArbitrationProgGuide and followed the steps, but no progress yet. The code works fine, but the callback is not called when the disk is unmounted successful only when it gives an error. ![]()
0 Comments
Leave a Reply. |