An OSLog UI for iOS & iPadOS devices, Antoine allows you to view System Logs in real time, with the ability to filter logs by process, message, type, etc, as well additional stream options.

If you have used Console.app on macOS before, think of this as the iOS equivalent.

• Stream Logs
• Relatively nice UI
• Filter by a variety of ways, such as message, process, category, subsystem, and pid.
• View variety of information relating to a log, such as when it was made, it's type, etc
• Keep app streaming in the background (needs always-on location authorization)
• Export & import logs

Any iOS 13+ device that is jailbroken or uses TrollStore, basically any device where you can get arbitrary entitlements

Antoine works by using a private System framework, LoggingSupport.framework, a mixed C & Objective-C framework to stream system log messages, the application does the following:

• Create a os_activity_stream_block_t closure that handles incoming messages, the closure provides 2 arguments (an os_activity_stream_entry_t entry, and an error code number as an int), the closure calls a delegate method to tell the user of the class that a new message was recieved
• Create a os_activity_stream_event_block_t closure that handles when new major events (not messages) occur in the stream (such as when the stream starts, stops, fails, etc), this closure calls a delegate method that is used to update the application UI
• Create the activity stream with os_activity_stream_for_pid, the the os_activity_stream_for_pid takes in 3 arguments: the pid of the process, since we want logs of all processes, we pass in -1, the second argument is a set of stream flags to pass in, see os_activity_stream_flag_t in ActivityStream.h, the third argument is the os_activity_stream_block_t we created earlier
• Call os_activity_stream_set_event_handler on the activity stream & the block handler, to be notified of when new events occur
• Call os_activity_stream_resume to start the activity stream.

After we set up the activity stream to start, we update the UI, a view controller containing a UICollectionView.

Whenever we want to pause the activity stream, we call os_activity_stream_cancel on the activity stream.

• Background Mode currently works by pinging location, should migrate this to instead play a quiet Audio sound
• Stream View Controller should be made to look prettier

• Antoine: Developer, creator of app
• saagarjha: Help with using os_log_* functions
• Flower: Icon designer