Cannot get incremental logs from OSLogStore

Hello folks,

I would like to incrementally retrieve logs of my iOS App from the Unified Logging System using OSLogStore.

1. First I initialize the store

• store = try OSLogStore(scope: .currentProcessIdentifier)

1. Second I set a position from which I want the logs using either :

• position = store.position(timeIntervalSinceLatestBoot: 0) // to get the logs from the launch of the App
• position = store.position(date: Date().addingTimeInterval(-10)) // to get the logs of the last 10 seconds

1. Third I get the entries in the store from the position

• store.getEntries(at: position)

Issue

Whatever the position I set using from OSLogStore:

• position(timeIntervalSinceLatestBoot:)
• position(date:)
• position(timeIntervalSinceEnd:)

All the logs are retrieved. I cannot get only the subset requested by the timeframe I specified

Sample

A sample LogScreen that has 2 buttons is attached to the post

• 1 to fetch logs since the last time they have been fetched
• 1 to add a log

The code has been simplified to ease the comprehension of the case, please be indulgent to the shortcuts that have been taken.

References

https://developer.apple.com/documentation/oslog/oslogstore https://developer.apple.com/forums/thread/705868 https://developer.apple.com/videos/play/wwdc2023/10226/

Environment

XCode 15b7 iPhone 14 Pro / iOS 17