Unable to create File on Xamarin.iOS

[prin53]

I have this error when running FileSink on iOS device (simulator works fine):

Caught exception while emitting to sink Serilog.Sinks.File.RollingFileSink: System.UnauthorizedAccessException: Access to the path '/private/var/containers/Bundle/Application/ADEC88A7-24D1-4BB1-B680-55CAC821ECA7/App.iOS.app/file:/var/mobile/Containers/Data/Application/831F4448-5AA3-45F7-92A7-DEF85132C3BC/Documents/Logs' is denied. ---> System.IO.IOException: Operation not permitted
--- End of inner exception stack trace ---
at System.IO.FileSystem.CreateDirectory (System.String fullPath) [0x00192] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/external/corefx/src/System.IO.FileSystem/src/System/IO/FileSystem.Unix.cs:319
at System.IO.Directory.CreateDirectory (System.String path) [0x0002c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/external/corefx/src/System.IO.FileSystem/src/System/IO/Directory.cs:40
at Serilog.Sinks.File.FileSink..ctor (System.String path, Serilog.Formatting.ITextFormatter textFormatter, System.Nullable1[T] fileSizeLimitBytes, System.Text.Encoding encoding, System.Boolean buffered, Serilog.Sinks.File.FileLifecycleHooks hooks) [0x00088] in C:\projects\serilog-sinks-file\src\Serilog.Sinks.File\Sinks\File\FileSink.cs:72 at Serilog.Sinks.File.RollingFileSink.OpenFile (System.DateTime now, System.Nullable1[T] minSequence) [0x00133] in C:\projects\serilog-sinks-file\src\Serilog.Sinks.File\Sinks\File\RollingFileSink.cs:149
at Serilog.Sinks.File.RollingFileSink.AlignCurrentFileTo (System.DateTime now, System.Boolean nextSequence) [0x0000d] in C:\projects\serilog-sinks-file\src\Serilog.Sinks.File\Sinks\File\RollingFileSink.cs:92
at Serilog.Sinks.File.RollingFileSink.Emit (Serilog.Events.LogEvent logEvent) [0x00038] in C:\projects\serilog-sinks-file\src\Serilog.Sinks.File\Sinks\File\RollingFileSink.cs:79
at Serilog.Core.Sinks.SafeAggregateSink.Emit (Serilog.Events.LogEvent logEvent) [0x0000f] in :0

This happens because of Path.GetFullPath method call in the PathRoller.

Expected and valid path: file:/var/mobile/Containers/Data/Application/831F4448-5AA3-45F7-92A7-DEF85132C3BC/Documents/Logs
Actual path: /private/var/containers/Bundle/Application/ADEC88A7-24D1-4BB1-B680-55CAC821ECA7/App.iOS.app/file:/var/mobile/Containers/Data/Application/831F4448-5AA3-45F7-92A7-DEF85132C3BC/Documents/Logs

[nblumhardt]

No idea how to tackle this, sorry - open to ideas, but seems like a Xamarin bug, perhaps?

[prin53]

Is it possible to let users provide the full path themselves? This should fix the problem and also allow the provided path to be used to get logs without hidden manipulation. What do you think?

[prin53]

Looks like it works now.