System.UnauthorizedAccessException: 'Access to the path is denied.' When Create Publisher #6

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1. fabalo76 commented on Jun 3, 2021

   

   fabalo76

   on Jun 3, 2021

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   @cbfrank . Same problem here, when running the Main application as Windows Service under LocalSystem Account. The other apps running under a normal account can't access the Queue Semaphore with Access denied error.
   I made a patch to Cloudtoid.Interprocess package to make the Named Semaphore accessible to Everyone..
   Check the solution here
   https://github.com/fabalo76/interprocess/tree/WinSemaphoreACLs

   As this is an unofficial branch (pending to merge with official branch) and only tested in Windows ,you have to install the package manually in your visual studio.
   You could compile it by yourself or try my binary package
   Cloudtoid.Interprocess.1.0.156.zip

   Check the source code for Semaphore/Windows/SemaphoreWindows.cs
   
2. cocowalla commented on Jun 3, 2021

   

   cocowalla

   on Jun 3, 2021

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   @fabalo76 I'm not sure giving the Everyone account full control is the best idea from a security perspective. Ideally, you'd be able to configure it, so you can grant the required access rights only for the actual accounts at either end of the pipe.
3. prezaei commented on Jul 11, 2021

   

   prezaei

   on Jul 11, 2021

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   Hey folks, any suggestions on the best way to provide a solution here? I'd be happy to implement it.
4. prezaei

   self-assigned this

   on Nov 19, 2022
5. prezaei

   added

   enhancementNew feature or requestNew feature or request

   help wantedExtra attention is neededExtra attention is needed

   on Nov 19, 2022
6. MacKey-255 commented on Aug 14, 2025

   

   MacKey-255

   on Aug 14, 2025

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   Any update? I have the same problem in Linux with semaphore and MemoryFile permissions. Errors:

   MemoryFile

   System.UnauthorizedAccessException: Access to the path '/tmp/.cloudtoid/interprocess/mmf/test.qu' is denied.
    ---> System.IO.IOException: Permission denied
      --- End of inner exception stack trace ---
      at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
      at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
      at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
      at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
      at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize)
      at Cloudtoid.Interprocess.Memory.Unix.MemoryFileUnix..ctor(QueueOptions options, ILoggerFactory loggerFactory)
      at Cloudtoid.Interprocess.MemoryView..ctor(QueueOptions options, ILoggerFactory loggerFactory)
      at Cloudtoid.Interprocess.Queue..ctor(QueueOptions options, ILoggerFactory loggerFactory)
      at Cloudtoid.Interprocess.Subscriber..ctor(QueueOptions options, ILoggerFactory loggerFactory)
      at Cloudtoid.Interprocess.QueueFactory.CreateSubscriber(QueueOptions options)
   

   Semaphore

   Cloudtoid.Interprocess.Semaphore.Posix.PosixSemaphoreUnauthorizedAccessException: The semaphore exists, but the caller does not have permission to open it.
      at Cloudtoid.Interprocess.Semaphore.Linux.Interop.CreateOrOpenSemaphore(String name, UInt32 initialCount)
      at Cloudtoid.Interprocess.Semaphore.Linux.SemaphoreLinux..ctor(String name, Boolean deleteOnDispose)
      at Cloudtoid.Interprocess.InterprocessSemaphore.CreateReleaser(String name)
      at Cloudtoid.Interprocess.Publisher..ctor(QueueOptions options, ILoggerFactory loggerFactory)
      at Cloudtoid.Interprocess.QueueFactory.CreatePublisher(QueueOptions options)
   

   To reproduce

   First create a subscriber in a program with root (Uid: 0) and a publisher like user (Uid; 1000). The MemoryFile and base folder set the permissions by default, the same in case of semaphore

   Solution

   Set permissions to base folder when I create a subscriber from root but I cannot have control of the semaphore :/ so the Semaphore problem is still happend. I going to try create a pull request with a permission options to fix it