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...the problem arises when GetFileSecurityW is called on shared files under certain circumstances. One situation I've seen it in are when a file is shared from a non-Windows host (e.g. Linux), which is similar to the situation documented at https://social.msdn.microsoft.com/Forums/sqlserver/en-US/f57928d3-d89b-426d-a174-d06d97355afc/how-to-check-if-a-filefolder-is-writable-or-not?forum=windowssdk . The other situation arises when a file is cached offline by Windows Offline files feature. The call to GetFileSecurityW works fine when the network is up (and so the file is being accessed from the share...

Dear Tomas, Thanks for your email. This can be easily reproduced if there is access to a shared folder. I've reproduced this behaviour on both Windows 7 and Windows 10. Steps to reproduce: 1. Ensure Offline Files is turned on within Windows 2. Using Windows Explorer, browse to a folder shared on a network using a UNC path, e.g. \\mypc\myshare\ 3. Create a test file, e.g. test.txt 4. Within

...GetFileSecurityW is > called on shared files under certain circumstances. > > One situation I've seen it in are when a file is shared from a non-Windows > host (e.g. Linux), which is similar to the situation documented at > https://social.msdn.microsoft.com/Forums/sqlserver/en-US/f57928d3-d89b-426d-a174-d06d97355afc/how-to-check-if-a-filefolder-is-writable-or-not?forum=windowssdk > . > > The other situation arises when a file is cached offline by Windows Offline > files feature. The call to GetFileSecurityW works fine when the network is > up (and so the file is being...