Get reliability permissions Vi - Windows 7

Sometimes I wrong results to get permissions VI on Windows 7

VI reports I have not the right to write to a folder, but I can't.

For example, I "101101101" for C:\Users, but I can't.

Why is it?

Is this because as a user, I can not write in C:\Users, but as a member of the Administrators group, can I?

As says help "using the permissions setting is very limited on non-Linux operating systems.

but it could get completely useless Vi on Windows permissions.

Marco

Windows has two different systems that control access to the files. The first is a simple Boolean attribute that specifies whether a file is protected or not writable. It is a relic of BACK and which is essentially permission them. The second is the base ACL security system which introduced Windows NT (borrowed heavily from the DEC OS). This is where your administrator accounts and administrator etc come into play. Get the permissions of files does basically nothing with this information because it is rather difficult to interface from an application user and notorously bad documented.

Windows itself is not always consistent in how it treats these two things. Explorer itself makes all sorts of tricks involved to bypass these obstacles but fails sometimes short too. At the time LabVIEW was brought from the Mac on Windows and Unix, the write protection indicator was all Windows supported. Access Unix system right was simple but supports a particle size fine enough separation between users, groups, and everyone to read, write, execute flags for each of these groups. On Mac, it was just a little more complicated than on Windows, but not as full featured as Unix. Thus, the permissions of the file Get was modeled around the Unix system that allowed most of the features and others have been adapted to keep his friends, who for Windows simply meant that everything what to write protection of files was not available.

The more recent NT based access control system does not at all fit in this interface and trying to shoehorn this in the node to get the permissions of files is just not a feasible option. And changing into a much more complicated node which can manage all the features of NT security did not apparently come as a priority so far. Add to that, that such an interface is difficult to understand for most of LabVIEW users as even system administrators struggling with him and you can see why there has not been much effort on this until now.

You could say it's a bug, but then the bug is in the GetFileAttributes() API Windows function that does take itself really into account control lists of a file to the current user in the determination of the protection status of writing a file.

Tags: NI Software

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