Trying to understand a permissions failure when writing to ~/Desktop
Trying to understand a permissions failure when writing to ~/Desktop
- Subject: Trying to understand a permissions failure when writing to ~/Desktop
- From: Graham Cox <email@hidden>
- Date: Thu, 28 Jan 2016 12:42:20 +1100
I use -[NSData writeToURL:options:error] to write data to files in a location generally chosen by the user. That works fine.
The default location is ~/Desktop, if the user fails to choose anything, or if the bookmark of the previously chosen location fails to resolve. However, when I try to write the file I get an error 513, ‘you don’t have permission’, underlying error 1, operation not permitted’. If the user chooses the Desktop themselves using the Open panel, it works fine.
The ~/Desktop permissions seem to be OK - I have readwrite permission on that folder.
So something is weird about the URL for ~/Desktop when I create it programatically as opposed to what NSOpenPanel returns. Note this isn’t a sandboxed app, so that shouldn’t come into it.
I create the default URL thusly:
NSURL* desktopURL = [[NSFileManager defaultManager] URLForDirectory:NSDesktopDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:YES error:&error];
I can’t see any obvious difference between the URL here and the one I get from NSOpenPanel, but there must be one.
Any ideas what the problem could be here?
—Graham
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