Quicksand boxed – a tale of woe.

[Joel Norvell]

Hi Cocoa-dev People,

I have a sandboxing question, below. I'm wondering if it's even possible to do what I tried to do, and if so, how?

Thanks,
Joel Norvell


I'm trying to iterate directories in a sandboxed app in order to find a file with a specific extension.

I believe I have all the entitlements that are available that might help:

App Sandbox
com.apple.security.files.downloads.read-write
com.apple.security.files.user-selected.read-write
com.apple.security.print
com.apple.security.temporary-exception.files.home-relative-path.read-write
com.apple.security.temporary-exception.files.absolute-path.read-write

I need to be able to find a file, by name, that could either be on the Desktop or in the (real) Documents folder. I don't even get close. I get a filecoordinationd when I try to iterate either of them (code below). I am able to find a file, by name, in the Downloads folder, though.

Has anyone been able to do this with the Desktop folder or the (real) Documents folder? (When I used NSDocumentDirectory it looked in the Documents folder attached to my container. I could find things that were in that. But it wasn't the same as the Documents folder that the user sees.)

If I turn off Sandboxing I have no problem iterating Desktop or Documents.

This is the code I used to test iterating in three NSSearchPathDirectories: NSDocumentDirectory, NSDesktopDirectory, and NSDownloadsDirectory.

NSFileManager* fm = [NSFileManager new];
NSError* err = nil;
NSURL* rootDirURL =
[fm URLForDirectory:NSDesktopDirectory
inDomain:NSUserDomainMask appropriateForURL:nil
create:NO error:&err];
// error-checking omitted

NSURL * theFormsFolderURL = [self formsFolderURL:rootDirURL];

- (NSURL *) formsFolderURL:(NSURL *)rootDirURL
{
NSFileManager * fm = [NSFileManager defaultManager];

NSDirectoryEnumerator* dir = [fm enumeratorAtURL:rootDirURL
includingPropertiesForKeys:nil
options:0 errorHandler:nil];

for (NSURL* f in dir)
{
if ([[f pathExtension] isEqualToString:@"pdq"])
{
NSLog(@"%@", [f lastPathComponent]);
}
}

return nil; // Dummy nil
}

BTW, this was the value that gave me a filecoordinationd for Desktop:
rootDirURL NSURL * @"file:///Users/joely/Library/Containers/biz.pdqforms.pdqforms/Data/Desktop/"
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[Glenn L. Austin]

When you're application is sandboxed, it has access to documents within the sandbox -- period.

If you display an open dialog, you can ask the user for a file/folder (and by inference, permission to access that file/folder).

There used to be a way to denote a specific file/files to be able to access, but I don't recall if that's been turned off or not.
--
Glenn L. Austin, Computer Wizard, AustinSoft.com

Post by Joel Norvell
Hi Cocoa-dev People,
I have a sandboxing question, below. I'm wondering if it's even possible to do what I tried to do, and if so, how?
Thanks,
Joel Norvell
I'm trying to iterate directories in a sandboxed app in order to find a file with a specific extension.
App Sandbox
com.apple.security.files.downloads.read-write
com.apple.security.files.user-selected.read-write
com.apple.security.print
com.apple.security.temporary-exception.files.home-relative-path.read-write
com.apple.security.temporary-exception.files.absolute-path.read-write
I need to be able to find a file, by name, that could either be on the Desktop or in the (real) Documents folder. I don't even get close. I get a filecoordinationd when I try to iterate either of them (code below). I am able to find a file, by name, in the Downloads folder, though.
Has anyone been able to do this with the Desktop folder or the (real) Documents folder? (When I used NSDocumentDirectory it looked in the Documents folder attached to my container. I could find things that were in that. But it wasn't the same as the Documents folder that the user sees.)
If I turn off Sandboxing I have no problem iterating Desktop or Documents.
This is the code I used to test iterating in three NSSearchPathDirectories: NSDocumentDirectory, NSDesktopDirectory, and NSDownloadsDirectory.
NSFileManager* fm = [NSFileManager new];
NSError* err = nil;
NSURL* rootDirURL =
[fm URLForDirectory:NSDesktopDirectory
inDomain:NSUserDomainMask appropriateForURL:nil
create:NO error:&err];
// error-checking omitted
NSURL * theFormsFolderURL = [self formsFolderURL:rootDirURL];
- (NSURL *) formsFolderURL:(NSURL *)rootDirURL
{
NSFileManager * fm = [NSFileManager defaultManager];
NSDirectoryEnumerator* dir = [fm enumeratorAtURL:rootDirURL
includingPropertiesForKeys:nil
options:0 errorHandler:nil];
for (NSURL* f in dir)
{
{
}
}
return nil; // Dummy nil
}
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