Re: Quicksand boxed – a tale of woe.

[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

> On Apr 12, 2018, at 5:03 PM, Joel Norvell  wrote:
> 
> 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:];
>   // 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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> 
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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:];
// 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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