I recently updated to Xcode 15.0 and seem to be encountering permissions related errors after using the Replace Container function to replace an app container. Similarly, editing the current run scheme and choosing a new App Data container fails with an identical error.
It seems like the Documents directory and other similar directories are blocked from being able to write. Here is an example of what appears in the log after replacing the container:
Failed to create directory /var/mobile/Containers/Data/Application/A3C32E7A-34F3-4C69-B037-478027F2A4AC/Library/Preferences because of 13.
Couldn't write values for keys (
"/google/measurement/app_instance_id"
) in CFPrefsPlistSource<0x280a82760> (Domain: com.google.gmp.measurement, User: kCFPreferencesCurrentUser, ByHost: No, Container: (null), Contents Need Refresh: No): Directory needed
os_unix.c:47395: (13) lstat(/private/var/mobile/Containers/Data/Application/A3C32E7A-34F3-4C69-B037-478027F2A4AC/Documents)
- Permission denied os_unix.c:47395: (13) lstat(/private/var/mobile/Containers/Data/Application/A3C32E7A-34F3-4C69-B037-478027F2A4AC/Documents/<redacted>.sqlite)
- Permission denied os_unix.c:46898: (13) statfs(/private/var/mobile/Containers/Data/Application/A3C32E7A-34F3-4C69-B037-478027F2A4AC/Documents/<redacted>.sqlite)
- Permission denied
Steps to reproduce:
- Create a new app and replace
-viewDidLoad:with the following. This will write a string to a new file and read that string:
NSFileManager * const fileManager = [NSFileManager defaultManager];
NSURL * const documentsDirectoryURL = [[fileManager URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
if (!documentsDirectoryURL) {
[NSException raise:@"DocumentsDirectoryException" format:@"Application documents directory URL is nil"];
}
NSURL * const fileURL = [documentsDirectoryURL URLByAppendingPathComponent:@"test.txt"];
if ([fileManager fileExistsAtPath:[fileURL path]]) {
NSError *error;
if (![[NSFileManager defaultManager] removeItemAtPath:[fileURL path] error:&error]) {
[NSException raise:@"DocumentsDirectoryException" format:@"Encountered error removing file: %@",error];
}
}
NSString * const fileContents = [NSString stringWithFormat:@"Date: %@",[NSDate date]];
NSError *error;
if (![[fileContents dataUsingEncoding:NSUTF8StringEncoding] writeToURL:fileURL options:0 error:&error]) {
[NSException raise:@"DocumentsDirectoryException" format:@"Encountered error writing to file: %@",error];
}
NSString * const writtenFileContents = [[NSString alloc] initWithData:[NSData dataWithContentsOfURL:fileURL] encoding:NSUTF8StringEncoding];
NSLog(@"Written file contents: %@", writtenFileContents);
- Run the app and observe the log message "Written file contents: ..."
- Save the app container via Window > Devices & Simulators by clicking the app, clicking the "(...)" button, and then clicking "Download Container..."
- Use the same procedure in step 3 but instead, click "Replace Container..." and choose the existing app container that was downloaded
- Run the app again and observe that it fails with the following exception message:
*** Terminating app due to uncaught exception 'DocumentsDirectoryException', reason: 'Encountered error writing to file: Error Domain=NSCocoaErrorDomain Code=513 "You don’t have permission to save the file “test.txt” in the folder “Documents”." UserInfo={NSFilePath=/var/mobile/Containers/Data/Application/CF1E09C8-7BE2-4D87-8AD2-648AFBE038A5/Documents/test.txt, NSUnderlyingError=0x2831d4d50 {Error Domain=NSPOSIXErrorDomain Code=13 "Permission denied"}}'
Is anyone else encountering this issue and can confirm? Are my next steps to create a bug report? Is there a manner to escalating the bug report? This is a pretty core piece of functionality for QA and testing apps.
