How to perform chmod() in Objective C

Question

What's the equivalent of C's:

 chmod(MY_FILE, 0777);

in Objective C? I am trying to write to an existing locked file without performing

chmod +x MY_FILE

on the terminal.

Answer 1

You can use Cocoa's -setAttributes:ofItemAtPath:error: to do this job.

[[NSFileManager defaultManager] setAttributes:@{ NSFilePosixPermissions : @0666 }
                                 ofItemAtPath:… 
                                        error:&error];

Of course you need the rights to do that.

Answer 2

You can use C's chmod().

Enter man 2 chmod in the terminal for the documentation and related functions.