std::experimental::filesystem::file_status::permissions
From cppreference.com
                    
                                        
                    < cpp | experimental | fs | file status
                    
                                                            
                    |   perms permissions() const;  | 
(1) | (filesystem TS) | 
|   void permissions( perms perm );  | 
(2) | (filesystem TS) | 
Accesses the file permissions information.
1) Returns file permissions information.
2) Sets file type to perm.
Parameters
| perm | - | file permissions to set to | 
Return value
1) File permissions information.
2) (none)
Exceptions
noexcept specification:  
noexcept