| hook_file_copy | modules/system/system.api.php | Respond to a file that has been copied. |
| hook_file_delete | modules/system/system.api.php | Respond to a file being deleted. |
| hook_file_download | modules/system/system.api.php | Control access to private file downloads and specify HTTP headers. |
| hook_file_insert | modules/system/system.api.php | Respond to a file being added. |
| hook_file_load | modules/system/system.api.php | Load additional information into file objects. |
| hook_file_move | modules/system/system.api.php | Respond to a file that has been moved. |
| hook_file_references | modules/system/system.api.php | Report the number of times a file is referenced by a module. |
| hook_file_update | modules/system/system.api.php | Respond to a file being updated. |
| hook_file_validate | modules/system/system.api.php | Check that files meet a given criteria. |
