- file_unmanaged_copy in includes/
file.inc - Copies a file to a new location without invoking the file API.
- StreamWrapperTest::testUriFunctions in modules/
simpletest/ tests/ file.test - Test the URI and target functions.
- system_retrieve_file in modules/
system/ system.module - Attempts to get a file using drupal_http_request and to store it locally.