7 calls to file_directory_temp() in Drupal 5

file_check_directory in includes/file.inc

Check that the directory exists and is writable. Directories need to have execute permissions to be considered a directory by FTP servers, etc.

file_check_upload in includes/file.inc

Verify an uploaded file.

file_create_path in includes/file.inc

Make sure the destination is a complete path and resides in the file system directory, if it is not prepend the file system directory.

file_save_data in includes/file.inc

Save a string to the specified destination.

file_save_upload in includes/file.inc

Saves a file upload to a new location. The source file is validated as a proper upload and handled as such.

system_file_system_settings in modules/system/system.module

upload_form_alter in modules/upload/upload.module