8 calls to file_directory_temp() in Drupal 6

file_check_directory in includes/file.inc

Checks whether a directory exists and is writable.

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.

install_main in ./install.php

The Drupal installation happens in a series of steps. We begin by verifying that the current environment meets our minimum requirements. We then go on to verify that settings.php is properly configured. From there we connect to the configured database…

system_file_system_settings in modules/system/system.admin.inc

Form builder; Configure the site file handling.

system_requirements in modules/system/system.install

Implementation of hook_requirements().

upload_form_alter in modules/upload/upload.module