ckeditor_image_upload in modules/ckeditor/ckeditor.pages.inc

Menu callback; Saves images uploaded via copy/paste into the editor.

file_managed_file_save_upload in modules/file/file.module

Saves any files that have been uploaded into a managed_file element.

_file_test_form_submit in modules/simpletest/tests/file_test.module

Process the upload.

_image_field_default_image_validate in modules/image/image.field.inc

Element validation function for setting a default image.

installer_manager_download_project in modules/installer/installer.manager.inc

Downloads a project given a project url.

locale_translate_import_form_submit in modules/locale/locale.bulk.inc

Process the locale import form submission.

system_site_information_settings_validate in modules/system/system.admin.inc

Validates the submitted site-information form.

user_validate_picture in modules/user/user.module

Validates an image uploaded by a user.