10 uses of FILE_MODIFY_PERMISSIONS

DirectoryTest::testFileCheckDirectoryHandling in drupal/core/modules/system/lib/Drupal/system/Tests/File/DirectoryTest.php
Test directory handling functions.
file_prepare_directory in drupal/core/includes/file.inc
Checks that the directory exists and is writable.
image_install in drupal/core/modules/image/image.install
Implements hook_install().
image_style_create_derivative in drupal/core/modules/image/image.module
Creates a new image derivative based on an image style.
install_check_translations in drupal/core/includes/install.core.inc
Checks installation requirements and reports any errors.
install_ensure_config_directory in drupal/core/includes/install.inc
Ensures that the config directory exists and is writable, or can be made so.
locale_install in drupal/core/modules/locale/locale.install
Implements hook_install().
system_requirements in drupal/core/modules/system/system.install
Test and report Drupal installation requirements.
TestBase::prepareEnvironment in drupal/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
Prepares the current environment for running the test.
user_update_8011 in drupal/core/modules/user/user.install
Create user picture field.