7 uses of FILE_READABLE in Zircon Profile 8

drupal_install_fix_file in core/includes/install.inc

Attempts to fix file permissions.

drupal_install_mkdir in core/includes/install.inc

Creates a directory with the specified permissions.

drupal_verify_install_file in core/includes/install.inc

Verifies the state of the specified file.

install_check_requirements in core/includes/install.core.inc

Checks installation requirements and reports any errors.

simpletest_requirements in core/modules/simpletest/simpletest.install

Implements hook_requirements().

SiteConfigureForm::buildForm in core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php

Form constructor.

system_requirements in core/modules/system/system.install

Implements hook_requirements().