8 calls to drupal_mkdir()

DrupalLocalStreamWrapper::mkdir in includes/stream_wrappers.inc
Support for mkdir().
drupal_install_mkdir in includes/install.inc
Creates a directory with the specified permissions.
FileDirectoryTest::testFileCheckLocalDirectoryHandling in modules/simpletest/tests/file.test
Test local directory handling functions.
FileTestCase::createDirectory in modules/simpletest/tests/file.test
Create a directory and assert it exists.
file_prepare_directory in includes/file.inc
Checks that the directory exists and is writable.
HtaccessTest::getProtectedFiles in modules/system/system.test
Get an array of file paths for access testing.
RetrieveFileTestCase::testFileRetrieving in modules/system/system.test
Invokes system_retrieve_file() in several scenarios.
system_check_directory in modules/system/system.module
Checks the existence of the directory specified in $form_element.

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