Drupal get database configuration

Question

Is there any function preserved to extract database configuration inside of my code, something like $db_user = drupal_get_dbuser(); $db_pass = drupal_get_dbpass();
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Answer 1

The code for this is:

<?php
  global $db_url;
  $creds =  parse_url($db_url);
  print $creds['user'];
  print $creds['pass'];
  var_dump($creds);
?>

More detailed info and edge-cases can be found by reading the code of http://api.drupal.org/api/function/db_connect/6