function install_check_requirements in Drupal 7
Same name and namespace in other branches
- 8 core/includes/install.core.inc \install_check_requirements()
- 5 install.php \install_check_requirements()
- 6 install.php \install_check_requirements()
- 9 core/includes/install.core.inc \install_check_requirements()
Checks installation requirements and reports any errors.
1 call to install_check_requirements()
- install_verify_requirements in includes/
install.core.inc - Verifies the requirements for installing Drupal.
File
- includes/
install.core.inc, line 1628 - API functions for installing Drupal.
Code
function install_check_requirements($install_state) {
$profile = $install_state['parameters']['profile'];
// Check the profile requirements.
$requirements = drupal_check_profile($profile);
// If Drupal is not set up already, we need to create a settings file.
if (!$install_state['settings_verified']) {
$writable = FALSE;
$conf_path = './' . conf_path(FALSE, TRUE);
$settings_file = $conf_path . '/settings.php';
$default_settings_file = './sites/default/default.settings.php';
$file = $conf_path;
$exists = FALSE;
// Verify that the directory exists.
if (drupal_verify_install_file($conf_path, FILE_EXIST, 'dir')) {
// Check if a settings.php file already exists.
$file = $settings_file;
if (drupal_verify_install_file($settings_file, FILE_EXIST)) {
// If it does, make sure it is writable.
$writable = drupal_verify_install_file($settings_file, FILE_READABLE | FILE_WRITABLE);
$exists = TRUE;
}
}
// If default.settings.php does not exist, or is not readable, throw an
// error.
if (!drupal_verify_install_file($default_settings_file, FILE_EXIST | FILE_READABLE)) {
$requirements['default settings file exists'] = array(
'title' => st('Default settings file'),
'value' => st('The default settings file does not exist.'),
'severity' => REQUIREMENT_ERROR,
'description' => st('The @drupal installer requires that the %default-file file not be modified in any way from the original download.', array(
'@drupal' => drupal_install_profile_distribution_name(),
'%default-file' => $default_settings_file,
)),
);
}
elseif (!$exists) {
$copied = drupal_verify_install_file($conf_path, FILE_EXIST | FILE_WRITABLE, 'dir') && @copy($default_settings_file, $settings_file);
if ($copied) {
// If the new settings file has the same owner as default.settings.php,
// this means default.settings.php is owned by the webserver user.
// This is an inherent security weakness because it allows a malicious
// webserver process to append arbitrary PHP code and then execute it.
// However, it is also a common configuration on shared hosting, and
// there is nothing Drupal can do to prevent it. In this situation,
// having settings.php also owned by the webserver does not introduce
// any additional security risk, so we keep the file in place.
if (fileowner($default_settings_file) === fileowner($settings_file)) {
$writable = drupal_verify_install_file($settings_file, FILE_READABLE | FILE_WRITABLE);
$exists = TRUE;
}
else {
$deleted = @drupal_unlink($settings_file);
// We expect deleting the file to be successful (since we just
// created it ourselves above), but if it fails somehow, we set a
// variable so we can display a one-time error message to the
// administrator at the bottom of the requirements list. We also try
// to make the file writable, to eliminate any conflicting error
// messages in the requirements list.
$exists = !$deleted;
if ($exists) {
$settings_file_ownership_error = TRUE;
$writable = drupal_verify_install_file($settings_file, FILE_READABLE | FILE_WRITABLE);
}
}
}
}
// If settings.php does not exist, throw an error.
if (!$exists) {
$requirements['settings file exists'] = array(
'title' => st('Settings file'),
'value' => st('The settings file does not exist.'),
'severity' => REQUIREMENT_ERROR,
'description' => st('The @drupal installer requires that you create a settings file as part of the installation process. Copy the %default_file file to %file. More details about installing Drupal are available in <a href="@install_txt">INSTALL.txt</a>.', array(
'@drupal' => drupal_install_profile_distribution_name(),
'%file' => $file,
'%default_file' => $default_settings_file,
'@install_txt' => base_path() . 'INSTALL.txt',
)),
);
}
else {
$requirements['settings file exists'] = array(
'title' => st('Settings file'),
'value' => st('The %file file exists.', array(
'%file' => $file,
)),
);
// If settings.php is not writable, throw an error.
if (!$writable) {
$requirements['settings file writable'] = array(
'title' => st('Settings file'),
'value' => st('The settings file is not writable.'),
'severity' => REQUIREMENT_ERROR,
'description' => st('The @drupal installer requires write permissions to %file during the installation process. If you are unsure how to grant file permissions, consult the <a href="@handbook_url">online handbook</a>.', array(
'@drupal' => drupal_install_profile_distribution_name(),
'%file' => $file,
'@handbook_url' => 'http://drupal.org/server-permissions',
)),
);
}
else {
$requirements['settings file'] = array(
'title' => st('Settings file'),
'value' => st('The settings file is writable.'),
);
}
if (!empty($settings_file_ownership_error)) {
$requirements['settings file ownership'] = array(
'title' => st('Settings file'),
'value' => st('The settings file is owned by the web server.'),
'severity' => REQUIREMENT_ERROR,
'description' => st('The @drupal installer failed to create a settings file with proper file ownership. Log on to your web server, remove the existing %file file, and create a new one by copying the %default_file file to %file. More details about installing Drupal are available in <a href="@install_txt">INSTALL.txt</a>. If you have problems with the file permissions on your server, consult the <a href="@handbook_url">online handbook</a>.', array(
'@drupal' => drupal_install_profile_distribution_name(),
'%file' => $file,
'%default_file' => $default_settings_file,
'@install_txt' => base_path() . 'INSTALL.txt',
'@handbook_url' => 'http://drupal.org/server-permissions',
)),
);
}
}
}
return $requirements;
}