function clamav_file_validate in ClamAV 7

Same name and namespace in other branches

1. 8 clamav.module \clamav_file_validate()
2. 2.x clamav.module \clamav_file_validate()

Implements hook_file_validate().

File

./clamav.module, line 84

Integrate ClamAV to allow uploaded files to be scanned for viruses.

Code

function clamav_file_validate($file) {
  $errors = array();

  // If ClamAV scanning has been disabled on the config page, abort early.
  if (!variable_get('clamav_enabled', TRUE)) {
    return $errors;
  }

  // Check whether files of this scheme should be scanned.
  $scheme = clamav_get_file_scheme($file);
  if (!empty($scheme) && !clamav_scheme_is_scannable($scheme)) {
    return $errors;
  }

  // If any module that implements hook_clamav_file_is_scannable() returns
  // FALSE then we don't scan this file and finish with no errors.
  $modules = module_implements('clamav_file_is_scannable');
  foreach ($modules as $module) {
    if (module_invoke($module, 'clamav_file_is_scannable', $file) === FALSE) {
      return $errors;
    }
  }

  // Don't try to scan non-existent files.
  if (!file_exists($file->uri)) {
    if (variable_get('clamav_verbose', CLAMAV_VERBOSE_DEFAULT)) {
      watchdog('clamav', 'Non-existent file sent for scanning: %filename (%fileuri)', array(
        '%filename' => $file->filename,
        '%fileuri' => $file->uri,
      ), WATCHDOG_DEBUG);
    }
    return $errors;
  }
  require_once dirname(__FILE__) . '/clamav.inc';
  $result = clamav_scan_file($file->uri, $file->filename);
  if ($result == CLAMAV_SCANRESULT_INFECTED) {
    $errors[] = t('A virus has been detected in the file. The file will not be accepted.');
  }
  elseif ($result == CLAMAV_SCANRESULT_UNCHECKED && variable_get('clamav_unchecked_files', CLAMAV_DEFAULT_UNCHECKED) == CLAMAV_BLOCK_UNCHECKED) {
    $errors[] = t('The anti-virus scanner was not able to check the file. The file cannot be uploaded. Please contact the site administrator if this problem persists.');
  }
  return $errors;
}