Someone

/**
 * Moves temporary (working) images to the final directory and stores
 * relevant information in the files table
 */
function _image_insert($node, $label, $image) {
  // Don't duplicate images when a derivative == _original
  if (($label != '_original') && ($image == file_create_path($node->images['_original']))) {
    return;
  }
  //$dest = 'var/www/html/files/images/' . basename($image);
  
  $dest = _image_filename(basename($image));
  if (file_copy($image, $dest)) {
    $info = image_get_info(file_create_path($dest));
    $file->filename = $label;
    $file->filepath = _image_filename(basename($image));
    $file->filemime = $info['mime_type'];
    $file->filesize = filesize(file_create_path($dest));
    $fid = db_next_id('{files}_fid');
    db_query("INSERT INTO {files} (fid, nid, filename, filepath, filemime, filesize) VALUES (%d, %d, '%s', '%s', '%s', '%s')",
             $fid, $node->nid, $file->filename, $file->filepath, $file->filemime, $file->filesize);
    db_query("INSERT INTO {file_revisions} (fid, vid, description, list) VALUES (%d, %d, '%s', %d)",
             $fid, $node->vid, '', 0);
  }
}

/**
 * Copies a file to a new location. This is a powerful function that in many ways
 * performs like an advanced version of copy().
 * - Checks if $source and $dest are valid and readable/writable.
 * - Performs a file copy if $source is not equal to $dest.
 * - If file already exists in $dest either the call will error out, replace the
 *   file or rename the file based on the $replace parameter.
 *
 * @param $source A string specifying the file location of the original file.
 *   This parameter will contain the resulting destination filename in case of
 *   success.
 * @param $dest A string containing the directory $source should be copied to.
 *   If this value is omitted, Drupal's 'files' directory will be used.
 * @param $replace Replace behavior when the destination file already exists.
 *   - FILE_EXISTS_REPLACE - Replace the existing file
 *   - FILE_EXISTS_RENAME - Append _{incrementing number} until the filename is unique
 *   - FILE_EXISTS_ERROR - Do nothing and return false.
 * @return True for success, false for failure.
 */
function file_copy(&$source, $dest = 0, $replace = FILE_EXISTS_RENAME) {
  $dest = file_create_path($dest);

  $directory = $dest;
  $basename = file_check_path($directory);

  // Make sure we at least have a valid directory.
  if ($basename === false) {
    $source = is_object($source) ? $source->filepath : $source;
    drupal_set_message(t('The selected file %file could not be uploaded, because the destination %directory is not properly configured.', array('%file' => theme('placeholder', $source), '%directory' => theme('placeholder', $dest))), 'error');
    watchdog('file system', t('The selected file %file could not be uploaded, because the destination %directory could not be found, or because its permissions do not allow the file to be written.', array('%file' => theme('placeholder', $source), '%directory' => theme('placeholder', $dest))), WATCHDOG_ERROR);
    return 0;
  }

  // Process a file upload object.
  if (is_object($source)) {
    $file = $source;
    $source = $file->filepath;
    if (!$basename) {
      $basename = $file->filename;
    }
  }

  $source = realpath($source);
  if (!file_exists($source)) {
    drupal_set_message(t('The selected file %file could not be copied, because no file by that name exists.  Please check that you supplied the correct filename.', array('%file' => theme('placeholder', $source))), 'error');
    return 0;
  }

  // If the destination file is not specified then use the filename of the source file.
  $basename = $basename ? $basename : basename($source);
  $dest = $directory .'/'. $basename;

  // Make sure source and destination filenames are not the same, makes no sense
  // to copy it if they are. In fact copying the file will most likely result in
  // a 0 byte file. Which is bad. Real bad.
  if ($source != realpath($dest)) {
    if (file_exists($dest)) {
      switch ($replace) {
        case FILE_EXISTS_RENAME:
          // Destination file already exists and we can't replace is so we try and
          // and find a new filename.
          if ($pos = strrpos($basename, '.')) {
            $name = substr($basename, 0, $pos);
            $ext = substr($basename, $pos);
          }
          else {
            $name = $basename;
          }

          $counter = 0;
          do {
            $dest = $directory .'/'. $name .'_'. $counter++ . $ext;
          } while (file_exists($dest));
          break;

        case FILE_EXISTS_ERROR:
          drupal_set_message(t('The selected file %file could not be copied, because a file by that name already exists in the destination.', array('%file' => theme('placeholder', $source))), 'error');
          return 0;
      }
    }

    if (!@copy($source, $dest)) {
      drupal_set_message(t('The selected file %file could not be copied.', array('%file' => theme('placeholder', $source))), 'error');
      return 0;
    }

    // Give everyone read access so that FTP'd users or
    // non-webserver users can see/read these files.
    @chmod($dest, 0664);
  }

  if (is_object($file)) {
    $file->filename = $basename;
    $file->filepath = $dest;
    $source = $file;
  }
  else {
    $source = $dest;
  }

  return 1; // Everything went ok.
}