/usr/lib/lazarus/0.9.30.4/images/bookmark.sh is in lazarus-src-0.9.30.4 0.9.30.4-6.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 | #!/usr/bin/env bash
../tools/lazres bookmark.lrs @bookmark_list.txt
|