cif_split_primitive(1) on Linux
The text f66f78ef602c, as Debian 10 (Buster) shipped it.
Split CIF files into separate files with one data_ section each. This is a very naive and primitive version of the splitter, which expects each data_... section to start on a new line. It may fail on some CIF files that do not follow such convention. For splitting of any correctly formatted CIF files, one must do full CIF parsing using CIF grammar and tokenisation of the file.