This is part of the libosmocore "meta"-library. the libosmocore library contains various utility functions that were originally developed as part of the openbsc project, but which are of a more generic nature and thus useful to (at least) other programs that are developed in the sphere of free software / open source mobile communication.

the libosmovty library in particular implements the interactive command-line on the vty (virtual tty) as well as configuration file parsing.