/sys$common/syshlp/helplib.hlb CC, Run-time functions, longname  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Returns the full name of the terminal.  The name parameter is a
  character-string buffer with a minimum length of 64 characters, and
  must be large enough to hold the name.

  Syntax:

       #include <curses.h>

       void longname(char *termbuf, char *name);