When you’re done with an RPM file, close it with Fclose:

int Fclose(FD_t fd);

Fclose acts much like the standard C function fclose(3). The FD_t is an RPM data type that is very similar to a FILE pointer.

The RPM I/O subsystem, defined with rpmio.h, includes functions that mimic (and in most cases wrap) the ANSI C stdio functions. These include: Fopen, Fclose, Fread, Fwrite, Ferror, Fflush, Fileno, and Fseek.

These functions wrap the ANSI C stdio functions to add new features. The Fopen function, for example, supports HTTP or FTP URLs in the place of a file name, so long as you append ".ufdio" to the mode.