Hi all
I'm trying to write a function that opens a file, does some checking and returns to the main program. The problem is that the function is located in a separate module and the main program is unaware of the file at all. All it's interested in is the result of the function. So it can't pass the file as a parameter. On the other hand I don't want the function to open and close the file on every call. For example, here is my code in the function:

_RIOFB_T *fb;
_RFILE *infile;
if ( (infile = _Ropen("FILENAME", "rr")) == NULL ) {
 print_err("Can't open FILENAME file\n");
 return 0;
}
....
// some code here
....
_Rclose(infile);
return 1;

The first solution that came to my mind is to declare infile "static" and only open it once. It actually works, but then I don't know when to close the file, which is probably okay because the file will be closed when the main program finishes. I guess it's just not the correct programming. It's actually a very small function, so I would want to create global variables and handle it with 2 more functions (one for open and another for close).
Are there any other ways?

Thanks in advance.

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