How to get a writable FILE* from RFile in Ruby 1.9.1?

[bbr322]

rb_io_t *fptr;

Check_Type(f, T_FILE);
rb_io_binmode(f);
GetOpenFile(f, fptr);
rb_io_check_writable(fptr);
fprintf(rb_io_stdio_file(fptr), pstr);

 

[Roger Pack]

rb_io_t *fptr;

Check_Type(f, T_FILE);
rb_io_binmode(f);
GetOpenFile(f, fptr);
rb_io_check_writable(fptr);
fprintf(rb_io_stdio_file(fptr), pstr);

is that a question or an answer?
-=r