MakeOpenFile      440 ext/pty/pty.c      MakeOpenFile(rport, rfptr);
MakeOpenFile      441 ext/pty/pty.c      MakeOpenFile(wport, wfptr);
MakeOpenFile      241 ext/socket/socket.c     MakeOpenFile(sock, fp);
MakeOpenFile     4243 io.c               MakeOpenFile(io, fptr);
MakeOpenFile     4686 io.c               MakeOpenFile(port, fptr);
MakeOpenFile     4697 io.c                   MakeOpenFile(write_port, write_fptr);
MakeOpenFile     5381 io.c               MakeOpenFile(dest, fptr);
MakeOpenFile     5798 io.c               MakeOpenFile(io, fp);
MakeOpenFile     5943 io.c               MakeOpenFile(io, fp);