/* $Header$ */

/*

* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.

*

* This product is part of the Amsterdam Compiler Kit.

*

* Permission to use, sell, duplicate or disclose this software must be

* obtained in writing. Requests for such permissions may be sent to

*

* Dr. Andrew S. Tanenbaum

* Wiskundig Seminarium

* Vrije Universiteit

* Postbox 7161

* 1007 MC Amsterdam

* The Netherlands

*

*/

#include <pc_file.h>

#include <pc_err.h>

extern struct file *_curfil;

extern _trp();

extern _incpt();

_rf(f) struct file *f; {

_curfil = f;

if ((f->flags&0377) != MAGIC)

_trp(EBADF);

if (f->flags & WRBIT)

_trp(EREADF);

if ((f->flags & WINDOW) == 0)

_incpt(f);

}