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diff --git a/devio/open.h b/devio/open.h
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-/* Per-open information for devio.
-
- Copyright (C) 1995 Free Software Foundation, Inc.
-
- Written by Miles Bader <miles@gnu.ai.mit.edu>
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2, or (at
- your option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#ifndef __OPEN_H__
-#define __OPEN_H__
-
-#include "iostate.h"
-
-/* ---------------------------------------------------------------- */
-
-/* A structure describing a particular i/o stream on this device. */
-struct open
-{
- /* Current state of our output stream -- location and the buffer used to do
- buffered i/o. */
- struct io_state io_state;
-
- /* The memory window we're using to do i/o. This may be NULL, indicating
- we're not doing buffered random access i/o. */
- struct window *window;
-
- /* The device that this an open on. */
- struct dev *dev;
-};
-
-/* Returns a new per-open structure for the device DEV in OPEN. If an error
- occurs, the error-code is returned, otherwise 0. */
-error_t open_create(struct dev *dev, struct open **open);
-
-/* Free OPEN and any resources it holds. */
-void open_free(struct open *open);
-
-/* Returns the appropiate io_state object for OPEN (which may be either
- per-open or a per-device depending on the device). */
-struct io_state *open_get_io_state(struct open *open);
-
-/* Writes up to LEN bytes from BUF to OPEN's device at device offset OFFS
- (which may be ignored if the device doesn't support random access),
- and returns the number of bytes written in AMOUNT. If no error occurs,
- zero is returned, otherwise the error code is returned. */
-error_t open_write(struct open *open, vm_address_t buf, vm_size_t len,
- vm_size_t *amount, off_t offs);
-
-/* Reads up to AMOUNT bytes from the device into BUF and BUF_LEN using the
- standard mach out-array convention. If no error occurs, zero is returned,
- otherwise the error code is returned. */
-error_t open_read(struct open *open, vm_address_t *buf, vm_size_t *buf_len,
- vm_size_t amount, off_t offs);
-
-/* Set OPEN's location to OFFS, interpreted according to WHENCE as by seek.
- The new absolute location is returned in NEW_OFFS (and may not be the same
- as OFFS). If no error occurs, zero is returned, otherwise the error code
- is returned. */
-error_t open_seek (struct open *open, off_t offs, int whence, off_t *new_offs);
-
-#endif /* !__OPEN_H__ */