/*-

 * Copyright (c) 1990, 1993, 1994

 *	The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *	This product includes software developed by the University of

 *	California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#if defined(LIBC_SCCS) && !defined(lint)

static char sccsid[] = "@(#)rec_close.c	8.9 (Berkeley) 11/18/94";

#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>

#include <sys/uio.h>

#ifdef RECNO_USE_MMAP

#include <sys/mman.h>

#endif

#include <errno.h>

#include <limits.h>

#include <stdio.h>

#include <unistd.h>

#include "db-int.h"

#include "recno.h"

/*

 * __REC_CLOSE -- Close a recno tree.

 *

 * Parameters:

 *	dbp:	pointer to access method

 *

 * Returns:

 *	RET_ERROR, RET_SUCCESS

 */

int

__rec_close(dbp)

	DB *dbp;

{

	BTREE *t;

	int status;

	t = dbp->internal;

	/* Toss any page pinned across calls. */

	if (t->bt_pinned != NULL) {

		mpool_put(t->bt_mp, t->bt_pinned, 0);

		t->bt_pinned = NULL;

	}

	if (__rec_sync(dbp, 0) == RET_ERROR)

		return (RET_ERROR);

	/* Committed to closing. */

	status = RET_SUCCESS;

#ifdef	RECNO_USE_MMAP

	if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize))

		status = RET_ERROR;

#endif

	if (!F_ISSET(t, R_INMEM)) {

		if (F_ISSET(t, R_CLOSEFP)) {

			if (fclose(t->bt_rfp))

				status = RET_ERROR;

		} else

			if (close(t->bt_rfd))

				status = RET_ERROR;

	}

	if (__bt_close(dbp) == RET_ERROR)

		status = RET_ERROR;

	return (status);

}

/*

 * __REC_SYNC -- sync the recno tree to disk.

 *

 * Parameters:

 *	dbp:	pointer to access method

 *

 * Returns:

 *	RET_SUCCESS, RET_ERROR.

 */

int

__rec_sync(dbp, flags)

	const DB *dbp;

	u_int flags;

{

	struct iovec iov[2];

	BTREE *t;

	DBT data, key;

	off_t off;

	recno_t scursor, trec;

	int status;

	t = dbp->internal;

	/* Toss any page pinned across calls. */

	if (t->bt_pinned != NULL) {

		mpool_put(t->bt_mp, t->bt_pinned, 0);

		t->bt_pinned = NULL;

	}

	if (flags == R_RECNOSYNC)

		return (__bt_sync(dbp, 0));

	if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED))

		return (RET_SUCCESS);

	/* Read any remaining records into the tree. */

	if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)

		return (RET_ERROR);

	/* Rewind the file descriptor. */

	if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0)

		return (RET_ERROR);

	/* Save the cursor. */

	scursor = t->bt_cursor.rcursor;

	key.size = sizeof(recno_t);

	key.data = &tre;;

	if (F_ISSET(t, R_FIXLEN)) {

		/*

		 * We assume that fixed length records are all fixed length.

		 * Any that aren't are either EINVAL'd or corrected by the

		 * record put code.

		 */

		status = (dbp->seq)(dbp, &key, &data, R_FIRST);

		while (status == RET_SUCCESS) {

			if (write(t->bt_rfd, data.data, data.size) !=

			    (ssize_t)data.size)

				return (RET_ERROR);

			status = (dbp->seq)(dbp, &key, &data, R_NEXT);

		}

	} else {

		iov[1].iov_base = &t->bt_bval;

		iov[1].iov_len = 1;

		status = (dbp->seq)(dbp, &key, &data, R_FIRST);

		while (status == RET_SUCCESS) {

			iov[0].iov_base = data.data;

			iov[0].iov_len = data.size;

			if (writev(t->bt_rfd, iov, 2) != (ssize_t)data.size + 1)

				return (RET_ERROR);

			status = (dbp->seq)(dbp, &key, &data, R_NEXT);

		}

	}

	/* Restore the cursor. */

	t->bt_cursor.rcursor = scursor;

	if (status == RET_ERROR)

		return (RET_ERROR);

	if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1)

		return (RET_ERROR);

	if (ftruncate(t->bt_rfd, off))

		return (RET_ERROR);

	F_CLR(t, R_MODIFIED);

	return (RET_SUCCESS);

}