rec_close.c revision 71579 
1/*-
2 * Copyright (c) 1990, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD: head/lib/libc/db/recno/rec_close.c 71579 2001-01-24 13:01:12Z deischen $
34 */
35
36#if defined(LIBC_SCCS) && !defined(lint)
37static char sccsid[] = "@(#)rec_close.c	8.6 (Berkeley) 8/18/94";
38#endif /* LIBC_SCCS and not lint */
39
40#include "namespace.h"
41#include <sys/types.h>
42#include <sys/uio.h>
43#include <sys/mman.h>
44
45#include <errno.h>
46#include <limits.h>
47#include <stdio.h>
48#include <unistd.h>
49#include "un-namespace.h"
50
51#include <db.h>
52#include "recno.h"
53
54/*
55 * __REC_CLOSE -- Close a recno tree.
56 *
57 * Parameters:
58 *	dbp:	pointer to access method
59 *
60 * Returns:
61 *	RET_ERROR, RET_SUCCESS
62 */
63int
64__rec_close(dbp)
65	DB *dbp;
66{
67	BTREE *t;
68	int status;
69
70	t = dbp->internal;
71
72	/* Toss any page pinned across calls. */
73	if (t->bt_pinned != NULL) {
74		mpool_put(t->bt_mp, t->bt_pinned, 0);
75		t->bt_pinned = NULL;
76	}
77
78	if (__rec_sync(dbp, 0) == RET_ERROR)
79		return (RET_ERROR);
80
81	/* Committed to closing. */
82	status = RET_SUCCESS;
83	if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize))
84		status = RET_ERROR;
85
86	if (!F_ISSET(t, R_INMEM))
87		if (F_ISSET(t, R_CLOSEFP)) {
88			if (fclose(t->bt_rfp))
89				status = RET_ERROR;
90		} else
91			if (_close(t->bt_rfd))
92				status = RET_ERROR;
93
94	if (__bt_close(dbp) == RET_ERROR)
95		status = RET_ERROR;
96
97	return (status);
98}
99
100/*
101 * __REC_SYNC -- sync the recno tree to disk.
102 *
103 * Parameters:
104 *	dbp:	pointer to access method
105 *
106 * Returns:
107 *	RET_SUCCESS, RET_ERROR.
108 */
109int
110__rec_sync(dbp, flags)
111	const DB *dbp;
112	u_int flags;
113{
114	struct iovec iov[2];
115	BTREE *t;
116	DBT data, key;
117	off_t off;
118	recno_t scursor, trec;
119	int status;
120
121	t = dbp->internal;
122
123	/* Toss any page pinned across calls. */
124	if (t->bt_pinned != NULL) {
125		mpool_put(t->bt_mp, t->bt_pinned, 0);
126		t->bt_pinned = NULL;
127	}
128
129	if (flags == R_RECNOSYNC)
130		return (__bt_sync(dbp, 0));
131
132	if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED))
133		return (RET_SUCCESS);
134
135	/* Read any remaining records into the tree. */
136	if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
137		return (RET_ERROR);
138
139	/* Rewind the file descriptor. */
140	if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0)
141		return (RET_ERROR);
142
143	/* Save the cursor. */
144	scursor = t->bt_cursor.rcursor;
145
146	key.size = sizeof(recno_t);
147	key.data = &trec;
148
149	if (F_ISSET(t, R_FIXLEN)) {
150		/*
151		 * We assume that fixed length records are all fixed length.
152		 * Any that aren't are either EINVAL'd or corrected by the
153		 * record put code.
154		 */
155		status = (dbp->seq)(dbp, &key, &data, R_FIRST);
156		while (status == RET_SUCCESS) {
157			if (_write(t->bt_rfd, data.data, data.size) !=
158			    data.size)
159				return (RET_ERROR);
160			status = (dbp->seq)(dbp, &key, &data, R_NEXT);
161		}
162	} else {
163		iov[1].iov_base = (char *)&t->bt_bval;
164		iov[1].iov_len = 1;
165
166		status = (dbp->seq)(dbp, &key, &data, R_FIRST);
167		while (status == RET_SUCCESS) {
168			iov[0].iov_base = data.data;
169			iov[0].iov_len = data.size;
170			if (_writev(t->bt_rfd, iov, 2) != data.size + 1)
171				return (RET_ERROR);
172			status = (dbp->seq)(dbp, &key, &data, R_NEXT);
173		}
174	}
175
176	/* Restore the cursor. */
177	t->bt_cursor.rcursor = scursor;
178
179	if (status == RET_ERROR)
180		return (RET_ERROR);
181	if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1)
182		return (RET_ERROR);
183	if (ftruncate(t->bt_rfd, off))
184		return (RET_ERROR);
185	F_CLR(t, R_MODIFIED);
186	return (RET_SUCCESS);
187}
188