rec_close.c revision 165903 
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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)rec_close.c	8.6 (Berkeley) 8/18/94";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/lib/libc/db/recno/rec_close.c 165903 2007-01-09 00:28:16Z imp $");
35
36#include "namespace.h"
37#include <sys/types.h>
38#include <sys/uio.h>
39#include <sys/mman.h>
40
41#include <errno.h>
42#include <limits.h>
43#include <stdio.h>
44#include <unistd.h>
45#include "un-namespace.h"
46
47#include <db.h>
48#include "recno.h"
49
50/*
51 * __REC_CLOSE -- Close a recno tree.
52 *
53 * Parameters:
54 *	dbp:	pointer to access method
55 *
56 * Returns:
57 *	RET_ERROR, RET_SUCCESS
58 */
59int
60__rec_close(dbp)
61	DB *dbp;
62{
63	BTREE *t;
64	int status;
65
66	t = dbp->internal;
67
68	/* Toss any page pinned across calls. */
69	if (t->bt_pinned != NULL) {
70		mpool_put(t->bt_mp, t->bt_pinned, 0);
71		t->bt_pinned = NULL;
72	}
73
74	if (__rec_sync(dbp, 0) == RET_ERROR)
75		return (RET_ERROR);
76
77	/* Committed to closing. */
78	status = RET_SUCCESS;
79	if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize))
80		status = RET_ERROR;
81
82	if (!F_ISSET(t, R_INMEM)) {
83		if (F_ISSET(t, R_CLOSEFP)) {
84			if (fclose(t->bt_rfp))
85				status = RET_ERROR;
86		} else
87			if (_close(t->bt_rfd))
88				status = RET_ERROR;
89	}
90
91	if (__bt_close(dbp) == RET_ERROR)
92		status = RET_ERROR;
93
94	return (status);
95}
96
97/*
98 * __REC_SYNC -- sync the recno tree to disk.
99 *
100 * Parameters:
101 *	dbp:	pointer to access method
102 *
103 * Returns:
104 *	RET_SUCCESS, RET_ERROR.
105 */
106int
107__rec_sync(dbp, flags)
108	const DB *dbp;
109	u_int flags;
110{
111	struct iovec iov[2];
112	BTREE *t;
113	DBT data, key;
114	off_t off;
115	recno_t scursor, trec;
116	int status;
117
118	t = dbp->internal;
119
120	/* Toss any page pinned across calls. */
121	if (t->bt_pinned != NULL) {
122		mpool_put(t->bt_mp, t->bt_pinned, 0);
123		t->bt_pinned = NULL;
124	}
125
126	if (flags == R_RECNOSYNC)
127		return (__bt_sync(dbp, 0));
128
129	if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED))
130		return (RET_SUCCESS);
131
132	/* Read any remaining records into the tree. */
133	if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
134		return (RET_ERROR);
135
136	/* Rewind the file descriptor. */
137	if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0)
138		return (RET_ERROR);
139
140	/* Save the cursor. */
141	scursor = t->bt_cursor.rcursor;
142
143	key.size = sizeof(recno_t);
144	key.data = &trec;
145
146	if (F_ISSET(t, R_FIXLEN)) {
147		/*
148		 * We assume that fixed length records are all fixed length.
149		 * Any that aren't are either EINVAL'd or corrected by the
150		 * record put code.
151		 */
152		status = (dbp->seq)(dbp, &key, &data, R_FIRST);
153		while (status == RET_SUCCESS) {
154			if (_write(t->bt_rfd, data.data, data.size) !=
155			    data.size)
156				return (RET_ERROR);
157			status = (dbp->seq)(dbp, &key, &data, R_NEXT);
158		}
159	} else {
160		iov[1].iov_base = (char *)&t->bt_bval;
161		iov[1].iov_len = 1;
162
163		status = (dbp->seq)(dbp, &key, &data, R_FIRST);
164		while (status == RET_SUCCESS) {
165			iov[0].iov_base = data.data;
166			iov[0].iov_len = data.size;
167			if (_writev(t->bt_rfd, iov, 2) != data.size + 1)
168				return (RET_ERROR);
169			status = (dbp->seq)(dbp, &key, &data, R_NEXT);
170		}
171	}
172
173	/* Restore the cursor. */
174	t->bt_cursor.rcursor = scursor;
175
176	if (status == RET_ERROR)
177		return (RET_ERROR);
178	if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1)
179		return (RET_ERROR);
180	if (ftruncate(t->bt_rfd, off))
181		return (RET_ERROR);
182	F_CLR(t, R_MODIFIED);
183	return (RET_SUCCESS);
184}
185