rec_close.c revision 1.8
1 /* $NetBSD: rec_close.c,v 1.8 1997/07/13 18:52:10 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1990, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)rec_close.c 8.6 (Berkeley) 8/18/94"; 40 #else 41 __RCSID("$NetBSD: rec_close.c,v 1.8 1997/07/13 18:52:10 christos Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include <sys/types.h> 46 #include <sys/uio.h> 47 #include <sys/mman.h> 48 49 #include <errno.h> 50 #include <limits.h> 51 #include <stdio.h> 52 #include <unistd.h> 53 54 #include <db.h> 55 #include "recno.h" 56 57 /* 58 * __REC_CLOSE -- Close a recno tree. 59 * 60 * Parameters: 61 * dbp: pointer to access method 62 * 63 * Returns: 64 * RET_ERROR, RET_SUCCESS 65 */ 66 int 67 __rec_close(dbp) 68 DB *dbp; 69 { 70 BTREE *t; 71 int status; 72 73 t = dbp->internal; 74 75 /* Toss any page pinned across calls. */ 76 if (t->bt_pinned != NULL) { 77 mpool_put(t->bt_mp, t->bt_pinned, 0); 78 t->bt_pinned = NULL; 79 } 80 81 if (__rec_sync(dbp, 0) == RET_ERROR) 82 return (RET_ERROR); 83 84 /* Committed to closing. */ 85 status = RET_SUCCESS; 86 if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize)) 87 status = RET_ERROR; 88 89 if (!F_ISSET(t, R_INMEM)) 90 if (F_ISSET(t, R_CLOSEFP)) { 91 if (fclose(t->bt_rfp)) 92 status = RET_ERROR; 93 } else 94 if (close(t->bt_rfd)) 95 status = RET_ERROR; 96 97 if (__bt_close(dbp) == RET_ERROR) 98 status = RET_ERROR; 99 100 return (status); 101 } 102 103 /* 104 * __REC_SYNC -- sync the recno tree to disk. 105 * 106 * Parameters: 107 * dbp: pointer to access method 108 * 109 * Returns: 110 * RET_SUCCESS, RET_ERROR. 111 */ 112 int 113 __rec_sync(dbp, flags) 114 const DB *dbp; 115 u_int flags; 116 { 117 struct iovec iov[2]; 118 BTREE *t; 119 DBT data, key; 120 off_t off; 121 recno_t scursor, trec; 122 int status; 123 124 t = dbp->internal; 125 126 /* Toss any page pinned across calls. */ 127 if (t->bt_pinned != NULL) { 128 mpool_put(t->bt_mp, t->bt_pinned, 0); 129 t->bt_pinned = NULL; 130 } 131 132 if (flags == R_RECNOSYNC) 133 return (__bt_sync(dbp, 0)); 134 135 if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED)) 136 return (RET_SUCCESS); 137 138 /* Read any remaining records into the tree. */ 139 if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR) 140 return (RET_ERROR); 141 142 /* Rewind the file descriptor. */ 143 if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0) 144 return (RET_ERROR); 145 146 /* Save the cursor. */ 147 scursor = t->bt_cursor.rcursor; 148 149 key.size = sizeof(recno_t); 150 key.data = &trec; 151 152 if (F_ISSET(t, R_FIXLEN)) { 153 /* 154 * We assume that fixed length records are all fixed length. 155 * Any that aren't are either EINVAL'd or corrected by the 156 * record put code. 157 */ 158 status = (dbp->seq)(dbp, &key, &data, R_FIRST); 159 while (status == RET_SUCCESS) { 160 if (write(t->bt_rfd, data.data, data.size) != data.size) 161 return (RET_ERROR); 162 status = (dbp->seq)(dbp, &key, &data, R_NEXT); 163 } 164 } else { 165 iov[1].iov_base = &t->bt_bval; 166 iov[1].iov_len = 1; 167 168 status = (dbp->seq)(dbp, &key, &data, R_FIRST); 169 while (status == RET_SUCCESS) { 170 iov[0].iov_base = data.data; 171 iov[0].iov_len = data.size; 172 if (writev(t->bt_rfd, iov, 2) != data.size + 1) 173 return (RET_ERROR); 174 status = (dbp->seq)(dbp, &key, &data, R_NEXT); 175 } 176 } 177 178 /* Restore the cursor. */ 179 t->bt_cursor.rcursor = scursor; 180 181 if (status == RET_ERROR) 182 return (RET_ERROR); 183 if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1) 184 return (RET_ERROR); 185 if (ftruncate(t->bt_rfd, off)) 186 return (RET_ERROR); 187 F_CLR(t, R_MODIFIED); 188 return (RET_SUCCESS); 189 } 190
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