rec_close.c revision 1.7
1 /* $NetBSD: rec_close.c,v 1.7 1996/05/03 21:38:45 cgd 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 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)rec_close.c 8.6 (Berkeley) 8/18/94"; 39 #else 40 static char rcsid[] = "$NetBSD: rec_close.c,v 1.7 1996/05/03 21:38:45 cgd Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include <sys/types.h> 45 #include <sys/uio.h> 46 #include <sys/mman.h> 47 48 #include <errno.h> 49 #include <limits.h> 50 #include <stdio.h> 51 #include <unistd.h> 52 53 #include <db.h> 54 #include "recno.h" 55 56 /* 57 * __REC_CLOSE -- Close a recno tree. 58 * 59 * Parameters: 60 * dbp: pointer to access method 61 * 62 * Returns: 63 * RET_ERROR, RET_SUCCESS 64 */ 65 int 66 __rec_close(dbp) 67 DB *dbp; 68 { 69 BTREE *t; 70 int status; 71 72 t = dbp->internal; 73 74 /* Toss any page pinned across calls. */ 75 if (t->bt_pinned != NULL) { 76 mpool_put(t->bt_mp, t->bt_pinned, 0); 77 t->bt_pinned = NULL; 78 } 79 80 if (__rec_sync(dbp, 0) == RET_ERROR) 81 return (RET_ERROR); 82 83 /* Committed to closing. */ 84 status = RET_SUCCESS; 85 if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize)) 86 status = RET_ERROR; 87 88 if (!F_ISSET(t, R_INMEM)) 89 if (F_ISSET(t, R_CLOSEFP)) { 90 if (fclose(t->bt_rfp)) 91 status = RET_ERROR; 92 } else 93 if (close(t->bt_rfd)) 94 status = RET_ERROR; 95 96 if (__bt_close(dbp) == RET_ERROR) 97 status = RET_ERROR; 98 99 return (status); 100 } 101 102 /* 103 * __REC_SYNC -- sync the recno tree to disk. 104 * 105 * Parameters: 106 * dbp: pointer to access method 107 * 108 * Returns: 109 * RET_SUCCESS, RET_ERROR. 110 */ 111 int 112 __rec_sync(dbp, flags) 113 const DB *dbp; 114 u_int flags; 115 { 116 struct iovec iov[2]; 117 BTREE *t; 118 DBT data, key; 119 off_t off; 120 recno_t scursor, trec; 121 int status; 122 123 t = dbp->internal; 124 125 /* Toss any page pinned across calls. */ 126 if (t->bt_pinned != NULL) { 127 mpool_put(t->bt_mp, t->bt_pinned, 0); 128 t->bt_pinned = NULL; 129 } 130 131 if (flags == R_RECNOSYNC) 132 return (__bt_sync(dbp, 0)); 133 134 if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED)) 135 return (RET_SUCCESS); 136 137 /* Read any remaining records into the tree. */ 138 if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR) 139 return (RET_ERROR); 140 141 /* Rewind the file descriptor. */ 142 if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0) 143 return (RET_ERROR); 144 145 /* Save the cursor. */ 146 scursor = t->bt_cursor.rcursor; 147 148 key.size = sizeof(recno_t); 149 key.data = &trec; 150 151 if (F_ISSET(t, R_FIXLEN)) { 152 /* 153 * We assume that fixed length records are all fixed length. 154 * Any that aren't are either EINVAL'd or corrected by the 155 * record put code. 156 */ 157 status = (dbp->seq)(dbp, &key, &data, R_FIRST); 158 while (status == RET_SUCCESS) { 159 if (write(t->bt_rfd, data.data, data.size) != data.size) 160 return (RET_ERROR); 161 status = (dbp->seq)(dbp, &key, &data, R_NEXT); 162 } 163 } else { 164 iov[1].iov_base = &t->bt_bval; 165 iov[1].iov_len = 1; 166 167 status = (dbp->seq)(dbp, &key, &data, R_FIRST); 168 while (status == RET_SUCCESS) { 169 iov[0].iov_base = data.data; 170 iov[0].iov_len = data.size; 171 if (writev(t->bt_rfd, iov, 2) != data.size + 1) 172 return (RET_ERROR); 173 status = (dbp->seq)(dbp, &key, &data, R_NEXT); 174 } 175 } 176 177 /* Restore the cursor. */ 178 t->bt_cursor.rcursor = scursor; 179 180 if (status == RET_ERROR) 181 return (RET_ERROR); 182 if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1) 183 return (RET_ERROR); 184 if (ftruncate(t->bt_rfd, off)) 185 return (RET_ERROR); 186 F_CLR(t, R_MODIFIED); 187 return (RET_SUCCESS); 188 } 189
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