ypdb.c revision 1.5
1 /* $NetBSD: ypdb.c,v 1.5 1997/11/01 14:24:54 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Margo Seltzer. 10 * 11 * This code is derived from ndbm module of BSD4.4 db (hash) by 12 * Mats O Jansson 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 31 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 32 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 34 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 */ 42 43 #include <sys/cdefs.h> 44 #ifndef lint 45 __RCSID("$NetBSD: ypdb.c,v 1.5 1997/11/01 14:24:54 lukem Exp $"); 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/types.h> 50 51 #include <db.h> 52 #include <errno.h> 53 #include <stdio.h> 54 #include <string.h> 55 56 #include <rpcsvc/yp.h> 57 58 #include "ypdb.h" 59 60 /* 61 * Returns: 62 * *DBM on success 63 * NULL on failure 64 */ 65 66 DBM * 67 ypdb_open(file, flags, mode) 68 const char *file; 69 int flags, mode; 70 { 71 char path[MAXPATHLEN], *cp; 72 DBM *db; 73 BTREEINFO info; 74 75 cp = strrchr(file, '.'); 76 snprintf(path, sizeof(path), "%s%s", file, 77 (cp != NULL && strcmp(cp, ".db") == 0) ? "" : YPDB_SUFFIX); 78 79 /* try our btree format first */ 80 info.flags = 0; 81 info.cachesize = 0; 82 info.maxkeypage = 0; 83 info.minkeypage = 0; 84 info.psize = 0; 85 info.compare = NULL; 86 info.prefix = NULL; 87 info.lorder = 0; 88 db = (DBM *)dbopen(path, flags, mode, DB_BTREE, (void *)&info); 89 if (db != NULL || errno != EFTYPE) 90 return (db); 91 92 /* fallback to standard hash (for sendmail's aliases.db) */ 93 db = (DBM *)dbopen(path, flags, mode, DB_HASH, NULL); 94 return (db); 95 } 96 97 void 98 ypdb_close(db) 99 DBM *db; 100 { 101 (void)(db->close)(db); 102 } 103 104 /* 105 * Returns: 106 * DATUM on success 107 * NULL on failure 108 */ 109 110 datum 111 ypdb_fetch(db, key) 112 DBM *db; 113 datum key; 114 { 115 datum retval; 116 int status; 117 118 status = (db->get)(db, (DBT *)&key, (DBT *)&retval, 0); 119 if (status) { 120 retval.dptr = NULL; 121 retval.dsize = 0; 122 } 123 return (retval); 124 } 125 126 /* 127 * Returns: 128 * DATUM on success 129 * NULL on failure 130 */ 131 132 datum 133 ypdb_firstkey(db) 134 DBM *db; 135 { 136 int status; 137 datum retdata, retkey; 138 139 status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_FIRST); 140 if (status) 141 retkey.dptr = NULL; 142 return (retkey); 143 } 144 145 /* 146 * Returns: 147 * DATUM on success 148 * NULL on failure 149 */ 150 151 datum 152 ypdb_nextkey(db) 153 DBM *db; 154 { 155 int status; 156 datum retdata, retkey; 157 158 status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_NEXT); 159 if (status) 160 retkey.dptr = NULL; 161 return (retkey); 162 } 163 164 /* 165 * Returns: 166 * DATUM on success 167 * NULL on failure 168 */ 169 170 datum 171 ypdb_setkey(db, key) 172 DBM *db; 173 datum key; 174 { 175 int status; 176 datum retdata; 177 status = (db->seq)(db, (DBT *)&key, (DBT *)&retdata, R_CURSOR); 178 if (status) 179 key.dptr = NULL; 180 return (key); 181 } 182 183 /* 184 * Returns: 185 * 0 on success 186 * <0 failure 187 */ 188 189 int 190 ypdb_delete(db, key) 191 DBM *db; 192 datum key; 193 { 194 int status; 195 196 status = (db->del)(db, (DBT *)&key, 0); 197 if (status) 198 return (-1); 199 else 200 return (0); 201 } 202 203 /* 204 * Returns: 205 * 0 on success 206 * <0 failure 207 * 1 if YPDB_INSERT and entry exists 208 */ 209 210 int 211 ypdb_store(db, key, content, flags) 212 DBM *db; 213 datum key, content; 214 int flags; 215 { 216 if (key.dsize > YPMAXRECORD || content.dsize > YPMAXRECORD) 217 return -1; 218 return ((db->put)(db, (DBT *)&key, (DBT *)&content, 219 (flags == YPDB_INSERT) ? R_NOOVERWRITE : 0)); 220 } 221
Indexes created Wed Oct 22 00:09:40 GMT 2025