1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Margo Seltzer. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if defined(LIBC_SCCS) && !defined(lint) 36 static char sccsid[] = "@(#)ndbm.c 8.4 (Berkeley) 7/21/94"; 37 #endif /* LIBC_SCCS and not lint */ 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 /* 42 * This package provides a dbm compatible interface to the new hashing 43 * package described in db(3). 44 */ 45 46 #include <sys/param.h> 47 48 #include <stdio.h> 49 #include <string.h> 50 #include <errno.h> 51 52 #include <ndbm.h> 53 #include "hash.h" 54 55 /* 56 * Returns: 57 * *DBM on success 58 * NULL on failure 59 */ 60 extern DBM * 61 dbm_open(const char *file, int flags, mode_t mode) 62 { 63 HASHINFO info; 64 char path[MAXPATHLEN]; 65 66 info.bsize = 4096; 67 info.ffactor = 40; 68 info.nelem = 1; 69 info.cachesize = 0; 70 info.hash = NULL; 71 info.lorder = 0; 72 73 if( strlen(file) >= sizeof(path) - strlen(DBM_SUFFIX)) { 74 errno = ENAMETOOLONG; 75 return(NULL); 76 } 77 (void)strcpy(path, file); 78 (void)strcat(path, DBM_SUFFIX); 79 return ((DBM *)__hash_open(path, flags, mode, &info, 0)); 80 } 81 82 extern void 83 dbm_close(DBM *db) 84 { 85 (void)(db->close)(db); 86 } 87 88 /* 89 * Returns: 90 * DATUM on success 91 * NULL on failure 92 */ 93 extern datum 94 dbm_fetch(DBM *db, datum key) 95 { 96 datum retdata; 97 int status; 98 DBT dbtkey, dbtretdata; 99 100 dbtkey.data = key.dptr; 101 dbtkey.size = key.dsize; 102 status = (db->get)(db, &dbtkey, &dbtretdata, 0); 103 if (status) { 104 dbtretdata.data = NULL; 105 dbtretdata.size = 0; 106 } 107 retdata.dptr = dbtretdata.data; 108 retdata.dsize = dbtretdata.size; 109 return (retdata); 110 } 111 112 /* 113 * Returns: 114 * DATUM on success 115 * NULL on failure 116 */ 117 extern datum 118 dbm_firstkey(DBM *db) 119 { 120 int status; 121 datum retkey; 122 DBT dbtretkey, dbtretdata; 123 124 status = (db->seq)(db, &dbtretkey, &dbtretdata, R_FIRST); 125 if (status) 126 dbtretkey.data = NULL; 127 retkey.dptr = dbtretkey.data; 128 retkey.dsize = dbtretkey.size; 129 return (retkey); 130 } 131 132 /* 133 * Returns: 134 * DATUM on success 135 * NULL on failure 136 */ 137 extern datum 138 dbm_nextkey(DBM *db) 139 { 140 int status; 141 datum retkey; 142 DBT dbtretkey, dbtretdata; 143 144 status = (db->seq)(db, &dbtretkey, &dbtretdata, R_NEXT); 145 if (status) 146 dbtretkey.data = NULL; 147 retkey.dptr = dbtretkey.data; 148 retkey.dsize = dbtretkey.size; 149 return (retkey); 150 } 151 152 /* 153 * Returns: 154 * 0 on success 155 * <0 failure 156 */ 157 extern int 158 dbm_delete(DBM *db, datum key) 159 { 160 int status; 161 DBT dbtkey; 162 163 dbtkey.data = key.dptr; 164 dbtkey.size = key.dsize; 165 status = (db->del)(db, &dbtkey, 0); 166 if (status) 167 return (-1); 168 else 169 return (0); 170 } 171 172 /* 173 * Returns: 174 * 0 on success 175 * <0 failure 176 * 1 if DBM_INSERT and entry exists 177 */ 178 extern int 179 dbm_store(DBM *db, datum key, datum data, int flags) 180 { 181 DBT dbtkey, dbtdata; 182 183 dbtkey.data = key.dptr; 184 dbtkey.size = key.dsize; 185 dbtdata.data = data.dptr; 186 dbtdata.size = data.dsize; 187 return ((db->put)(db, &dbtkey, &dbtdata, 188 (flags == DBM_INSERT) ? R_NOOVERWRITE : 0)); 189 } 190 191 extern int 192 dbm_error(DBM *db) 193 { 194 HTAB *hp; 195 196 hp = (HTAB *)db->internal; 197 return (hp->error); 198 } 199 200 extern int 201 dbm_clearerr(DBM *db) 202 { 203 HTAB *hp; 204 205 hp = (HTAB *)db->internal; 206 hp->error = 0; 207 return (0); 208 } 209 210 extern int 211 dbm_dirfno(DBM *db) 212 { 213 return(((HTAB *)db->internal)->fp); 214 } 215