lib/libc/db/hash/ndbm.c

   1 /*      $NetBSD: ndbm.c,v 1.22 2008/09/10 17:52:35 joerg Exp $  */
   2 /*      from: NetBSD: ndbm.c,v 1.18 2004/04/27 20:03:45 kleink Exp      */
   3
   4 /*-
   5  * Copyright (c) 1990, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Margo Seltzer.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. 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 HAVE_NBTOOL_CONFIG_H
  37 #include "nbtool_config.h"
  38 #endif
  39
  40 #include <sys/cdefs.h>
  41 __RCSID("$NetBSD: ndbm.c,v 1.22 2008/09/10 17:52:35 joerg Exp $");
  42
  43 /*
  44  * This package provides a dbm compatible interface to the new hashing
  45  * package described in db(3).
  46  */
  47 #include "namespace.h"
  48 #include <sys/param.h>
  49
  50 #include <fcntl.h>
  51 #include <stdio.h>
  52 #include <string.h>
  53
  54 #include <ndbm.h>
  55 #include "hash.h"
  56
  57 /*
  58  * Returns:
  59  *      *DBM on success
  60  *       NULL on failure
  61  */
  62 DBM *
  63 dbm_open(const char *file, int flags, mode_t mode)
  64 {
  65         HASHINFO info;
  66         char path[MAXPATHLEN];
  67
  68         info.bsize = 4096;
  69         info.ffactor = 40;
  70         info.nelem = 1;
  71         info.cachesize = 0;
  72         info.hash = NULL;
  73         info.lorder = 0;
  74         (void)strncpy(path, file, sizeof(path) - 1);
  75         (void)strncat(path, DBM_SUFFIX, sizeof(path) - strlen(path) - 1);
  76         if ((flags & O_ACCMODE) == O_WRONLY) {
  77                 flags &= ~O_WRONLY;
  78                 flags |= O_RDWR;
  79         }
  80         return ((DBM *)__hash_open(path, flags, mode, &info, 0));
  81 }
  82
  83 void
  84 dbm_close(DBM *db)
  85 {
  86         (void)(db->close)(db);
  87 }
  88
  89 int
  90 dbm_error(DBM *db)
  91 {
  92         HTAB *hp;
  93
  94         hp = db->internal;
  95         return (hp->err);
  96 }
  97
  98 int
  99 dbm_clearerr(DBM *db)
 100 {
 101         HTAB *hp;
 102
 103         hp = db->internal;
 104         hp->err = 0;
 105         return (0);
 106 }
 107
 108 int
 109 dbm_dirfno(DBM *db)
 110 {
 111         HTAB *hp;
 112
 113         hp = db->internal;
 114         return hp->fp;
 115 }