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ndbm.c revision 1.22 
      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 #include <sys/cdefs.h>
     37 __RCSID("$NetBSD: ndbm.c,v 1.22 2008/09/10 17:52:35 joerg Exp $");
     38 
     39 /*
     40  * This package provides a dbm compatible interface to the new hashing
     41  * package described in db(3).
     42  */
     43 #include "namespace.h"
     44 #include <sys/param.h>
     45 
     46 #include <fcntl.h>
     47 #include <stdio.h>
     48 #include <string.h>
     49 
     50 #include <ndbm.h>
     51 #include "hash.h"
     52 
     53 /*
     54  * Returns:
     55  * 	*DBM on success
     56  *	 NULL on failure
     57  */
     58 DBM *
     59 dbm_open(const char *file, int flags, mode_t mode)
     60 {
     61 	HASHINFO info;
     62 	char path[MAXPATHLEN];
     63 
     64 	info.bsize = 4096;
     65 	info.ffactor = 40;
     66 	info.nelem = 1;
     67 	info.cachesize = 0;
     68 	info.hash = NULL;
     69 	info.lorder = 0;
     70 	(void)strncpy(path, file, sizeof(path) - 1);
     71 	(void)strncat(path, DBM_SUFFIX, sizeof(path) - strlen(path) - 1);
     72 	if ((flags & O_ACCMODE) == O_WRONLY) {
     73 		flags &= ~O_WRONLY;
     74 		flags |= O_RDWR;
     75 	}
     76 	return ((DBM *)__hash_open(path, flags, mode, &info, 0));
     77 }
     78 
     79 void
     80 dbm_close(DBM *db)
     81 {
     82 	(void)(db->close)(db);
     83 }
     84 
     85 int
     86 dbm_error(DBM *db)
     87 {
     88 	HTAB *hp;
     89 
     90 	hp = db->internal;
     91 	return (hp->err);
     92 }
     93 
     94 int
     95 dbm_clearerr(DBM *db)
     96 {
     97 	HTAB *hp;
     98 
     99 	hp = db->internal;
    100 	hp->err = 0;
    101 	return (0);
    102 }
    103 
    104 int
    105 dbm_dirfno(DBM *db)
    106 {
    107 	HTAB *hp;
    108 
    109 	hp = db->internal;
    110 	return hp->fp;
    111 }
    112