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ndbm.c revision 1.21 
      1 /*	$NetBSD: ndbm.c,v 1.21 2007/02/03 23:46:09 christos 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 #if defined(LIBC_SCCS) && !defined(lint)
     38 #if 0
     39 static char sccsid[] = "@(#)ndbm.c	8.4 (Berkeley) 7/21/94";
     40 #else
     41 __RCSID("$NetBSD: ndbm.c,v 1.21 2007/02/03 23:46:09 christos Exp $");
     42 #endif
     43 #endif /* LIBC_SCCS and not lint */
     44 
     45 /*
     46  * This package provides a dbm compatible interface to the new hashing
     47  * package described in db(3).
     48  */
     49 #include "namespace.h"
     50 #include <sys/param.h>
     51 
     52 #include <fcntl.h>
     53 #include <stdio.h>
     54 #include <string.h>
     55 
     56 #include <ndbm.h>
     57 #include "hash.h"
     58 
     59 /*
     60  * Returns:
     61  * 	*DBM on success
     62  *	 NULL on failure
     63  */
     64 DBM *
     65 dbm_open(const char *file, int flags, mode_t mode)
     66 {
     67 	HASHINFO info;
     68 	char path[MAXPATHLEN];
     69 
     70 	info.bsize = 4096;
     71 	info.ffactor = 40;
     72 	info.nelem = 1;
     73 	info.cachesize = 0;
     74 	info.hash = NULL;
     75 	info.lorder = 0;
     76 	(void)strncpy(path, file, sizeof(path) - 1);
     77 	(void)strncat(path, DBM_SUFFIX, sizeof(path) - strlen(path) - 1);
     78 	if ((flags & O_ACCMODE) == O_WRONLY) {
     79 		flags &= ~O_WRONLY;
     80 		flags |= O_RDWR;
     81 	}
     82 	return ((DBM *)__hash_open(path, flags, mode, &info, 0));
     83 }
     84 
     85 void
     86 dbm_close(DBM *db)
     87 {
     88 	(void)(db->close)(db);
     89 }
     90 
     91 int
     92 dbm_error(DBM *db)
     93 {
     94 	HTAB *hp;
     95 
     96 	hp = db->internal;
     97 	return (hp->err);
     98 }
     99 
    100 int
    101 dbm_clearerr(DBM *db)
    102 {
    103 	HTAB *hp;
    104 
    105 	hp = db->internal;
    106 	hp->err = 0;
    107 	return (0);
    108 }
    109 
    110 int
    111 dbm_dirfno(DBM *db)
    112 {
    113 	HTAB *hp;
    114 
    115 	hp = db->internal;
    116 	return hp->fp;
    117 }
    118