1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1995
5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-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 Bill Paul 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 Bill Paul 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 #include <sys/cdefs.h>
36 #include <db.h>
37 #include <errno.h>
38 #include <fcntl.h>
39 #include <limits.h>
40 #include <paths.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45 #include <sys/stat.h>
46 #include <rpcsvc/yp.h>
47 #include "ypxfr_extern.h"
48
49 #define PERM_SECURE (S_IRUSR|S_IWUSR)
50
51 /*
52 * Open a DB database read/write
53 */
54 DB *
yp_open_db_rw(const char * domain,const char * map,const int flags)55 yp_open_db_rw(const char *domain, const char *map, const int flags)
56 {
57 DB *dbp;
58 char buf[1025];
59
60
61 yp_errno = YP_TRUE;
62
63 if (map[0] == '.' || strchr(map, '/')) {
64 yp_errno = YP_BADARGS;
65 return (NULL);
66 }
67
68 #define FLAGS O_RDWR|O_EXLOCK|O_EXCL|O_CREAT
69
70 snprintf(buf, sizeof(buf), "%s/%s/%s", yp_dir, domain, map);
71 dbp = dbopen(buf,flags ? flags : FLAGS,PERM_SECURE,DB_HASH,&openinfo);
72
73 if (dbp == NULL) {
74 switch (errno) {
75 case ENOENT:
76 yp_errno = YP_NOMAP;
77 break;
78 case EFTYPE:
79 yp_errno = YP_BADDB;
80 break;
81 default:
82 yp_errno = YP_YPERR;
83 break;
84 }
85 }
86
87 return (dbp);
88 }
89
90 int
yp_put_record(DB * dbp,DBT * key,DBT * data,int allow_overwrite)91 yp_put_record(DB *dbp, DBT *key, DBT *data, int allow_overwrite)
92 {
93 int rval;
94
95 if ((rval = (dbp->put)(dbp,key,data, allow_overwrite ? 0 :
96 R_NOOVERWRITE))) {
97 switch (rval) {
98 case 1:
99 return(YP_FALSE);
100 break;
101 case -1:
102 default:
103 (void)(dbp->close)(dbp);
104 return(YP_BADDB);
105 break;
106 }
107 }
108
109 return(YP_TRUE);
110 }
111