1 /*
2 * Copyright (c) 1989 Jan-Simon Pendry
3 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
4 * Copyright (c) 1989, 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 * Jan-Simon Pendry at Imperial College, London.
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 * from: @(#)info_ndbm.c 8.1 (Berkeley) 6/6/93
35 * $Id: info_ndbm.c,v 1.4 2003/06/02 23:36:51 millert Exp $
36 */
37
38 /*
39 * Get info from NDBM map
40 */
41
42 #include "am.h"
43
44 #ifdef HAS_NDBM_MAPS
45
46 #include <ndbm.h>
47 #include <fcntl.h>
48 #include <sys/stat.h>
49
50 static int
search_ndbm(DBM * db,char * key,char ** val)51 search_ndbm(DBM *db, char *key, char **val)
52 {
53 datum k, v;
54
55 k.dptr = key;
56 k.dsize = strlen(key) + 1;
57 v = dbm_fetch(db, k);
58 if (v.dptr) {
59 *val = strdup(v.dptr);
60 return 0;
61 }
62 return ENOENT;
63 }
64
65 int
ndbm_search(mnt_map * m,char * map,char * key,char ** pval,time_t * tp)66 ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
67 {
68 DBM *db;
69
70 db = dbm_open(map, O_RDONLY, 0);
71 if (db) {
72 struct stat stb;
73 int error;
74
75 error = fstat(dbm_pagfno(db), &stb);
76 if (!error && *tp < stb.st_mtime) {
77 *tp = stb.st_mtime;
78 error = -1;
79 } else {
80 error = search_ndbm(db, key, pval);
81 }
82 (void) dbm_close(db);
83 return error;
84 }
85
86 return errno;
87 }
88
89 int
ndbm_init(char * map,time_t * tp)90 ndbm_init(char *map, time_t *tp)
91 {
92 DBM *db;
93
94 db = dbm_open(map, O_RDONLY, 0);
95 if (db) {
96 struct stat stb;
97
98 if (fstat(dbm_pagfno(db), &stb) < 0)
99 *tp = clocktime();
100 else
101 *tp = stb.st_mtime;
102 dbm_close(db);
103 return 0;
104 }
105
106 return errno;
107 }
108
109 #endif /* HAS_NDBM_MAPS */
110