info_ndbm.c revision 310490 
1/*
2 * Copyright (c) 1997-2014 Erez Zadok
3 * Copyright (c) 1989 Jan-Simon Pendry
4 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1989 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
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 * File: am-utils/amd/info_ndbm.c
37 *
38 */
39
40/*
41 * Get info from NDBM map
42 */
43
44#ifdef HAVE_CONFIG_H
45# include <config.h>
46#endif /* HAVE_CONFIG_H */
47#include <am_defs.h>
48#include <amd.h>
49#include <sun_map.h>
50
51/* forward declarations */
52int ndbm_init(mnt_map *m, char *map, time_t *tp);
53int ndbm_mtime(mnt_map *m, char *map, time_t *tp);
54int ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp);
55
56
57static int
58search_ndbm(mnt_map *m, DBM *db, char *key, char **val)
59{
60  datum k, v;
61
62  k.dptr = key;
63  k.dsize = strlen(key) + 1;
64  v = dbm_fetch(db, k);
65  if (v.dptr) {
66    if (m->cfm && (m->cfm->cfm_flags & CFM_SUN_MAP_SYNTAX))
67      *val = sun_entry2amd(key, v.dptr);
68    else
69      *val = xstrdup(v.dptr);
70    return 0;
71  }
72  return ENOENT;
73}
74
75
76int
77ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
78{
79  DBM *db;
80
81  db = dbm_open(map, O_RDONLY, 0);
82  if (db) {
83    struct stat stb;
84    int error;
85#ifdef DBM_SUFFIX
86    char dbfilename[256];
87
88    xstrlcpy(dbfilename, map, sizeof(dbfilename));
89    xstrlcat(dbfilename, DBM_SUFFIX, sizeof(dbfilename));
90    error = stat(dbfilename, &stb);
91#else /* not DBM_SUFFIX */
92    error = fstat(dbm_pagfno(db), &stb);
93#endif /* not DBM_SUFFIX */
94    if (!error && *tp < stb.st_mtime) {
95      *tp = stb.st_mtime;
96      error = -1;
97    } else {
98      error = search_ndbm(m, db, key, pval);
99    }
100    (void) dbm_close(db);
101    return error;
102  }
103  return errno;
104}
105
106
107int
108ndbm_init(mnt_map *m, char *map, time_t *tp)
109{
110  DBM *db;
111
112  db = dbm_open(map, O_RDONLY, 0);
113  if (db) {
114    struct stat stb;
115    int error;
116#ifdef DBM_SUFFIX
117    char dbfilename[256];
118
119    xstrlcpy(dbfilename, map, sizeof(dbfilename));
120    xstrlcat(dbfilename, DBM_SUFFIX, sizeof(dbfilename));
121    error = stat(dbfilename, &stb);
122#else /* not DBM_SUFFIX */
123    error = fstat(dbm_pagfno(db), &stb);
124#endif /* not DBM_SUFFIX */
125    if (error < 0)
126      *tp = clocktime(NULL);
127    else
128      *tp = stb.st_mtime;
129    dbm_close(db);
130    return 0;
131  }
132  return errno;
133}
134
135
136int
137ndbm_mtime(mnt_map *m, char *map, time_t *tp)
138{
139  return ndbm_init(m,map, tp);
140}
141