info_ndbm.c revision 42629 
1/*
2 * Copyright (c) 1997-1998 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. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgment:
21 *      This product includes software developed by the University of
22 *      California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 *      %W% (Berkeley) %G%
40 *
41 * $Id: info_ndbm.c,v 1.1.1.1 1998/11/05 02:04:49 ezk Exp $
42 *
43 */
44
45/*
46 * Get info from NDBM map
47 */
48
49#ifdef HAVE_CONFIG_H
50# include <config.h>
51#endif /* HAVE_CONFIG_H */
52#include <am_defs.h>
53#include <amd.h>
54
55/* forward declarations */
56int ndbm_init(mnt_map *m, char *map, time_t *tp);
57int ndbm_mtime(mnt_map *m, char *map, time_t *tp);
58int ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp);
59
60
61static int
62search_ndbm(DBM *db, char *key, char **val)
63{
64  datum k, v;
65
66  k.dptr = key;
67  k.dsize = strlen(key) + 1;
68  v = dbm_fetch(db, k);
69  if (v.dptr) {
70    *val = strdup(v.dptr);
71    return 0;
72  }
73  return ENOENT;
74}
75
76
77int
78ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
79{
80  DBM *db;
81
82  db = dbm_open(map, O_RDONLY, 0);
83  if (db) {
84    struct stat stb;
85    int error;
86#ifdef DBM_SUFFIX
87    char dbfilename[256];
88
89    strcpy(dbfilename, map);
90    strcat(dbfilename, DBM_SUFFIX);
91    error = stat(dbfilename, &stb);
92#else /* not DBM_SUFFIX */
93    error = fstat(dbm_pagfno(db), &stb);
94#endif /* not DBM_SUFFIX */
95    if (!error && *tp < stb.st_mtime) {
96      *tp = stb.st_mtime;
97      error = -1;
98    } else {
99      error = search_ndbm(db, key, pval);
100    }
101    (void) dbm_close(db);
102    return error;
103  }
104  return errno;
105}
106
107
108int
109ndbm_init(mnt_map *m, char *map, time_t *tp)
110{
111  DBM *db;
112
113  db = dbm_open(map, O_RDONLY, 0);
114  if (db) {
115    struct stat stb;
116    int error;
117#ifdef DBM_SUFFIX
118    char dbfilename[256];
119
120    strcpy(dbfilename, map);
121    strcat(dbfilename, DBM_SUFFIX);
122    error = stat(dbfilename, &stb);
123#else /* not DBM_SUFFIX */
124    error = fstat(dbm_pagfno(db), &stb);
125#endif /* not DBM_SUFFIX */
126    if (error < 0)
127      *tp = clocktime();
128    else
129      *tp = stb.st_mtime;
130    dbm_close(db);
131    return 0;
132  }
133  return errno;
134}
135
136
137int
138ndbm_mtime(mnt_map *m, char *map, time_t *tp)
139{
140  return ndbm_init(m,map, tp);
141}
142