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      1 /*	$NetBSD: info_ndbm.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997-2014 Erez Zadok
      5  * Copyright (c) 1989 Jan-Simon Pendry
      6  * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
      7  * Copyright (c) 1989 The Regents of the University of California.
      8  * All rights reserved.
      9  *
     10  * This code is derived from software contributed to Berkeley by
     11  * Jan-Simon Pendry at Imperial College, London.
     12  *
     13  * Redistribution and use in source and binary forms, with or without
     14  * modification, are permitted provided that the following conditions
     15  * are met:
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  *
     38  * File: am-utils/amd/info_ndbm.c
     39  *
     40  */
     41 
     42 /*
     43  * Get info from NDBM map
     44  */
     45 
     46 #ifdef HAVE_CONFIG_H
     47 # include <config.h>
     48 #endif /* HAVE_CONFIG_H */
     49 #include <am_defs.h>
     50 #include <amd.h>
     51 #include <sun_map.h>
     52 
     53 /* forward declarations */
     54 int ndbm_init(mnt_map *m, char *map, time_t *tp);
     55 int ndbm_mtime(mnt_map *m, char *map, time_t *tp);
     56 int ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp);
     57 
     58 
     59 static int
     60 search_ndbm(mnt_map *m, DBM *db, char *key, char **val)
     61 {
     62   datum k, v;
     63 
     64   k.dptr = key;
     65   k.dsize = strlen(key) + 1;
     66   v = dbm_fetch(db, k);
     67   if (v.dptr) {
     68     if (m->cfm && (m->cfm->cfm_flags & CFM_SUN_MAP_SYNTAX))
     69       *val = sun_entry2amd(key, v.dptr);
     70     else
     71       *val = xstrdup(v.dptr);
     72     return 0;
     73   }
     74   return ENOENT;
     75 }
     76 
     77 
     78 int
     79 ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
     80 {
     81   DBM *db;
     82 
     83   db = dbm_open(map, O_RDONLY, 0);
     84   if (db) {
     85     struct stat stb;
     86     int error;
     87 #ifdef DBM_SUFFIX
     88     char dbfilename[256];
     89 
     90     xstrlcpy(dbfilename, map, sizeof(dbfilename));
     91     xstrlcat(dbfilename, DBM_SUFFIX, sizeof(dbfilename));
     92     error = stat(dbfilename, &stb);
     93 #else /* not DBM_SUFFIX */
     94     error = fstat(dbm_pagfno(db), &stb);
     95 #endif /* not DBM_SUFFIX */
     96     if (!error && *tp < stb.st_mtime) {
     97       *tp = stb.st_mtime;
     98       error = -1;
     99     } else {
    100       error = search_ndbm(m, db, key, pval);
    101     }
    102     (void) dbm_close(db);
    103     return error;
    104   }
    105   return errno;
    106 }
    107 
    108 
    109 int
    110 ndbm_init(mnt_map *m, char *map, time_t *tp)
    111 {
    112   DBM *db;
    113 
    114   db = dbm_open(map, O_RDONLY, 0);
    115   if (db) {
    116     struct stat stb;
    117     int error;
    118 #ifdef DBM_SUFFIX
    119     char dbfilename[256];
    120 
    121     xstrlcpy(dbfilename, map, sizeof(dbfilename));
    122     xstrlcat(dbfilename, DBM_SUFFIX, sizeof(dbfilename));
    123     error = stat(dbfilename, &stb);
    124 #else /* not DBM_SUFFIX */
    125     error = fstat(dbm_pagfno(db), &stb);
    126 #endif /* not DBM_SUFFIX */
    127     if (error < 0)
    128       *tp = clocktime(NULL);
    129     else
    130       *tp = stb.st_mtime;
    131     dbm_close(db);
    132     return 0;
    133   }
    134   return errno;
    135 }
    136 
    137 
    138 int
    139 ndbm_mtime(mnt_map *m, char *map, time_t *tp)
    140 {
    141   return ndbm_init(m,map, tp);
    142 }
    143