external/bsd/am-utils/dist/amd/info_ndbm.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1997-2009 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. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgment:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  *
  41  *
  42  * File: am-utils/amd/info_ndbm.c
  43  *
  44  */
  45
  46 /*
  47  * Get info from NDBM map
  48  */
  49
  50 #ifdef HAVE_CONFIG_H
  51 # include <config.h>
  52 #endif /* HAVE_CONFIG_H */
  53 #include <am_defs.h>
  54 #include <amd.h>
  55 #include <sun_map.h>
  56
  57 /* forward declarations */
  58 int ndbm_init(mnt_map *m, char *map, time_t *tp);
  59 int ndbm_mtime(mnt_map *m, char *map, time_t *tp);
  60 int ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp);
  61
  62
  63 static int
  64 search_ndbm(mnt_map *m, DBM *db, char *key, char **val)
  65 {
  66   datum k, v;
  67
  68   k.dptr = key;
  69   k.dsize = strlen(key) + 1;
  70   v = dbm_fetch(db, k);
  71   if (v.dptr) {
  72     if (m->cfm && (m->cfm->cfm_flags & CFM_SUN_MAP_SYNTAX))
  73       *val = sun_entry2amd(key, v.dptr);
  74     else
  75       *val = strdup(v.dptr);
  76     return 0;
  77   }
  78   return ENOENT;
  79 }
  80
  81
  82 int
  83 ndbm_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
  84 {
  85   DBM *db;
  86
  87   db = dbm_open(map, O_RDONLY, 0);
  88   if (db) {
  89     struct stat stb;
  90     int error;
  91 #ifdef DBM_SUFFIX
  92     char dbfilename[256];
  93
  94     xstrlcpy(dbfilename, map, sizeof(dbfilename));
  95     xstrlcat(dbfilename, DBM_SUFFIX, sizeof(dbfilename));
  96     error = stat(dbfilename, &stb);
  97 #else /* not DBM_SUFFIX */
  98     error = fstat(dbm_pagfno(db), &stb);
  99 #endif /* not DBM_SUFFIX */
 100     if (!error && *tp < stb.st_mtime) {
 101       *tp = stb.st_mtime;
 102       error = -1;
 103     } else {
 104       error = search_ndbm(m, db, key, pval);
 105     }
 106     (void) dbm_close(db);
 107     return error;
 108   }
 109   return errno;
 110 }
 111
 112
 113 int
 114 ndbm_init(mnt_map *m, char *map, time_t *tp)
 115 {
 116   DBM *db;
 117
 118   db = dbm_open(map, O_RDONLY, 0);
 119   if (db) {
 120     struct stat stb;
 121     int error;
 122 #ifdef DBM_SUFFIX
 123     char dbfilename[256];
 124
 125     xstrlcpy(dbfilename, map, sizeof(dbfilename));
 126     xstrlcat(dbfilename, DBM_SUFFIX, sizeof(dbfilename));
 127     error = stat(dbfilename, &stb);
 128 #else /* not DBM_SUFFIX */
 129     error = fstat(dbm_pagfno(db), &stb);
 130 #endif /* not DBM_SUFFIX */
 131     if (error < 0)
 132       *tp = clocktime(NULL);
 133     else
 134       *tp = stb.st_mtime;
 135     dbm_close(db);
 136     return 0;
 137   }
 138   return errno;
 139 }
 140
 141
 142 int
 143 ndbm_mtime(mnt_map *m, char *map, time_t *tp)
 144 {
 145   return ndbm_init(m,map, tp);
 146 }