source3/nsswitch/winbindd_idmap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Winbind ID Mapping
   4    Copyright (C) Tim Potter 2000
   5    Copyright (C) Anthony Liguori <aliguor@us.ibm.com>   2003
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "winbindd.h"
  23
  24 static struct {
  25   const char *name;
  26   /* Function to create a member of the idmap_methods list */
  27   BOOL (*reg_meth)(struct winbindd_idmap_methods **methods);
  28   struct winbindd_idmap_methods *methods;
  29 } builtin_winbindd_idmap_functions[] = {
  30   { "tdb", winbind_idmap_reg_tdb, NULL },
  31   { "ldap", winbind_idmap_reg_ldap, NULL },
  32   { NULL, NULL, NULL }
  33 };
  34
  35 /* singleton pattern: uberlazy evaluation */
  36 static struct winbindd_idmap_methods *impl;
  37
  38 static struct winbindd_idmap_methods *get_impl(const char *name)
  39 {
  40   int i = 0;
  41   struct winbindd_idmap_methods *ret = NULL;
  42
  43   while (builtin_winbindd_idmap_functions[i].name &&
  44          strcmp(builtin_winbindd_idmap_functions[i].name, name)) {
  45     i++;
  46   }
  47
  48   if (builtin_winbindd_idmap_functions[i].name) {
  49     if (!builtin_winbindd_idmap_functions[i].methods) {
  50       builtin_winbindd_idmap_functions[i].reg_meth(&builtin_winbindd_idmap_functions[i].methods);
  51     }
  52
  53     ret = builtin_winbindd_idmap_functions[i].methods;
  54   }
  55
  56   return ret;
  57 }
  58
  59 /* Initialize backend */
  60 BOOL winbindd_idmap_init(void)
  61 {
  62   BOOL ret = False;
  63
  64   DEBUG(3, ("winbindd_idmap_init: using '%s' as backend\n",
  65             lp_winbind_backend()));
  66
  67   if (!impl) {
  68     impl = get_impl(lp_winbind_backend());
  69     if (!impl) {
  70       DEBUG(0, ("winbindd_idmap_init: could not load backend '%s'\n",
  71                 lp_winbind_backend()));
  72     }
  73   }
  74
  75   if (impl) {
  76     ret = impl->init();
  77   }
  78
  79   DEBUG(3, ("winbind_idmap_init: returning %s\n", ret ? "true" : "false"));
  80
  81   return ret;
  82 }
  83
  84 /* Get UID from SID */
  85 BOOL winbindd_idmap_get_uid_from_sid(DOM_SID *sid, uid_t *uid)
  86 {
  87   BOOL ret = False;
  88
  89   if (!impl) {
  90     impl = get_impl(lp_winbind_backend());
  91     if (!impl) {
  92       DEBUG(0, ("winbindd_idmap_init: could not load backend '%s'\n",
  93                 lp_winbind_backend()));
  94     }
  95   }
  96
  97   if (impl) {
  98     ret = impl->get_uid_from_sid(sid, uid);
  99   }
 100
 101   return ret;
 102 }
 103
 104 /* Get GID from SID */
 105 BOOL winbindd_idmap_get_gid_from_sid(DOM_SID *sid, gid_t *gid)
 106 {
 107   BOOL ret = False;
 108
 109   if (!impl) {
 110     impl = get_impl(lp_winbind_backend());
 111     if (!impl) {
 112       DEBUG(0, ("winbindd_idmap_init: could not load backend '%s'\n",
 113                 lp_winbind_backend()));
 114     }
 115   }
 116
 117   if (impl) {
 118     ret = impl->get_gid_from_sid(sid, gid);
 119   }
 120
 121   return ret;
 122 }
 123
 124 /* Get SID from UID */
 125 BOOL winbindd_idmap_get_sid_from_uid(uid_t uid, DOM_SID *sid)
 126 {
 127   BOOL ret = False;
 128
 129   if (!impl) {
 130     impl = get_impl(lp_winbind_backend());
 131     if (!impl) {
 132       DEBUG(0, ("winbindd_idmap_init: could not load backend '%s'\n",
 133                 lp_winbind_backend()));
 134     }
 135   }
 136
 137   if (impl) {
 138     ret = impl->get_sid_from_uid(uid, sid);
 139   }
 140
 141   return ret;
 142 }
 143
 144 /* Get SID from GID */
 145 BOOL winbindd_idmap_get_sid_from_gid(gid_t gid, DOM_SID *sid)
 146 {
 147   BOOL ret = False;
 148
 149   if (!impl) {
 150     impl = get_impl(lp_winbind_backend());
 151   }
 152
 153   if (impl) {
 154     ret = impl->get_sid_from_gid(gid, sid);
 155   } else {
 156     DEBUG(0, ("winbindd_idmap_init: could not load backend '%s'\n",
 157               lp_winbind_backend()));
 158   }
 159
 160   return ret;
 161 }
 162
 163 /* Close backend */
 164 BOOL winbindd_idmap_close(void)
 165 {
 166   BOOL ret = False;
 167
 168   if (!impl) {
 169     impl = get_impl(lp_winbind_backend());
 170   }
 171
 172   if (impl) {
 173     ret = impl->close();
 174   } else {
 175     DEBUG(0, ("winbindd_idmap_init: could not load backend '%s'\n",
 176               lp_winbind_backend()));
 177   }
 178
 179   return ret;
 180 }
 181
 182 /* Dump backend status */
 183 void winbindd_idmap_status(void)
 184 {
 185   if (!impl) {
 186     impl = get_impl(lp_winbind_backend());
 187   }
 188
 189   if (impl) {
 190     impl->status();
 191   } else {
 192     DEBUG(0, ("winbindd_idmap_init: could not load backend '%s'\n",
 193               lp_winbind_backend()));
 194   }
 195 }