lib/ldb/tools/ldbdump.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    simple ldb tdb dump util
   4    Copyright (C) Andrew Tridgell              2001
   5    Copyright (C) Andrew Bartlett              2012
   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 3 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, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "replace.h"
  22 #include "system/locale.h"
  23 #include "system/time.h"
  24 #include "system/filesys.h"
  25 #include "system/wait.h"
  26 #include <tdb.h>
  27 #include <ldb.h>
  28 #include "../ldb_tdb/ldb_tdb.h"
  29
  30 static struct ldb_context *ldb;
  31 bool show_index = false;
  32 bool validate_contents = false;
  33
  34 static int traverse_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
  35 {
  36         int ret, i, j;
  37         struct ldb_dn *dn = state;
  38         struct ldb_message *msg = talloc_zero(NULL, struct ldb_message);
  39         struct ldb_ldif ldif = {
  40                 .msg = msg,
  41                 .changetype = LDB_CHANGETYPE_NONE
  42         };
  43         if (!msg) {
  44                 return -1;
  45         }
  46         ret = ltdb_unpack_data(ldb, &dbuf, msg);
  47         if (ret != 0) {
  48                 fprintf(stderr, "Failed to parse record %*.*s as an LDB record\n", (int)key.dsize, (int)key.dsize, (char *)key.dptr);
  49                 TALLOC_FREE(msg);
  50                 return 0;
  51         }
  52
  53         if (dn && ldb_dn_compare(msg->dn, dn) != 0) {
  54                 TALLOC_FREE(msg);
  55                 return 0;
  56         }
  57
  58         if (!show_index && ldb_dn_is_special(msg->dn)) {
  59                 const char *dn_lin = ldb_dn_get_linearized(msg->dn);
  60                 if ((strcmp(dn_lin, LTDB_BASEINFO) == 0) || (strncmp(dn_lin, LTDB_INDEX ":", strlen( LTDB_INDEX ":")) == 0)) {
  61                         TALLOC_FREE(msg);
  62                         return 0;
  63                 }
  64         }
  65
  66         if (!validate_contents || ldb_dn_is_special(msg->dn)) {
  67                 ldb_ldif_write_file(ldb, stdout, &ldif);
  68                 TALLOC_FREE(msg);
  69                 return 0;
  70         }
  71
  72         for (i=0;i<msg->num_elements;i++) {
  73                 const struct ldb_schema_attribute *a;
  74
  75                 a = ldb_schema_attribute_by_name(ldb, msg->elements[i].name);
  76                 for (j=0;j<msg->elements[i].num_values;j++) {
  77                         struct ldb_val v;
  78                         ret = a->syntax->ldif_write_fn(ldb, msg, &msg->elements[i].values[j], &v);
  79                         if (ret != 0) {
  80                                 v = msg->elements[i].values[j];
  81                                 if (ldb_should_b64_encode(ldb, &v)) {
  82                                         v.data = (uint8_t *)ldb_base64_encode(ldb, (char *)v.data, v.length);
  83                                         v.length = strlen((char *)v.data);
  84                                 }
  85                                 fprintf(stderr, "On %s element %s value %d (%*.*s) failed to convert to LDIF correctly, skipping possibly corrupt record\n",
  86                                         ldb_dn_get_linearized(msg->dn),
  87                                         msg->elements[i].name,
  88                                         j, (int)v.length, (int)v.length,
  89                                         v.data);
  90                                 TALLOC_FREE(msg);
  91                                 return 0;
  92                         }
  93                 }
  94         }
  95         ldb_ldif_write_file(ldb, stdout, &ldif);
  96         TALLOC_FREE(msg);
  97
  98         return 0;
  99 }
 100
 101 static void log_stderr(struct tdb_context *tdb, enum tdb_debug_level level,
 102                        const char *fmt, ...)
 103 {
 104         va_list ap;
 105         const char *name = tdb_name(tdb);
 106         const char *prefix = "";
 107
 108         if (!name)
 109                 name = "unnamed";
 110
 111         switch (level) {
 112         case TDB_DEBUG_ERROR:
 113                 prefix = "ERROR: ";
 114                 break;
 115         case TDB_DEBUG_WARNING:
 116                 prefix = "WARNING: ";
 117                 break;
 118         case TDB_DEBUG_TRACE:
 119                 return;
 120
 121         default:
 122         case TDB_DEBUG_FATAL:
 123                 prefix = "FATAL: ";
 124                 break;
 125         }
 126
 127         va_start(ap, fmt);
 128         fprintf(stderr, "tdb(%s): %s", name, prefix);
 129         vfprintf(stderr, fmt, ap);
 130         va_end(ap);
 131 }
 132
 133 static void emergency_walk(TDB_DATA key, TDB_DATA dbuf, void *keyname)
 134 {
 135         traverse_fn(NULL, key, dbuf, keyname);
 136 }
 137
 138 static int dump_tdb(const char *fname, struct ldb_dn *dn, bool emergency)
 139 {
 140         TDB_CONTEXT *tdb;
 141         struct tdb_logging_context logfn = { log_stderr };
 142
 143         tdb = tdb_open_ex(fname, 0, 0, O_RDONLY, 0, &logfn, NULL);
 144         if (!tdb) {
 145                 fprintf(stderr, "Failed to open %s\n", fname);
 146                 return 1;
 147         }
 148
 149         if (emergency) {
 150                 return tdb_rescue(tdb, emergency_walk, dn) == 0;
 151         }
 152         return tdb_traverse(tdb, traverse_fn, dn) == -1 ? 1 : 0;
 153 }
 154
 155 static void usage( void)
 156 {
 157         printf( "Usage: tdbdump [options] <filename>\n\n");
 158         printf( "   -h          this help message\n");
 159         printf( "   -d DN       dumps DN only\n");
 160         printf( "   -e          emergency dump, for corrupt databases\n");
 161         printf( "   -i          include index and @BASEINFO records in dump\n");
 162         printf( "   -c          validate contents of the records\n");
 163 }
 164
 165  int main(int argc, char *argv[])
 166 {
 167         bool emergency = false;
 168         int c, rc;
 169         char *fname;
 170         struct ldb_dn *dn = NULL;
 171
 172         ldb = ldb_init(NULL, NULL);
 173         if (ldb == NULL) {
 174                 fprintf(stderr, "ldb: ldb_init failed()");
 175                 exit(1);
 176         }
 177
 178         rc = ldb_modules_hook(ldb, LDB_MODULE_HOOK_CMDLINE_PRECONNECT);
 179         if (rc != LDB_SUCCESS) {
 180                 fprintf(stderr, "ldb: failed to run preconnect hooks (needed to get Samba LDIF handlers): %s\n", ldb_strerror(rc));
 181                 exit(1);
 182         }
 183
 184         if (argc < 2) {
 185                 printf("Usage: ldbdump <fname>\n");
 186                 exit(1);
 187         }
 188
 189         while ((c = getopt( argc, argv, "hd:ec")) != -1) {
 190                 switch (c) {
 191                 case 'h':
 192                         usage();
 193                         exit( 0);
 194                 case 'd':
 195                         dn = ldb_dn_new(ldb, ldb, optarg);
 196                         if (!dn) {
 197                                 fprintf(stderr, "ldb failed to parse %s as a DN\n", optarg);
 198                                 exit(1);
 199                         }
 200                         break;
 201                 case 'e':
 202                         emergency = true;
 203                         break;
 204                 case 'i':
 205                         show_index = true;
 206                         break;
 207                 case 'c':
 208                         validate_contents = true;
 209                         break;
 210                 default:
 211                         usage();
 212                         exit( 1);
 213                 }
 214         }
 215
 216         fname = argv[optind];
 217
 218         return dump_tdb(fname, dn, emergency);
 219 }