source4/lib/ldb/tools/ldbedit.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Andrew Tridgell  2004
   5
   6      ** NOTE! The following LGPL license applies to the ldb
   7      ** library. This does NOT imply that all of Samba is released
   8      ** under the LGPL
   9
  10    This library is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU Lesser General Public
  12    License as published by the Free Software Foundation; either
  13    version 3 of the License, or (at your option) any later version.
  14
  15    This library is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    Lesser General Public License for more details.
  19
  20    You should have received a copy of the GNU Lesser General Public
  21    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 /*
  25  *  Name: ldb
  26  *
  27  *  Component: ldbedit
  28  *
  29  *  Description: utility for ldb database editing
  30  *
  31  *  Author: Andrew Tridgell
  32  */
  33
  34 #include "ldb.h"
  35 #include "tools/cmdline.h"
  36
  37 static struct ldb_cmdline *options;
  38
  39 /*
  40   debug routine
  41 */
  42 static void ldif_write_msg(struct ldb_context *ldb,
  43                            FILE *f,
  44                            enum ldb_changetype changetype,
  45                            struct ldb_message *msg)
  46 {
  47         struct ldb_ldif ldif;
  48         ldif.changetype = changetype;
  49         ldif.msg = msg;
  50         ldb_ldif_write_file(ldb, f, &ldif);
  51 }
  52
  53 /*
  54   modify a database record so msg1 becomes msg2
  55   returns the number of modified elements
  56 */
  57 static int modify_record(struct ldb_context *ldb,
  58                          struct ldb_message *msg1,
  59                          struct ldb_message *msg2)
  60 {
  61         struct ldb_message *mod;
  62
  63         mod = ldb_msg_diff(ldb, msg1, msg2);
  64         if (mod == NULL) {
  65                 fprintf(stderr, "Failed to calculate message differences\n");
  66                 return -1;
  67         }
  68
  69         if (mod->num_elements == 0) {
  70                 return 0;
  71         }
  72
  73         if (options->verbose > 0) {
  74                 ldif_write_msg(ldb, stdout, LDB_CHANGETYPE_MODIFY, mod);
  75         }
  76
  77         if (ldb_modify(ldb, mod) != 0) {
  78                 fprintf(stderr, "failed to modify %s - %s\n",
  79                         ldb_dn_get_linearized(msg1->dn), ldb_errstring(ldb));
  80                 return -1;
  81         }
  82
  83         return mod->num_elements;
  84 }
  85
  86 /*
  87   find dn in msgs[]
  88 */
  89 static struct ldb_message *msg_find(struct ldb_context *ldb,
  90                                     struct ldb_message **msgs,
  91                                     int count,
  92                                     struct ldb_dn *dn)
  93 {
  94         int i;
  95         for (i=0;i<count;i++) {
  96                 if (ldb_dn_compare(dn, msgs[i]->dn) == 0) {
  97                         return msgs[i];
  98                 }
  99         }
 100         return NULL;
 101 }
 102
 103 /*
 104   merge the changes in msgs2 into the messages from msgs1
 105 */
 106 static int merge_edits(struct ldb_context *ldb,
 107                        struct ldb_message **msgs1, int count1,
 108                        struct ldb_message **msgs2, int count2)
 109 {
 110         int i;
 111         struct ldb_message *msg;
 112         int ret = 0;
 113         int adds=0, modifies=0, deletes=0;
 114
 115         if (ldb_transaction_start(ldb) != 0) {
 116                 fprintf(stderr, "Failed to start transaction: %s\n", ldb_errstring(ldb));
 117                 return -1;
 118         }
 119
 120         /* do the adds and modifies */
 121         for (i=0;i<count2;i++) {
 122                 msg = msg_find(ldb, msgs1, count1, msgs2[i]->dn);
 123                 if (!msg) {
 124                         if (options->verbose > 0) {
 125                                 ldif_write_msg(ldb, stdout, LDB_CHANGETYPE_ADD, msgs2[i]);
 126                         }
 127                         if (ldb_add(ldb, msgs2[i]) != 0) {
 128                                 fprintf(stderr, "failed to add %s - %s\n",
 129                                         ldb_dn_get_linearized(msgs2[i]->dn),
 130                                         ldb_errstring(ldb));
 131                                 return -1;
 132                         }
 133                         adds++;
 134                 } else {
 135                         if (modify_record(ldb, msg, msgs2[i]) > 0) {
 136                                 modifies++;
 137                         }
 138                 }
 139         }
 140
 141         /* do the deletes */
 142         for (i=0;i<count1;i++) {
 143                 msg = msg_find(ldb, msgs2, count2, msgs1[i]->dn);
 144                 if (!msg) {
 145                         if (options->verbose > 0) {
 146                                 ldif_write_msg(ldb, stdout, LDB_CHANGETYPE_DELETE, msgs1[i]);
 147                         }
 148                         if (ldb_delete(ldb, msgs1[i]->dn) != 0) {
 149                                 fprintf(stderr, "failed to delete %s - %s\n",
 150                                         ldb_dn_get_linearized(msgs1[i]->dn),
 151                                         ldb_errstring(ldb));
 152                                 return -1;
 153                         }
 154                         deletes++;
 155                 }
 156         }
 157
 158         if (ldb_transaction_commit(ldb) != 0) {
 159                 fprintf(stderr, "Failed to commit transaction: %s\n", ldb_errstring(ldb));
 160                 return -1;
 161         }
 162
 163         printf("# %d adds  %d modifies  %d deletes\n", adds, modifies, deletes);
 164
 165         return ret;
 166 }
 167
 168 /*
 169   save a set of messages as ldif to a file
 170 */
 171 static int save_ldif(struct ldb_context *ldb,
 172                      FILE *f, struct ldb_message **msgs, int count)
 173 {
 174         int i;
 175
 176         fprintf(f, "# editing %d records\n", count);
 177
 178         for (i=0;i<count;i++) {
 179                 struct ldb_ldif ldif;
 180                 fprintf(f, "# record %d\n", i+1);
 181
 182                 ldif.changetype = LDB_CHANGETYPE_NONE;
 183                 ldif.msg = msgs[i];
 184
 185                 ldb_ldif_write_file(ldb, f, &ldif);
 186         }
 187
 188         return 0;
 189 }
 190
 191
 192 /*
 193   edit the ldb search results in msgs using the user selected editor
 194 */
 195 static int do_edit(struct ldb_context *ldb, struct ldb_message **msgs1, int count1,
 196                    const char *editor)
 197 {
 198         int fd, ret;
 199         FILE *f;
 200         char file_template[] = "/tmp/ldbedit.XXXXXX";
 201         char *cmd;
 202         struct ldb_ldif *ldif;
 203         struct ldb_message **msgs2 = NULL;
 204         int count2 = 0;
 205
 206         /* write out the original set of messages to a temporary
 207            file */
 208         fd = mkstemp(file_template);
 209
 210         if (fd == -1) {
 211                 perror(file_template);
 212                 return -1;
 213         }
 214
 215         f = fdopen(fd, "r+");
 216
 217         if (!f) {
 218                 perror("fopen");
 219                 close(fd);
 220                 unlink(file_template);
 221                 return -1;
 222         }
 223
 224         if (save_ldif(ldb, f, msgs1, count1) != 0) {
 225                 return -1;
 226         }
 227
 228         fclose(f);
 229
 230         cmd = talloc_asprintf(ldb, "%s %s", editor, file_template);
 231
 232         if (!cmd) {
 233                 unlink(file_template);
 234                 fprintf(stderr, "out of memory\n");
 235                 return -1;
 236         }
 237
 238         /* run the editor */
 239         ret = system(cmd);
 240         talloc_free(cmd);
 241
 242         if (ret != 0) {
 243                 unlink(file_template);
 244                 fprintf(stderr, "edit with %s failed\n", editor);
 245                 return -1;
 246         }
 247
 248         /* read the resulting ldif into msgs2 */
 249         f = fopen(file_template, "r");
 250         if (!f) {
 251                 perror(file_template);
 252                 return -1;
 253         }
 254
 255         while ((ldif = ldb_ldif_read_file(ldb, f))) {
 256                 msgs2 = talloc_realloc(ldb, msgs2, struct ldb_message *, count2+1);
 257                 if (!msgs2) {
 258                         fprintf(stderr, "out of memory");
 259                         return -1;
 260                 }
 261                 msgs2[count2++] = ldif->msg;
 262         }
 263
 264         fclose(f);
 265         unlink(file_template);
 266
 267         return merge_edits(ldb, msgs1, count1, msgs2, count2);
 268 }
 269
 270 static void usage(void)
 271 {
 272         printf("Usage: ldbedit <options> <expression> <attributes ...>\n");
 273         printf("Options:\n");
 274         printf("  -H ldb_url       choose the database (or $LDB_URL)\n");
 275         printf("  -s base|sub|one  choose search scope\n");
 276         printf("  -b basedn        choose baseDN\n");
 277         printf("  -a               edit all records (expression 'objectclass=*')\n");
 278         printf("  -e editor        choose editor (or $VISUAL or $EDITOR)\n");
 279         printf("  -v               verbose mode\n");
 280         exit(1);
 281 }
 282
 283 int main(int argc, const char **argv)
 284 {
 285         struct ldb_context *ldb;
 286         struct ldb_result *result = NULL;
 287         struct ldb_dn *basedn = NULL;
 288         int ret;
 289         const char *expression = "(|(objectClass=*)(distinguishedName=*))";
 290         const char * const * attrs = NULL;
 291
 292         ldb = ldb_init(NULL, NULL);
 293
 294         options = ldb_cmdline_process(ldb, argc, argv, usage);
 295
 296         /* the check for '=' is for compatibility with ldapsearch */
 297         if (options->argc > 0 &&
 298             strchr(options->argv[0], '=')) {
 299                 expression = options->argv[0];
 300                 options->argv++;
 301                 options->argc--;
 302         }
 303
 304         if (options->argc > 0) {
 305                 attrs = (const char * const *)(options->argv);
 306         }
 307
 308         if (options->basedn != NULL) {
 309                 basedn = ldb_dn_new(ldb, ldb, options->basedn);
 310                 if ( ! ldb_dn_validate(basedn)) {
 311                         printf("Invalid Base DN format\n");
 312                         exit(1);
 313                 }
 314         }
 315
 316         ret = ldb_search(ldb, ldb, &result, basedn, options->scope, attrs, "%s", expression);
 317         if (ret != LDB_SUCCESS) {
 318                 printf("search failed - %s\n", ldb_errstring(ldb));
 319                 exit(1);
 320         }
 321
 322         if (result->count == 0) {
 323                 printf("no matching records - cannot edit\n");
 324                 return 0;
 325         }
 326
 327         do_edit(ldb, result->msgs, result->count, options->editor);
 328
 329         if (result) {
 330                 ret = talloc_free(result);
 331                 if (ret == -1) {
 332                         fprintf(stderr, "talloc_free failed\n");
 333                         exit(1);
 334                 }
 335         }
 336
 337         talloc_free(ldb);
 338         return 0;
 339 }