source3/groupdb/mapping.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Copyright (C) Andrew Tridgell              1992-2000,
   5  *  Copyright (C) Jean François Micouleau      1998-2001.
   6  *  Copyright (C) Volker Lendecke              2006.
   7  *  Copyright (C) Gerald Carter                2006.
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include "includes.h"
  25 #include "groupdb/mapping.h"
  26
  27 /****************************************************************************
  28 initialise first time the mapping list
  29 ****************************************************************************/
  30 NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum lsa_SidType sid_name_use, const char *nt_name, const char *comment)
  31 {
  32         GROUP_MAP map;
  33
  34         if(!init_group_mapping()) {
  35                 DEBUG(0,("failed to initialize group mapping\n"));
  36                 return NT_STATUS_UNSUCCESSFUL;
  37         }
  38
  39         map.gid=gid;
  40         if (!string_to_sid(&map.sid, sid)) {
  41                 DEBUG(0, ("string_to_sid failed: %s", sid));
  42                 return NT_STATUS_UNSUCCESSFUL;
  43         }
  44
  45         map.sid_name_use=sid_name_use;
  46         fstrcpy(map.nt_name, nt_name);
  47         fstrcpy(map.comment, comment);
  48
  49         return pdb_add_group_mapping_entry(&map);
  50 }
  51
  52 /****************************************************************************
  53  Map a unix group to a newly created mapping
  54 ****************************************************************************/
  55 NTSTATUS map_unix_group(const struct group *grp, GROUP_MAP *pmap)
  56 {
  57         NTSTATUS status;
  58         GROUP_MAP map;
  59         const char *grpname, *dom, *name;
  60         uint32 rid;
  61
  62         if (pdb_getgrgid(&map, grp->gr_gid)) {
  63                 return NT_STATUS_GROUP_EXISTS;
  64         }
  65
  66         map.gid = grp->gr_gid;
  67         grpname = grp->gr_name;
  68
  69         if (lookup_name(tmp_talloc_ctx(), grpname, LOOKUP_NAME_ISOLATED,
  70                         &dom, &name, NULL, NULL)) {
  71
  72                 const char *tmp = talloc_asprintf(
  73                         tmp_talloc_ctx(), "Unix Group %s", grp->gr_name);
  74
  75                 DEBUG(5, ("%s exists as %s\\%s, retrying as \"%s\"\n",
  76                           grpname, dom, name, tmp));
  77                 grpname = tmp;
  78         }
  79
  80         if (lookup_name(tmp_talloc_ctx(), grpname, LOOKUP_NAME_ISOLATED,
  81                         NULL, NULL, NULL, NULL)) {
  82                 DEBUG(3, ("\"%s\" exists, can't map it\n", grp->gr_name));
  83                 return NT_STATUS_GROUP_EXISTS;
  84         }
  85
  86         fstrcpy(map.nt_name, grpname);
  87
  88         if (pdb_rid_algorithm()) {
  89                 rid = algorithmic_pdb_gid_to_group_rid( grp->gr_gid );
  90         } else {
  91                 if (!pdb_new_rid(&rid)) {
  92                         DEBUG(3, ("Could not get a new RID for %s\n",
  93                                   grp->gr_name));
  94                         return NT_STATUS_ACCESS_DENIED;
  95                 }
  96         }
  97
  98         sid_compose(&map.sid, get_global_sam_sid(), rid);
  99         map.sid_name_use = SID_NAME_DOM_GRP;
 100         fstrcpy(map.comment, talloc_asprintf(tmp_talloc_ctx(), "Unix Group %s",
 101                                              grp->gr_name));
 102
 103         status = pdb_add_group_mapping_entry(&map);
 104         if (NT_STATUS_IS_OK(status)) {
 105                 *pmap = map;
 106         }
 107         return status;
 108 }
 109
 110
 111
 112
 113
 114
 115
 116 static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members,
 117                                   DOM_SID **sids, size_t *num)
 118 {
 119         size_t i;
 120
 121         *num = 0;
 122         *sids = NULL;
 123
 124         for (i=0; i<num_members; i++) {
 125                 NTSTATUS status = one_alias_membership(&members[i], sids, num);
 126                 if (!NT_STATUS_IS_OK(status))
 127                         return status;
 128         }
 129         return NT_STATUS_OK;
 130 }
 131
 132 struct aliasmem_closure {
 133         const DOM_SID *alias;
 134         DOM_SID **sids;
 135         size_t *num;
 136 };
 137
 138
 139
 140 /*
 141  *
 142  * High level functions
 143  * better to use them than the lower ones.
 144  *
 145  * we are checking if the group is in the mapping file
 146  * and if the group is an existing unix group
 147  *
 148  */
 149
 150 /* get a domain group from it's SID */
 151
 152 BOOL get_domain_group_from_sid(DOM_SID sid, GROUP_MAP *map)
 153 {
 154         struct group *grp;
 155         BOOL ret;
 156
 157         if(!init_group_mapping()) {
 158                 DEBUG(0,("failed to initialize group mapping\n"));
 159                 return(False);
 160         }
 161
 162         DEBUG(10, ("get_domain_group_from_sid\n"));
 163
 164         /* if the group is NOT in the database, it CAN NOT be a domain group */
 165
 166         become_root();
 167         ret = pdb_getgrsid(map, sid);
 168         unbecome_root();
 169
 170         /* special case check for rid 513 */
 171
 172         if ( !ret ) {
 173                 uint32 rid;
 174
 175                 sid_peek_rid( &sid, &rid );
 176
 177                 if ( rid == DOMAIN_GROUP_RID_USERS ) {
 178                         fstrcpy( map->nt_name, "None" );
 179                         fstrcpy( map->comment, "Ordinary Users" );
 180                         sid_copy( &map->sid, &sid );
 181                         map->sid_name_use = SID_NAME_DOM_GRP;
 182
 183                         return True;
 184                 }
 185
 186                 return False;
 187         }
 188
 189         DEBUG(10, ("get_domain_group_from_sid: SID found in the TDB\n"));
 190
 191         /* if it's not a domain group, continue */
 192         if (map->sid_name_use!=SID_NAME_DOM_GRP) {
 193                 return False;
 194         }
 195
 196         DEBUG(10, ("get_domain_group_from_sid: SID is a domain group\n"));
 197
 198         if (map->gid==-1) {
 199                 return False;
 200         }
 201
 202         DEBUG(10, ("get_domain_group_from_sid: SID is mapped to gid:%lu\n",(unsigned long)map->gid));
 203
 204         grp = getgrgid(map->gid);
 205         if ( !grp ) {
 206                 DEBUG(10, ("get_domain_group_from_sid: gid DOESN'T exist in UNIX security\n"));
 207                 return False;
 208         }
 209
 210         DEBUG(10, ("get_domain_group_from_sid: gid exists in UNIX security\n"));
 211
 212         return True;
 213 }
 214
 215 /****************************************************************************
 216  Create a UNIX group on demand.
 217 ****************************************************************************/
 218
 219 int smb_create_group(const char *unix_group, gid_t *new_gid)
 220 {
 221         pstring add_script;
 222         int     ret = -1;
 223         int     fd = 0;
 224
 225         *new_gid = 0;
 226
 227         /* defer to scripts */
 228
 229         if ( *lp_addgroup_script() ) {
 230                 pstrcpy(add_script, lp_addgroup_script());
 231                 pstring_sub(add_script, "%g", unix_group);
 232                 ret = smbrun(add_script, &fd);
 233                 DEBUG(ret ? 0 : 3,("smb_create_group: Running the command `%s' gave %d\n",add_script,ret));
 234                 if (ret == 0) {
 235                         smb_nscd_flush_group_cache();
 236                 }
 237                 if (ret != 0)
 238                         return ret;
 239
 240                 if (fd != 0) {
 241                         fstring output;
 242
 243                         *new_gid = 0;
 244                         if (read(fd, output, sizeof(output)) > 0) {
 245                                 *new_gid = (gid_t)strtoul(output, NULL, 10);
 246                         }
 247
 248                         close(fd);
 249                 }
 250
 251         }
 252
 253         if (*new_gid == 0) {
 254                 struct group *grp = getgrnam(unix_group);
 255
 256                 if (grp != NULL)
 257                         *new_gid = grp->gr_gid;
 258         }
 259
 260         return ret;
 261 }
 262
 263 /****************************************************************************
 264  Delete a UNIX group on demand.
 265 ****************************************************************************/
 266
 267 int smb_delete_group(const char *unix_group)
 268 {
 269         pstring del_script;
 270         int ret;
 271
 272         /* defer to scripts */
 273
 274         if ( *lp_delgroup_script() ) {
 275                 pstrcpy(del_script, lp_delgroup_script());
 276                 pstring_sub(del_script, "%g", unix_group);
 277                 ret = smbrun(del_script,NULL);
 278                 DEBUG(ret ? 0 : 3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
 279                 if (ret == 0) {
 280                         smb_nscd_flush_group_cache();
 281                 }
 282                 return ret;
 283         }
 284
 285         return -1;
 286 }
 287
 288 /****************************************************************************
 289  Set a user's primary UNIX group.
 290 ****************************************************************************/
 291 int smb_set_primary_group(const char *unix_group, const char* unix_user)
 292 {
 293         pstring add_script;
 294         int ret;
 295
 296         /* defer to scripts */
 297
 298         if ( *lp_setprimarygroup_script() ) {
 299                 pstrcpy(add_script, lp_setprimarygroup_script());
 300                 all_string_sub(add_script, "%g", unix_group, sizeof(add_script));
 301                 all_string_sub(add_script, "%u", unix_user, sizeof(add_script));
 302                 ret = smbrun(add_script,NULL);
 303                 flush_pwnam_cache();
 304                 DEBUG(ret ? 0 : 3,("smb_set_primary_group: "
 305                          "Running the command `%s' gave %d\n",add_script,ret));
 306                 if (ret == 0) {
 307                         smb_nscd_flush_group_cache();
 308                 }
 309                 return ret;
 310         }
 311
 312         return -1;
 313 }
 314
 315 /****************************************************************************
 316  Add a user to a UNIX group.
 317 ****************************************************************************/
 318
 319 int smb_add_user_group(const char *unix_group, const char *unix_user)
 320 {
 321         pstring add_script;
 322         int ret;
 323
 324         /* defer to scripts */
 325
 326         if ( *lp_addusertogroup_script() ) {
 327                 pstrcpy(add_script, lp_addusertogroup_script());
 328                 pstring_sub(add_script, "%g", unix_group);
 329                 pstring_sub(add_script, "%u", unix_user);
 330                 ret = smbrun(add_script,NULL);
 331                 DEBUG(ret ? 0 : 3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
 332                 if (ret == 0) {
 333                         smb_nscd_flush_group_cache();
 334                 }
 335                 return ret;
 336         }
 337
 338         return -1;
 339 }
 340
 341 /****************************************************************************
 342  Delete a user from a UNIX group
 343 ****************************************************************************/
 344
 345 int smb_delete_user_group(const char *unix_group, const char *unix_user)
 346 {
 347         pstring del_script;
 348         int ret;
 349
 350         /* defer to scripts */
 351
 352         if ( *lp_deluserfromgroup_script() ) {
 353                 pstrcpy(del_script, lp_deluserfromgroup_script());
 354                 pstring_sub(del_script, "%g", unix_group);
 355                 pstring_sub(del_script, "%u", unix_user);
 356                 ret = smbrun(del_script,NULL);
 357                 DEBUG(ret ? 0 : 3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
 358                 if (ret == 0) {
 359                         smb_nscd_flush_group_cache();
 360                 }
 361                 return ret;
 362         }
 363
 364         return -1;
 365 }
 366
 367
 368 NTSTATUS pdb_default_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 369                                  DOM_SID sid)
 370 {
 371         return get_group_map_from_sid(sid, map) ?
 372                 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 373 }
 374
 375 NTSTATUS pdb_default_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 376                                  gid_t gid)
 377 {
 378         return get_group_map_from_gid(gid, map) ?
 379                 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 380 }
 381
 382 NTSTATUS pdb_default_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 383                                  const char *name)
 384 {
 385         return get_group_map_from_ntname(name, map) ?
 386                 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 387 }
 388
 389 NTSTATUS pdb_default_add_group_mapping_entry(struct pdb_methods *methods,
 390                                                 GROUP_MAP *map)
 391 {
 392         return add_mapping_entry(map, TDB_INSERT) ?
 393                 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 394 }
 395
 396 NTSTATUS pdb_default_update_group_mapping_entry(struct pdb_methods *methods,
 397                                                    GROUP_MAP *map)
 398 {
 399         return add_mapping_entry(map, TDB_REPLACE) ?
 400                 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 401 }
 402
 403 NTSTATUS pdb_default_delete_group_mapping_entry(struct pdb_methods *methods,
 404                                                    DOM_SID sid)
 405 {
 406         return group_map_remove(&sid) ?
 407                 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 408 }
 409
 410 NTSTATUS pdb_default_enum_group_mapping(struct pdb_methods *methods,
 411                                            const DOM_SID *sid, enum lsa_SidType sid_name_use,
 412                                            GROUP_MAP **pp_rmap, size_t *p_num_entries,
 413                                            BOOL unix_only)
 414 {
 415         return enum_group_mapping(sid, sid_name_use, pp_rmap, p_num_entries, unix_only) ?
 416                 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 417 }
 418
 419 NTSTATUS pdb_default_create_alias(struct pdb_methods *methods,
 420                                   const char *name, uint32 *rid)
 421 {
 422         DOM_SID sid;
 423         enum lsa_SidType type;
 424         uint32 new_rid;
 425         gid_t gid;
 426         BOOL exists;
 427         GROUP_MAP map;
 428         TALLOC_CTX *mem_ctx;
 429         NTSTATUS status;
 430
 431         DEBUG(10, ("Trying to create alias %s\n", name));
 432
 433         mem_ctx = talloc_new(NULL);
 434         if (mem_ctx == NULL) {
 435                 return NT_STATUS_NO_MEMORY;
 436         }
 437
 438         exists = lookup_name(mem_ctx, name, LOOKUP_NAME_ISOLATED,
 439                              NULL, NULL, &sid, &type);
 440         TALLOC_FREE(mem_ctx);
 441
 442         if (exists) {
 443                 return NT_STATUS_ALIAS_EXISTS;
 444         }
 445
 446         if (!winbind_allocate_gid(&gid)) {
 447                 DEBUG(3, ("Could not get a gid out of winbind\n"));
 448                 return NT_STATUS_ACCESS_DENIED;
 449         }
 450
 451         if (!pdb_new_rid(&new_rid)) {
 452                 DEBUG(0, ("Could not allocate a RID -- wasted a gid :-(\n"));
 453                 return NT_STATUS_ACCESS_DENIED;
 454         }
 455
 456         DEBUG(10, ("Creating alias %s with gid %d and rid %d\n",
 457                    name, gid, new_rid));
 458
 459         sid_copy(&sid, get_global_sam_sid());
 460         sid_append_rid(&sid, new_rid);
 461
 462         map.gid = gid;
 463         sid_copy(&map.sid, &sid);
 464         map.sid_name_use = SID_NAME_ALIAS;
 465         fstrcpy(map.nt_name, name);
 466         fstrcpy(map.comment, "");
 467
 468         status = pdb_add_group_mapping_entry(&map);
 469
 470         if (!NT_STATUS_IS_OK(status)) {
 471                 DEBUG(0, ("Could not add group mapping entry for alias %s "
 472                           "(%s)\n", name, nt_errstr(status)));
 473                 return status;
 474         }
 475
 476         *rid = new_rid;
 477
 478         return NT_STATUS_OK;
 479 }
 480
 481 NTSTATUS pdb_default_delete_alias(struct pdb_methods *methods,
 482                                   const DOM_SID *sid)
 483 {
 484         return pdb_delete_group_mapping_entry(*sid);
 485 }
 486
 487 NTSTATUS pdb_default_get_aliasinfo(struct pdb_methods *methods,
 488                                    const DOM_SID *sid,
 489                                    struct acct_info *info)
 490 {
 491         GROUP_MAP map;
 492
 493         if (!pdb_getgrsid(&map, *sid))
 494                 return NT_STATUS_NO_SUCH_ALIAS;
 495
 496         if ((map.sid_name_use != SID_NAME_ALIAS) &&
 497             (map.sid_name_use != SID_NAME_WKN_GRP)) {
 498                 DEBUG(2, ("%s is a %s, expected an alias\n",
 499                           sid_string_static(sid),
 500                           sid_type_lookup(map.sid_name_use)));
 501                 return NT_STATUS_NO_SUCH_ALIAS;
 502         }
 503
 504         fstrcpy(info->acct_name, map.nt_name);
 505         fstrcpy(info->acct_desc, map.comment);
 506         sid_peek_rid(&map.sid, &info->rid);
 507         return NT_STATUS_OK;
 508 }
 509
 510 NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
 511                                    const DOM_SID *sid,
 512                                    struct acct_info *info)
 513 {
 514         GROUP_MAP map;
 515
 516         if (!pdb_getgrsid(&map, *sid))
 517                 return NT_STATUS_NO_SUCH_ALIAS;
 518
 519         fstrcpy(map.nt_name, info->acct_name);
 520         fstrcpy(map.comment, info->acct_desc);
 521
 522         return pdb_update_group_mapping_entry(&map);
 523 }
 524
 525 NTSTATUS pdb_default_add_aliasmem(struct pdb_methods *methods,
 526                                   const DOM_SID *alias, const DOM_SID *member)
 527 {
 528         return add_aliasmem(alias, member);
 529 }
 530
 531 NTSTATUS pdb_default_del_aliasmem(struct pdb_methods *methods,
 532                                   const DOM_SID *alias, const DOM_SID *member)
 533 {
 534         return del_aliasmem(alias, member);
 535 }
 536
 537 NTSTATUS pdb_default_enum_aliasmem(struct pdb_methods *methods,
 538                                    const DOM_SID *alias, DOM_SID **pp_members,
 539                                    size_t *p_num_members)
 540 {
 541         return enum_aliasmem(alias, pp_members, p_num_members);
 542 }
 543
 544 NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
 545                                        TALLOC_CTX *mem_ctx,
 546                                        const DOM_SID *domain_sid,
 547                                        const DOM_SID *members,
 548                                        size_t num_members,
 549                                        uint32 **pp_alias_rids,
 550                                        size_t *p_num_alias_rids)
 551 {
 552         DOM_SID *alias_sids;
 553         size_t i, num_alias_sids;
 554         NTSTATUS result;
 555
 556         alias_sids = NULL;
 557         num_alias_sids = 0;
 558
 559         result = alias_memberships(members, num_members,
 560                                    &alias_sids, &num_alias_sids);
 561
 562         if (!NT_STATUS_IS_OK(result))
 563                 return result;
 564
 565         *p_num_alias_rids = 0;
 566
 567         if (num_alias_sids == 0) {
 568                 TALLOC_FREE(alias_sids);
 569                 return NT_STATUS_OK;
 570         }
 571
 572         *pp_alias_rids = TALLOC_ARRAY(mem_ctx, uint32, num_alias_sids);
 573         if (*pp_alias_rids == NULL)
 574                 return NT_STATUS_NO_MEMORY;
 575
 576         for (i=0; i<num_alias_sids; i++) {
 577                 if (!sid_peek_check_rid(domain_sid, &alias_sids[i],
 578                                         &(*pp_alias_rids)[*p_num_alias_rids]))
 579                         continue;
 580                 *p_num_alias_rids += 1;
 581         }
 582
 583         TALLOC_FREE(alias_sids);
 584
 585         return NT_STATUS_OK;
 586 }
 587
 588 /**********************************************************************
 589  no ops for passdb backends that don't implement group mapping
 590  *********************************************************************/
 591
 592 NTSTATUS pdb_nop_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 593                                  DOM_SID sid)
 594 {
 595         return NT_STATUS_UNSUCCESSFUL;
 596 }
 597
 598 NTSTATUS pdb_nop_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 599                                  gid_t gid)
 600 {
 601         return NT_STATUS_UNSUCCESSFUL;
 602 }
 603
 604 NTSTATUS pdb_nop_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 605                                  const char *name)
 606 {
 607         return NT_STATUS_UNSUCCESSFUL;
 608 }
 609
 610 NTSTATUS pdb_nop_add_group_mapping_entry(struct pdb_methods *methods,
 611                                                 GROUP_MAP *map)
 612 {
 613         return NT_STATUS_UNSUCCESSFUL;
 614 }
 615
 616 NTSTATUS pdb_nop_update_group_mapping_entry(struct pdb_methods *methods,
 617                                                    GROUP_MAP *map)
 618 {
 619         return NT_STATUS_UNSUCCESSFUL;
 620 }
 621
 622 NTSTATUS pdb_nop_delete_group_mapping_entry(struct pdb_methods *methods,
 623                                                    DOM_SID sid)
 624 {
 625         return NT_STATUS_UNSUCCESSFUL;
 626 }
 627
 628 NTSTATUS pdb_nop_enum_group_mapping(struct pdb_methods *methods,
 629                                            enum lsa_SidType sid_name_use,
 630                                            GROUP_MAP **rmap, size_t *num_entries,
 631                                            BOOL unix_only)
 632 {
 633         return NT_STATUS_UNSUCCESSFUL;
 634 }
 635
 636 /****************************************************************************
 637  These need to be redirected through pdb_interface.c
 638 ****************************************************************************/
 639 BOOL pdb_get_dom_grp_info(const DOM_SID *sid, struct acct_info *info)
 640 {
 641         GROUP_MAP map;
 642         BOOL res;
 643
 644         become_root();
 645         res = get_domain_group_from_sid(*sid, &map);
 646         unbecome_root();
 647
 648         if (!res)
 649                 return False;
 650
 651         fstrcpy(info->acct_name, map.nt_name);
 652         fstrcpy(info->acct_desc, map.comment);
 653         sid_peek_rid(sid, &info->rid);
 654         return True;
 655 }
 656
 657 BOOL pdb_set_dom_grp_info(const DOM_SID *sid, const struct acct_info *info)
 658 {
 659         GROUP_MAP map;
 660
 661         if (!get_domain_group_from_sid(*sid, &map))
 662                 return False;
 663
 664         fstrcpy(map.nt_name, info->acct_name);
 665         fstrcpy(map.comment, info->acct_desc);
 666
 667         return NT_STATUS_IS_OK(pdb_update_group_mapping_entry(&map));
 668 }
 669
 670 /********************************************************************
 671  Really just intended to be called by smbd
 672 ********************************************************************/
 673
 674 NTSTATUS pdb_create_builtin_alias(uint32 rid)
 675 {
 676         DOM_SID sid;
 677         enum lsa_SidType type;
 678         gid_t gid;
 679         GROUP_MAP map;
 680         TALLOC_CTX *mem_ctx;
 681         NTSTATUS status;
 682         const char *name = NULL;
 683         fstring groupname;
 684
 685         DEBUG(10, ("Trying to create builtin alias %d\n", rid));
 686
 687         if ( !sid_compose( &sid, &global_sid_Builtin, rid ) ) {
 688                 return NT_STATUS_NO_SUCH_ALIAS;
 689         }
 690
 691         if ( (mem_ctx = talloc_new(NULL)) == NULL ) {
 692                 return NT_STATUS_NO_MEMORY;
 693         }
 694
 695         if ( !lookup_sid(mem_ctx, &sid, NULL, &name, &type) ) {
 696                 TALLOC_FREE( mem_ctx );
 697                 return NT_STATUS_NO_SUCH_ALIAS;
 698         }
 699
 700         /* validate RID so copy the name and move on */
 701
 702         fstrcpy( groupname, name );
 703         TALLOC_FREE( mem_ctx );
 704
 705         if (!winbind_allocate_gid(&gid)) {
 706                 DEBUG(3, ("pdb_create_builtin_alias: Could not get a gid out of winbind\n"));
 707                 return NT_STATUS_ACCESS_DENIED;
 708         }
 709
 710         DEBUG(10,("Creating alias %s with gid %d\n", name, gid));
 711
 712         map.gid = gid;
 713         sid_copy(&map.sid, &sid);
 714         map.sid_name_use = SID_NAME_ALIAS;
 715         fstrcpy(map.nt_name, name);
 716         fstrcpy(map.comment, "");
 717
 718         status = pdb_add_group_mapping_entry(&map);
 719
 720         if (!NT_STATUS_IS_OK(status)) {
 721                 DEBUG(0, ("pdb_create_builtin_alias: Could not add group mapping entry for alias %d "
 722                           "(%s)\n", rid, nt_errstr(status)));
 723         }
 724
 725         return status;
 726 }
 727
 728