source3/utils/sharesec.c

   1 /*
   2  *  Unix SMB/Netbios implementation.
   3  *  Utility for managing share permissions
   4  *
   5  *  Copyright (C) Tim Potter                    2000
   6  *  Copyright (C) Jeremy Allison                2000
   7  *  Copyright (C) Jelmer Vernooij               2003
   8  *  Copyright (C) Gerald (Jerry) Carter         2005.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 3 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program 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
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24
  25 #include "includes.h"
  26 #include "popt_common.h"
  27 #include "../libcli/security/security.h"
  28 #include "passdb/machine_sid.h"
  29
  30 static TALLOC_CTX *ctx;
  31
  32 enum acl_mode { SMB_ACL_DELETE,
  33                 SMB_ACL_MODIFY,
  34                 SMB_ACL_ADD,
  35                 SMB_ACL_SET,
  36                 SMB_SD_DELETE,
  37                 SMB_SD_SETSDDL,
  38                 SMB_SD_VIEWSDDL,
  39                 SMB_ACL_VIEW };
  40
  41 struct perm_value {
  42         const char *perm;
  43         uint32 mask;
  44 };
  45
  46 /* These values discovered by inspection */
  47
  48 static const struct perm_value special_values[] = {
  49         { "R", SEC_RIGHTS_FILE_READ },
  50         { "W", SEC_RIGHTS_FILE_WRITE },
  51         { "X", SEC_RIGHTS_FILE_EXECUTE },
  52         { "D", SEC_STD_DELETE },
  53         { "P", SEC_STD_WRITE_DAC },
  54         { "O", SEC_STD_WRITE_OWNER },
  55         { NULL, 0 },
  56 };
  57
  58 #define SEC_RIGHTS_DIR_CHANGE ( SEC_RIGHTS_DIR_READ|SEC_STD_DELETE|\
  59                                 SEC_RIGHTS_DIR_WRITE|SEC_DIR_TRAVERSE )
  60
  61 static const struct perm_value standard_values[] = {
  62         { "READ",   SEC_RIGHTS_DIR_READ|SEC_DIR_TRAVERSE },
  63         { "CHANGE", SEC_RIGHTS_DIR_CHANGE },
  64         { "FULL",   SEC_RIGHTS_DIR_ALL },
  65         { NULL, 0 },
  66 };
  67
  68 /********************************************************************
  69  print an ACE on a FILE
  70 ********************************************************************/
  71
  72 static void print_ace(FILE *f, struct security_ace *ace)
  73 {
  74         const struct perm_value *v;
  75         int do_print = 0;
  76         uint32 got_mask;
  77
  78         fprintf(f, "%s:", sid_string_tos(&ace->trustee));
  79
  80         /* Ace type */
  81
  82         if (ace->type == SEC_ACE_TYPE_ACCESS_ALLOWED) {
  83                 fprintf(f, "ALLOWED");
  84         } else if (ace->type == SEC_ACE_TYPE_ACCESS_DENIED) {
  85                 fprintf(f, "DENIED");
  86         } else {
  87                 fprintf(f, "%d", ace->type);
  88         }
  89
  90         /* Not sure what flags can be set in a file ACL */
  91
  92         fprintf(f, "/%d/", ace->flags);
  93
  94         /* Standard permissions */
  95
  96         for (v = standard_values; v->perm; v++) {
  97                 if (ace->access_mask == v->mask) {
  98                         fprintf(f, "%s", v->perm);
  99                         return;
 100                 }
 101         }
 102
 103         /* Special permissions.  Print out a hex value if we have
 104            leftover bits in the mask. */
 105
 106         got_mask = ace->access_mask;
 107
 108  again:
 109         for (v = special_values; v->perm; v++) {
 110                 if ((ace->access_mask & v->mask) == v->mask) {
 111                         if (do_print) {
 112                                 fprintf(f, "%s", v->perm);
 113                         }
 114                         got_mask &= ~v->mask;
 115                 }
 116         }
 117
 118         if (!do_print) {
 119                 if (got_mask != 0) {
 120                         fprintf(f, "0x%08x", ace->access_mask);
 121                 } else {
 122                         do_print = 1;
 123                         goto again;
 124                 }
 125         }
 126 }
 127
 128 /********************************************************************
 129  print an ascii version of a security descriptor on a FILE handle
 130 ********************************************************************/
 131
 132 static void sec_desc_print(FILE *f, struct security_descriptor *sd)
 133 {
 134         uint32 i;
 135
 136         fprintf(f, "REVISION:%d\n", sd->revision);
 137
 138         /* Print owner and group sid */
 139
 140         fprintf(f, "OWNER:%s\n", sid_string_tos(sd->owner_sid));
 141
 142         fprintf(f, "GROUP:%s\n", sid_string_tos(sd->group_sid));
 143
 144         /* Print aces */
 145         for (i = 0; sd->dacl && i < sd->dacl->num_aces; i++) {
 146                 struct security_ace *ace = &sd->dacl->aces[i];
 147                 fprintf(f, "ACL:");
 148                 print_ace(f, ace);
 149                 fprintf(f, "\n");
 150         }
 151 }
 152
 153 /********************************************************************
 154  parse an ACE in the same format as print_ace()
 155 ********************************************************************/
 156
 157 static bool parse_ace(struct security_ace *ace, const char *orig_str)
 158 {
 159         char *p;
 160         const char *cp;
 161         char *tok;
 162         unsigned int atype = 0;
 163         unsigned int aflags = 0;
 164         unsigned int amask = 0;
 165         struct dom_sid sid;
 166         uint32_t mask;
 167         const struct perm_value *v;
 168         char *str = SMB_STRDUP(orig_str);
 169         TALLOC_CTX *frame = talloc_stackframe();
 170
 171         if (!str) {
 172                 TALLOC_FREE(frame);
 173                 return False;
 174         }
 175
 176         ZERO_STRUCTP(ace);
 177         p = strchr_m(str,':');
 178         if (!p) {
 179                 fprintf(stderr, "ACE '%s': missing ':'.\n", orig_str);
 180                 SAFE_FREE(str);
 181                 TALLOC_FREE(frame);
 182                 return False;
 183         }
 184         *p = '\0';
 185         p++;
 186         /* Try to parse numeric form */
 187
 188         if (sscanf(p, "%i/%i/%i", &atype, &aflags, &amask) == 3 &&
 189             string_to_sid(&sid, str)) {
 190                 goto done;
 191         }
 192
 193         /* Try to parse text form */
 194
 195         if (!string_to_sid(&sid, str)) {
 196                 fprintf(stderr, "ACE '%s': failed to convert '%s' to SID\n",
 197                         orig_str, str);
 198                 SAFE_FREE(str);
 199                 TALLOC_FREE(frame);
 200                 return False;
 201         }
 202
 203         cp = p;
 204         if (!next_token_talloc(frame, &cp, &tok, "/")) {
 205                 fprintf(stderr, "ACE '%s': failed to find '/' character.\n",
 206                         orig_str);
 207                 SAFE_FREE(str);
 208                 TALLOC_FREE(frame);
 209                 return False;
 210         }
 211
 212         if (strncmp(tok, "ALLOWED", strlen("ALLOWED")) == 0) {
 213                 atype = SEC_ACE_TYPE_ACCESS_ALLOWED;
 214         } else if (strncmp(tok, "DENIED", strlen("DENIED")) == 0) {
 215                 atype = SEC_ACE_TYPE_ACCESS_DENIED;
 216         } else {
 217                 fprintf(stderr, "ACE '%s': missing 'ALLOWED' or 'DENIED' "
 218                         "entry at '%s'\n", orig_str, tok);
 219                 SAFE_FREE(str);
 220                 TALLOC_FREE(frame);
 221                 return False;
 222         }
 223
 224         /* Only numeric form accepted for flags at present */
 225         /* no flags on share permissions */
 226
 227         if (!(next_token_talloc(frame, &cp, &tok, "/") &&
 228               sscanf(tok, "%i", &aflags) && aflags == 0)) {
 229                 fprintf(stderr, "ACE '%s': bad integer flags entry at '%s'\n",
 230                         orig_str, tok);
 231                 SAFE_FREE(str);
 232                 TALLOC_FREE(frame);
 233                 return False;
 234         }
 235
 236         if (!next_token_talloc(frame, &cp, &tok, "/")) {
 237                 fprintf(stderr, "ACE '%s': missing / at '%s'\n",
 238                         orig_str, tok);
 239                 SAFE_FREE(str);
 240                 TALLOC_FREE(frame);
 241                 return False;
 242         }
 243
 244         if (strncmp(tok, "0x", 2) == 0) {
 245                 if (sscanf(tok, "%i", &amask) != 1) {
 246                         fprintf(stderr, "ACE '%s': bad hex number at '%s'\n",
 247                                 orig_str, tok);
 248                         TALLOC_FREE(frame);
 249                         SAFE_FREE(str);
 250                         return False;
 251                 }
 252                 goto done;
 253         }
 254
 255         for (v = standard_values; v->perm; v++) {
 256                 if (strcmp(tok, v->perm) == 0) {
 257                         amask = v->mask;
 258                         goto done;
 259                 }
 260         }
 261
 262         p = tok;
 263
 264         while(*p) {
 265                 bool found = False;
 266
 267                 for (v = special_values; v->perm; v++) {
 268                         if (v->perm[0] == *p) {
 269                                 amask |= v->mask;
 270                                 found = True;
 271                         }
 272                 }
 273
 274                 if (!found) {
 275                         fprintf(stderr, "ACE '%s': bad permission value at "
 276                                 "'%s'\n", orig_str, p);
 277                         TALLOC_FREE(frame);
 278                         SAFE_FREE(str);
 279                         return False;
 280                 }
 281                 p++;
 282         }
 283
 284         if (*p) {
 285                 TALLOC_FREE(frame);
 286                 SAFE_FREE(str);
 287                 return False;
 288         }
 289
 290  done:
 291         mask = amask;
 292         init_sec_ace(ace, &sid, atype, mask, aflags);
 293         SAFE_FREE(str);
 294         TALLOC_FREE(frame);
 295         return True;
 296 }
 297
 298
 299 /********************************************************************
 300 ********************************************************************/
 301
 302 static struct security_descriptor* parse_acl_string(TALLOC_CTX *mem_ctx, const char *szACL, size_t *sd_size )
 303 {
 304         struct security_descriptor *sd = NULL;
 305         struct security_ace *ace;
 306         struct security_acl *theacl;
 307         int num_ace;
 308         const char *pacl;
 309         int i;
 310
 311         if ( !szACL )
 312                 return NULL;
 313
 314         pacl = szACL;
 315         num_ace = count_chars( pacl, ',' ) + 1;
 316
 317         if ( !(ace = talloc_zero_array( mem_ctx, struct security_ace, num_ace )) )
 318                 return NULL;
 319
 320         for ( i=0; i<num_ace; i++ ) {
 321                 char *end_acl = strchr_m( pacl, ',' );
 322                 fstring acl_string;
 323
 324                 strncpy( acl_string, pacl, MIN( PTR_DIFF( end_acl, pacl ), sizeof(fstring)-1) );
 325                 acl_string[MIN( PTR_DIFF( end_acl, pacl ), sizeof(fstring)-1)] = '\0';
 326
 327                 if ( !parse_ace( &ace[i], acl_string ) )
 328                         return NULL;
 329
 330                 pacl = end_acl;
 331                 pacl++;
 332         }
 333
 334         if ( !(theacl = make_sec_acl( mem_ctx, NT4_ACL_REVISION, num_ace, ace )) )
 335                 return NULL;
 336
 337         sd = make_sec_desc( mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 338                 NULL, NULL, NULL, theacl, sd_size);
 339
 340         return sd;
 341 }
 342
 343 /* add an ACE to a list of ACEs in a struct security_acl */
 344 static bool add_ace(TALLOC_CTX *mem_ctx, struct security_acl **the_acl, struct security_ace *ace)
 345 {
 346         struct security_acl *new_ace;
 347         struct security_ace *aces;
 348         if (! *the_acl) {
 349                 return (((*the_acl) = make_sec_acl(mem_ctx, 3, 1, ace)) != NULL);
 350         }
 351
 352         if (!(aces = SMB_CALLOC_ARRAY(struct security_ace, 1+(*the_acl)->num_aces))) {
 353                 return False;
 354         }
 355         memcpy(aces, (*the_acl)->aces, (*the_acl)->num_aces * sizeof(struct
 356         security_ace));
 357         memcpy(aces+(*the_acl)->num_aces, ace, sizeof(struct security_ace));
 358         new_ace = make_sec_acl(mem_ctx,(*the_acl)->revision,1+(*the_acl)->num_aces, aces);
 359         SAFE_FREE(aces);
 360         (*the_acl) = new_ace;
 361         return True;
 362 }
 363
 364 /* The MSDN is contradictory over the ordering of ACE entries in an ACL.
 365    However NT4 gives a "The information may have been modified by a
 366    computer running Windows NT 5.0" if denied ACEs do not appear before
 367    allowed ACEs. */
 368
 369 static int ace_compare(struct security_ace *ace1, struct security_ace *ace2)
 370 {
 371         if (sec_ace_equal(ace1, ace2))
 372                 return 0;
 373
 374         if (ace1->type != ace2->type)
 375                 return ace2->type - ace1->type;
 376
 377         if (dom_sid_compare(&ace1->trustee, &ace2->trustee))
 378                 return dom_sid_compare(&ace1->trustee, &ace2->trustee);
 379
 380         if (ace1->flags != ace2->flags)
 381                 return ace1->flags - ace2->flags;
 382
 383         if (ace1->access_mask != ace2->access_mask)
 384                 return ace1->access_mask - ace2->access_mask;
 385
 386         if (ace1->size != ace2->size)
 387                 return ace1->size - ace2->size;
 388
 389         return memcmp(ace1, ace2, sizeof(struct security_ace));
 390 }
 391
 392 static void sort_acl(struct security_acl *the_acl)
 393 {
 394         uint32 i;
 395         if (!the_acl) return;
 396
 397         TYPESAFE_QSORT(the_acl->aces, the_acl->num_aces, ace_compare);
 398
 399         for (i=1;i<the_acl->num_aces;) {
 400                 if (sec_ace_equal(&the_acl->aces[i-1], &the_acl->aces[i])) {
 401                         int j;
 402                         for (j=i; j<the_acl->num_aces-1; j++) {
 403                                 the_acl->aces[j] = the_acl->aces[j+1];
 404                         }
 405                         the_acl->num_aces--;
 406                 } else {
 407                         i++;
 408                 }
 409         }
 410 }
 411
 412
 413 static int change_share_sec(TALLOC_CTX *mem_ctx, const char *sharename, char *the_acl, enum acl_mode mode)
 414 {
 415         struct security_descriptor *sd = NULL;
 416         struct security_descriptor *old = NULL;
 417         size_t sd_size = 0;
 418         uint32 i, j;
 419
 420         if (mode != SMB_ACL_SET && mode != SMB_SD_DELETE) {
 421             if (!(old = get_share_security( mem_ctx, sharename, &sd_size )) ) {
 422                 fprintf(stderr, "Unable to retrieve permissions for share "
 423                         "[%s]\n", sharename);
 424                 return -1;
 425             }
 426         }
 427
 428         if ( (mode != SMB_ACL_VIEW && mode != SMB_SD_DELETE) &&
 429             !(sd = parse_acl_string(mem_ctx, the_acl, &sd_size )) ) {
 430                 fprintf( stderr, "Failed to parse acl\n");
 431                 return -1;
 432         }
 433
 434         switch (mode) {
 435         case SMB_ACL_VIEW:
 436                 sec_desc_print( stdout, old);
 437                 return 0;
 438         case SMB_ACL_DELETE:
 439             for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
 440                 bool found = False;
 441
 442                 for (j=0;old->dacl && j<old->dacl->num_aces;j++) {
 443                     if (sec_ace_equal(&sd->dacl->aces[i], &old->dacl->aces[j])) {
 444                         uint32 k;
 445                         for (k=j; k<old->dacl->num_aces-1;k++) {
 446                             old->dacl->aces[k] = old->dacl->aces[k+1];
 447                         }
 448                         old->dacl->num_aces--;
 449                         found = True;
 450                         break;
 451                     }
 452                 }
 453
 454                 if (!found) {
 455                 printf("ACL for ACE:");
 456                 print_ace(stdout, &sd->dacl->aces[i]);
 457                 printf(" not found\n");
 458                 }
 459             }
 460             break;
 461         case SMB_ACL_MODIFY:
 462             for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
 463                 bool found = False;
 464
 465                 for (j=0;old->dacl && j<old->dacl->num_aces;j++) {
 466                     if (dom_sid_equal(&sd->dacl->aces[i].trustee,
 467                         &old->dacl->aces[j].trustee)) {
 468                         old->dacl->aces[j] = sd->dacl->aces[i];
 469                         found = True;
 470                     }
 471                 }
 472
 473                 if (!found) {
 474                     printf("ACL for SID %s not found\n",
 475                            sid_string_tos(&sd->dacl->aces[i].trustee));
 476                 }
 477             }
 478
 479             if (sd->owner_sid) {
 480                 old->owner_sid = sd->owner_sid;
 481             }
 482
 483             if (sd->group_sid) {
 484                 old->group_sid = sd->group_sid;
 485             }
 486             break;
 487         case SMB_ACL_ADD:
 488             for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
 489                 add_ace(mem_ctx, &old->dacl, &sd->dacl->aces[i]);
 490             }
 491             break;
 492         case SMB_ACL_SET:
 493             old = sd;
 494             break;
 495         case SMB_SD_DELETE:
 496             if (!delete_share_security(sharename)) {
 497                 fprintf( stderr, "Failed to delete security descriptor for "
 498                          "share [%s]\n", sharename );
 499                 return -1;
 500             }
 501             return 0;
 502         default:
 503                 fprintf(stderr, "invalid command\n");
 504                 return -1;
 505         }
 506
 507         /* Denied ACE entries must come before allowed ones */
 508         sort_acl(old->dacl);
 509
 510         if ( !set_share_security( sharename, old ) ) {
 511             fprintf( stderr, "Failed to store acl for share [%s]\n", sharename );
 512             return 2;
 513         }
 514         return 0;
 515 }
 516
 517 static int set_sharesec_sddl(const char *sharename, const char *sddl)
 518 {
 519         struct security_descriptor *sd;
 520         bool ret;
 521
 522         sd = sddl_decode(talloc_tos(), sddl, get_global_sam_sid());
 523         if (sd == NULL) {
 524                 fprintf(stderr, "Failed to parse acl\n");
 525                 return -1;
 526         }
 527
 528         ret = set_share_security(sharename, sd);
 529         TALLOC_FREE(sd);
 530         if (!ret) {
 531                 fprintf(stderr, "Failed to store acl for share [%s]\n",
 532                         sharename);
 533                 return -1;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static int view_sharesec_sddl(const char *sharename)
 540 {
 541         struct security_descriptor *sd;
 542         size_t sd_size;
 543         char *acl;
 544
 545         sd = get_share_security(talloc_tos(), sharename, &sd_size);
 546         if (sd == NULL) {
 547                 fprintf(stderr, "Unable to retrieve permissions for share "
 548                         "[%s]\n", sharename);
 549                 return -1;
 550         }
 551
 552         acl = sddl_encode(talloc_tos(), sd, get_global_sam_sid());
 553         TALLOC_FREE(sd);
 554         if (acl == NULL) {
 555                 fprintf(stderr, "Unable to sddl-encode permissions for share "
 556                         "[%s]\n", sharename);
 557                 return -1;
 558         }
 559         printf("%s\n", acl);
 560         TALLOC_FREE(acl);
 561         return 0;
 562 }
 563
 564 /********************************************************************
 565   main program
 566 ********************************************************************/
 567
 568 int main(int argc, const char *argv[])
 569 {
 570         int opt;
 571         int retval = 0;
 572         enum acl_mode mode = SMB_ACL_SET;
 573         static char *the_acl = NULL;
 574         fstring sharename;
 575         bool force_acl = False;
 576         int snum;
 577         poptContext pc;
 578         bool initialize_sid = False;
 579         struct poptOption long_options[] = {
 580                 POPT_AUTOHELP
 581                 { "remove", 'r', POPT_ARG_STRING, &the_acl, 'r', "Remove ACEs", "ACL" },
 582                 { "modify", 'm', POPT_ARG_STRING, &the_acl, 'm', "Modify existing ACEs", "ACL" },
 583                 { "add", 'a', POPT_ARG_STRING, &the_acl, 'a', "Add ACEs", "ACL" },
 584                 { "replace", 'R', POPT_ARG_STRING, &the_acl, 'R', "Overwrite share permission ACL", "ACLS" },
 585                 { "delete", 'D', POPT_ARG_NONE, NULL, 'D', "Delete the entire security descriptor" },
 586                 { "setsddl", 'S', POPT_ARG_STRING, the_acl, 'S',
 587                   "Set the SD in sddl format" },
 588                 { "viewsddl", 'V', POPT_ARG_NONE, the_acl, 'V',
 589                   "View the SD in sddl format" },
 590                 { "view", 'v', POPT_ARG_NONE, NULL, 'v', "View current share permissions" },
 591                 { "machine-sid", 'M', POPT_ARG_NONE, NULL, 'M', "Initialize the machine SID" },
 592                 { "force", 'F', POPT_ARG_NONE, NULL, 'F', "Force storing the ACL", "ACLS" },
 593                 POPT_COMMON_SAMBA
 594                 { NULL }
 595         };
 596
 597         if ( !(ctx = talloc_stackframe()) ) {
 598                 fprintf( stderr, "Failed to initialize talloc context!\n");
 599                 return -1;
 600         }
 601
 602         /* set default debug level to 1 regardless of what smb.conf sets */
 603         setup_logging( "sharesec", DEBUG_STDERR);
 604
 605         load_case_tables();
 606
 607         lp_set_cmdline("log level", "1");
 608
 609         pc = poptGetContext("sharesec", argc, argv, long_options, 0);
 610
 611         poptSetOtherOptionHelp(pc, "sharename\n");
 612
 613         while ((opt = poptGetNextOpt(pc)) != -1) {
 614                 switch (opt) {
 615                 case 'r':
 616                         the_acl = smb_xstrdup(poptGetOptArg(pc));
 617                         mode = SMB_ACL_DELETE;
 618                         break;
 619
 620                 case 'm':
 621                         the_acl = smb_xstrdup(poptGetOptArg(pc));
 622                         mode = SMB_ACL_MODIFY;
 623                         break;
 624
 625                 case 'a':
 626                         the_acl = smb_xstrdup(poptGetOptArg(pc));
 627                         mode = SMB_ACL_ADD;
 628                         break;
 629
 630                 case 'R':
 631                         the_acl = smb_xstrdup(poptGetOptArg(pc));
 632                         mode = SMB_ACL_SET;
 633                         break;
 634
 635                 case 'D':
 636                         mode = SMB_SD_DELETE;
 637                         break;
 638
 639                 case 'S':
 640                         mode = SMB_SD_SETSDDL;
 641                         the_acl = smb_xstrdup(poptGetOptArg(pc));
 642                         break;
 643
 644                 case 'V':
 645                         mode = SMB_SD_VIEWSDDL;
 646                         break;
 647
 648                 case 'v':
 649                         mode = SMB_ACL_VIEW;
 650                         break;
 651
 652                 case 'F':
 653                         force_acl = True;
 654                         break;
 655
 656                 case 'M':
 657                         initialize_sid = True;
 658                         break;
 659                 }
 660         }
 661
 662         setlinebuf(stdout);
 663
 664         lp_load_with_registry_shares( get_dyn_CONFIGFILE(), False, False, False,
 665                                       True );
 666
 667         /* check for initializing secrets.tdb first */
 668
 669         if ( initialize_sid ) {
 670                 struct dom_sid *sid = get_global_sam_sid();
 671
 672                 if ( !sid ) {
 673                         fprintf( stderr, "Failed to retrieve Machine SID!\n");
 674                         return 3;
 675                 }
 676
 677                 printf ("%s\n", sid_string_tos( sid ) );
 678                 return 0;
 679         }
 680
 681         if ( mode == SMB_ACL_VIEW && force_acl ) {
 682                 fprintf( stderr, "Invalid combination of -F and -v\n");
 683                 return -1;
 684         }
 685
 686         /* get the sharename */
 687
 688         if(!poptPeekArg(pc)) {
 689                 poptPrintUsage(pc, stderr, 0);
 690                 return -1;
 691         }
 692
 693         fstrcpy(sharename, poptGetArg(pc));
 694
 695         snum = lp_servicenumber( sharename );
 696
 697         if ( snum == -1 && !force_acl ) {
 698                 fprintf( stderr, "Invalid sharename: %s\n", sharename);
 699                 return -1;
 700         }
 701
 702         switch (mode) {
 703         case SMB_SD_SETSDDL:
 704                 retval = set_sharesec_sddl(sharename, the_acl);
 705                 break;
 706         case SMB_SD_VIEWSDDL:
 707                 retval = view_sharesec_sddl(sharename);
 708                 break;
 709         default:
 710                 retval = change_share_sec(ctx, sharename, the_acl, mode);
 711                 break;
 712         }
 713
 714         talloc_destroy(ctx);
 715
 716         return retval;
 717 }