source3/modules/vfs_cap.c

   1 /*
   2  * CAP VFS module for Samba 3.x Version 0.3
   3  *
   4  * Copyright (C) Tim Potter, 1999-2000
   5  * Copyright (C) Alexander Bokovoy, 2002-2003
   6  * Copyright (C) Stefan (metze) Metzmacher, 2003
   7  * Copyright (C) TAKAHASHI Motonobu (monyo), 2003
   8  * Copyright (C) Jeremy Allison, 2007
   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 "smbd/smbd.h"
  27
  28 /* cap functions */
  29 static char *capencode(TALLOC_CTX *ctx, const char *from);
  30 static char *capdecode(TALLOC_CTX *ctx, const char *from);
  31
  32 static uint64_t cap_disk_free(vfs_handle_struct *handle,
  33                         const struct smb_filename *smb_fname,
  34                         uint64_t *bsize,
  35                         uint64_t *dfree,
  36                         uint64_t *dsize)
  37 {
  38         char *capname = capencode(talloc_tos(), smb_fname->base_name);
  39         struct smb_filename *cap_smb_fname = NULL;
  40
  41         if (!capname) {
  42                 errno = ENOMEM;
  43                 return (uint64_t)-1;
  44         }
  45         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
  46                                         capname,
  47                                         NULL,
  48                                         NULL,
  49                                         smb_fname->flags);
  50         if (cap_smb_fname == NULL) {
  51                 TALLOC_FREE(capname);
  52                 errno = ENOMEM;
  53                 return (uint64_t)-1;
  54         }
  55         return SMB_VFS_NEXT_DISK_FREE(handle, cap_smb_fname,
  56                         bsize, dfree, dsize);
  57 }
  58
  59 static int cap_get_quota(vfs_handle_struct *handle,
  60                         const struct smb_filename *smb_fname,
  61                         enum SMB_QUOTA_TYPE qtype,
  62                         unid_t id,
  63                         SMB_DISK_QUOTA *dq)
  64 {
  65         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
  66         struct smb_filename *cap_smb_fname = NULL;
  67
  68         if (!cappath) {
  69                 errno = ENOMEM;
  70                 return -1;
  71         }
  72         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
  73                                         cappath,
  74                                         NULL,
  75                                         NULL,
  76                                         smb_fname->flags);
  77         if (cap_smb_fname == NULL) {
  78                 TALLOC_FREE(cappath);
  79                 errno = ENOMEM;
  80                 return -1;
  81         }
  82         return SMB_VFS_NEXT_GET_QUOTA(handle, cap_smb_fname, qtype, id, dq);
  83 }
  84
  85 static DIR *cap_opendir(vfs_handle_struct *handle,
  86                         const struct smb_filename *smb_fname,
  87                         const char *mask,
  88                         uint32_t attr)
  89 {
  90         char *capname = capencode(talloc_tos(), smb_fname->base_name);
  91         struct smb_filename *cap_smb_fname = NULL;
  92
  93         if (!capname) {
  94                 errno = ENOMEM;
  95                 return NULL;
  96         }
  97         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
  98                                         capname,
  99                                         NULL,
 100                                         NULL,
 101                                         smb_fname->flags);
 102         if (cap_smb_fname == NULL) {
 103                 TALLOC_FREE(capname);
 104                 errno = ENOMEM;
 105                 return NULL;
 106         }
 107         return SMB_VFS_NEXT_OPENDIR(handle, cap_smb_fname, mask, attr);
 108 }
 109
 110 static struct dirent *cap_readdir(vfs_handle_struct *handle,
 111                                       DIR *dirp,
 112                                       SMB_STRUCT_STAT *sbuf)
 113 {
 114         struct dirent *result;
 115         struct dirent *newdirent;
 116         char *newname;
 117         size_t newnamelen;
 118         DEBUG(3,("cap: cap_readdir\n"));
 119
 120         result = SMB_VFS_NEXT_READDIR(handle, dirp, NULL);
 121         if (!result) {
 122                 return NULL;
 123         }
 124
 125         newname = capdecode(talloc_tos(), result->d_name);
 126         if (!newname) {
 127                 return NULL;
 128         }
 129         DEBUG(3,("cap: cap_readdir: %s\n", newname));
 130         newnamelen = strlen(newname)+1;
 131         newdirent = talloc_size(
 132                 talloc_tos(), sizeof(struct dirent) + newnamelen);
 133         if (!newdirent) {
 134                 return NULL;
 135         }
 136         talloc_set_name_const(newdirent, "struct dirent");
 137         memcpy(newdirent, result, sizeof(struct dirent));
 138         memcpy(&newdirent->d_name, newname, newnamelen);
 139         return newdirent;
 140 }
 141
 142 static int cap_mkdir(vfs_handle_struct *handle,
 143                 const struct smb_filename *smb_fname,
 144                 mode_t mode)
 145 {
 146         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 147         struct smb_filename *cap_smb_fname = NULL;
 148
 149         if (!cappath) {
 150                 errno = ENOMEM;
 151                 return -1;
 152         }
 153
 154         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 155                                         cappath,
 156                                         NULL,
 157                                         NULL,
 158                                         smb_fname->flags);
 159         if (cap_smb_fname == NULL) {
 160                 TALLOC_FREE(cappath);
 161                 errno = ENOMEM;
 162                 return -1;
 163         }
 164
 165         return SMB_VFS_NEXT_MKDIR(handle, cap_smb_fname, mode);
 166 }
 167
 168 static int cap_rmdir(vfs_handle_struct *handle,
 169                 const struct smb_filename *smb_fname)
 170 {
 171         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 172         struct smb_filename *cap_smb_fname = NULL;
 173
 174         if (!cappath) {
 175                 errno = ENOMEM;
 176                 return -1;
 177         }
 178
 179         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 180                                         cappath,
 181                                         NULL,
 182                                         NULL,
 183                                         smb_fname->flags);
 184         if (cap_smb_fname == NULL) {
 185                 TALLOC_FREE(cappath);
 186                 errno = ENOMEM;
 187                 return -1;
 188         }
 189
 190         return SMB_VFS_NEXT_RMDIR(handle, cap_smb_fname);
 191 }
 192
 193 static int cap_open(vfs_handle_struct *handle, struct smb_filename *smb_fname,
 194                     files_struct *fsp, int flags, mode_t mode)
 195 {
 196         char *cappath;
 197         char *tmp_base_name = NULL;
 198         int ret;
 199
 200         cappath = capencode(talloc_tos(), smb_fname->base_name);
 201
 202         if (!cappath) {
 203                 errno = ENOMEM;
 204                 return -1;
 205         }
 206
 207         tmp_base_name = smb_fname->base_name;
 208         smb_fname->base_name = cappath;
 209
 210         DEBUG(3,("cap: cap_open for %s\n", smb_fname_str_dbg(smb_fname)));
 211         ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 212
 213         smb_fname->base_name = tmp_base_name;
 214         TALLOC_FREE(cappath);
 215
 216         return ret;
 217 }
 218
 219 static int cap_rename(vfs_handle_struct *handle,
 220                       const struct smb_filename *smb_fname_src,
 221                       const struct smb_filename *smb_fname_dst)
 222 {
 223         char *capold = NULL;
 224         char *capnew = NULL;
 225         struct smb_filename *smb_fname_src_tmp = NULL;
 226         struct smb_filename *smb_fname_dst_tmp = NULL;
 227         int ret = -1;
 228
 229         capold = capencode(talloc_tos(), smb_fname_src->base_name);
 230         capnew = capencode(talloc_tos(), smb_fname_dst->base_name);
 231         if (!capold || !capnew) {
 232                 errno = ENOMEM;
 233                 goto out;
 234         }
 235
 236         /* Setup temporary smb_filename structs. */
 237         smb_fname_src_tmp = cp_smb_filename(talloc_tos(), smb_fname_src);
 238         if (smb_fname_src_tmp == NULL) {
 239                 errno = ENOMEM;
 240                 goto out;
 241         }
 242         smb_fname_dst_tmp = cp_smb_filename(talloc_tos(), smb_fname_dst);
 243         if (smb_fname_dst_tmp == NULL) {
 244                 errno = ENOMEM;
 245                 goto out;
 246         }
 247
 248         smb_fname_src_tmp->base_name = capold;
 249         smb_fname_dst_tmp->base_name = capnew;
 250
 251         ret = SMB_VFS_NEXT_RENAME(handle, smb_fname_src_tmp,
 252                                   smb_fname_dst_tmp);
 253  out:
 254         TALLOC_FREE(capold);
 255         TALLOC_FREE(capnew);
 256         TALLOC_FREE(smb_fname_src_tmp);
 257         TALLOC_FREE(smb_fname_dst_tmp);
 258
 259         return ret;
 260 }
 261
 262 static int cap_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 263 {
 264         char *cappath;
 265         char *tmp_base_name = NULL;
 266         int ret;
 267
 268         cappath = capencode(talloc_tos(), smb_fname->base_name);
 269
 270         if (!cappath) {
 271                 errno = ENOMEM;
 272                 return -1;
 273         }
 274
 275         tmp_base_name = smb_fname->base_name;
 276         smb_fname->base_name = cappath;
 277
 278         ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
 279
 280         smb_fname->base_name = tmp_base_name;
 281         TALLOC_FREE(cappath);
 282
 283         return ret;
 284 }
 285
 286 static int cap_lstat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 287 {
 288         char *cappath;
 289         char *tmp_base_name = NULL;
 290         int ret;
 291
 292         cappath = capencode(talloc_tos(), smb_fname->base_name);
 293
 294         if (!cappath) {
 295                 errno = ENOMEM;
 296                 return -1;
 297         }
 298
 299         tmp_base_name = smb_fname->base_name;
 300         smb_fname->base_name = cappath;
 301
 302         ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 303
 304         smb_fname->base_name = tmp_base_name;
 305         TALLOC_FREE(cappath);
 306
 307         return ret;
 308 }
 309
 310 static int cap_unlink(vfs_handle_struct *handle,
 311                       const struct smb_filename *smb_fname)
 312 {
 313         struct smb_filename *smb_fname_tmp = NULL;
 314         char *cappath = NULL;
 315         int ret;
 316
 317         cappath = capencode(talloc_tos(), smb_fname->base_name);
 318         if (!cappath) {
 319                 errno = ENOMEM;
 320                 return -1;
 321         }
 322
 323         /* Setup temporary smb_filename structs. */
 324         smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
 325         if (smb_fname_tmp == NULL) {
 326                 errno = ENOMEM;
 327                 return -1;
 328         }
 329
 330         smb_fname_tmp->base_name = cappath;
 331
 332         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 333
 334         TALLOC_FREE(smb_fname_tmp);
 335         return ret;
 336 }
 337
 338 static int cap_chmod(vfs_handle_struct *handle,
 339                         const struct smb_filename *smb_fname,
 340                         mode_t mode)
 341 {
 342         struct smb_filename *cap_smb_fname = NULL;
 343         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 344         int ret;
 345         int saved_errno;
 346
 347         if (!cappath) {
 348                 errno = ENOMEM;
 349                 return -1;
 350         }
 351
 352         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 353                                         cappath,
 354                                         NULL,
 355                                         NULL,
 356                                         smb_fname->flags);
 357         if (cap_smb_fname == NULL) {
 358                 TALLOC_FREE(cappath);
 359                 errno = ENOMEM;
 360                 return -1;
 361         }
 362
 363         ret = SMB_VFS_NEXT_CHMOD(handle, cap_smb_fname, mode);
 364         saved_errno = errno;
 365         TALLOC_FREE(cappath);
 366         TALLOC_FREE(cap_smb_fname);
 367         errno = saved_errno;
 368         return ret;
 369 }
 370
 371 static int cap_chown(vfs_handle_struct *handle,
 372                         const struct smb_filename *smb_fname,
 373                         uid_t uid,
 374                         gid_t gid)
 375 {
 376         struct smb_filename *cap_smb_fname = NULL;
 377         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 378         int ret;
 379         int saved_errno;
 380
 381         if (!cappath) {
 382                 errno = ENOMEM;
 383                 return -1;
 384         }
 385
 386         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 387                                         cappath,
 388                                         NULL,
 389                                         NULL,
 390                                         smb_fname->flags);
 391         if (cap_smb_fname == NULL) {
 392                 TALLOC_FREE(cappath);
 393                 errno = ENOMEM;
 394                 return -1;
 395         }
 396
 397         ret = SMB_VFS_NEXT_CHOWN(handle, cap_smb_fname, uid, gid);
 398         saved_errno = errno;
 399         TALLOC_FREE(cappath);
 400         TALLOC_FREE(cap_smb_fname);
 401         errno = saved_errno;
 402         return ret;
 403 }
 404
 405 static int cap_lchown(vfs_handle_struct *handle,
 406                         const struct smb_filename *smb_fname,
 407                         uid_t uid,
 408                         gid_t gid)
 409 {
 410         struct smb_filename *cap_smb_fname = NULL;
 411         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 412         int ret;
 413         int saved_errno;
 414
 415         if (!cappath) {
 416                 errno = ENOMEM;
 417                 return -1;
 418         }
 419
 420         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 421                                         cappath,
 422                                         NULL,
 423                                         NULL,
 424                                         smb_fname->flags);
 425         if (cap_smb_fname == NULL) {
 426                 TALLOC_FREE(cappath);
 427                 errno = ENOMEM;
 428                 return -1;
 429         }
 430
 431         ret = SMB_VFS_NEXT_LCHOWN(handle, cap_smb_fname, uid, gid);
 432         saved_errno = errno;
 433         TALLOC_FREE(cappath);
 434         TALLOC_FREE(cap_smb_fname);
 435         errno = saved_errno;
 436         return ret;
 437 }
 438
 439 static int cap_chdir(vfs_handle_struct *handle,
 440                         const struct smb_filename *smb_fname)
 441 {
 442         struct smb_filename *cap_smb_fname = NULL;
 443         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 444         int ret;
 445         int saved_errno = 0;
 446
 447         if (!cappath) {
 448                 errno = ENOMEM;
 449                 return -1;
 450         }
 451         DEBUG(3,("cap: cap_chdir for %s\n", smb_fname->base_name));
 452
 453         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 454                                         cappath,
 455                                         NULL,
 456                                         NULL,
 457                                         smb_fname->flags);
 458         if (cap_smb_fname == NULL) {
 459                 TALLOC_FREE(cappath);
 460                 errno = ENOMEM;
 461                 return -1;
 462         }
 463         ret = SMB_VFS_NEXT_CHDIR(handle, cap_smb_fname);
 464         if (ret == -1) {
 465                 saved_errno = errno;
 466         }
 467         TALLOC_FREE(cappath);
 468         TALLOC_FREE(cap_smb_fname);
 469         if (saved_errno != 0) {
 470                 errno = saved_errno;
 471         }
 472         return ret;
 473 }
 474
 475 static int cap_ntimes(vfs_handle_struct *handle,
 476                       const struct smb_filename *smb_fname,
 477                       struct smb_file_time *ft)
 478 {
 479         struct smb_filename *smb_fname_tmp = NULL;
 480         char *cappath = NULL;
 481         int ret;
 482
 483         cappath = capencode(talloc_tos(), smb_fname->base_name);
 484
 485         if (!cappath) {
 486                 errno = ENOMEM;
 487                 return -1;
 488         }
 489
 490         /* Setup temporary smb_filename structs. */
 491         smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
 492         if (smb_fname_tmp == NULL) {
 493                 errno = ENOMEM;
 494                 return -1;
 495         }
 496
 497         smb_fname_tmp->base_name = cappath;
 498
 499         ret = SMB_VFS_NEXT_NTIMES(handle, smb_fname_tmp, ft);
 500
 501         TALLOC_FREE(smb_fname_tmp);
 502         return ret;
 503 }
 504
 505
 506 static int cap_symlink(vfs_handle_struct *handle,
 507                         const char *link_contents,
 508                         const struct smb_filename *new_smb_fname)
 509 {
 510         char *capold = capencode(talloc_tos(), link_contents);
 511         char *capnew = capencode(talloc_tos(), new_smb_fname->base_name);
 512         struct smb_filename *new_cap_smb_fname = NULL;
 513         int saved_errno = 0;
 514         int ret;
 515
 516         if (!capold || !capnew) {
 517                 errno = ENOMEM;
 518                 return -1;
 519         }
 520         new_cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 521                                         capnew,
 522                                         NULL,
 523                                         NULL,
 524                                         new_smb_fname->flags);
 525         if (new_cap_smb_fname == NULL) {
 526                 TALLOC_FREE(capold);
 527                 TALLOC_FREE(capnew);
 528                 errno = ENOMEM;
 529                 return -1;
 530         }
 531         ret = SMB_VFS_NEXT_SYMLINK(handle,
 532                         capold,
 533                         new_cap_smb_fname);
 534         if (ret == -1) {
 535                 saved_errno = errno;
 536         }
 537         TALLOC_FREE(capold);
 538         TALLOC_FREE(capnew);
 539         TALLOC_FREE(new_cap_smb_fname);
 540         if (saved_errno != 0) {
 541                 errno = saved_errno;
 542         }
 543         return ret;
 544 }
 545
 546 static int cap_readlink(vfs_handle_struct *handle,
 547                         const struct smb_filename *smb_fname,
 548                         char *buf,
 549                         size_t bufsiz)
 550 {
 551         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 552         struct smb_filename *cap_smb_fname = NULL;
 553         int saved_errno = 0;
 554         int ret;
 555
 556         if (!cappath) {
 557                 errno = ENOMEM;
 558                 return -1;
 559         }
 560         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 561                                         cappath,
 562                                         NULL,
 563                                         NULL,
 564                                         smb_fname->flags);
 565         if (cap_smb_fname == NULL) {
 566                 TALLOC_FREE(cappath);
 567                 errno = ENOMEM;
 568                 return -1;
 569         }
 570         ret = SMB_VFS_NEXT_READLINK(handle, cap_smb_fname, buf, bufsiz);
 571         if (ret == -1) {
 572                 saved_errno = errno;
 573         }
 574         TALLOC_FREE(cappath);
 575         TALLOC_FREE(cap_smb_fname);
 576         if (saved_errno != 0) {
 577                 errno = saved_errno;
 578         }
 579         return ret;
 580 }
 581
 582 static int cap_link(vfs_handle_struct *handle,
 583                         const struct smb_filename *old_smb_fname,
 584                         const struct smb_filename *new_smb_fname)
 585 {
 586         char *capold = capencode(talloc_tos(), old_smb_fname->base_name);
 587         char *capnew = capencode(talloc_tos(), new_smb_fname->base_name);
 588         struct smb_filename *old_cap_smb_fname = NULL;
 589         struct smb_filename *new_cap_smb_fname = NULL;
 590         int saved_errno = 0;
 591         int ret;
 592
 593         if (!capold || !capnew) {
 594                 errno = ENOMEM;
 595                 return -1;
 596         }
 597         old_cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 598                                         capold,
 599                                         NULL,
 600                                         NULL,
 601                                         old_smb_fname->flags);
 602         if (old_cap_smb_fname == NULL) {
 603                 TALLOC_FREE(capold);
 604                 TALLOC_FREE(capnew);
 605                 errno = ENOMEM;
 606                 return -1;
 607         }
 608         new_cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 609                                         capnew,
 610                                         NULL,
 611                                         NULL,
 612                                         new_smb_fname->flags);
 613         if (new_cap_smb_fname == NULL) {
 614                 TALLOC_FREE(capold);
 615                 TALLOC_FREE(capnew);
 616                 TALLOC_FREE(old_cap_smb_fname);
 617                 errno = ENOMEM;
 618                 return -1;
 619         }
 620         ret = SMB_VFS_NEXT_LINK(handle, old_cap_smb_fname, new_cap_smb_fname);
 621         if (ret == -1) {
 622                 saved_errno = errno;
 623         }
 624         TALLOC_FREE(capold);
 625         TALLOC_FREE(capnew);
 626         TALLOC_FREE(old_cap_smb_fname);
 627         TALLOC_FREE(new_cap_smb_fname);
 628         if (saved_errno != 0) {
 629                 errno = saved_errno;
 630         }
 631         return ret;
 632 }
 633
 634 static int cap_mknod(vfs_handle_struct *handle,
 635                 const struct smb_filename *smb_fname,
 636                 mode_t mode,
 637                 SMB_DEV_T dev)
 638 {
 639         struct smb_filename *cap_smb_fname = NULL;
 640         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 641         int ret;
 642         int saved_errno = 0;
 643
 644         if (!cappath) {
 645                 errno = ENOMEM;
 646                 return -1;
 647         }
 648         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 649                                         cappath,
 650                                         NULL,
 651                                         NULL,
 652                                         smb_fname->flags);
 653         if (cap_smb_fname == NULL) {
 654                 TALLOC_FREE(cappath);
 655                 errno = ENOMEM;
 656                 return -1;
 657         }
 658         ret = SMB_VFS_NEXT_MKNOD(handle, cap_smb_fname, mode, dev);
 659         if (ret == -1) {
 660                 saved_errno = errno;
 661         }
 662         TALLOC_FREE(cappath);
 663         TALLOC_FREE(cap_smb_fname);
 664         if (saved_errno != 0) {
 665                 errno = saved_errno;
 666         }
 667         return ret;
 668 }
 669
 670 static struct smb_filename *cap_realpath(vfs_handle_struct *handle,
 671                         TALLOC_CTX *ctx,
 672                         const struct smb_filename *smb_fname)
 673 {
 674         /* monyo need capencode'ed and capdecode'ed? */
 675         struct smb_filename *cap_smb_fname = NULL;
 676         struct smb_filename *return_fname = NULL;
 677         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 678         int saved_errno = 0;
 679
 680         if (!cappath) {
 681                 errno = ENOMEM;
 682                 return NULL;
 683         }
 684         cap_smb_fname = synthetic_smb_fname(ctx,
 685                                         cappath,
 686                                         NULL,
 687                                         NULL,
 688                                         smb_fname->flags);
 689         if (cap_smb_fname == NULL) {
 690                 TALLOC_FREE(cappath);
 691                 errno = ENOMEM;
 692                 return NULL;
 693         }
 694         return_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, cap_smb_fname);
 695         if (return_fname == NULL) {
 696                 saved_errno = errno;
 697         }
 698         TALLOC_FREE(cappath);
 699         TALLOC_FREE(cap_smb_fname);
 700         if (saved_errno != 0) {
 701                 errno = saved_errno;
 702         }
 703         return return_fname;
 704 }
 705
 706 static int cap_chmod_acl(vfs_handle_struct *handle,
 707                         const struct smb_filename *smb_fname,
 708                         mode_t mode)
 709 {
 710         struct smb_filename *cap_smb_fname = NULL;
 711         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 712         int ret;
 713         int saved_errno;
 714
 715         /* If the underlying VFS doesn't have ACL support... */
 716         if (!cappath) {
 717                 errno = ENOMEM;
 718                 return -1;
 719         }
 720         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 721                                         cappath,
 722                                         NULL,
 723                                         NULL,
 724                                         smb_fname->flags);
 725         if (cap_smb_fname == NULL) {
 726                 TALLOC_FREE(cappath);
 727                 errno = ENOMEM;
 728                 return -1;
 729         }
 730
 731         ret = SMB_VFS_NEXT_CHMOD_ACL(handle, cap_smb_fname, mode);
 732         saved_errno = errno;
 733         TALLOC_FREE(cappath);
 734         TALLOC_FREE(cap_smb_fname);
 735         errno = saved_errno;
 736         return ret;
 737 }
 738
 739 static SMB_ACL_T cap_sys_acl_get_file(vfs_handle_struct *handle,
 740                                 const struct smb_filename *smb_fname,
 741                                 SMB_ACL_TYPE_T type,
 742                                 TALLOC_CTX *mem_ctx)
 743 {
 744         struct smb_filename *cap_smb_fname = NULL;
 745         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 746         SMB_ACL_T ret;
 747         int saved_errno = 0;
 748
 749         if (!cappath) {
 750                 errno = ENOMEM;
 751                 return (SMB_ACL_T)NULL;
 752         }
 753         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 754                                         cappath,
 755                                         NULL,
 756                                         NULL,
 757                                         smb_fname->flags);
 758         if (cap_smb_fname == NULL) {
 759                 TALLOC_FREE(cappath);
 760                 errno = ENOMEM;
 761                 return (SMB_ACL_T)NULL;
 762         }
 763         ret = SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, cap_smb_fname,
 764                                 type, mem_ctx);
 765         if (ret == NULL) {
 766                 saved_errno = errno;
 767         }
 768         TALLOC_FREE(cappath);
 769         TALLOC_FREE(cap_smb_fname);
 770         if (saved_errno != 0) {
 771                 errno = saved_errno;
 772         }
 773         return ret;
 774 }
 775
 776 static int cap_sys_acl_set_file(vfs_handle_struct *handle,
 777                         const struct smb_filename *smb_fname,
 778                         SMB_ACL_TYPE_T acltype,
 779                         SMB_ACL_T theacl)
 780 {
 781         struct smb_filename *cap_smb_fname = NULL;
 782         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 783         int ret;
 784         int saved_errno = 0;
 785
 786         if (!cappath) {
 787                 errno = ENOMEM;
 788                 return -1;
 789         }
 790         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 791                                         cappath,
 792                                         NULL,
 793                                         NULL,
 794                                         smb_fname->flags);
 795         if (cap_smb_fname == NULL) {
 796                 TALLOC_FREE(cappath);
 797                 errno = ENOMEM;
 798                 return -1;
 799         }
 800         ret =  SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, cap_smb_fname,
 801                                 acltype, theacl);
 802         if (ret == -1) {
 803                 saved_errno = errno;
 804         }
 805         TALLOC_FREE(cappath);
 806         TALLOC_FREE(cap_smb_fname);
 807         if (saved_errno != 0) {
 808                 errno = saved_errno;
 809         }
 810         return ret;
 811 }
 812
 813 static int cap_sys_acl_delete_def_file(vfs_handle_struct *handle,
 814                         const struct smb_filename *smb_fname)
 815 {
 816         struct smb_filename *cap_smb_fname = NULL;
 817         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 818         int ret;
 819         int saved_errno = 0;
 820
 821         if (!cappath) {
 822                 errno = ENOMEM;
 823                 return -1;
 824         }
 825         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 826                                         cappath,
 827                                         NULL,
 828                                         NULL,
 829                                         smb_fname->flags);
 830         if (cap_smb_fname == NULL) {
 831                 TALLOC_FREE(cappath);
 832                 errno = ENOMEM;
 833                 return -1;
 834         }
 835         ret = SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, cap_smb_fname);
 836         if (ret == -1) {
 837                 saved_errno = errno;
 838         }
 839         TALLOC_FREE(cappath);
 840         TALLOC_FREE(cap_smb_fname);
 841         if (saved_errno) {
 842                 errno = saved_errno;
 843         }
 844         return ret;
 845 }
 846
 847 static ssize_t cap_getxattr(vfs_handle_struct *handle,
 848                         const struct smb_filename *smb_fname,
 849                         const char *name,
 850                         void *value,
 851                         size_t size)
 852 {
 853         struct smb_filename *cap_smb_fname = NULL;
 854         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 855         char *capname = capencode(talloc_tos(), name);
 856         ssize_t ret;
 857         int saved_errno = 0;
 858
 859         if (!cappath || !capname) {
 860                 errno = ENOMEM;
 861                 return -1;
 862         }
 863         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 864                                         cappath,
 865                                         NULL,
 866                                         NULL,
 867                                         smb_fname->flags);
 868         if (cap_smb_fname == NULL) {
 869                 TALLOC_FREE(cappath);
 870                 TALLOC_FREE(capname);
 871                 errno = ENOMEM;
 872                 return -1;
 873         }
 874         ret = SMB_VFS_NEXT_GETXATTR(handle, cap_smb_fname,
 875                         capname, value, size);
 876         if (ret == -1) {
 877                 saved_errno = errno;
 878         }
 879         TALLOC_FREE(cappath);
 880         TALLOC_FREE(capname);
 881         TALLOC_FREE(cap_smb_fname);
 882         if (saved_errno) {
 883                 errno = saved_errno;
 884         }
 885         return ret;
 886 }
 887
 888 static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, void *value, size_t size)
 889 {
 890         char *cappath = capencode(talloc_tos(), path);
 891
 892         if (!cappath) {
 893                 errno = ENOMEM;
 894                 return -1;
 895         }
 896         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, cappath, value, size);
 897 }
 898
 899 static ssize_t cap_listxattr(vfs_handle_struct *handle,
 900                                 const struct smb_filename *smb_fname,
 901                                 char *list,
 902                                 size_t size)
 903 {
 904         struct smb_filename *cap_smb_fname = NULL;
 905         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 906         ssize_t ret;
 907         int saved_errno = 0;
 908
 909         if (!cappath) {
 910                 errno = ENOMEM;
 911                 return -1;
 912         }
 913         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 914                                         cappath,
 915                                         NULL,
 916                                         NULL,
 917                                         smb_fname->flags);
 918         if (cap_smb_fname == NULL) {
 919                 TALLOC_FREE(cappath);
 920                 errno = ENOMEM;
 921                 return -1;
 922         }
 923         ret = SMB_VFS_NEXT_LISTXATTR(handle, cap_smb_fname, list, size);
 924         if (ret == -1) {
 925                 saved_errno = errno;
 926         }
 927         TALLOC_FREE(cappath);
 928         TALLOC_FREE(cap_smb_fname);
 929         if (saved_errno) {
 930                 errno = saved_errno;
 931         }
 932         return ret;
 933 }
 934
 935 static int cap_removexattr(vfs_handle_struct *handle,
 936                                 const struct smb_filename *smb_fname,
 937                                 const char *name)
 938 {
 939         struct smb_filename *cap_smb_fname = NULL;
 940         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 941         char *capname = capencode(talloc_tos(), name);
 942         int ret;
 943         int saved_errno = 0;
 944
 945         if (!cappath || !capname) {
 946                 errno = ENOMEM;
 947                 return -1;
 948         }
 949         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 950                                         cappath,
 951                                         NULL,
 952                                         NULL,
 953                                         smb_fname->flags);
 954         if (cap_smb_fname == NULL) {
 955                 TALLOC_FREE(cappath);
 956                 TALLOC_FREE(capname);
 957                 errno = ENOMEM;
 958                 return -1;
 959         }
 960         ret = SMB_VFS_NEXT_REMOVEXATTR(handle, cap_smb_fname, capname);
 961         if (ret == -1) {
 962                 saved_errno = errno;
 963         }
 964         TALLOC_FREE(cappath);
 965         TALLOC_FREE(capname);
 966         TALLOC_FREE(cap_smb_fname);
 967         if (saved_errno) {
 968                 errno = saved_errno;
 969         }
 970         return ret;
 971 }
 972
 973 static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path)
 974 {
 975         char *cappath = capencode(talloc_tos(), path);
 976
 977         if (!cappath) {
 978                 errno = ENOMEM;
 979                 return -1;
 980         }
 981         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, cappath);
 982 }
 983
 984 static int cap_setxattr(vfs_handle_struct *handle,
 985                         const struct smb_filename *smb_fname,
 986                         const char *name,
 987                         const void *value,
 988                         size_t size,
 989                         int flags)
 990 {
 991         struct smb_filename *cap_smb_fname = NULL;
 992         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 993         char *capname = capencode(talloc_tos(), name);
 994         int ret;
 995         int saved_errno = 0;
 996
 997         if (!cappath || !capname) {
 998                 errno = ENOMEM;
 999                 return -1;
1000         }
1001         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
1002                                         cappath,
1003                                         NULL,
1004                                         NULL,
1005                                         smb_fname->flags);
1006         if (cap_smb_fname == NULL) {
1007                 TALLOC_FREE(cappath);
1008                 TALLOC_FREE(capname);
1009                 errno = ENOMEM;
1010                 return -1;
1011         }
1012         ret = SMB_VFS_NEXT_SETXATTR(handle, cap_smb_fname,
1013                                 capname, value, size, flags);
1014         if (ret == -1) {
1015                 saved_errno = errno;
1016         }
1017         TALLOC_FREE(cappath);
1018         TALLOC_FREE(capname);
1019         TALLOC_FREE(cap_smb_fname);
1020         if (saved_errno) {
1021                 errno = saved_errno;
1022         }
1023         return ret;
1024 }
1025
1026 static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, const void *value, size_t size, int flags)
1027 {
1028         char *cappath = capencode(talloc_tos(), path);
1029
1030         if (!cappath) {
1031                 errno = ENOMEM;
1032                 return -1;
1033         }
1034         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, cappath, value, size, flags);
1035 }
1036
1037 static struct vfs_fn_pointers vfs_cap_fns = {
1038         .disk_free_fn = cap_disk_free,
1039         .get_quota_fn = cap_get_quota,
1040         .opendir_fn = cap_opendir,
1041         .readdir_fn = cap_readdir,
1042         .mkdir_fn = cap_mkdir,
1043         .rmdir_fn = cap_rmdir,
1044         .open_fn = cap_open,
1045         .rename_fn = cap_rename,
1046         .stat_fn = cap_stat,
1047         .lstat_fn = cap_lstat,
1048         .unlink_fn = cap_unlink,
1049         .chmod_fn = cap_chmod,
1050         .chown_fn = cap_chown,
1051         .lchown_fn = cap_lchown,
1052         .chdir_fn = cap_chdir,
1053         .ntimes_fn = cap_ntimes,
1054         .symlink_fn = cap_symlink,
1055         .readlink_fn = cap_readlink,
1056         .link_fn = cap_link,
1057         .mknod_fn = cap_mknod,
1058         .realpath_fn = cap_realpath,
1059         .chmod_acl_fn = cap_chmod_acl,
1060         .sys_acl_get_file_fn = cap_sys_acl_get_file,
1061         .sys_acl_set_file_fn = cap_sys_acl_set_file,
1062         .sys_acl_delete_def_file_fn = cap_sys_acl_delete_def_file,
1063         .getxattr_fn = cap_getxattr,
1064         .fgetxattr_fn = cap_fgetxattr,
1065         .listxattr_fn = cap_listxattr,
1066         .removexattr_fn = cap_removexattr,
1067         .fremovexattr_fn = cap_fremovexattr,
1068         .setxattr_fn = cap_setxattr,
1069         .fsetxattr_fn = cap_fsetxattr
1070 };
1071
1072 NTSTATUS vfs_cap_init(TALLOC_CTX *);
1073 NTSTATUS vfs_cap_init(TALLOC_CTX *ctx)
1074 {
1075         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap",
1076                                 &vfs_cap_fns);
1077 }
1078
1079 /* For CAP functions */
1080 #define hex_tag ':'
1081 #define hex2bin(c)              hex2bin_table[(unsigned char)(c)]
1082 #define bin2hex(c)              bin2hex_table[(unsigned char)(c)]
1083 #define is_hex(s)               ((s)[0] == hex_tag)
1084
1085 static unsigned char hex2bin_table[256] = {
1086 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
1087 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
1088 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
1089 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
1090 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
1091 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
1092 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
1093 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
1094 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
1095 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
1096 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
1097 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
1098 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
1099 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
1100 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
1101 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
1102 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
1103 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 */
1104 };
1105 static unsigned char bin2hex_table[256] = "0123456789abcdef";
1106
1107 /*******************************************************************
1108   original code -> ":xx"  - CAP format
1109 ********************************************************************/
1110
1111 static char *capencode(TALLOC_CTX *ctx, const char *from)
1112 {
1113         char *out = NULL;
1114         const char *p1;
1115         char *to = NULL;
1116         size_t len = 0;
1117
1118         for (p1 = from; *p1; p1++) {
1119                 if ((unsigned char)*p1 >= 0x80) {
1120                         len += 3;
1121                 } else {
1122                         len++;
1123                 }
1124         }
1125         len++;
1126
1127         to = talloc_array(ctx, char, len);
1128         if (!to) {
1129                 return NULL;
1130         }
1131
1132         for (out = to; *from;) {
1133                 /* buffer husoku error */
1134                 if ((unsigned char)*from >= 0x80) {
1135                         *out++ = hex_tag;
1136                         *out++ = bin2hex (((*from)>>4)&0x0f);
1137                         *out++ = bin2hex ((*from)&0x0f);
1138                         from++;
1139                 } else {
1140                         *out++ = *from++;
1141                 }
1142         }
1143         *out = '\0';
1144         return to;
1145 }
1146
1147 /*******************************************************************
1148   CAP -> original code
1149 ********************************************************************/
1150 /* ":xx" -> a byte */
1151
1152 static char *capdecode(TALLOC_CTX *ctx, const char *from)
1153 {
1154         const char *p1;
1155         char *out = NULL;
1156         char *to = NULL;
1157         size_t len = 0;
1158
1159         for (p1 = from; *p1; len++) {
1160                 if (is_hex(p1)) {
1161                         p1 += 3;
1162                 } else {
1163                         p1++;
1164                 }
1165         }
1166         len++;
1167
1168         to = talloc_array(ctx, char, len);
1169         if (!to) {
1170                 return NULL;
1171         }
1172
1173         for (out = to; *from;) {
1174                 if (is_hex(from)) {
1175                         *out++ = (hex2bin(from[1])<<4) | (hex2bin(from[2]));
1176                         from += 3;
1177                 } else {
1178                         *out++ = *from++;
1179                 }
1180         }
1181         *out = '\0';
1182         return to;
1183 }