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