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, const char *path, mode_t mode, SMB_DEV_T dev)
 492 {
 493         char *cappath = capencode(talloc_tos(), path);
 494
 495         if (!cappath) {
 496                 errno = ENOMEM;
 497                 return -1;
 498         }
 499         return SMB_VFS_NEXT_MKNOD(handle, cappath, mode, dev);
 500 }
 501
 502 static char *cap_realpath(vfs_handle_struct *handle, const char *path)
 503 {
 504         /* monyo need capencode'ed and capdecode'ed? */
 505         char *cappath = capencode(talloc_tos(), path);
 506
 507         if (!cappath) {
 508                 errno = ENOMEM;
 509                 return NULL;
 510         }
 511         return SMB_VFS_NEXT_REALPATH(handle, cappath);
 512 }
 513
 514 static int cap_chmod_acl(vfs_handle_struct *handle,
 515                         const struct smb_filename *smb_fname,
 516                         mode_t mode)
 517 {
 518         struct smb_filename *cap_smb_fname = NULL;
 519         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 520         int ret;
 521         int saved_errno;
 522
 523         /* If the underlying VFS doesn't have ACL support... */
 524         if (!cappath) {
 525                 errno = ENOMEM;
 526                 return -1;
 527         }
 528         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 529                                         cappath,
 530                                         NULL,
 531                                         NULL,
 532                                         smb_fname->flags);
 533         if (cap_smb_fname == NULL) {
 534                 TALLOC_FREE(cappath);
 535                 errno = ENOMEM;
 536                 return -1;
 537         }
 538
 539         ret = SMB_VFS_NEXT_CHMOD_ACL(handle, cap_smb_fname, mode);
 540         saved_errno = errno;
 541         TALLOC_FREE(cappath);
 542         TALLOC_FREE(cap_smb_fname);
 543         errno = saved_errno;
 544         return ret;
 545 }
 546
 547 static SMB_ACL_T cap_sys_acl_get_file(vfs_handle_struct *handle,
 548                                 const struct smb_filename *smb_fname,
 549                                 SMB_ACL_TYPE_T type,
 550                                 TALLOC_CTX *mem_ctx)
 551 {
 552         struct smb_filename *cap_smb_fname = NULL;
 553         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 554         SMB_ACL_T ret;
 555         int saved_errno = 0;
 556
 557         if (!cappath) {
 558                 errno = ENOMEM;
 559                 return (SMB_ACL_T)NULL;
 560         }
 561         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 562                                         cappath,
 563                                         NULL,
 564                                         NULL,
 565                                         smb_fname->flags);
 566         if (cap_smb_fname == NULL) {
 567                 TALLOC_FREE(cappath);
 568                 errno = ENOMEM;
 569                 return (SMB_ACL_T)NULL;
 570         }
 571         ret = SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, cap_smb_fname,
 572                                 type, mem_ctx);
 573         if (ret == NULL) {
 574                 saved_errno = errno;
 575         }
 576         TALLOC_FREE(cappath);
 577         TALLOC_FREE(cap_smb_fname);
 578         if (saved_errno != 0) {
 579                 errno = saved_errno;
 580         }
 581         return ret;
 582 }
 583
 584 static int cap_sys_acl_set_file(vfs_handle_struct *handle,
 585                         const struct smb_filename *smb_fname,
 586                         SMB_ACL_TYPE_T acltype,
 587                         SMB_ACL_T theacl)
 588 {
 589         struct smb_filename *cap_smb_fname = NULL;
 590         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 591         int ret;
 592         int saved_errno = 0;
 593
 594         if (!cappath) {
 595                 errno = ENOMEM;
 596                 return -1;
 597         }
 598         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 599                                         cappath,
 600                                         NULL,
 601                                         NULL,
 602                                         smb_fname->flags);
 603         if (cap_smb_fname == NULL) {
 604                 TALLOC_FREE(cappath);
 605                 errno = ENOMEM;
 606                 return -1;
 607         }
 608         ret =  SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, cap_smb_fname,
 609                                 acltype, theacl);
 610         if (ret == -1) {
 611                 saved_errno = errno;
 612         }
 613         TALLOC_FREE(cappath);
 614         TALLOC_FREE(cap_smb_fname);
 615         if (saved_errno != 0) {
 616                 errno = saved_errno;
 617         }
 618         return ret;
 619 }
 620
 621 static int cap_sys_acl_delete_def_file(vfs_handle_struct *handle,
 622                         const struct smb_filename *smb_fname)
 623 {
 624         struct smb_filename *cap_smb_fname = NULL;
 625         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 626         int ret;
 627         int saved_errno = 0;
 628
 629         if (!cappath) {
 630                 errno = ENOMEM;
 631                 return -1;
 632         }
 633         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 634                                         cappath,
 635                                         NULL,
 636                                         NULL,
 637                                         smb_fname->flags);
 638         if (cap_smb_fname == NULL) {
 639                 TALLOC_FREE(cappath);
 640                 errno = ENOMEM;
 641                 return -1;
 642         }
 643         ret = SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, cap_smb_fname);
 644         if (ret == -1) {
 645                 saved_errno = errno;
 646         }
 647         TALLOC_FREE(cappath);
 648         TALLOC_FREE(cap_smb_fname);
 649         if (saved_errno) {
 650                 errno = saved_errno;
 651         }
 652         return ret;
 653 }
 654
 655 static ssize_t cap_getxattr(vfs_handle_struct *handle,
 656                         const struct smb_filename *smb_fname,
 657                         const char *name,
 658                         void *value,
 659                         size_t size)
 660 {
 661         struct smb_filename *cap_smb_fname = NULL;
 662         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 663         char *capname = capencode(talloc_tos(), name);
 664         ssize_t ret;
 665         int saved_errno = 0;
 666
 667         if (!cappath || !capname) {
 668                 errno = ENOMEM;
 669                 return -1;
 670         }
 671         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 672                                         cappath,
 673                                         NULL,
 674                                         NULL,
 675                                         smb_fname->flags);
 676         if (cap_smb_fname == NULL) {
 677                 TALLOC_FREE(cappath);
 678                 TALLOC_FREE(capname);
 679                 errno = ENOMEM;
 680                 return -1;
 681         }
 682         ret = SMB_VFS_NEXT_GETXATTR(handle, cap_smb_fname,
 683                         capname, value, size);
 684         if (ret == -1) {
 685                 saved_errno = errno;
 686         }
 687         TALLOC_FREE(cappath);
 688         TALLOC_FREE(capname);
 689         TALLOC_FREE(cap_smb_fname);
 690         if (saved_errno) {
 691                 errno = saved_errno;
 692         }
 693         return ret;
 694 }
 695
 696 static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, void *value, size_t size)
 697 {
 698         char *cappath = capencode(talloc_tos(), path);
 699
 700         if (!cappath) {
 701                 errno = ENOMEM;
 702                 return -1;
 703         }
 704         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, cappath, value, size);
 705 }
 706
 707 static ssize_t cap_listxattr(vfs_handle_struct *handle,
 708                                 const struct smb_filename *smb_fname,
 709                                 char *list,
 710                                 size_t size)
 711 {
 712         struct smb_filename *cap_smb_fname = NULL;
 713         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 714         ssize_t ret;
 715         int saved_errno = 0;
 716
 717         if (!cappath) {
 718                 errno = ENOMEM;
 719                 return -1;
 720         }
 721         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 722                                         cappath,
 723                                         NULL,
 724                                         NULL,
 725                                         smb_fname->flags);
 726         if (cap_smb_fname == NULL) {
 727                 TALLOC_FREE(cappath);
 728                 errno = ENOMEM;
 729                 return -1;
 730         }
 731         ret = SMB_VFS_NEXT_LISTXATTR(handle, cap_smb_fname, list, size);
 732         if (ret == -1) {
 733                 saved_errno = errno;
 734         }
 735         TALLOC_FREE(cappath);
 736         TALLOC_FREE(cap_smb_fname);
 737         if (saved_errno) {
 738                 errno = saved_errno;
 739         }
 740         return ret;
 741 }
 742
 743 static int cap_removexattr(vfs_handle_struct *handle,
 744                                 const struct smb_filename *smb_fname,
 745                                 const char *name)
 746 {
 747         struct smb_filename *cap_smb_fname = NULL;
 748         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 749         char *capname = capencode(talloc_tos(), name);
 750         int ret;
 751         int saved_errno = 0;
 752
 753         if (!cappath || !capname) {
 754                 errno = ENOMEM;
 755                 return -1;
 756         }
 757         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 758                                         cappath,
 759                                         NULL,
 760                                         NULL,
 761                                         smb_fname->flags);
 762         if (cap_smb_fname == NULL) {
 763                 TALLOC_FREE(cappath);
 764                 TALLOC_FREE(capname);
 765                 errno = ENOMEM;
 766                 return -1;
 767         }
 768         ret = SMB_VFS_NEXT_REMOVEXATTR(handle, cap_smb_fname, capname);
 769         if (ret == -1) {
 770                 saved_errno = errno;
 771         }
 772         TALLOC_FREE(cappath);
 773         TALLOC_FREE(capname);
 774         TALLOC_FREE(cap_smb_fname);
 775         if (saved_errno) {
 776                 errno = saved_errno;
 777         }
 778         return ret;
 779 }
 780
 781 static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path)
 782 {
 783         char *cappath = capencode(talloc_tos(), path);
 784
 785         if (!cappath) {
 786                 errno = ENOMEM;
 787                 return -1;
 788         }
 789         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, cappath);
 790 }
 791
 792 static int cap_setxattr(vfs_handle_struct *handle,
 793                         const struct smb_filename *smb_fname,
 794                         const char *name,
 795                         const void *value,
 796                         size_t size,
 797                         int flags)
 798 {
 799         struct smb_filename *cap_smb_fname = NULL;
 800         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 801         char *capname = capencode(talloc_tos(), name);
 802         int ret;
 803         int saved_errno = 0;
 804
 805         if (!cappath || !capname) {
 806                 errno = ENOMEM;
 807                 return -1;
 808         }
 809         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 810                                         cappath,
 811                                         NULL,
 812                                         NULL,
 813                                         smb_fname->flags);
 814         if (cap_smb_fname == NULL) {
 815                 TALLOC_FREE(cappath);
 816                 TALLOC_FREE(capname);
 817                 errno = ENOMEM;
 818                 return -1;
 819         }
 820         ret = SMB_VFS_NEXT_SETXATTR(handle, cap_smb_fname,
 821                                 capname, value, size, flags);
 822         if (ret == -1) {
 823                 saved_errno = errno;
 824         }
 825         TALLOC_FREE(cappath);
 826         TALLOC_FREE(capname);
 827         TALLOC_FREE(cap_smb_fname);
 828         if (saved_errno) {
 829                 errno = saved_errno;
 830         }
 831         return ret;
 832 }
 833
 834 static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, const void *value, size_t size, int flags)
 835 {
 836         char *cappath = capencode(talloc_tos(), path);
 837
 838         if (!cappath) {
 839                 errno = ENOMEM;
 840                 return -1;
 841         }
 842         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, cappath, value, size, flags);
 843 }
 844
 845 static struct vfs_fn_pointers vfs_cap_fns = {
 846         .disk_free_fn = cap_disk_free,
 847         .get_quota_fn = cap_get_quota,
 848         .opendir_fn = cap_opendir,
 849         .readdir_fn = cap_readdir,
 850         .mkdir_fn = cap_mkdir,
 851         .rmdir_fn = cap_rmdir,
 852         .open_fn = cap_open,
 853         .rename_fn = cap_rename,
 854         .stat_fn = cap_stat,
 855         .lstat_fn = cap_lstat,
 856         .unlink_fn = cap_unlink,
 857         .chmod_fn = cap_chmod,
 858         .chown_fn = cap_chown,
 859         .lchown_fn = cap_lchown,
 860         .chdir_fn = cap_chdir,
 861         .ntimes_fn = cap_ntimes,
 862         .symlink_fn = cap_symlink,
 863         .readlink_fn = cap_readlink,
 864         .link_fn = cap_link,
 865         .mknod_fn = cap_mknod,
 866         .realpath_fn = cap_realpath,
 867         .chmod_acl_fn = cap_chmod_acl,
 868         .sys_acl_get_file_fn = cap_sys_acl_get_file,
 869         .sys_acl_set_file_fn = cap_sys_acl_set_file,
 870         .sys_acl_delete_def_file_fn = cap_sys_acl_delete_def_file,
 871         .getxattr_fn = cap_getxattr,
 872         .fgetxattr_fn = cap_fgetxattr,
 873         .listxattr_fn = cap_listxattr,
 874         .removexattr_fn = cap_removexattr,
 875         .fremovexattr_fn = cap_fremovexattr,
 876         .setxattr_fn = cap_setxattr,
 877         .fsetxattr_fn = cap_fsetxattr
 878 };
 879
 880 NTSTATUS vfs_cap_init(TALLOC_CTX *);
 881 NTSTATUS vfs_cap_init(TALLOC_CTX *ctx)
 882 {
 883         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap",
 884                                 &vfs_cap_fns);
 885 }
 886
 887 /* For CAP functions */
 888 #define hex_tag ':'
 889 #define hex2bin(c)              hex2bin_table[(unsigned char)(c)]
 890 #define bin2hex(c)              bin2hex_table[(unsigned char)(c)]
 891 #define is_hex(s)               ((s)[0] == hex_tag)
 892
 893 static unsigned char hex2bin_table[256] = {
 894 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
 895 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
 896 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
 897 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
 898 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
 899 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 900 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
 901 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
 902 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 903 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
 904 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
 905 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
 906 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
 907 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
 908 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
 909 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
 910 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
 911 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 */
 912 };
 913 static unsigned char bin2hex_table[256] = "0123456789abcdef";
 914
 915 /*******************************************************************
 916   original code -> ":xx"  - CAP format
 917 ********************************************************************/
 918
 919 static char *capencode(TALLOC_CTX *ctx, const char *from)
 920 {
 921         char *out = NULL;
 922         const char *p1;
 923         char *to = NULL;
 924         size_t len = 0;
 925
 926         for (p1 = from; *p1; p1++) {
 927                 if ((unsigned char)*p1 >= 0x80) {
 928                         len += 3;
 929                 } else {
 930                         len++;
 931                 }
 932         }
 933         len++;
 934
 935         to = talloc_array(ctx, char, len);
 936         if (!to) {
 937                 return NULL;
 938         }
 939
 940         for (out = to; *from;) {
 941                 /* buffer husoku error */
 942                 if ((unsigned char)*from >= 0x80) {
 943                         *out++ = hex_tag;
 944                         *out++ = bin2hex (((*from)>>4)&0x0f);
 945                         *out++ = bin2hex ((*from)&0x0f);
 946                         from++;
 947                 } else {
 948                         *out++ = *from++;
 949                 }
 950         }
 951         *out = '\0';
 952         return to;
 953 }
 954
 955 /*******************************************************************
 956   CAP -> original code
 957 ********************************************************************/
 958 /* ":xx" -> a byte */
 959
 960 static char *capdecode(TALLOC_CTX *ctx, const char *from)
 961 {
 962         const char *p1;
 963         char *out = NULL;
 964         char *to = NULL;
 965         size_t len = 0;
 966
 967         for (p1 = from; *p1; len++) {
 968                 if (is_hex(p1)) {
 969                         p1 += 3;
 970                 } else {
 971                         p1++;
 972                 }
 973         }
 974         len++;
 975
 976         to = talloc_array(ctx, char, len);
 977         if (!to) {
 978                 return NULL;
 979         }
 980
 981         for (out = to; *from;) {
 982                 if (is_hex(from)) {
 983                         *out++ = (hex2bin(from[1])<<4) | (hex2bin(from[2]));
 984                         from += 3;
 985                 } else {
 986                         *out++ = *from++;
 987                 }
 988         }
 989         *out = '\0';
 990         return to;
 991 }