source/libsmb/libsmb_file.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    SMB client library implementation
   4    Copyright (C) Andrew Tridgell 1998
   5    Copyright (C) Richard Sharpe 2000, 2002
   6    Copyright (C) John Terpstra 2000
   7    Copyright (C) Tom Jansen (Ninja ISD) 2002
   8    Copyright (C) Derrell Lipman 2003-2008
   9    Copyright (C) Jeremy Allison 2007, 2008
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "libsmbclient.h"
  27 #include "libsmb_internal.h"
  28
  29
  30 /*
  31  * Routine to open() a file ...
  32  */
  33
  34 SMBCFILE *
  35 SMBC_open_ctx(SMBCCTX *context,
  36               const char *fname,
  37               int flags,
  38               mode_t mode)
  39 {
  40         char *server = NULL;
  41         char *share = NULL;
  42         char *user = NULL;
  43         char *password = NULL;
  44         char *workgroup = NULL;
  45         char *path = NULL;
  46         char *targetpath = NULL;
  47         struct cli_state *targetcli = NULL;
  48         SMBCSRV *srv   = NULL;
  49         SMBCFILE *file = NULL;
  50         int fd;
  51         TALLOC_CTX *frame = talloc_stackframe();
  52
  53         if (!context || !context->internal->initialized) {
  54
  55                 errno = EINVAL;  /* Best I can think of ... */
  56                 TALLOC_FREE(frame);
  57                 return NULL;
  58
  59         }
  60
  61         if (!fname) {
  62
  63                 errno = EINVAL;
  64                 TALLOC_FREE(frame);
  65                 return NULL;
  66
  67         }
  68
  69         if (SMBC_parse_path(frame,
  70                             context,
  71                             fname,
  72                             &workgroup,
  73                             &server,
  74                             &share,
  75                             &path,
  76                             &user,
  77                             &password,
  78                             NULL)) {
  79                 errno = EINVAL;
  80                 TALLOC_FREE(frame);
  81                 return NULL;
  82         }
  83
  84         if (!user || user[0] == (char)0) {
  85                 user = talloc_strdup(frame, smbc_getUser(context));
  86                 if (!user) {
  87                         errno = ENOMEM;
  88                         TALLOC_FREE(frame);
  89                         return NULL;
  90                 }
  91         }
  92
  93         srv = SMBC_server(frame, context, True,
  94                           server, share, &workgroup, &user, &password);
  95
  96         if (!srv) {
  97                 if (errno == EPERM) errno = EACCES;
  98                 TALLOC_FREE(frame);
  99                 return NULL;  /* SMBC_server sets errno */
 100         }
 101
 102         /* Hmmm, the test for a directory is suspect here ... FIXME */
 103
 104         if (strlen(path) > 0 && path[strlen(path) - 1] == '\\') {
 105                 fd = -1;
 106         } else {
 107                 file = SMB_MALLOC_P(SMBCFILE);
 108
 109                 if (!file) {
 110                         errno = ENOMEM;
 111                         TALLOC_FREE(frame);
 112                         return NULL;
 113                 }
 114
 115                 ZERO_STRUCTP(file);
 116
 117                 /*d_printf(">>>open: resolving %s\n", path);*/
 118                 if (!cli_resolve_path(frame, "", srv->cli, path,
 119                                       &targetcli, &targetpath)) {
 120                         d_printf("Could not resolve %s\n", path);
 121                         SAFE_FREE(file);
 122                         TALLOC_FREE(frame);
 123                         return NULL;
 124                 }
 125                 /*d_printf(">>>open: resolved %s as %s\n", path, targetpath);*/
 126
 127                 if ((fd = cli_open(targetcli, targetpath, flags,
 128                                    context->internal->share_mode)) < 0) {
 129
 130                         /* Handle the error ... */
 131
 132                         SAFE_FREE(file);
 133                         errno = SMBC_errno(context, targetcli);
 134                         TALLOC_FREE(frame);
 135                         return NULL;
 136
 137                 }
 138
 139                 /* Fill in file struct */
 140
 141                 file->cli_fd  = fd;
 142                 file->fname   = SMB_STRDUP(fname);
 143                 file->srv     = srv;
 144                 file->offset  = 0;
 145                 file->file    = True;
 146
 147                 DLIST_ADD(context->internal->files, file);
 148
 149                 /*
 150                  * If the file was opened in O_APPEND mode, all write
 151                  * operations should be appended to the file.  To do that,
 152                  * though, using this protocol, would require a getattrE()
 153                  * call for each and every write, to determine where the end
 154                  * of the file is. (There does not appear to be an append flag
 155                  * in the protocol.)  Rather than add all of that overhead of
 156                  * retrieving the current end-of-file offset prior to each
 157                  * write operation, we'll assume that most append operations
 158                  * will continuously write, so we'll just set the offset to
 159                  * the end of the file now and hope that's adequate.
 160                  *
 161                  * Note to self: If this proves inadequate, and O_APPEND
 162                  * should, in some cases, be forced for each write, add a
 163                  * field in the context options structure, for
 164                  * "strict_append_mode" which would select between the current
 165                  * behavior (if FALSE) or issuing a getattrE() prior to each
 166                  * write and forcing the write to the end of the file (if
 167                  * TRUE).  Adding that capability will likely require adding
 168                  * an "append" flag into the _SMBCFILE structure to track
 169                  * whether a file was opened in O_APPEND mode.  -- djl
 170                  */
 171                 if (flags & O_APPEND) {
 172                         if (SMBC_lseek_ctx(context, file, 0, SEEK_END) < 0) {
 173                                 (void) SMBC_close_ctx(context, file);
 174                                 errno = ENXIO;
 175                                 TALLOC_FREE(frame);
 176                                 return NULL;
 177                         }
 178                 }
 179
 180                 TALLOC_FREE(frame);
 181                 return file;
 182
 183         }
 184
 185         /* Check if opendir needed ... */
 186
 187         if (fd == -1) {
 188                 int eno = 0;
 189
 190                 eno = SMBC_errno(context, srv->cli);
 191                 file = smbc_getFunctionOpendir(context)(context, fname);
 192                 if (!file) errno = eno;
 193                 TALLOC_FREE(frame);
 194                 return file;
 195
 196         }
 197
 198         errno = EINVAL; /* FIXME, correct errno ? */
 199         TALLOC_FREE(frame);
 200         return NULL;
 201
 202 }
 203
 204 /*
 205  * Routine to create a file
 206  */
 207
 208 SMBCFILE *
 209 SMBC_creat_ctx(SMBCCTX *context,
 210                const char *path,
 211                mode_t mode)
 212 {
 213
 214         if (!context || !context->internal->initialized) {
 215
 216                 errno = EINVAL;
 217                 return NULL;
 218
 219         }
 220
 221         return SMBC_open_ctx(context, path,
 222                              O_WRONLY | O_CREAT | O_TRUNC, mode);
 223 }
 224
 225 /*
 226  * Routine to read() a file ...
 227  */
 228
 229 ssize_t
 230 SMBC_read_ctx(SMBCCTX *context,
 231               SMBCFILE *file,
 232               void *buf,
 233               size_t count)
 234 {
 235         int ret;
 236         char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
 237         char *path = NULL;
 238         char *targetpath = NULL;
 239         struct cli_state *targetcli = NULL;
 240         TALLOC_CTX *frame = talloc_stackframe();
 241
 242         /*
 243          * offset:
 244          *
 245          * Compiler bug (possibly) -- gcc (GCC) 3.3.5 (Debian 1:3.3.5-2) --
 246          * appears to pass file->offset (which is type off_t) differently than
 247          * a local variable of type off_t.  Using local variable "offset" in
 248          * the call to cli_read() instead of file->offset fixes a problem
 249          * retrieving data at an offset greater than 4GB.
 250          */
 251         off_t offset;
 252
 253         if (!context || !context->internal->initialized) {
 254
 255                 errno = EINVAL;
 256                 TALLOC_FREE(frame);
 257                 return -1;
 258
 259         }
 260
 261         DEBUG(4, ("smbc_read(%p, %d)\n", file, (int)count));
 262
 263         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 264                 errno = EBADF;
 265                 TALLOC_FREE(frame);
 266                 return -1;
 267
 268         }
 269
 270         offset = file->offset;
 271
 272         /* Check that the buffer exists ... */
 273
 274         if (buf == NULL) {
 275                 errno = EINVAL;
 276                 TALLOC_FREE(frame);
 277                 return -1;
 278
 279         }
 280
 281         /*d_printf(">>>read: parsing %s\n", file->fname);*/
 282         if (SMBC_parse_path(frame,
 283                             context,
 284                             file->fname,
 285                             NULL,
 286                             &server,
 287                             &share,
 288                             &path,
 289                             &user,
 290                             &password,
 291                             NULL)) {
 292                 errno = EINVAL;
 293                 TALLOC_FREE(frame);
 294                 return -1;
 295         }
 296
 297         /*d_printf(">>>read: resolving %s\n", path);*/
 298         if (!cli_resolve_path(frame, "", file->srv->cli, path,
 299                               &targetcli, &targetpath)) {
 300                 d_printf("Could not resolve %s\n", path);
 301                 TALLOC_FREE(frame);
 302                 return -1;
 303         }
 304         /*d_printf(">>>fstat: resolved path as %s\n", targetpath);*/
 305
 306         ret = cli_read(targetcli, file->cli_fd, (char *)buf, offset, count);
 307
 308         if (ret < 0) {
 309
 310                 errno = SMBC_errno(context, targetcli);
 311                 TALLOC_FREE(frame);
 312                 return -1;
 313
 314         }
 315
 316         file->offset += ret;
 317
 318         DEBUG(4, ("  --> %d\n", ret));
 319
 320         TALLOC_FREE(frame);
 321         return ret;  /* Success, ret bytes of data ... */
 322
 323 }
 324
 325 /*
 326  * Routine to write() a file ...
 327  */
 328
 329 ssize_t
 330 SMBC_write_ctx(SMBCCTX *context,
 331                SMBCFILE *file,
 332                void *buf,
 333                size_t count)
 334 {
 335         int ret;
 336         off_t offset;
 337         char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
 338         char *path = NULL;
 339         char *targetpath = NULL;
 340         struct cli_state *targetcli = NULL;
 341         TALLOC_CTX *frame = talloc_stackframe();
 342
 343         /* First check all pointers before dereferencing them */
 344
 345         if (!context || !context->internal->initialized) {
 346
 347                 errno = EINVAL;
 348                 TALLOC_FREE(frame);
 349                 return -1;
 350
 351         }
 352
 353         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 354                 errno = EBADF;
 355                 TALLOC_FREE(frame);
 356                 return -1;
 357         }
 358
 359         /* Check that the buffer exists ... */
 360
 361         if (buf == NULL) {
 362                 errno = EINVAL;
 363                 TALLOC_FREE(frame);
 364                 return -1;
 365
 366         }
 367
 368         offset = file->offset; /* See "offset" comment in SMBC_read_ctx() */
 369
 370         /*d_printf(">>>write: parsing %s\n", file->fname);*/
 371         if (SMBC_parse_path(frame,
 372                             context,
 373                             file->fname,
 374                             NULL,
 375                             &server,
 376                             &share,
 377                             &path,
 378                             &user,
 379                             &password,
 380                             NULL)) {
 381                 errno = EINVAL;
 382                 TALLOC_FREE(frame);
 383                 return -1;
 384         }
 385
 386         /*d_printf(">>>write: resolving %s\n", path);*/
 387         if (!cli_resolve_path(frame, "", file->srv->cli, path,
 388                               &targetcli, &targetpath)) {
 389                 d_printf("Could not resolve %s\n", path);
 390                 TALLOC_FREE(frame);
 391                 return -1;
 392         }
 393         /*d_printf(">>>write: resolved path as %s\n", targetpath);*/
 394
 395         ret = cli_write(targetcli, file->cli_fd,
 396                         0, (char *)buf, offset, count);
 397
 398         if (ret <= 0) {
 399                 errno = SMBC_errno(context, targetcli);
 400                 TALLOC_FREE(frame);
 401                 return -1;
 402
 403         }
 404
 405         file->offset += ret;
 406
 407         TALLOC_FREE(frame);
 408         return ret;  /* Success, 0 bytes of data ... */
 409 }
 410
 411 /*
 412  * Routine to close() a file ...
 413  */
 414
 415 int
 416 SMBC_close_ctx(SMBCCTX *context,
 417                SMBCFILE *file)
 418 {
 419         SMBCSRV *srv;
 420         char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
 421         char *path = NULL;
 422         char *targetpath = NULL;
 423         struct cli_state *targetcli = NULL;
 424         TALLOC_CTX *frame = talloc_stackframe();
 425
 426         if (!context || !context->internal->initialized) {
 427
 428                 errno = EINVAL;
 429                 TALLOC_FREE(frame);
 430                 return -1;
 431         }
 432
 433         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 434                 errno = EBADF;
 435                 TALLOC_FREE(frame);
 436                 return -1;
 437         }
 438
 439         /* IS a dir ... */
 440         if (!file->file) {
 441                 TALLOC_FREE(frame);
 442                 return smbc_getFunctionClosedir(context)(context, file);
 443         }
 444
 445         /*d_printf(">>>close: parsing %s\n", file->fname);*/
 446         if (SMBC_parse_path(frame,
 447                             context,
 448                             file->fname,
 449                             NULL,
 450                             &server,
 451                             &share,
 452                             &path,
 453                             &user,
 454                             &password,
 455                             NULL)) {
 456                 errno = EINVAL;
 457                 TALLOC_FREE(frame);
 458                 return -1;
 459         }
 460
 461         /*d_printf(">>>close: resolving %s\n", path);*/
 462         if (!cli_resolve_path(frame, "", file->srv->cli, path,
 463                               &targetcli, &targetpath)) {
 464                 d_printf("Could not resolve %s\n", path);
 465                 TALLOC_FREE(frame);
 466                 return -1;
 467         }
 468         /*d_printf(">>>close: resolved path as %s\n", targetpath);*/
 469
 470         if (!cli_close(targetcli, file->cli_fd)) {
 471
 472                 DEBUG(3, ("cli_close failed on %s. purging server.\n",
 473                           file->fname));
 474                 /* Deallocate slot and remove the server
 475                  * from the server cache if unused */
 476                 errno = SMBC_errno(context, targetcli);
 477                 srv = file->srv;
 478                 DLIST_REMOVE(context->internal->files, file);
 479                 SAFE_FREE(file->fname);
 480                 SAFE_FREE(file);
 481                 smbc_getFunctionRemoveUnusedServer(context)(context, srv);
 482                 TALLOC_FREE(frame);
 483                 return -1;
 484
 485         }
 486
 487         DLIST_REMOVE(context->internal->files, file);
 488         SAFE_FREE(file->fname);
 489         SAFE_FREE(file);
 490         TALLOC_FREE(frame);
 491
 492         return 0;
 493 }
 494
 495 /*
 496  * Get info from an SMB server on a file. Use a qpathinfo call first
 497  * and if that fails, use getatr, as Win95 sometimes refuses qpathinfo
 498  */
 499 bool
 500 SMBC_getatr(SMBCCTX * context,
 501             SMBCSRV *srv,
 502             char *path,
 503             uint16 *mode,
 504             SMB_OFF_T *size,
 505             struct timespec *create_time_ts,
 506             struct timespec *access_time_ts,
 507             struct timespec *write_time_ts,
 508             struct timespec *change_time_ts,
 509             SMB_INO_T *ino)
 510 {
 511         char *fixedpath = NULL;
 512         char *targetpath = NULL;
 513         struct cli_state *targetcli = NULL;
 514         time_t write_time;
 515         TALLOC_CTX *frame = talloc_stackframe();
 516
 517         if (!context || !context->internal->initialized) {
 518
 519                 errno = EINVAL;
 520                 TALLOC_FREE(frame);
 521                 return false;
 522         }
 523
 524         /* path fixup for . and .. */
 525         if (strequal(path, ".") || strequal(path, "..")) {
 526                 fixedpath = talloc_strdup(frame, "\\");
 527                 if (!fixedpath) {
 528                         errno = ENOMEM;
 529                         TALLOC_FREE(frame);
 530                         return false;
 531                 }
 532         } else {
 533                 fixedpath = talloc_strdup(frame, path);
 534                 if (!fixedpath) {
 535                         errno = ENOMEM;
 536                         TALLOC_FREE(frame);
 537                         return false;
 538                 }
 539                 trim_string(fixedpath, NULL, "\\..");
 540                 trim_string(fixedpath, NULL, "\\.");
 541         }
 542         DEBUG(4,("SMBC_getatr: sending qpathinfo\n"));
 543
 544         if (!cli_resolve_path(frame, "", srv->cli, fixedpath,
 545                               &targetcli, &targetpath)) {
 546                 d_printf("Couldn't resolve %s\n", path);
 547                 TALLOC_FREE(frame);
 548                 return False;
 549         }
 550
 551         if (!srv->no_pathinfo2 &&
 552             cli_qpathinfo2(targetcli, targetpath,
 553                            create_time_ts,
 554                            access_time_ts,
 555                            write_time_ts,
 556                            change_time_ts,
 557                            size, mode, ino)) {
 558                 TALLOC_FREE(frame);
 559                 return True;
 560         }
 561
 562         /* if this is NT then don't bother with the getatr */
 563         if (targetcli->capabilities & CAP_NT_SMBS) {
 564                 errno = EPERM;
 565                 TALLOC_FREE(frame);
 566                 return False;
 567         }
 568
 569         if (cli_getatr(targetcli, targetpath, mode, size, &write_time)) {
 570
 571                 struct timespec w_time_ts;
 572
 573                 w_time_ts = convert_time_t_to_timespec(write_time);
 574
 575                 if (write_time_ts != NULL) {
 576                         *write_time_ts = w_time_ts;
 577                 }
 578
 579                 if (create_time_ts != NULL) {
 580                         *create_time_ts = w_time_ts;
 581                 }
 582
 583                 if (access_time_ts != NULL) {
 584                         *access_time_ts = w_time_ts;
 585                 }
 586
 587                 if (change_time_ts != NULL) {
 588                         *change_time_ts = w_time_ts;
 589                 }
 590
 591                 srv->no_pathinfo2 = True;
 592                 TALLOC_FREE(frame);
 593                 return True;
 594         }
 595
 596         errno = EPERM;
 597         TALLOC_FREE(frame);
 598         return False;
 599
 600 }
 601
 602 /*
 603  * Set file info on an SMB server.  Use setpathinfo call first.  If that
 604  * fails, use setattrE..
 605  *
 606  * Access and modification time parameters are always used and must be
 607  * provided.  Create time, if zero, will be determined from the actual create
 608  * time of the file.  If non-zero, the create time will be set as well.
 609  *
 610  * "mode" (attributes) parameter may be set to -1 if it is not to be set.
 611  */
 612 bool
 613 SMBC_setatr(SMBCCTX * context, SMBCSRV *srv, char *path,
 614             time_t create_time,
 615             time_t access_time,
 616             time_t write_time,
 617             time_t change_time,
 618             uint16 mode)
 619 {
 620         int fd;
 621         int ret;
 622         TALLOC_CTX *frame = talloc_stackframe();
 623
 624         /*
 625          * First, try setpathinfo (if qpathinfo succeeded), for it is the
 626          * modern function for "new code" to be using, and it works given a
 627          * filename rather than requiring that the file be opened to have its
 628          * attributes manipulated.
 629          */
 630         if (srv->no_pathinfo ||
 631             ! cli_setpathinfo(srv->cli, path,
 632                               create_time,
 633                               access_time,
 634                               write_time,
 635                               change_time,
 636                               mode)) {
 637
 638                 /*
 639                  * setpathinfo is not supported; go to plan B.
 640                  *
 641                  * cli_setatr() does not work on win98, and it also doesn't
 642                  * support setting the access time (only the modification
 643                  * time), so in all cases, we open the specified file and use
 644                  * cli_setattrE() which should work on all OS versions, and
 645                  * supports both times.
 646                  */
 647
 648                 /* Don't try {q,set}pathinfo() again, with this server */
 649                 srv->no_pathinfo = True;
 650
 651                 /* Open the file */
 652                 if ((fd = cli_open(srv->cli, path, O_RDWR, DENY_NONE)) < 0) {
 653
 654                         errno = SMBC_errno(context, srv->cli);
 655                         TALLOC_FREE(frame);
 656                         return -1;
 657                 }
 658
 659                 /* Set the new attributes */
 660                 ret = cli_setattrE(srv->cli, fd,
 661                                    change_time,
 662                                    access_time,
 663                                    write_time);
 664
 665                 /* Close the file */
 666                 cli_close(srv->cli, fd);
 667
 668                 /*
 669                  * Unfortunately, setattrE() doesn't have a provision for
 670                  * setting the access mode (attributes).  We'll have to try
 671                  * cli_setatr() for that, and with only this parameter, it
 672                  * seems to work on win98.
 673                  */
 674                 if (ret && mode != (uint16) -1) {
 675                         ret = cli_setatr(srv->cli, path, mode, 0);
 676                 }
 677
 678                 if (! ret) {
 679                         errno = SMBC_errno(context, srv->cli);
 680                         TALLOC_FREE(frame);
 681                         return False;
 682                 }
 683         }
 684
 685         TALLOC_FREE(frame);
 686         return True;
 687 }
 688
 689 /*
 690  * A routine to lseek() a file
 691  */
 692
 693 off_t
 694 SMBC_lseek_ctx(SMBCCTX *context,
 695                SMBCFILE *file,
 696                off_t offset,
 697                int whence)
 698 {
 699         SMB_OFF_T size;
 700         char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
 701         char *path = NULL;
 702         char *targetpath = NULL;
 703         struct cli_state *targetcli = NULL;
 704         TALLOC_CTX *frame = talloc_stackframe();
 705
 706         if (!context || !context->internal->initialized) {
 707
 708                 errno = EINVAL;
 709                 TALLOC_FREE(frame);
 710                 return -1;
 711         }
 712
 713         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 714
 715                 errno = EBADF;
 716                 TALLOC_FREE(frame);
 717                 return -1;
 718
 719         }
 720
 721         if (!file->file) {
 722
 723                 errno = EINVAL;
 724                 TALLOC_FREE(frame);
 725                 return -1;      /* Can't lseek a dir ... */
 726
 727         }
 728
 729         switch (whence) {
 730         case SEEK_SET:
 731                 file->offset = offset;
 732                 break;
 733
 734         case SEEK_CUR:
 735                 file->offset += offset;
 736                 break;
 737
 738         case SEEK_END:
 739                 /*d_printf(">>>lseek: parsing %s\n", file->fname);*/
 740                 if (SMBC_parse_path(frame,
 741                                     context,
 742                                     file->fname,
 743                                     NULL,
 744                                     &server,
 745                                     &share,
 746                                     &path,
 747                                     &user,
 748                                     &password,
 749                                     NULL)) {
 750                         errno = EINVAL;
 751                         TALLOC_FREE(frame);
 752                         return -1;
 753                 }
 754
 755                 /*d_printf(">>>lseek: resolving %s\n", path);*/
 756                 if (!cli_resolve_path(frame, "", file->srv->cli, path,
 757                                       &targetcli, &targetpath)) {
 758                         d_printf("Could not resolve %s\n", path);
 759                         TALLOC_FREE(frame);
 760                         return -1;
 761                 }
 762                 /*d_printf(">>>lseek: resolved path as %s\n", targetpath);*/
 763
 764                 if (!cli_qfileinfo(targetcli, file->cli_fd, NULL,
 765                                    &size, NULL, NULL, NULL, NULL, NULL))
 766                 {
 767                         SMB_OFF_T b_size = size;
 768                         if (!cli_getattrE(targetcli, file->cli_fd,
 769                                           NULL, &b_size, NULL, NULL, NULL))
 770                         {
 771                                 errno = EINVAL;
 772                                 TALLOC_FREE(frame);
 773                                 return -1;
 774                         } else
 775                                 size = b_size;
 776                 }
 777                 file->offset = size + offset;
 778                 break;
 779
 780         default:
 781                 errno = EINVAL;
 782                 break;
 783
 784         }
 785
 786         TALLOC_FREE(frame);
 787         return file->offset;
 788
 789 }
 790
 791
 792 /*
 793  * Routine to truncate a file given by its file descriptor, to a specified size
 794  */
 795
 796 int
 797 SMBC_ftruncate_ctx(SMBCCTX *context,
 798                    SMBCFILE *file,
 799                    off_t length)
 800 {
 801         SMB_OFF_T size = length;
 802         char *server = NULL;
 803         char *share = NULL;
 804         char *user = NULL;
 805         char *password = NULL;
 806         char *path = NULL;
 807         char *targetpath = NULL;
 808         struct cli_state *targetcli = NULL;
 809         TALLOC_CTX *frame = talloc_stackframe();
 810
 811         if (!context || !context->internal->initialized) {
 812
 813                 errno = EINVAL;
 814                 TALLOC_FREE(frame);
 815                 return -1;
 816         }
 817
 818         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 819                 errno = EBADF;
 820                 TALLOC_FREE(frame);
 821                 return -1;
 822         }
 823
 824         if (!file->file) {
 825                 errno = EINVAL;
 826                 TALLOC_FREE(frame);
 827                 return -1;
 828         }
 829
 830         /*d_printf(">>>fstat: parsing %s\n", file->fname);*/
 831         if (SMBC_parse_path(frame,
 832                             context,
 833                             file->fname,
 834                             NULL,
 835                             &server,
 836                             &share,
 837                             &path,
 838                             &user,
 839                             &password,
 840                             NULL)) {
 841                 errno = EINVAL;
 842                 TALLOC_FREE(frame);
 843                 return -1;
 844         }
 845
 846         /*d_printf(">>>fstat: resolving %s\n", path);*/
 847         if (!cli_resolve_path(frame, "", file->srv->cli, path,
 848                               &targetcli, &targetpath)) {
 849                 d_printf("Could not resolve %s\n", path);
 850                 TALLOC_FREE(frame);
 851                 return -1;
 852         }
 853         /*d_printf(">>>fstat: resolved path as %s\n", targetpath);*/
 854
 855         if (!cli_ftruncate(targetcli, file->cli_fd, size)) {
 856                 errno = EINVAL;
 857                 TALLOC_FREE(frame);
 858                 return -1;
 859         }
 860
 861         TALLOC_FREE(frame);
 862         return 0;
 863
 864 }