source3/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 "libsmb/libsmb.h"
  27 #include "libsmbclient.h"
  28 #include "libsmb_internal.h"
  29 #include "../libcli/smb/smbXcli_base.h"
  30
  31 /*
  32  * Routine to open() a file ...
  33  */
  34
  35 SMBCFILE *
  36 SMBC_open_ctx(SMBCCTX *context,
  37               const char *fname,
  38               int flags,
  39               mode_t mode)
  40 {
  41         char *server = NULL;
  42         char *share = NULL;
  43         char *user = NULL;
  44         char *password = NULL;
  45         char *workgroup = NULL;
  46         char *path = NULL;
  47         char *targetpath = NULL;
  48         struct cli_state *targetcli = NULL;
  49         SMBCSRV *srv   = NULL;
  50         SMBCFILE *file = NULL;
  51         uint16_t fd;
  52         uint16_t port = 0;
  53         NTSTATUS status = NT_STATUS_OBJECT_PATH_INVALID;
  54         TALLOC_CTX *frame = talloc_stackframe();
  55
  56         if (!context || !context->internal->initialized) {
  57                 errno = EINVAL;  /* Best I can think of ... */
  58                 TALLOC_FREE(frame);
  59                 return NULL;
  60         }
  61
  62         if (!fname) {
  63                 errno = EINVAL;
  64                 TALLOC_FREE(frame);
  65                 return NULL;
  66         }
  67
  68         if (SMBC_parse_path(frame,
  69                             context,
  70                             fname,
  71                             &workgroup,
  72                             &server,
  73                             &port,
  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, port, share, &workgroup, &user, &password);
  95         if (!srv) {
  96                 if (errno == EPERM) errno = EACCES;
  97                 TALLOC_FREE(frame);
  98                 return NULL;  /* SMBC_server sets errno */
  99         }
 100
 101         /* Hmmm, the test for a directory is suspect here ... FIXME */
 102
 103         if (strlen(path) > 0 && path[strlen(path) - 1] == '\\') {
 104                 status = NT_STATUS_OBJECT_PATH_INVALID;
 105         } else {
 106                 file = SMB_MALLOC_P(SMBCFILE);
 107                 if (!file) {
 108                         errno = ENOMEM;
 109                         TALLOC_FREE(frame);
 110                         return NULL;
 111                 }
 112
 113                 ZERO_STRUCTP(file);
 114
 115                 /*d_printf(">>>open: resolving %s\n", path);*/
 116                 status = cli_resolve_path(
 117                         frame, "", context->internal->auth_info,
 118                         srv->cli, path, &targetcli, &targetpath);
 119                 if (!NT_STATUS_IS_OK(status)) {
 120                         d_printf("Could not resolve %s\n", path);
 121                         errno = ENOENT;
 122                         SAFE_FREE(file);
 123                         TALLOC_FREE(frame);
 124                         return NULL;
 125                 }
 126                 /*d_printf(">>>open: resolved %s as %s\n", path, targetpath);*/
 127
 128                 status = cli_open(targetcli, targetpath, flags,
 129                                    context->internal->share_mode, &fd);
 130                 if (!NT_STATUS_IS_OK(status)) {
 131
 132                         /* Handle the error ... */
 133
 134                         SAFE_FREE(file);
 135                         errno = SMBC_errno(context, targetcli);
 136                         TALLOC_FREE(frame);
 137                         return NULL;
 138                 }
 139
 140                 /* Fill in file struct */
 141
 142                 file->cli_fd  = fd;
 143                 file->fname   = SMB_STRDUP(fname);
 144                 file->srv     = srv;
 145                 file->offset  = 0;
 146                 file->file    = True;
 147
 148                 DLIST_ADD(context->internal->files, file);
 149
 150                 /*
 151                  * If the file was opened in O_APPEND mode, all write
 152                  * operations should be appended to the file.  To do that,
 153                  * though, using this protocol, would require a getattrE()
 154                  * call for each and every write, to determine where the end
 155                  * of the file is. (There does not appear to be an append flag
 156                  * in the protocol.)  Rather than add all of that overhead of
 157                  * retrieving the current end-of-file offset prior to each
 158                  * write operation, we'll assume that most append operations
 159                  * will continuously write, so we'll just set the offset to
 160                  * the end of the file now and hope that's adequate.
 161                  *
 162                  * Note to self: If this proves inadequate, and O_APPEND
 163                  * should, in some cases, be forced for each write, add a
 164                  * field in the context options structure, for
 165                  * "strict_append_mode" which would select between the current
 166                  * behavior (if FALSE) or issuing a getattrE() prior to each
 167                  * write and forcing the write to the end of the file (if
 168                  * TRUE).  Adding that capability will likely require adding
 169                  * an "append" flag into the _SMBCFILE structure to track
 170                  * whether a file was opened in O_APPEND mode.  -- djl
 171                  */
 172                 if (flags & O_APPEND) {
 173                         if (SMBC_lseek_ctx(context, file, 0, SEEK_END) < 0) {
 174                                 (void) SMBC_close_ctx(context, file);
 175                                 errno = ENXIO;
 176                                 TALLOC_FREE(frame);
 177                                 return NULL;
 178                         }
 179                 }
 180
 181                 TALLOC_FREE(frame);
 182                 return file;
 183         }
 184
 185         /* Check if opendir needed ... */
 186
 187         if (!NT_STATUS_IS_OK(status)) {
 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         errno = EINVAL; /* FIXME, correct errno ? */
 198         TALLOC_FREE(frame);
 199         return NULL;
 200 }
 201
 202 /*
 203  * Routine to create a file
 204  */
 205
 206 SMBCFILE *
 207 SMBC_creat_ctx(SMBCCTX *context,
 208                const char *path,
 209                mode_t mode)
 210 {
 211         if (!context || !context->internal->initialized) {
 212                 errno = EINVAL;
 213                 return NULL;
 214         }
 215
 216         return SMBC_open_ctx(context, path,
 217                              O_WRONLY | O_CREAT | O_TRUNC, mode);
 218 }
 219
 220 /*
 221  * Routine to read() a file ...
 222  */
 223
 224 ssize_t
 225 SMBC_read_ctx(SMBCCTX *context,
 226               SMBCFILE *file,
 227               void *buf,
 228               size_t count)
 229 {
 230         size_t ret;
 231         char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
 232         char *path = NULL;
 233         char *targetpath = NULL;
 234         struct cli_state *targetcli = NULL;
 235         uint16_t port = 0;
 236         TALLOC_CTX *frame = talloc_stackframe();
 237         NTSTATUS status;
 238
 239         /*
 240          * offset:
 241          *
 242          * Compiler bug (possibly) -- gcc (GCC) 3.3.5 (Debian 1:3.3.5-2) --
 243          * appears to pass file->offset (which is type off_t) differently than
 244          * a local variable of type off_t.  Using local variable "offset" in
 245          * the call to cli_read() instead of file->offset fixes a problem
 246          * retrieving data at an offset greater than 4GB.
 247          */
 248         off_t offset;
 249
 250         if (!context || !context->internal->initialized) {
 251                 errno = EINVAL;
 252                 TALLOC_FREE(frame);
 253                 return -1;
 254         }
 255
 256         DEBUG(4, ("smbc_read(%p, %d)\n", file, (int)count));
 257
 258         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 259                 errno = EBADF;
 260                 TALLOC_FREE(frame);
 261                 return -1;
 262         }
 263
 264         offset = file->offset;
 265
 266         /* Check that the buffer exists ... */
 267
 268         if (buf == NULL) {
 269                 errno = EINVAL;
 270                 TALLOC_FREE(frame);
 271                 return -1;
 272         }
 273
 274         /*d_printf(">>>read: parsing %s\n", file->fname);*/
 275         if (SMBC_parse_path(frame,
 276                             context,
 277                             file->fname,
 278                             NULL,
 279                             &server,
 280                             &port,
 281                             &share,
 282                             &path,
 283                             &user,
 284                             &password,
 285                             NULL)) {
 286                 errno = EINVAL;
 287                 TALLOC_FREE(frame);
 288                 return -1;
 289         }
 290
 291         /*d_printf(">>>read: resolving %s\n", path);*/
 292         status = cli_resolve_path(frame, "", context->internal->auth_info,
 293                                   file->srv->cli, path,
 294                                   &targetcli, &targetpath);
 295         if (!NT_STATUS_IS_OK(status)) {
 296                 d_printf("Could not resolve %s\n", path);
 297                 errno = ENOENT;
 298                 TALLOC_FREE(frame);
 299                 return -1;
 300         }
 301         /*d_printf(">>>fstat: resolved path as %s\n", targetpath);*/
 302
 303         status = cli_read(targetcli, file->cli_fd, (char *)buf, offset,
 304                           count, &ret);
 305         if (!NT_STATUS_IS_OK(status)) {
 306                 errno = SMBC_errno(context, targetcli);
 307                 TALLOC_FREE(frame);
 308                 return -1;
 309         }
 310
 311         file->offset += ret;
 312
 313         DEBUG(4, ("  --> %ld\n", (unsigned long)ret));
 314
 315         TALLOC_FREE(frame);
 316         return ret;  /* Success, ret bytes of data ... */
 317 }
 318
 319 /*
 320  * Routine to write() a file ...
 321  */
 322
 323 ssize_t
 324 SMBC_write_ctx(SMBCCTX *context,
 325                SMBCFILE *file,
 326                const void *buf,
 327                size_t count)
 328 {
 329         off_t offset;
 330         char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
 331         char *path = NULL;
 332         char *targetpath = NULL;
 333         struct cli_state *targetcli = NULL;
 334         uint16_t port = 0;
 335         TALLOC_CTX *frame = talloc_stackframe();
 336         NTSTATUS status;
 337
 338         /* First check all pointers before dereferencing them */
 339
 340         if (!context || !context->internal->initialized) {
 341                 errno = EINVAL;
 342                 TALLOC_FREE(frame);
 343                 return -1;
 344         }
 345
 346         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 347                 errno = EBADF;
 348                 TALLOC_FREE(frame);
 349                 return -1;
 350         }
 351
 352         /* Check that the buffer exists ... */
 353
 354         if (buf == NULL) {
 355                 errno = EINVAL;
 356                 TALLOC_FREE(frame);
 357                 return -1;
 358         }
 359
 360         offset = file->offset; /* See "offset" comment in SMBC_read_ctx() */
 361
 362         /*d_printf(">>>write: parsing %s\n", file->fname);*/
 363         if (SMBC_parse_path(frame,
 364                             context,
 365                             file->fname,
 366                             NULL,
 367                             &server,
 368                             &port,
 369                             &share,
 370                             &path,
 371                             &user,
 372                             &password,
 373                             NULL)) {
 374                 errno = EINVAL;
 375                 TALLOC_FREE(frame);
 376                 return -1;
 377         }
 378
 379         /*d_printf(">>>write: resolving %s\n", path);*/
 380         status = cli_resolve_path(frame, "", context->internal->auth_info,
 381                                   file->srv->cli, path,
 382                                   &targetcli, &targetpath);
 383         if (!NT_STATUS_IS_OK(status)) {
 384                 d_printf("Could not resolve %s\n", path);
 385                 errno = ENOENT;
 386                 TALLOC_FREE(frame);
 387                 return -1;
 388         }
 389         /*d_printf(">>>write: resolved path as %s\n", targetpath);*/
 390
 391         status = cli_writeall(targetcli, file->cli_fd,
 392                               0, (const uint8_t *)buf, offset, count, NULL);
 393         if (!NT_STATUS_IS_OK(status)) {
 394                 errno = map_errno_from_nt_status(status);
 395                 TALLOC_FREE(frame);
 396                 return -1;
 397         }
 398
 399         file->offset += count;
 400
 401         TALLOC_FREE(frame);
 402         return count;  /* Success, 0 bytes of data ... */
 403 }
 404
 405 /*
 406  * Routine to close() a file ...
 407  */
 408
 409 int
 410 SMBC_close_ctx(SMBCCTX *context,
 411                SMBCFILE *file)
 412 {
 413         SMBCSRV *srv;
 414         char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
 415         char *path = NULL;
 416         char *targetpath = NULL;
 417         uint16_t port = 0;
 418         struct cli_state *targetcli = NULL;
 419         TALLOC_CTX *frame = talloc_stackframe();
 420         NTSTATUS status;
 421
 422         if (!context || !context->internal->initialized) {
 423                 errno = EINVAL;
 424                 TALLOC_FREE(frame);
 425                 return -1;
 426         }
 427
 428         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 429                 errno = EBADF;
 430                 TALLOC_FREE(frame);
 431                 return -1;
 432         }
 433
 434         /* IS a dir ... */
 435         if (!file->file) {
 436                 TALLOC_FREE(frame);
 437                 return smbc_getFunctionClosedir(context)(context, file);
 438         }
 439
 440         /*d_printf(">>>close: parsing %s\n", file->fname);*/
 441         if (SMBC_parse_path(frame,
 442                             context,
 443                             file->fname,
 444                             NULL,
 445                             &server,
 446                             &port,
 447                             &share,
 448                             &path,
 449                             &user,
 450                             &password,
 451                             NULL)) {
 452                 errno = EINVAL;
 453                 TALLOC_FREE(frame);
 454                 return -1;
 455         }
 456
 457         /*d_printf(">>>close: resolving %s\n", path);*/
 458         status = cli_resolve_path(frame, "", context->internal->auth_info,
 459                                   file->srv->cli, path,
 460                                   &targetcli, &targetpath);
 461         if (!NT_STATUS_IS_OK(status)) {
 462                 d_printf("Could not resolve %s\n", path);
 463                 errno = ENOENT;
 464                 TALLOC_FREE(frame);
 465                 return -1;
 466         }
 467         /*d_printf(">>>close: resolved path as %s\n", targetpath);*/
 468
 469         if (!NT_STATUS_IS_OK(cli_close(targetcli, file->cli_fd))) {
 470                 DEBUG(3, ("cli_close failed on %s. purging server.\n",
 471                           file->fname));
 472                 /* Deallocate slot and remove the server
 473                  * from the server cache if unused */
 474                 errno = SMBC_errno(context, targetcli);
 475                 srv = file->srv;
 476                 DLIST_REMOVE(context->internal->files, file);
 477                 SAFE_FREE(file->fname);
 478                 SAFE_FREE(file);
 479                 smbc_getFunctionRemoveUnusedServer(context)(context, srv);
 480                 TALLOC_FREE(frame);
 481                 return -1;
 482         }
 483
 484         DLIST_REMOVE(context->internal->files, file);
 485         SAFE_FREE(file->fname);
 486         SAFE_FREE(file);
 487         TALLOC_FREE(frame);
 488         return 0;
 489 }
 490
 491 /*
 492  * Get info from an SMB server on a file. Use a qpathinfo call first
 493  * and if that fails, use getatr, as Win95 sometimes refuses qpathinfo
 494  */
 495 bool
 496 SMBC_getatr(SMBCCTX * context,
 497             SMBCSRV *srv,
 498             const char *path,
 499             uint16 *mode,
 500             off_t *size,
 501             struct timespec *create_time_ts,
 502             struct timespec *access_time_ts,
 503             struct timespec *write_time_ts,
 504             struct timespec *change_time_ts,
 505             SMB_INO_T *ino)
 506 {
 507         char *fixedpath = NULL;
 508         char *targetpath = NULL;
 509         struct cli_state *targetcli = NULL;
 510         time_t write_time;
 511         TALLOC_CTX *frame = talloc_stackframe();
 512         NTSTATUS status;
 513
 514         if (!context || !context->internal->initialized) {
 515                 errno = EINVAL;
 516                 TALLOC_FREE(frame);
 517                 return False;
 518         }
 519
 520         /* path fixup for . and .. */
 521         if (strequal(path, ".") || strequal(path, "..")) {
 522                 fixedpath = talloc_strdup(frame, "\\");
 523                 if (!fixedpath) {
 524                         errno = ENOMEM;
 525                         TALLOC_FREE(frame);
 526                         return False;
 527                 }
 528         } else {
 529                 fixedpath = talloc_strdup(frame, path);
 530                 if (!fixedpath) {
 531                         errno = ENOMEM;
 532                         TALLOC_FREE(frame);
 533                         return False;
 534                 }
 535                 trim_string(fixedpath, NULL, "\\..");
 536                 trim_string(fixedpath, NULL, "\\.");
 537         }
 538         DEBUG(4,("SMBC_getatr: sending qpathinfo\n"));
 539
 540         status = cli_resolve_path(frame, "", context->internal->auth_info,
 541                                   srv->cli, fixedpath,
 542                                   &targetcli, &targetpath);
 543         if (!NT_STATUS_IS_OK(status)) {
 544                 d_printf("Couldn't resolve %s\n", path);
 545                 errno = ENOENT;
 546                 TALLOC_FREE(frame);
 547                 return False;
 548         }
 549
 550         if (!srv->no_pathinfo2 &&
 551             NT_STATUS_IS_OK(cli_qpathinfo2(targetcli, targetpath,
 552                            create_time_ts,
 553                            access_time_ts,
 554                            write_time_ts,
 555                            change_time_ts,
 556                            size, mode, ino))) {
 557                 TALLOC_FREE(frame);
 558                 return True;
 559         }
 560
 561         /* if this is NT then don't bother with the getatr */
 562         if (smb1cli_conn_capabilities(targetcli->conn) & CAP_NT_SMBS) {
 563                 errno = EPERM;
 564                 TALLOC_FREE(frame);
 565                 return False;
 566         }
 567
 568         if (NT_STATUS_IS_OK(cli_getatr(targetcli, targetpath, mode, size, &write_time))) {
 569                 struct timespec w_time_ts;
 570
 571                 w_time_ts = convert_time_t_to_timespec(write_time);
 572                 if (write_time_ts != NULL) {
 573                         *write_time_ts = w_time_ts;
 574                 }
 575                 if (create_time_ts != NULL) {
 576                         *create_time_ts = w_time_ts;
 577                 }
 578                 if (access_time_ts != NULL) {
 579                         *access_time_ts = w_time_ts;
 580                 }
 581                 if (change_time_ts != NULL) {
 582                         *change_time_ts = w_time_ts;
 583                 }
 584                 srv->no_pathinfo2 = True;
 585                 TALLOC_FREE(frame);
 586                 return True;
 587         }
 588
 589         errno = EPERM;
 590         TALLOC_FREE(frame);
 591         return False;
 592 }
 593
 594 /*
 595  * Set file info on an SMB server.  Use setpathinfo call first.  If that
 596  * fails, use setattrE..
 597  *
 598  * Access and modification time parameters are always used and must be
 599  * provided.  Create time, if zero, will be determined from the actual create
 600  * time of the file.  If non-zero, the create time will be set as well.
 601  *
 602  * "mode" (attributes) parameter may be set to -1 if it is not to be set.
 603  */
 604 bool
 605 SMBC_setatr(SMBCCTX * context, SMBCSRV *srv, char *path,
 606             time_t create_time,
 607             time_t access_time,
 608             time_t write_time,
 609             time_t change_time,
 610             uint16 mode)
 611 {
 612         uint16_t fd;
 613         int ret;
 614         TALLOC_CTX *frame = talloc_stackframe();
 615
 616         /*
 617          * First, try setpathinfo (if qpathinfo succeeded), for it is the
 618          * modern function for "new code" to be using, and it works given a
 619          * filename rather than requiring that the file be opened to have its
 620          * attributes manipulated.
 621          */
 622         if (srv->no_pathinfo ||
 623             !NT_STATUS_IS_OK(cli_setpathinfo_basic(srv->cli, path,
 624                                                    create_time,
 625                                                    access_time,
 626                                                    write_time,
 627                                                    change_time,
 628                                                    mode))) {
 629
 630                 /*
 631                  * setpathinfo is not supported; go to plan B.
 632                  *
 633                  * cli_setatr() does not work on win98, and it also doesn't
 634                  * support setting the access time (only the modification
 635                  * time), so in all cases, we open the specified file and use
 636                  * cli_setattrE() which should work on all OS versions, and
 637                  * supports both times.
 638                  */
 639
 640                 /* Don't try {q,set}pathinfo() again, with this server */
 641                 srv->no_pathinfo = True;
 642
 643                 /* Open the file */
 644                 if (!NT_STATUS_IS_OK(cli_open(srv->cli, path, O_RDWR, DENY_NONE, &fd))) {
 645                         errno = SMBC_errno(context, srv->cli);
 646                         TALLOC_FREE(frame);
 647                         return -1;
 648                 }
 649
 650                 /* Set the new attributes */
 651                 ret = NT_STATUS_IS_OK(cli_setattrE(srv->cli, fd,
 652                                    change_time,
 653                                    access_time,
 654                                    write_time));
 655
 656                 /* Close the file */
 657                 cli_close(srv->cli, fd);
 658
 659                 /*
 660                  * Unfortunately, setattrE() doesn't have a provision for
 661                  * setting the access mode (attributes).  We'll have to try
 662                  * cli_setatr() for that, and with only this parameter, it
 663                  * seems to work on win98.
 664                  */
 665                 if (ret && mode != (uint16) -1) {
 666                         ret = NT_STATUS_IS_OK(cli_setatr(srv->cli, path, mode, 0));
 667                 }
 668
 669                 if (! ret) {
 670                         errno = SMBC_errno(context, srv->cli);
 671                         TALLOC_FREE(frame);
 672                         return False;
 673                 }
 674         }
 675
 676         TALLOC_FREE(frame);
 677         return True;
 678 }
 679
 680 /*
 681  * A routine to lseek() a file
 682  */
 683
 684 off_t
 685 SMBC_lseek_ctx(SMBCCTX *context,
 686                SMBCFILE *file,
 687                off_t offset,
 688                int whence)
 689 {
 690         off_t size;
 691         char *server = NULL, *share = NULL, *user = NULL, *password = NULL;
 692         char *path = NULL;
 693         char *targetpath = NULL;
 694         struct cli_state *targetcli = NULL;
 695         uint16_t port = 0;
 696         TALLOC_CTX *frame = talloc_stackframe();
 697         NTSTATUS status;
 698
 699         if (!context || !context->internal->initialized) {
 700                 errno = EINVAL;
 701                 TALLOC_FREE(frame);
 702                 return -1;
 703         }
 704
 705         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 706                 errno = EBADF;
 707                 TALLOC_FREE(frame);
 708                 return -1;
 709         }
 710
 711         if (!file->file) {
 712                 errno = EINVAL;
 713                 TALLOC_FREE(frame);
 714                 return -1;      /* Can't lseek a dir ... */
 715         }
 716
 717         switch (whence) {
 718         case SEEK_SET:
 719                 file->offset = offset;
 720                 break;
 721         case SEEK_CUR:
 722                 file->offset += offset;
 723                 break;
 724         case SEEK_END:
 725                 /*d_printf(">>>lseek: parsing %s\n", file->fname);*/
 726                 if (SMBC_parse_path(frame,
 727                                     context,
 728                                     file->fname,
 729                                     NULL,
 730                                     &server,
 731                                     &port,
 732                                     &share,
 733                                     &path,
 734                                     &user,
 735                                     &password,
 736                                     NULL)) {
 737                         errno = EINVAL;
 738                         TALLOC_FREE(frame);
 739                         return -1;
 740                 }
 741
 742                 /*d_printf(">>>lseek: resolving %s\n", path);*/
 743                 status = cli_resolve_path(
 744                         frame, "", context->internal->auth_info,
 745                         file->srv->cli, path, &targetcli, &targetpath);
 746                 if (!NT_STATUS_IS_OK(status)) {
 747                         d_printf("Could not resolve %s\n", path);
 748                         errno = ENOENT;
 749                         TALLOC_FREE(frame);
 750                         return -1;
 751                 }
 752
 753                 /*d_printf(">>>lseek: resolved path as %s\n", targetpath);*/
 754                 if (!NT_STATUS_IS_OK(cli_qfileinfo_basic(
 755                                              targetcli, file->cli_fd, NULL,
 756                                              &size, NULL, NULL, NULL, NULL,
 757                                              NULL))) {
 758                         off_t b_size = size;
 759                         if (!NT_STATUS_IS_OK(cli_getattrE(targetcli, file->cli_fd,
 760                                           NULL, &b_size, NULL, NULL, NULL))) {
 761                                 errno = EINVAL;
 762                                 TALLOC_FREE(frame);
 763                                 return -1;
 764                         } else
 765                                 size = b_size;
 766                 }
 767                 file->offset = size + offset;
 768                 break;
 769         default:
 770                 errno = EINVAL;
 771                 break;
 772         }
 773
 774         TALLOC_FREE(frame);
 775         return file->offset;
 776 }
 777
 778
 779 /*
 780  * Routine to truncate a file given by its file descriptor, to a specified size
 781  */
 782
 783 int
 784 SMBC_ftruncate_ctx(SMBCCTX *context,
 785                    SMBCFILE *file,
 786                    off_t length)
 787 {
 788         off_t size = length;
 789         char *server = NULL;
 790         char *share = NULL;
 791         char *user = NULL;
 792         char *password = NULL;
 793         char *path = NULL;
 794         char *targetpath = NULL;
 795         uint16_t port = 0;
 796         struct cli_state *targetcli = NULL;
 797         TALLOC_CTX *frame = talloc_stackframe();
 798         NTSTATUS status;
 799
 800         if (!context || !context->internal->initialized) {
 801                 errno = EINVAL;
 802                 TALLOC_FREE(frame);
 803                 return -1;
 804         }
 805
 806         if (!file || !SMBC_dlist_contains(context->internal->files, file)) {
 807                 errno = EBADF;
 808                 TALLOC_FREE(frame);
 809                 return -1;
 810         }
 811
 812         if (!file->file) {
 813                 errno = EINVAL;
 814                 TALLOC_FREE(frame);
 815                 return -1;
 816         }
 817
 818         /*d_printf(">>>fstat: parsing %s\n", file->fname);*/
 819         if (SMBC_parse_path(frame,
 820                             context,
 821                             file->fname,
 822                             NULL,
 823                             &server,
 824                             &port,
 825                             &share,
 826                             &path,
 827                             &user,
 828                             &password,
 829                             NULL)) {
 830                 errno = EINVAL;
 831                 TALLOC_FREE(frame);
 832                 return -1;
 833         }
 834
 835         /*d_printf(">>>fstat: resolving %s\n", path);*/
 836         status = cli_resolve_path(frame, "", context->internal->auth_info,
 837                                   file->srv->cli, path,
 838                                   &targetcli, &targetpath);
 839         if (!NT_STATUS_IS_OK(status)) {
 840                 d_printf("Could not resolve %s\n", path);
 841                 errno = ENOENT;
 842                 TALLOC_FREE(frame);
 843                 return -1;
 844         }
 845         /*d_printf(">>>fstat: resolved path as %s\n", targetpath);*/
 846
 847         if (!NT_STATUS_IS_OK(cli_ftruncate(targetcli, file->cli_fd, (uint64_t)size))) {
 848                 errno = EINVAL;
 849                 TALLOC_FREE(frame);
 850                 return -1;
 851         }
 852
 853         TALLOC_FREE(frame);
 854         return 0;
 855 }