source/smbwrapper/smbw_dir.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB wrapper directory functions
   4    Copyright (C) Andrew Tridgell 1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22 #include "realcalls.h"
  23
  24 extern pstring smbw_cwd;
  25 extern fstring smbw_prefix;
  26
  27 static struct smbw_dir *smbw_dirs;
  28
  29 extern struct bitmap *smbw_file_bmap;
  30
  31 extern int smbw_busy;
  32
  33 /*****************************************************
  34 map a fd to a smbw_dir structure
  35 *******************************************************/
  36 struct smbw_dir *smbw_dir(int fd)
  37 {
  38         struct smbw_dir *dir;
  39
  40         for (dir=smbw_dirs;dir;dir=dir->next) {
  41                 if (dir->fd == fd) return dir;
  42         }
  43         return NULL;
  44 }
  45
  46 /*****************************************************
  47 check if a DIR* is one of ours
  48 *******************************************************/
  49 int smbw_dirp(DIR *dirp)
  50 {
  51         struct smbw_dir *d = (struct smbw_dir *)dirp;
  52         struct smbw_dir *dir;
  53
  54         for (dir=smbw_dirs;dir;dir=dir->next) {
  55                 if (dir == d) return 1;
  56         }
  57         return 0;
  58 }
  59
  60 /*****************************************************
  61 free a smbw_dir structure and all entries
  62 *******************************************************/
  63 static void free_dir(struct smbw_dir *dir)
  64 {
  65         if(!dir) return;
  66
  67         SAFE_FREE(dir->list);
  68         SAFE_FREE(dir->path);
  69         ZERO_STRUCTP(dir);
  70         SAFE_FREE(dir);
  71 }
  72
  73 static struct smbw_dir *cur_dir;
  74
  75 /*****************************************************
  76 add a entry to a directory listing
  77 *******************************************************/
  78 static void smbw_dir_add(struct file_info *finfo, const char *mask,
  79                          void *state)
  80 {
  81         struct file_info *cdl;
  82
  83         DEBUG(5,("%s\n", finfo->name));
  84
  85         if (cur_dir->malloced == cur_dir->count) {
  86                 cdl = (struct file_info *)Realloc(cur_dir->list,
  87                                                             sizeof(cur_dir->list[0])*
  88                                                             (cur_dir->count+100));
  89                 if (!cdl) {
  90                         /* oops */
  91                         return;
  92                 }
  93                 cur_dir->list = cdl;
  94                 cur_dir->malloced += 100;
  95         }
  96
  97         cur_dir->list[cur_dir->count] = *finfo;
  98         cur_dir->count++;
  99 }
 100
 101 /*****************************************************
 102 add a entry to a directory listing
 103 *******************************************************/
 104 static void smbw_share_add(const char *share, uint32 type,
 105                            const char *comment, void *state)
 106 {
 107         struct file_info finfo;
 108
 109         if (strcmp(share,"IPC$") == 0) return;
 110
 111         ZERO_STRUCT(finfo);
 112
 113         pstrcpy(finfo.name, share);
 114         finfo.mode = aRONLY | aDIR;
 115
 116         smbw_dir_add(&finfo, NULL, NULL);
 117 }
 118
 119
 120 /*****************************************************
 121 add a server to a directory listing
 122 *******************************************************/
 123 static void smbw_server_add(const char *name, uint32 type,
 124                             const char *comment, void *state)
 125 {
 126         struct file_info finfo;
 127
 128         ZERO_STRUCT(finfo);
 129
 130         pstrcpy(finfo.name, name);
 131         finfo.mode = aRONLY | aDIR;
 132
 133         smbw_dir_add(&finfo, NULL, NULL);
 134 }
 135
 136
 137 /*****************************************************
 138 add a entry to a directory listing
 139 *******************************************************/
 140 static void smbw_printjob_add(struct print_job_info *job)
 141 {
 142         struct file_info finfo;
 143
 144         ZERO_STRUCT(finfo);
 145
 146         pstrcpy(finfo.name, job->name);
 147         finfo.mode = aRONLY | aDIR;
 148         finfo.mtime = job->t;
 149         finfo.atime = job->t;
 150         finfo.ctime = job->t;
 151         finfo.uid = nametouid(job->user);
 152         finfo.mode = aRONLY;
 153         finfo.size = job->size;
 154
 155         smbw_dir_add(&finfo, NULL, NULL);
 156 }
 157
 158
 159 /*****************************************************
 160 open a directory on the server
 161 *******************************************************/
 162 int smbw_dir_open(const char *fname)
 163 {
 164         fstring server, share;
 165         pstring path;
 166         struct smbw_server *srv=NULL;
 167         struct smbw_dir *dir=NULL;
 168         pstring mask;
 169         int fd;
 170         char *s, *p;
 171
 172         if (!fname) {
 173                 errno = EINVAL;
 174                 return -1;
 175         }
 176
 177         smbw_init();
 178
 179         /* work out what server they are after */
 180         s = smbw_parse_path(fname, server, share, path);
 181
 182         DEBUG(4,("dir_open share=%s\n", share));
 183
 184         /* get a connection to the server */
 185         srv = smbw_server(server, share);
 186         if (!srv) {
 187                 /* smbw_server sets errno */
 188                 goto failed;
 189         }
 190
 191         dir = (struct smbw_dir *)malloc(sizeof(*dir));
 192         if (!dir) {
 193                 errno = ENOMEM;
 194                 goto failed;
 195         }
 196
 197         ZERO_STRUCTP(dir);
 198
 199         cur_dir = dir;
 200
 201         slprintf(mask, sizeof(mask)-1, "%s\\*", path);
 202         all_string_sub(mask,"\\\\","\\",0);
 203
 204         if ((p=strstr(srv->server_name,"#01"))) {
 205                 *p = 0;
 206                 smbw_server_add(".",0,"", NULL);
 207                 smbw_server_add("..",0,"", NULL);
 208                 smbw_NetServerEnum(&srv->cli, srv->server_name,
 209                                    SV_TYPE_DOMAIN_ENUM, smbw_server_add, NULL);
 210                 *p = '#';
 211         } else if ((p=strstr(srv->server_name,"#1D"))) {
 212                 DEBUG(4,("doing NetServerEnum\n"));
 213                 *p = 0;
 214                 smbw_server_add(".",0,"", NULL);
 215                 smbw_server_add("..",0,"", NULL);
 216                 smbw_NetServerEnum(&srv->cli, srv->server_name, SV_TYPE_ALL,
 217                                    smbw_server_add, NULL);
 218                 *p = '#';
 219         } else if (strcmp(srv->cli.dev,"IPC") == 0) {
 220                 DEBUG(4,("doing NetShareEnum\n"));
 221                 smbw_share_add(".",0,"", NULL);
 222                 smbw_share_add("..",0,"", NULL);
 223                 if (smbw_RNetShareEnum(&srv->cli, smbw_share_add, NULL) < 0) {
 224                         errno = smbw_errno(&srv->cli);
 225                         goto failed;
 226                 }
 227         } else if (strncmp(srv->cli.dev,"LPT",3) == 0) {
 228                 smbw_share_add(".",0,"", NULL);
 229                 smbw_share_add("..",0,"", NULL);
 230                 if (cli_print_queue(&srv->cli, smbw_printjob_add) < 0) {
 231                         errno = smbw_errno(&srv->cli);
 232                         goto failed;
 233                 }
 234         } else {
 235 #if 0
 236                 if (strcmp(path,"\\") == 0) {
 237                         smbw_share_add(".",0,"");
 238                         smbw_share_add("..",0,"");
 239                 }
 240 #endif
 241                 if (cli_list(&srv->cli, mask, aHIDDEN|aSYSTEM|aDIR,
 242                              smbw_dir_add, NULL) < 0) {
 243                         errno = smbw_errno(&srv->cli);
 244                         goto failed;
 245                 }
 246         }
 247
 248         cur_dir = NULL;
 249
 250         fd = open(SMBW_DUMMY, O_WRONLY);
 251         if (fd == -1) {
 252                 errno = EMFILE;
 253                 goto failed;
 254         }
 255
 256         if (bitmap_query(smbw_file_bmap, fd)) {
 257                 DEBUG(0,("ERROR: fd used in smbw_dir_open\n"));
 258                 errno = EIO;
 259                 goto failed;
 260         }
 261
 262         DLIST_ADD(smbw_dirs, dir);
 263
 264         bitmap_set(smbw_file_bmap, fd);
 265
 266         dir->fd = fd;
 267         dir->srv = srv;
 268         dir->path = strdup(s);
 269
 270         DEBUG(4,("  -> %d\n", dir->count));
 271
 272         return dir->fd;
 273
 274  failed:
 275         free_dir(dir);
 276
 277         return -1;
 278 }
 279
 280 /*****************************************************
 281 a wrapper for fstat() on a directory
 282 *******************************************************/
 283 int smbw_dir_fstat(int fd, struct stat *st)
 284 {
 285         struct smbw_dir *dir;
 286
 287         dir = smbw_dir(fd);
 288         if (!dir) {
 289                 errno = EBADF;
 290                 return -1;
 291         }
 292
 293         ZERO_STRUCTP(st);
 294
 295         smbw_setup_stat(st, "", dir->count*DIRP_SIZE, aDIR);
 296
 297         st->st_dev = dir->srv->dev;
 298
 299         return 0;
 300 }
 301
 302 /*****************************************************
 303 close a directory handle
 304 *******************************************************/
 305 int smbw_dir_close(int fd)
 306 {
 307         struct smbw_dir *dir;
 308
 309         dir = smbw_dir(fd);
 310         if (!dir) {
 311                 errno = EBADF;
 312                 return -1;
 313         }
 314
 315         bitmap_clear(smbw_file_bmap, dir->fd);
 316         close(dir->fd);
 317
 318         DLIST_REMOVE(smbw_dirs, dir);
 319
 320         free_dir(dir);
 321
 322         return 0;
 323 }
 324
 325 /*****************************************************
 326 a wrapper for getdents()
 327 *******************************************************/
 328 int smbw_getdents(unsigned int fd, struct dirent *dirp, int count)
 329 {
 330         struct smbw_dir *dir;
 331         int n=0;
 332
 333         smbw_busy++;
 334
 335         dir = smbw_dir(fd);
 336         if (!dir) {
 337                 errno = EBADF;
 338                 smbw_busy--;
 339                 return -1;
 340         }
 341
 342         while (count>=DIRP_SIZE && (dir->offset < dir->count)) {
 343 #if HAVE_DIRENT_D_OFF
 344                 dirp->d_off = (dir->offset+1)*DIRP_SIZE;
 345 #endif
 346                 dirp->d_reclen = DIRP_SIZE;
 347                 fstrcpy(&dirp->d_name[0], dir->list[dir->offset].name);
 348                 dirp->d_ino = smbw_inode(dir->list[dir->offset].name);
 349                 dir->offset++;
 350                 count -= dirp->d_reclen;
 351 #if HAVE_DIRENT_D_OFF
 352                 if (dir->offset == dir->count) {
 353                         dirp->d_off = -1;
 354                 }
 355 #endif
 356                 dirp = (struct dirent *)(((char *)dirp) + DIRP_SIZE);
 357                 n++;
 358         }
 359
 360         smbw_busy--;
 361         return n*DIRP_SIZE;
 362 }
 363
 364
 365 /*****************************************************
 366 a wrapper for chdir()
 367 *******************************************************/
 368 int smbw_chdir(const char *name)
 369 {
 370         struct smbw_server *srv;
 371         fstring server, share;
 372         pstring path;
 373         uint16 mode = aDIR;
 374         char *cwd;
 375         int len;
 376
 377         smbw_init();
 378
 379         len = strlen(smbw_prefix);
 380
 381         if (smbw_busy) return real_chdir(name);
 382
 383         smbw_busy++;
 384
 385         if (!name) {
 386                 errno = EINVAL;
 387                 goto failed;
 388         }
 389
 390         DEBUG(4,("smbw_chdir(%s)\n", name));
 391
 392         /* work out what server they are after */
 393         cwd = smbw_parse_path(name, server, share, path);
 394
 395         /* a special case - accept cd to /smb */
 396         if (strncmp(cwd, smbw_prefix, len-1) == 0 &&
 397             cwd[len-1] == 0) {
 398                 goto success1;
 399         }
 400
 401         if (strncmp(cwd,smbw_prefix,strlen(smbw_prefix))) {
 402                 if (real_chdir(cwd) == 0) {
 403                         goto success2;
 404                 }
 405                 goto failed;
 406         }
 407
 408         /* get a connection to the server */
 409         srv = smbw_server(server, share);
 410         if (!srv) {
 411                 /* smbw_server sets errno */
 412                 goto failed;
 413         }
 414
 415         if (strncmp(srv->cli.dev,"IPC",3) &&
 416             strncmp(srv->cli.dev,"LPT",3) &&
 417             !smbw_getatr(srv, path,
 418                          &mode, NULL, NULL, NULL, NULL, NULL)) {
 419                 errno = smbw_errno(&srv->cli);
 420                 goto failed;
 421         }
 422
 423         if (!(mode & aDIR)) {
 424                 errno = ENOTDIR;
 425                 goto failed;
 426         }
 427
 428  success1:
 429         /* we don't want the old directory to be busy */
 430         real_chdir("/");
 431
 432  success2:
 433
 434         DEBUG(4,("set SMBW_CWD to %s\n", cwd));
 435
 436         pstrcpy(smbw_cwd, cwd);
 437
 438         smbw_busy--;
 439         return 0;
 440
 441  failed:
 442         smbw_busy--;
 443         return -1;
 444 }
 445
 446
 447 /*****************************************************
 448 a wrapper for lseek() on directories
 449 *******************************************************/
 450 off_t smbw_dir_lseek(int fd, off_t offset, int whence)
 451 {
 452         struct smbw_dir *dir;
 453         off_t ret;
 454
 455         dir = smbw_dir(fd);
 456         if (!dir) {
 457                 errno = EBADF;
 458                 return -1;
 459         }
 460
 461         switch (whence) {
 462         case SEEK_SET:
 463                 dir->offset = offset/DIRP_SIZE;
 464                 break;
 465         case SEEK_CUR:
 466                 dir->offset += offset/DIRP_SIZE;
 467                 break;
 468         case SEEK_END:
 469                 dir->offset = (dir->count * DIRP_SIZE) + offset;
 470                 dir->offset /= DIRP_SIZE;
 471                 break;
 472         }
 473
 474         ret = dir->offset * DIRP_SIZE;
 475
 476         DEBUG(4,("   -> %d\n", (int)ret));
 477
 478         return ret;
 479 }
 480
 481
 482 /*****************************************************
 483 a wrapper for mkdir()
 484 *******************************************************/
 485 int smbw_mkdir(const char *fname, mode_t mode)
 486 {
 487         struct smbw_server *srv;
 488         fstring server, share;
 489         pstring path;
 490
 491         if (!fname) {
 492                 errno = EINVAL;
 493                 return -1;
 494         }
 495
 496         smbw_init();
 497
 498         smbw_busy++;
 499
 500         /* work out what server they are after */
 501         smbw_parse_path(fname, server, share, path);
 502
 503         /* get a connection to the server */
 504         srv = smbw_server(server, share);
 505         if (!srv) {
 506                 /* smbw_server sets errno */
 507                 goto failed;
 508         }
 509
 510         if (!cli_mkdir(&srv->cli, path)) {
 511                 errno = smbw_errno(&srv->cli);
 512                 goto failed;
 513         }
 514
 515         smbw_busy--;
 516         return 0;
 517
 518  failed:
 519         smbw_busy--;
 520         return -1;
 521 }
 522
 523 /*****************************************************
 524 a wrapper for rmdir()
 525 *******************************************************/
 526 int smbw_rmdir(const char *fname)
 527 {
 528         struct smbw_server *srv;
 529         fstring server, share;
 530         pstring path;
 531
 532         if (!fname) {
 533                 errno = EINVAL;
 534                 return -1;
 535         }
 536
 537         smbw_init();
 538
 539         smbw_busy++;
 540
 541         /* work out what server they are after */
 542         smbw_parse_path(fname, server, share, path);
 543
 544         /* get a connection to the server */
 545         srv = smbw_server(server, share);
 546         if (!srv) {
 547                 /* smbw_server sets errno */
 548                 goto failed;
 549         }
 550
 551         if (!cli_rmdir(&srv->cli, path)) {
 552                 errno = smbw_errno(&srv->cli);
 553                 goto failed;
 554         }
 555
 556         smbw_busy--;
 557         return 0;
 558
 559  failed:
 560         smbw_busy--;
 561         return -1;
 562 }
 563
 564
 565 /*****************************************************
 566 a wrapper for getcwd()
 567 *******************************************************/
 568 char *smbw_getcwd(char *buf, size_t size)
 569 {
 570         smbw_init();
 571
 572         if (smbw_busy) {
 573                 return (char *)real_getcwd(buf, size);
 574         }
 575
 576         smbw_busy++;
 577
 578         if (!buf) {
 579                 if (size <= 0) size = strlen(smbw_cwd)+1;
 580                 buf = (char *)malloc(size);
 581                 if (!buf) {
 582                         errno = ENOMEM;
 583                         smbw_busy--;
 584                         return NULL;
 585                 }
 586         }
 587
 588         if (strlen(smbw_cwd) > size-1) {
 589                 errno = ERANGE;
 590                 smbw_busy--;
 591                 return NULL;
 592         }
 593
 594         safe_strcpy(buf, smbw_cwd, size);
 595
 596         smbw_busy--;
 597         return buf;
 598 }
 599
 600 /*****************************************************
 601 a wrapper for fchdir()
 602 *******************************************************/
 603 int smbw_fchdir(unsigned int fd)
 604 {
 605         struct smbw_dir *dir;
 606         int ret;
 607
 608         smbw_busy++;
 609
 610         dir = smbw_dir(fd);
 611         if (dir) {
 612                 smbw_busy--;
 613                 return chdir(dir->path);
 614         }
 615
 616         ret = real_fchdir(fd);
 617         if (ret == 0) {
 618                 sys_getwd(smbw_cwd);
 619         }
 620
 621         smbw_busy--;
 622         return ret;
 623 }
 624
 625 /*****************************************************
 626 open a directory on the server
 627 *******************************************************/
 628 DIR *smbw_opendir(const char *fname)
 629 {
 630         int fd;
 631
 632         smbw_busy++;
 633
 634         fd = smbw_dir_open(fname);
 635
 636         if (fd == -1) {
 637                 smbw_busy--;
 638                 return NULL;
 639         }
 640
 641         smbw_busy--;
 642
 643         return (DIR *)smbw_dir(fd);
 644 }
 645
 646 /*****************************************************
 647 read one entry from a directory
 648 *******************************************************/
 649 struct dirent *smbw_readdir(DIR *dirp)
 650 {
 651         struct smbw_dir *d = (struct smbw_dir *)dirp;
 652         static union {
 653                 char buf[DIRP_SIZE];
 654                 struct dirent de;
 655         } dbuf;
 656
 657         if (smbw_getdents(d->fd, &dbuf.de, DIRP_SIZE) > 0)
 658                 return &dbuf.de;
 659
 660         return NULL;
 661 }
 662
 663 /*****************************************************
 664 close a DIR*
 665 *******************************************************/
 666 int smbw_closedir(DIR *dirp)
 667 {
 668         struct smbw_dir *d = (struct smbw_dir *)dirp;
 669         return smbw_close(d->fd);
 670 }
 671
 672 /*****************************************************
 673 seek in a directory
 674 *******************************************************/
 675 void smbw_seekdir(DIR *dirp, off_t offset)
 676 {
 677         struct smbw_dir *d = (struct smbw_dir *)dirp;
 678         smbw_dir_lseek(d->fd,offset, SEEK_SET);
 679 }
 680
 681 /*****************************************************
 682 current loc in a directory
 683 *******************************************************/
 684 off_t smbw_telldir(DIR *dirp)
 685 {
 686         struct smbw_dir *d = (struct smbw_dir *)dirp;
 687         return smbw_dir_lseek(d->fd,0,SEEK_CUR);
 688 }