source3/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) || (strequal(share,"IPC$"))) {
 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             !strequal(share, "IPC$") &&
 417             strncmp(srv->cli.dev,"LPT",3) &&
 418             !smbw_getatr(srv, path,
 419                          &mode, NULL, NULL, NULL, NULL, NULL)) {
 420                 errno = smbw_errno(&srv->cli);
 421                 goto failed;
 422         }
 423
 424         if (!(mode & aDIR)) {
 425                 errno = ENOTDIR;
 426                 goto failed;
 427         }
 428
 429  success1:
 430         /* we don't want the old directory to be busy */
 431         real_chdir("/");
 432
 433  success2:
 434
 435         DEBUG(4,("set SMBW_CWD to %s\n", cwd));
 436
 437         pstrcpy(smbw_cwd, cwd);
 438
 439         smbw_busy--;
 440         return 0;
 441
 442  failed:
 443         smbw_busy--;
 444         return -1;
 445 }
 446
 447
 448 /*****************************************************
 449 a wrapper for lseek() on directories
 450 *******************************************************/
 451 off_t smbw_dir_lseek(int fd, off_t offset, int whence)
 452 {
 453         struct smbw_dir *dir;
 454         off_t ret;
 455
 456         dir = smbw_dir(fd);
 457         if (!dir) {
 458                 errno = EBADF;
 459                 return -1;
 460         }
 461
 462         switch (whence) {
 463         case SEEK_SET:
 464                 dir->offset = offset/DIRP_SIZE;
 465                 break;
 466         case SEEK_CUR:
 467                 dir->offset += offset/DIRP_SIZE;
 468                 break;
 469         case SEEK_END:
 470                 dir->offset = (dir->count * DIRP_SIZE) + offset;
 471                 dir->offset /= DIRP_SIZE;
 472                 break;
 473         }
 474
 475         ret = dir->offset * DIRP_SIZE;
 476
 477         DEBUG(4,("   -> %d\n", (int)ret));
 478
 479         return ret;
 480 }
 481
 482
 483 /*****************************************************
 484 a wrapper for mkdir()
 485 *******************************************************/
 486 int smbw_mkdir(const char *fname, mode_t mode)
 487 {
 488         struct smbw_server *srv;
 489         fstring server, share;
 490         pstring path;
 491
 492         if (!fname) {
 493                 errno = EINVAL;
 494                 return -1;
 495         }
 496
 497         smbw_init();
 498
 499         smbw_busy++;
 500
 501         /* work out what server they are after */
 502         smbw_parse_path(fname, server, share, path);
 503
 504         /* get a connection to the server */
 505         srv = smbw_server(server, share);
 506         if (!srv) {
 507                 /* smbw_server sets errno */
 508                 goto failed;
 509         }
 510
 511         if (!cli_mkdir(&srv->cli, path)) {
 512                 errno = smbw_errno(&srv->cli);
 513                 goto failed;
 514         }
 515
 516         smbw_busy--;
 517         return 0;
 518
 519  failed:
 520         smbw_busy--;
 521         return -1;
 522 }
 523
 524 /*****************************************************
 525 a wrapper for rmdir()
 526 *******************************************************/
 527 int smbw_rmdir(const char *fname)
 528 {
 529         struct smbw_server *srv;
 530         fstring server, share;
 531         pstring path;
 532
 533         if (!fname) {
 534                 errno = EINVAL;
 535                 return -1;
 536         }
 537
 538         smbw_init();
 539
 540         smbw_busy++;
 541
 542         /* work out what server they are after */
 543         smbw_parse_path(fname, server, share, path);
 544
 545         /* get a connection to the server */
 546         srv = smbw_server(server, share);
 547         if (!srv) {
 548                 /* smbw_server sets errno */
 549                 goto failed;
 550         }
 551
 552         if (!cli_rmdir(&srv->cli, path)) {
 553                 errno = smbw_errno(&srv->cli);
 554                 goto failed;
 555         }
 556
 557         smbw_busy--;
 558         return 0;
 559
 560  failed:
 561         smbw_busy--;
 562         return -1;
 563 }
 564
 565
 566 /*****************************************************
 567 a wrapper for getcwd()
 568 *******************************************************/
 569 char *smbw_getcwd(char *buf, size_t size)
 570 {
 571         smbw_init();
 572
 573         if (smbw_busy) {
 574                 return (char *)real_getcwd(buf, size);
 575         }
 576
 577         smbw_busy++;
 578
 579         if (!buf) {
 580                 if (size <= 0) size = strlen(smbw_cwd)+1;
 581                 buf = (char *)malloc(size);
 582                 if (!buf) {
 583                         errno = ENOMEM;
 584                         smbw_busy--;
 585                         return NULL;
 586                 }
 587         }
 588
 589         if (strlen(smbw_cwd) > size-1) {
 590                 errno = ERANGE;
 591                 smbw_busy--;
 592                 return NULL;
 593         }
 594
 595         safe_strcpy(buf, smbw_cwd, size);
 596
 597         smbw_busy--;
 598         return buf;
 599 }
 600
 601 /*****************************************************
 602 a wrapper for fchdir()
 603 *******************************************************/
 604 int smbw_fchdir(unsigned int fd)
 605 {
 606         struct smbw_dir *dir;
 607         int ret;
 608
 609         smbw_busy++;
 610
 611         dir = smbw_dir(fd);
 612         if (dir) {
 613                 smbw_busy--;
 614                 return chdir(dir->path);
 615         }
 616
 617         ret = real_fchdir(fd);
 618         if (ret == 0) {
 619                 sys_getwd(smbw_cwd);
 620         }
 621
 622         smbw_busy--;
 623         return ret;
 624 }
 625
 626 /*****************************************************
 627 open a directory on the server
 628 *******************************************************/
 629 DIR *smbw_opendir(const char *fname)
 630 {
 631         int fd;
 632
 633         smbw_busy++;
 634
 635         fd = smbw_dir_open(fname);
 636
 637         if (fd == -1) {
 638                 smbw_busy--;
 639                 return NULL;
 640         }
 641
 642         smbw_busy--;
 643
 644         return (DIR *)smbw_dir(fd);
 645 }
 646
 647 /*****************************************************
 648 read one entry from a directory
 649 *******************************************************/
 650 struct dirent *smbw_readdir(DIR *dirp)
 651 {
 652         struct smbw_dir *d = (struct smbw_dir *)dirp;
 653         static union {
 654                 char buf[DIRP_SIZE];
 655                 struct dirent de;
 656         } dbuf;
 657
 658         if (smbw_getdents(d->fd, &dbuf.de, DIRP_SIZE) > 0)
 659                 return &dbuf.de;
 660
 661         return NULL;
 662 }
 663
 664 /*****************************************************
 665 close a DIR*
 666 *******************************************************/
 667 int smbw_closedir(DIR *dirp)
 668 {
 669         struct smbw_dir *d = (struct smbw_dir *)dirp;
 670         return smbw_close(d->fd);
 671 }
 672
 673 /*****************************************************
 674 seek in a directory
 675 *******************************************************/
 676 void smbw_seekdir(DIR *dirp, off_t offset)
 677 {
 678         struct smbw_dir *d = (struct smbw_dir *)dirp;
 679         smbw_dir_lseek(d->fd,offset, SEEK_SET);
 680 }
 681
 682 /*****************************************************
 683 current loc in a directory
 684 *******************************************************/
 685 off_t smbw_telldir(DIR *dirp)
 686 {
 687         struct smbw_dir *d = (struct smbw_dir *)dirp;
 688         return smbw_dir_lseek(d->fd,0,SEEK_CUR);
 689 }