source3/modules/vfs_netatalk.c

   1 /*
   2  * AppleTalk VFS module for Samba-3.x
   3  *
   4  * Copyright (C) Alexei Kotovich, 2002
   5  * Copyright (C) Stefan (metze) Metzmacher, 2003
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "includes.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_VFS
  25
  26 #define APPLEDOUBLE     ".AppleDouble"
  27 #define ADOUBLEMODE     0777
  28
  29 /* atalk functions */
  30
  31 static int atalk_build_paths(TALLOC_CTX *ctx, const char *path,
  32                              const char *fname,
  33                              char **adbl_path, char **orig_path,
  34                              SMB_STRUCT_STAT *adbl_info,
  35                              SMB_STRUCT_STAT *orig_info,
  36                              bool fake_dir_create_times);
  37
  38 static int atalk_unlink_file(const char *path);
  39
  40 static int atalk_get_path_ptr(char *path)
  41 {
  42         int i   = 0;
  43         int ptr = 0;
  44
  45         for (i = 0; path[i]; i ++) {
  46                 if (path[i] == '/')
  47                         ptr = i;
  48                 /* get out some 'spam';) from win32's file name */
  49                 else if (path[i] == ':') {
  50                         path[i] = '\0';
  51                         break;
  52                 }
  53         }
  54
  55         return ptr;
  56 }
  57
  58 static int atalk_build_paths(TALLOC_CTX *ctx, const char *path,
  59                              const char *fname,
  60                              char **adbl_path, char **orig_path,
  61                              SMB_STRUCT_STAT *adbl_info,
  62                              SMB_STRUCT_STAT *orig_info,
  63                              bool fake_dir_create_times)
  64 {
  65         int ptr0 = 0;
  66         int ptr1 = 0;
  67         char *dname = 0;
  68         char *name  = 0;
  69
  70         if (!ctx || !path || !fname || !adbl_path || !orig_path ||
  71                 !adbl_info || !orig_info)
  72                 return -1;
  73 #if 0
  74         DEBUG(3, ("ATALK: PATH: %s[%s]\n", path, fname));
  75 #endif
  76         if (strstr(path, APPLEDOUBLE) || strstr(fname, APPLEDOUBLE)) {
  77                 DEBUG(3, ("ATALK: path %s[%s] already contains %s\n", path, fname, APPLEDOUBLE));
  78                 return -1;
  79         }
  80
  81         if (fname[0] == '.') ptr0 ++;
  82         if (fname[1] == '/') ptr0 ++;
  83
  84         *orig_path = talloc_asprintf(ctx, "%s/%s", path, &fname[ptr0]);
  85
  86         /* get pointer to last '/' */
  87         ptr1 = atalk_get_path_ptr(*orig_path);
  88
  89         sys_lstat(*orig_path, orig_info, fake_dir_create_times);
  90
  91         if (S_ISDIR(orig_info->st_ex_mode)) {
  92                 *adbl_path = talloc_asprintf(ctx, "%s/%s/%s/",
  93                   path, &fname[ptr0], APPLEDOUBLE);
  94         } else {
  95                 dname = talloc_strdup(ctx, *orig_path);
  96                 dname[ptr1] = '\0';
  97                 name = *orig_path;
  98                 *adbl_path = talloc_asprintf(ctx, "%s/%s/%s",
  99                   dname, APPLEDOUBLE, &name[ptr1 + 1]);
 100         }
 101 #if 0
 102         DEBUG(3, ("ATALK: DEBUG:\n%s\n%s\n", *orig_path, *adbl_path));
 103 #endif
 104         sys_lstat(*adbl_path, adbl_info, fake_dir_create_times);
 105         return 0;
 106 }
 107
 108 static int atalk_unlink_file(const char *path)
 109 {
 110         int ret = 0;
 111
 112         become_root();
 113         ret = unlink(path);
 114         unbecome_root();
 115
 116         return ret;
 117 }
 118
 119 static void atalk_add_to_list(name_compare_entry **list)
 120 {
 121         int i, count = 0;
 122         name_compare_entry *new_list = 0;
 123         name_compare_entry *cur_list = 0;
 124
 125         cur_list = *list;
 126
 127         if (cur_list) {
 128                 for (i = 0, count = 0; cur_list[i].name; i ++, count ++) {
 129                         if (strstr(cur_list[i].name, APPLEDOUBLE))
 130                                 return;
 131                 }
 132         }
 133
 134         if (!(new_list = SMB_CALLOC_ARRAY(name_compare_entry, (count == 0 ? 1 : count + 1))))
 135                 return;
 136
 137         for (i = 0; i < count; i ++) {
 138                 new_list[i].name    = SMB_STRDUP(cur_list[i].name);
 139                 new_list[i].is_wild = cur_list[i].is_wild;
 140         }
 141
 142         new_list[i].name    = SMB_STRDUP(APPLEDOUBLE);
 143         new_list[i].is_wild = False;
 144
 145         free_namearray(*list);
 146
 147         *list = new_list;
 148         new_list = 0;
 149         cur_list = 0;
 150 }
 151
 152 static void atalk_rrmdir(TALLOC_CTX *ctx, char *path)
 153 {
 154         char *dpath;
 155         SMB_STRUCT_DIRENT *dent = 0;
 156         SMB_STRUCT_DIR *dir;
 157
 158         if (!path) return;
 159
 160         dir = sys_opendir(path);
 161         if (!dir) return;
 162
 163         while (NULL != (dent = sys_readdir(dir))) {
 164                 if (strcmp(dent->d_name, ".") == 0 ||
 165                     strcmp(dent->d_name, "..") == 0)
 166                         continue;
 167                 if (!(dpath = talloc_asprintf(ctx, "%s/%s",
 168                                               path, dent->d_name)))
 169                         continue;
 170                 atalk_unlink_file(dpath);
 171         }
 172
 173         sys_closedir(dir);
 174 }
 175
 176 /* Disk operations */
 177
 178 /* Directory operations */
 179
 180 static SMB_STRUCT_DIR *atalk_opendir(struct vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 181 {
 182         SMB_STRUCT_DIR *ret = 0;
 183
 184         ret = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 185
 186         /*
 187          * when we try to perform delete operation upon file which has fork
 188          * in ./.AppleDouble and this directory wasn't hidden by Samba,
 189          * MS Windows explorer causes the error: "Cannot find the specified file"
 190          * There is some workaround to avoid this situation, i.e. if
 191          * connection has not .AppleDouble entry in either veto or hide
 192          * list then it would be nice to add one.
 193          */
 194
 195         atalk_add_to_list(&handle->conn->hide_list);
 196         atalk_add_to_list(&handle->conn->veto_list);
 197
 198         return ret;
 199 }
 200
 201 static int atalk_rmdir(struct vfs_handle_struct *handle, const char *path)
 202 {
 203         bool add = False;
 204         TALLOC_CTX *ctx = 0;
 205         char *dpath;
 206
 207         if (!handle->conn->origpath || !path) goto exit_rmdir;
 208
 209         /* due to there is no way to change bDeleteVetoFiles variable
 210          * from this module, gotta use talloc stuff..
 211          */
 212
 213         strstr(path, APPLEDOUBLE) ? (add = False) : (add = True);
 214
 215         if (!(ctx = talloc_init("remove_directory")))
 216                 goto exit_rmdir;
 217
 218         if (!(dpath = talloc_asprintf(ctx, "%s/%s%s",
 219           handle->conn->origpath, path, add ? "/"APPLEDOUBLE : "")))
 220                 goto exit_rmdir;
 221
 222         atalk_rrmdir(ctx, dpath);
 223
 224 exit_rmdir:
 225         talloc_destroy(ctx);
 226         return SMB_VFS_NEXT_RMDIR(handle, path);
 227 }
 228
 229 /* File operations */
 230
 231 static int atalk_rename(struct vfs_handle_struct *handle,
 232                         const struct smb_filename *smb_fname_src,
 233                         const struct smb_filename *smb_fname_dst)
 234 {
 235         int ret = 0;
 236         char *oldname = NULL;
 237         char *adbl_path = NULL;
 238         char *orig_path = NULL;
 239         SMB_STRUCT_STAT adbl_info;
 240         SMB_STRUCT_STAT orig_info;
 241         NTSTATUS status;
 242
 243         ret = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 244
 245         status = get_full_smb_filename(talloc_tos(), smb_fname_src, &oldname);
 246         if (!NT_STATUS_IS_OK(status)) {
 247                 return ret;
 248         }
 249
 250         if (atalk_build_paths(talloc_tos(), handle->conn->origpath, oldname,
 251                               &adbl_path, &orig_path, &adbl_info,
 252                               &orig_info, false) != 0)
 253                 goto exit_rename;
 254
 255         if (S_ISDIR(orig_info.st_ex_mode) || S_ISREG(orig_info.st_ex_mode)) {
 256                 DEBUG(3, ("ATALK: %s has passed..\n", adbl_path));
 257                 goto exit_rename;
 258         }
 259
 260         atalk_unlink_file(adbl_path);
 261
 262 exit_rename:
 263         TALLOC_FREE(oldname);
 264         TALLOC_FREE(adbl_path);
 265         TALLOC_FREE(orig_path);
 266         return ret;
 267 }
 268
 269 static int atalk_unlink(struct vfs_handle_struct *handle,
 270                         const struct smb_filename *smb_fname)
 271 {
 272         int ret = 0, i;
 273         char *path = NULL;
 274         char *adbl_path = NULL;
 275         char *orig_path = NULL;
 276         SMB_STRUCT_STAT adbl_info;
 277         SMB_STRUCT_STAT orig_info;
 278         NTSTATUS status;
 279
 280         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 281
 282         status = get_full_smb_filename(talloc_tos(), smb_fname, &path);
 283         if (!NT_STATUS_IS_OK(status)) {
 284                 return ret;
 285         }
 286
 287         /* no .AppleDouble sync if veto or hide list is empty,
 288          * otherwise "Cannot find the specified file" error will be caused
 289          */
 290
 291         if (!handle->conn->veto_list) return ret;
 292         if (!handle->conn->hide_list) return ret;
 293
 294         for (i = 0; handle->conn->veto_list[i].name; i ++) {
 295                 if (strstr(handle->conn->veto_list[i].name, APPLEDOUBLE))
 296                         break;
 297         }
 298
 299         if (!handle->conn->veto_list[i].name) {
 300                 for (i = 0; handle->conn->hide_list[i].name; i ++) {
 301                         if (strstr(handle->conn->hide_list[i].name, APPLEDOUBLE))
 302                                 break;
 303                         else {
 304                                 DEBUG(3, ("ATALK: %s is not hidden, skipped..\n",
 305                                   APPLEDOUBLE));
 306                                 goto exit_unlink;
 307                         }
 308                 }
 309         }
 310
 311         if (atalk_build_paths(talloc_tos(), handle->conn->origpath, path,
 312                               &adbl_path, &orig_path,
 313                               &adbl_info, &orig_info, false) != 0)
 314                 goto exit_unlink;
 315
 316         if (S_ISDIR(orig_info.st_ex_mode) || S_ISREG(orig_info.st_ex_mode)) {
 317                 DEBUG(3, ("ATALK: %s has passed..\n", adbl_path));
 318                 goto exit_unlink;
 319         }
 320
 321         atalk_unlink_file(adbl_path);
 322
 323 exit_unlink:
 324         TALLOC_FREE(path);
 325         TALLOC_FREE(adbl_path);
 326         TALLOC_FREE(orig_path);
 327         return ret;
 328 }
 329
 330 static int atalk_chmod(struct vfs_handle_struct *handle, const char *path, mode_t mode)
 331 {
 332         int ret = 0;
 333         char *adbl_path = 0;
 334         char *orig_path = 0;
 335         SMB_STRUCT_STAT adbl_info;
 336         SMB_STRUCT_STAT orig_info;
 337         TALLOC_CTX *ctx;
 338
 339         ret = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 340
 341         if (!path) return ret;
 342
 343         if (!(ctx = talloc_init("chmod_file")))
 344                 return ret;
 345
 346         if (atalk_build_paths(ctx, handle->conn->origpath, path, &adbl_path,
 347                               &orig_path, &adbl_info, &orig_info,
 348                               false) != 0)
 349                 goto exit_chmod;
 350
 351         if (!S_ISDIR(orig_info.st_ex_mode) && !S_ISREG(orig_info.st_ex_mode)) {
 352                 DEBUG(3, ("ATALK: %s has passed..\n", orig_path));
 353                 goto exit_chmod;
 354         }
 355
 356         chmod(adbl_path, ADOUBLEMODE);
 357
 358 exit_chmod:
 359         talloc_destroy(ctx);
 360         return ret;
 361 }
 362
 363 static int atalk_chown(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 364 {
 365         int ret = 0;
 366         char *adbl_path = 0;
 367         char *orig_path = 0;
 368         SMB_STRUCT_STAT adbl_info;
 369         SMB_STRUCT_STAT orig_info;
 370         TALLOC_CTX *ctx;
 371
 372         ret = SMB_VFS_NEXT_CHOWN(handle, path, uid, gid);
 373
 374         if (!path) return ret;
 375
 376         if (!(ctx = talloc_init("chown_file")))
 377                 return ret;
 378
 379         if (atalk_build_paths(ctx, handle->conn->origpath, path,
 380                               &adbl_path, &orig_path,
 381                               &adbl_info, &orig_info, false) != 0)
 382                 goto exit_chown;
 383
 384         if (!S_ISDIR(orig_info.st_ex_mode) && !S_ISREG(orig_info.st_ex_mode)) {
 385                 DEBUG(3, ("ATALK: %s has passed..\n", orig_path));
 386                 goto exit_chown;
 387         }
 388
 389         if (chown(adbl_path, uid, gid) == -1) {
 390                 DEBUG(3, ("ATALK: chown error %s\n", strerror(errno)));
 391         }
 392
 393 exit_chown:
 394         talloc_destroy(ctx);
 395         return ret;
 396 }
 397
 398 static int atalk_lchown(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 399 {
 400         int ret = 0;
 401         char *adbl_path = 0;
 402         char *orig_path = 0;
 403         SMB_STRUCT_STAT adbl_info;
 404         SMB_STRUCT_STAT orig_info;
 405         TALLOC_CTX *ctx;
 406
 407         ret = SMB_VFS_NEXT_CHOWN(handle, path, uid, gid);
 408
 409         if (!path) return ret;
 410
 411         if (!(ctx = talloc_init("lchown_file")))
 412                 return ret;
 413
 414         if (atalk_build_paths(ctx, handle->conn->origpath, path,
 415                               &adbl_path, &orig_path,
 416                               &adbl_info, &orig_info, false) != 0)
 417                 goto exit_lchown;
 418
 419         if (!S_ISDIR(orig_info.st_ex_mode) && !S_ISREG(orig_info.st_ex_mode)) {
 420                 DEBUG(3, ("ATALK: %s has passed..\n", orig_path));
 421                 goto exit_lchown;
 422         }
 423
 424         if (lchown(adbl_path, uid, gid) == -1) {
 425                 DEBUG(3, ("ATALK: lchown error %s\n", strerror(errno)));
 426         }
 427
 428 exit_lchown:
 429         talloc_destroy(ctx);
 430         return ret;
 431 }
 432
 433 static struct vfs_fn_pointers vfs_netatalk_fns = {
 434         .opendir = atalk_opendir,
 435         .rmdir = atalk_rmdir,
 436         .rename = atalk_rename,
 437         .unlink = atalk_unlink,
 438         .chmod = atalk_chmod,
 439         .chown = atalk_chown,
 440         .lchown = atalk_lchown,
 441 };
 442
 443 NTSTATUS vfs_netatalk_init(void);
 444 NTSTATUS vfs_netatalk_init(void)
 445 {
 446         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "netatalk",
 447                                 &vfs_netatalk_fns);
 448 }