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