source: vendor/3.6.0/source3/modules/vfs_netatalk.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 11.9 KB
Line 
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#include "smbd/smbd.h"
23#include "system/filesys.h"
24
25#undef DBGC_CLASS
26#define DBGC_CLASS DBGC_VFS
27
28#define APPLEDOUBLE ".AppleDouble"
29#define ADOUBLEMODE 0777
30
31/* atalk functions */
32
33static int atalk_build_paths(TALLOC_CTX *ctx, const char *path,
34 const char *fname,
35 char **adbl_path, char **orig_path,
36 SMB_STRUCT_STAT *adbl_info,
37 SMB_STRUCT_STAT *orig_info,
38 bool fake_dir_create_times);
39
40static int atalk_unlink_file(const char *path);
41
42static int atalk_get_path_ptr(char *path)
43{
44 int i = 0;
45 int ptr = 0;
46
47 for (i = 0; path[i]; i ++) {
48 if (path[i] == '/')
49 ptr = i;
50 /* get out some 'spam';) from win32's file name */
51 else if (path[i] == ':') {
52 path[i] = '\0';
53 break;
54 }
55 }
56
57 return ptr;
58}
59
60static int atalk_build_paths(TALLOC_CTX *ctx, const char *path,
61 const char *fname,
62 char **adbl_path, char **orig_path,
63 SMB_STRUCT_STAT *adbl_info,
64 SMB_STRUCT_STAT *orig_info,
65 bool fake_dir_create_times)
66{
67 int ptr0 = 0;
68 int ptr1 = 0;
69 char *dname = 0;
70 char *name = 0;
71
72 if (!ctx || !path || !fname || !adbl_path || !orig_path ||
73 !adbl_info || !orig_info)
74 return -1;
75#if 0
76 DEBUG(3, ("ATALK: PATH: %s[%s]\n", path, fname));
77#endif
78 if (strstr(path, APPLEDOUBLE) || strstr(fname, APPLEDOUBLE)) {
79 DEBUG(3, ("ATALK: path %s[%s] already contains %s\n", path, fname, APPLEDOUBLE));
80 return -1;
81 }
82
83 if (fname[0] == '.') ptr0 ++;
84 if (fname[1] == '/') ptr0 ++;
85
86 *orig_path = talloc_asprintf(ctx, "%s/%s", path, &fname[ptr0]);
87
88 /* get pointer to last '/' */
89 ptr1 = atalk_get_path_ptr(*orig_path);
90
91 sys_lstat(*orig_path, orig_info, fake_dir_create_times);
92
93 if (S_ISDIR(orig_info->st_ex_mode)) {
94 *adbl_path = talloc_asprintf(ctx, "%s/%s/%s/",
95 path, &fname[ptr0], APPLEDOUBLE);
96 } else {
97 dname = talloc_strdup(ctx, *orig_path);
98 dname[ptr1] = '\0';
99 name = *orig_path;
100 *adbl_path = talloc_asprintf(ctx, "%s/%s/%s",
101 dname, APPLEDOUBLE, &name[ptr1 + 1]);
102 }
103#if 0
104 DEBUG(3, ("ATALK: DEBUG:\n%s\n%s\n", *orig_path, *adbl_path));
105#endif
106 sys_lstat(*adbl_path, adbl_info, fake_dir_create_times);
107 return 0;
108}
109
110static int atalk_unlink_file(const char *path)
111{
112 int ret = 0;
113
114 become_root();
115 ret = unlink(path);
116 unbecome_root();
117
118 return ret;
119}
120
121static void atalk_add_to_list(name_compare_entry **list)
122{
123 int i, count = 0;
124 name_compare_entry *new_list = 0;
125 name_compare_entry *cur_list = 0;
126
127 cur_list = *list;
128
129 if (cur_list) {
130 for (i = 0, count = 0; cur_list[i].name; i ++, count ++) {
131 if (strstr(cur_list[i].name, APPLEDOUBLE))
132 return;
133 }
134 }
135
136 if (!(new_list = SMB_CALLOC_ARRAY(name_compare_entry, count + 2)))
137 return;
138
139 for (i = 0; i < count; i ++) {
140 new_list[i].name = SMB_STRDUP(cur_list[i].name);
141 new_list[i].is_wild = cur_list[i].is_wild;
142 }
143
144 new_list[i].name = SMB_STRDUP(APPLEDOUBLE);
145 new_list[i].is_wild = False;
146
147 free_namearray(*list);
148
149 *list = new_list;
150 new_list = 0;
151 cur_list = 0;
152}
153
154static void atalk_rrmdir(TALLOC_CTX *ctx, char *path)
155{
156 char *dpath;
157 SMB_STRUCT_DIRENT *dent = 0;
158 SMB_STRUCT_DIR *dir;
159
160 if (!path) return;
161
162 dir = sys_opendir(path);
163 if (!dir) return;
164
165 while (NULL != (dent = sys_readdir(dir))) {
166 if (strcmp(dent->d_name, ".") == 0 ||
167 strcmp(dent->d_name, "..") == 0)
168 continue;
169 if (!(dpath = talloc_asprintf(ctx, "%s/%s",
170 path, dent->d_name)))
171 continue;
172 atalk_unlink_file(dpath);
173 }
174
175 sys_closedir(dir);
176}
177
178/* Disk operations */
179
180/* Directory operations */
181
182static SMB_STRUCT_DIR *atalk_opendir(struct vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
183{
184 SMB_STRUCT_DIR *ret = 0;
185
186 ret = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
187
188 /*
189 * when we try to perform delete operation upon file which has fork
190 * in ./.AppleDouble and this directory wasn't hidden by Samba,
191 * MS Windows explorer causes the error: "Cannot find the specified file"
192 * There is some workaround to avoid this situation, i.e. if
193 * connection has not .AppleDouble entry in either veto or hide
194 * list then it would be nice to add one.
195 */
196
197 atalk_add_to_list(&handle->conn->hide_list);
198 atalk_add_to_list(&handle->conn->veto_list);
199
200 return ret;
201}
202
203static SMB_STRUCT_DIR *atalk_fdopendir(struct vfs_handle_struct *handle, files_struct *fsp, const char *mask, uint32 attr)
204{
205 SMB_STRUCT_DIR *ret = 0;
206
207 ret = SMB_VFS_NEXT_FDOPENDIR(handle, fsp, mask, attr);
208
209 if (ret == NULL) {
210 return ret;
211 }
212
213 /*
214 * when we try to perform delete operation upon file which has fork
215 * in ./.AppleDouble and this directory wasn't hidden by Samba,
216 * MS Windows explorer causes the error: "Cannot find the specified file"
217 * There is some workaround to avoid this situation, i.e. if
218 * connection has not .AppleDouble entry in either veto or hide
219 * list then it would be nice to add one.
220 */
221
222 atalk_add_to_list(&handle->conn->hide_list);
223 atalk_add_to_list(&handle->conn->veto_list);
224
225 return ret;
226}
227
228static int atalk_rmdir(struct vfs_handle_struct *handle, const char *path)
229{
230 bool add = False;
231 TALLOC_CTX *ctx = 0;
232 char *dpath;
233
234 if (!handle->conn->origpath || !path) goto exit_rmdir;
235
236 /* due to there is no way to change bDeleteVetoFiles variable
237 * from this module, gotta use talloc stuff..
238 */
239
240 strstr(path, APPLEDOUBLE) ? (add = False) : (add = True);
241
242 if (!(ctx = talloc_init("remove_directory")))
243 goto exit_rmdir;
244
245 if (!(dpath = talloc_asprintf(ctx, "%s/%s%s",
246 handle->conn->origpath, path, add ? "/"APPLEDOUBLE : "")))
247 goto exit_rmdir;
248
249 atalk_rrmdir(ctx, dpath);
250
251exit_rmdir:
252 talloc_destroy(ctx);
253 return SMB_VFS_NEXT_RMDIR(handle, path);
254}
255
256/* File operations */
257
258static int atalk_rename(struct vfs_handle_struct *handle,
259 const struct smb_filename *smb_fname_src,
260 const struct smb_filename *smb_fname_dst)
261{
262 int ret = 0;
263 char *oldname = NULL;
264 char *adbl_path = NULL;
265 char *orig_path = NULL;
266 SMB_STRUCT_STAT adbl_info;
267 SMB_STRUCT_STAT orig_info;
268 NTSTATUS status;
269
270 ret = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
271
272 status = get_full_smb_filename(talloc_tos(), smb_fname_src, &oldname);
273 if (!NT_STATUS_IS_OK(status)) {
274 return ret;
275 }
276
277 if (atalk_build_paths(talloc_tos(), handle->conn->origpath, oldname,
278 &adbl_path, &orig_path, &adbl_info,
279 &orig_info, false) != 0)
280 goto exit_rename;
281
282 if (S_ISDIR(orig_info.st_ex_mode) || S_ISREG(orig_info.st_ex_mode)) {
283 DEBUG(3, ("ATALK: %s has passed..\n", adbl_path));
284 goto exit_rename;
285 }
286
287 atalk_unlink_file(adbl_path);
288
289exit_rename:
290 TALLOC_FREE(oldname);
291 TALLOC_FREE(adbl_path);
292 TALLOC_FREE(orig_path);
293 return ret;
294}
295
296static int atalk_unlink(struct vfs_handle_struct *handle,
297 const struct smb_filename *smb_fname)
298{
299 int ret = 0, i;
300 char *path = NULL;
301 char *adbl_path = NULL;
302 char *orig_path = NULL;
303 SMB_STRUCT_STAT adbl_info;
304 SMB_STRUCT_STAT orig_info;
305 NTSTATUS status;
306
307 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
308
309 status = get_full_smb_filename(talloc_tos(), smb_fname, &path);
310 if (!NT_STATUS_IS_OK(status)) {
311 return ret;
312 }
313
314 /* no .AppleDouble sync if veto or hide list is empty,
315 * otherwise "Cannot find the specified file" error will be caused
316 */
317
318 if (!handle->conn->veto_list) return ret;
319 if (!handle->conn->hide_list) return ret;
320
321 for (i = 0; handle->conn->veto_list[i].name; i ++) {
322 if (strstr(handle->conn->veto_list[i].name, APPLEDOUBLE))
323 break;
324 }
325
326 if (!handle->conn->veto_list[i].name) {
327 for (i = 0; handle->conn->hide_list[i].name; i ++) {
328 if (strstr(handle->conn->hide_list[i].name, APPLEDOUBLE))
329 break;
330 else {
331 DEBUG(3, ("ATALK: %s is not hidden, skipped..\n",
332 APPLEDOUBLE));
333 goto exit_unlink;
334 }
335 }
336 }
337
338 if (atalk_build_paths(talloc_tos(), handle->conn->origpath, path,
339 &adbl_path, &orig_path,
340 &adbl_info, &orig_info, false) != 0)
341 goto exit_unlink;
342
343 if (S_ISDIR(orig_info.st_ex_mode) || S_ISREG(orig_info.st_ex_mode)) {
344 DEBUG(3, ("ATALK: %s has passed..\n", adbl_path));
345 goto exit_unlink;
346 }
347
348 atalk_unlink_file(adbl_path);
349
350exit_unlink:
351 TALLOC_FREE(path);
352 TALLOC_FREE(adbl_path);
353 TALLOC_FREE(orig_path);
354 return ret;
355}
356
357static int atalk_chmod(struct vfs_handle_struct *handle, const char *path, mode_t mode)
358{
359 int ret = 0;
360 char *adbl_path = 0;
361 char *orig_path = 0;
362 SMB_STRUCT_STAT adbl_info;
363 SMB_STRUCT_STAT orig_info;
364 TALLOC_CTX *ctx;
365
366 ret = SMB_VFS_NEXT_CHMOD(handle, path, mode);
367
368 if (!path) return ret;
369
370 if (!(ctx = talloc_init("chmod_file")))
371 return ret;
372
373 if (atalk_build_paths(ctx, handle->conn->origpath, path, &adbl_path,
374 &orig_path, &adbl_info, &orig_info,
375 false) != 0)
376 goto exit_chmod;
377
378 if (!S_ISDIR(orig_info.st_ex_mode) && !S_ISREG(orig_info.st_ex_mode)) {
379 DEBUG(3, ("ATALK: %s has passed..\n", orig_path));
380 goto exit_chmod;
381 }
382
383 chmod(adbl_path, ADOUBLEMODE);
384
385exit_chmod:
386 talloc_destroy(ctx);
387 return ret;
388}
389
390static int atalk_chown(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("chown_file")))
404 return ret;
405
406 if (atalk_build_paths(ctx, handle->conn->origpath, path,
407 &adbl_path, &orig_path,
408 &adbl_info, &orig_info, false) != 0)
409 goto exit_chown;
410
411 if (!S_ISDIR(orig_info.st_ex_mode) && !S_ISREG(orig_info.st_ex_mode)) {
412 DEBUG(3, ("ATALK: %s has passed..\n", orig_path));
413 goto exit_chown;
414 }
415
416 if (chown(adbl_path, uid, gid) == -1) {
417 DEBUG(3, ("ATALK: chown error %s\n", strerror(errno)));
418 }
419
420exit_chown:
421 talloc_destroy(ctx);
422 return ret;
423}
424
425static int atalk_lchown(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
426{
427 int ret = 0;
428 char *adbl_path = 0;
429 char *orig_path = 0;
430 SMB_STRUCT_STAT adbl_info;
431 SMB_STRUCT_STAT orig_info;
432 TALLOC_CTX *ctx;
433
434 ret = SMB_VFS_NEXT_CHOWN(handle, path, uid, gid);
435
436 if (!path) return ret;
437
438 if (!(ctx = talloc_init("lchown_file")))
439 return ret;
440
441 if (atalk_build_paths(ctx, handle->conn->origpath, path,
442 &adbl_path, &orig_path,
443 &adbl_info, &orig_info, false) != 0)
444 goto exit_lchown;
445
446 if (!S_ISDIR(orig_info.st_ex_mode) && !S_ISREG(orig_info.st_ex_mode)) {
447 DEBUG(3, ("ATALK: %s has passed..\n", orig_path));
448 goto exit_lchown;
449 }
450
451 if (lchown(adbl_path, uid, gid) == -1) {
452 DEBUG(3, ("ATALK: lchown error %s\n", strerror(errno)));
453 }
454
455exit_lchown:
456 talloc_destroy(ctx);
457 return ret;
458}
459
460static struct vfs_fn_pointers vfs_netatalk_fns = {
461 .opendir = atalk_opendir,
462 .fdopendir = atalk_fdopendir,
463 .rmdir = atalk_rmdir,
464 .rename = atalk_rename,
465 .unlink = atalk_unlink,
466 .chmod = atalk_chmod,
467 .chown = atalk_chown,
468 .lchown = atalk_lchown,
469};
470
471NTSTATUS vfs_netatalk_init(void);
472NTSTATUS vfs_netatalk_init(void)
473{
474 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "netatalk",
475 &vfs_netatalk_fns);
476}
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