source: branches/samba-3.0/source/modules/vfs_netatalk.c

Last change on this file was 22, checked in by Yuri Dario, 18 years ago

Source code upgrade to 3.0.25pre2.
File size: 10.1 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 2 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, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include "includes.h"
23
24#undef DBGC_CLASS
25#define DBGC_CLASS DBGC_VFS
26
27#define APPLEDOUBLE ".AppleDouble"
28#define ADOUBLEMODE 0777
29
30/* atalk functions */
31
32static int atalk_build_paths(TALLOC_CTX *ctx, const char *path,
33 const char *fname, char **adbl_path, char **orig_path,
34 SMB_STRUCT_STAT *adbl_info, SMB_STRUCT_STAT *orig_info);
35
36static int atalk_unlink_file(const char *path);
37
38static int atalk_get_path_ptr(char *path)
39{
40 int i = 0;
41 int ptr = 0;
42
43 for (i = 0; path[i]; i ++) {
44 if (path[i] == '/')
45 ptr = i;
46 /* get out some 'spam';) from win32's file name */
47 else if (path[i] == ':') {
48 path[i] = '\0';
49 break;
50 }
51 }
52
53 return ptr;
54}
55
56static int atalk_build_paths(TALLOC_CTX *ctx, const char *path, const char *fname,
57 char **adbl_path, char **orig_path,
58 SMB_STRUCT_STAT *adbl_info, SMB_STRUCT_STAT *orig_info)
59{
60 int ptr0 = 0;
61 int ptr1 = 0;
62 char *dname = 0;
63 char *name = 0;
64
65 if (!ctx || !path || !fname || !adbl_path || !orig_path ||
66 !adbl_info || !orig_info)
67 return -1;
68#if 0
69 DEBUG(3, ("ATALK: PATH: %s[%s]\n", path, fname));
70#endif
71 if (strstr(path, APPLEDOUBLE) || strstr(fname, APPLEDOUBLE)) {
72 DEBUG(3, ("ATALK: path %s[%s] already contains %s\n", path, fname, APPLEDOUBLE));
73 return -1;
74 }
75
76 if (fname[0] == '.') ptr0 ++;
77 if (fname[1] == '/') ptr0 ++;
78
79 *orig_path = talloc_asprintf(ctx, "%s/%s", path, &fname[ptr0]);
80
81 /* get pointer to last '/' */
82 ptr1 = atalk_get_path_ptr(*orig_path);
83
84 sys_lstat(*orig_path, orig_info);
85
86 if (S_ISDIR(orig_info->st_mode)) {
87 *adbl_path = talloc_asprintf(ctx, "%s/%s/%s/",
88 path, &fname[ptr0], APPLEDOUBLE);
89 } else {
90 dname = talloc_strdup(ctx, *orig_path);
91 dname[ptr1] = '\0';
92 name = *orig_path;
93 *adbl_path = talloc_asprintf(ctx, "%s/%s/%s",
94 dname, APPLEDOUBLE, &name[ptr1 + 1]);
95 }
96#if 0
97 DEBUG(3, ("ATALK: DEBUG:\n%s\n%s\n", *orig_path, *adbl_path));
98#endif
99 sys_lstat(*adbl_path, adbl_info);
100 return 0;
101}
102
103static int atalk_unlink_file(const char *path)
104{
105 int ret = 0;
106
107 become_root();
108 ret = unlink(path);
109 unbecome_root();
110
111 return ret;
112}
113
114static void atalk_add_to_list(name_compare_entry **list)
115{
116 int i, count = 0;
117 name_compare_entry *new_list = 0;
118 name_compare_entry *cur_list = 0;
119
120 cur_list = *list;
121
122 if (cur_list) {
123 for (i = 0, count = 0; cur_list[i].name; i ++, count ++) {
124 if (strstr(cur_list[i].name, APPLEDOUBLE))
125 return;
126 }
127 }
128
129 if (!(new_list = SMB_CALLOC_ARRAY(name_compare_entry, (count == 0 ? 1 : count + 1))))
130 return;
131
132 for (i = 0; i < count; i ++) {
133 new_list[i].name = SMB_STRDUP(cur_list[i].name);
134 new_list[i].is_wild = cur_list[i].is_wild;
135 }
136
137 new_list[i].name = SMB_STRDUP(APPLEDOUBLE);
138 new_list[i].is_wild = False;
139
140 free_namearray(*list);
141
142 *list = new_list;
143 new_list = 0;
144 cur_list = 0;
145}
146
147static void atalk_rrmdir(TALLOC_CTX *ctx, char *path)
148{
149 char *dpath;
150 SMB_STRUCT_DIRENT *dent = 0;
151 SMB_STRUCT_DIR *dir;
152
153 if (!path) return;
154
155 dir = sys_opendir(path);
156 if (!dir) return;
157
158 while (NULL != (dent = sys_readdir(dir))) {
159 if (strcmp(dent->d_name, ".") == 0 ||
160 strcmp(dent->d_name, "..") == 0)
161 continue;
162 if (!(dpath = talloc_asprintf(ctx, "%s/%s",
163 path, dent->d_name)))
164 continue;
165 atalk_unlink_file(dpath);
166 }
167
168 sys_closedir(dir);
169}
170
171/* Disk operations */
172
173/* Directory operations */
174
175static SMB_STRUCT_DIR *atalk_opendir(struct vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
176{
177 SMB_STRUCT_DIR *ret = 0;
178
179 ret = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
180
181 /*
182 * when we try to perform delete operation upon file which has fork
183 * in ./.AppleDouble and this directory wasn't hidden by Samba,
184 * MS Windows explorer causes the error: "Cannot find the specified file"
185 * There is some workaround to avoid this situation, i.e. if
186 * connection has not .AppleDouble entry in either veto or hide
187 * list then it would be nice to add one.
188 */
189
190 atalk_add_to_list(&handle->conn->hide_list);
191 atalk_add_to_list(&handle->conn->veto_list);
192
193 return ret;
194}
195
196static int atalk_rmdir(struct vfs_handle_struct *handle, const char *path)
197{
198 BOOL add = False;
199 TALLOC_CTX *ctx = 0;
200 char *dpath;
201
202 if (!handle->conn->origpath || !path) goto exit_rmdir;
203
204 /* due to there is no way to change bDeleteVetoFiles variable
205 * from this module, gotta use talloc stuff..
206 */
207
208 strstr(path, APPLEDOUBLE) ? (add = False) : (add = True);
209
210 if (!(ctx = talloc_init("remove_directory")))
211 goto exit_rmdir;
212
213 if (!(dpath = talloc_asprintf(ctx, "%s/%s%s",
214 handle->conn->origpath, path, add ? "/"APPLEDOUBLE : "")))
215 goto exit_rmdir;
216
217 atalk_rrmdir(ctx, dpath);
218
219exit_rmdir:
220 talloc_destroy(ctx);
221 return SMB_VFS_NEXT_RMDIR(handle, path);
222}
223
224/* File operations */
225
226static int atalk_rename(struct vfs_handle_struct *handle, const char *oldname, const char *newname)
227{
228 int ret = 0;
229 char *adbl_path = 0;
230 char *orig_path = 0;
231 SMB_STRUCT_STAT adbl_info;
232 SMB_STRUCT_STAT orig_info;
233 TALLOC_CTX *ctx;
234
235 ret = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
236
237 if (!oldname) return ret;
238
239 if (!(ctx = talloc_init("rename_file")))
240 return ret;
241
242 if (atalk_build_paths(ctx, handle->conn->origpath, oldname, &adbl_path, &orig_path,
243 &adbl_info, &orig_info) != 0)
244 goto exit_rename;
245
246 if (S_ISDIR(orig_info.st_mode) || S_ISREG(orig_info.st_mode)) {
247 DEBUG(3, ("ATALK: %s has passed..\n", adbl_path));
248 goto exit_rename;
249 }
250
251 atalk_unlink_file(adbl_path);
252
253exit_rename:
254 talloc_destroy(ctx);
255 return ret;
256}
257
258static int atalk_unlink(struct vfs_handle_struct *handle, const char *path)
259{
260 int ret = 0, i;
261 char *adbl_path = 0;
262 char *orig_path = 0;
263 SMB_STRUCT_STAT adbl_info;
264 SMB_STRUCT_STAT orig_info;
265 TALLOC_CTX *ctx;
266
267 ret = SMB_VFS_NEXT_UNLINK(handle, path);
268
269 if (!path) return ret;
270
271 /* no .AppleDouble sync if veto or hide list is empty,
272 * otherwise "Cannot find the specified file" error will be caused
273 */
274
275 if (!handle->conn->veto_list) return ret;
276 if (!handle->conn->hide_list) return ret;
277
278 for (i = 0; handle->conn->veto_list[i].name; i ++) {
279 if (strstr(handle->conn->veto_list[i].name, APPLEDOUBLE))
280 break;
281 }
282
283 if (!handle->conn->veto_list[i].name) {
284 for (i = 0; handle->conn->hide_list[i].name; i ++) {
285 if (strstr(handle->conn->hide_list[i].name, APPLEDOUBLE))
286 break;
287 else {
288 DEBUG(3, ("ATALK: %s is not hidden, skipped..\n",
289 APPLEDOUBLE));
290 return ret;
291 }
292 }
293 }
294
295 if (!(ctx = talloc_init("unlink_file")))
296 return ret;
297
298 if (atalk_build_paths(ctx, handle->conn->origpath, path, &adbl_path, &orig_path,
299 &adbl_info, &orig_info) != 0)
300 goto exit_unlink;
301
302 if (S_ISDIR(orig_info.st_mode) || S_ISREG(orig_info.st_mode)) {
303 DEBUG(3, ("ATALK: %s has passed..\n", adbl_path));
304 goto exit_unlink;
305 }
306
307 atalk_unlink_file(adbl_path);
308
309exit_unlink:
310 talloc_destroy(ctx);
311 return ret;
312}
313
314static int atalk_chmod(struct vfs_handle_struct *handle, const char *path, mode_t mode)
315{
316 int ret = 0;
317 char *adbl_path = 0;
318 char *orig_path = 0;
319 SMB_STRUCT_STAT adbl_info;
320 SMB_STRUCT_STAT orig_info;
321 TALLOC_CTX *ctx;
322
323 ret = SMB_VFS_NEXT_CHMOD(handle, path, mode);
324
325 if (!path) return ret;
326
327 if (!(ctx = talloc_init("chmod_file")))
328 return ret;
329
330 if (atalk_build_paths(ctx, handle->conn->origpath, path, &adbl_path, &orig_path,
331 &adbl_info, &orig_info) != 0)
332 goto exit_chmod;
333
334 if (!S_ISDIR(orig_info.st_mode) && !S_ISREG(orig_info.st_mode)) {
335 DEBUG(3, ("ATALK: %s has passed..\n", orig_path));
336 goto exit_chmod;
337 }
338
339 chmod(adbl_path, ADOUBLEMODE);
340
341exit_chmod:
342 talloc_destroy(ctx);
343 return ret;
344}
345
346static int atalk_chown(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
347{
348 int ret = 0;
349 char *adbl_path = 0;
350 char *orig_path = 0;
351 SMB_STRUCT_STAT adbl_info;
352 SMB_STRUCT_STAT orig_info;
353 TALLOC_CTX *ctx;
354
355 ret = SMB_VFS_NEXT_CHOWN(handle, path, uid, gid);
356
357 if (!path) return ret;
358
359 if (!(ctx = talloc_init("chown_file")))
360 return ret;
361
362 if (atalk_build_paths(ctx, handle->conn->origpath, path, &adbl_path, &orig_path,
363 &adbl_info, &orig_info) != 0)
364 goto exit_chown;
365
366 if (!S_ISDIR(orig_info.st_mode) && !S_ISREG(orig_info.st_mode)) {
367 DEBUG(3, ("ATALK: %s has passed..\n", orig_path));
368 goto exit_chown;
369 }
370
371 chown(adbl_path, uid, gid);
372
373exit_chown:
374 talloc_destroy(ctx);
375 return ret;
376}
377
378static vfs_op_tuple atalk_ops[] = {
379
380 /* Directory operations */
381
382 {SMB_VFS_OP(atalk_opendir), SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_TRANSPARENT},
383 {SMB_VFS_OP(atalk_rmdir), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT},
384
385 /* File operations */
386
387 {SMB_VFS_OP(atalk_rename), SMB_VFS_OP_RENAME, SMB_VFS_LAYER_TRANSPARENT},
388 {SMB_VFS_OP(atalk_unlink), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
389 {SMB_VFS_OP(atalk_chmod), SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_TRANSPARENT},
390 {SMB_VFS_OP(atalk_chown), SMB_VFS_OP_CHOWN, SMB_VFS_LAYER_TRANSPARENT},
391
392 /* Finish VFS operations definition */
393
394 {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
395};
396
397NTSTATUS vfs_netatalk_init(void);
398NTSTATUS vfs_netatalk_init(void)
399{
400 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "netatalk", atalk_ops);
401}
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