?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
smbcacls: Use defines for security flags
[Samba.git] / source3 / modules / vfs_recycle.c
blob00d7f34f2f72cbecd16bcb6057120f42dbd502ce
1 /*
2 * Recycle bin VFS module for Samba.
3 *
4 * Copyright (C) 2001, Brandon Stone, Amherst College, <bbstone@amherst.edu>.
5 * Copyright (C) 2002, Jeremy Allison - modified to make a VFS module.
6 * Copyright (C) 2002, Alexander Bokovoy - cascaded VFS adoption,
7 * Copyright (C) 2002, Juergen Hasch - added some options.
8 * Copyright (C) 2002, Simo Sorce
9 * Copyright (C) 2002, Stefan (metze) Metzmacher
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "smbd/smbd.h"
27 #include "system/filesys.h"
28 #include "../librpc/gen_ndr/ndr_netlogon.h"
29 #include "auth.h"
30
31 #define ALLOC_CHECK(ptr, label) do { if ((ptr) == NULL) { DEBUG(0, ("recycle.bin: out of memory!\n")); errno = ENOMEM; goto label; } } while(0)
32
33 static int vfs_recycle_debug_level = DBGC_VFS;
34
35 #undef DBGC_CLASS
36 #define DBGC_CLASS vfs_recycle_debug_level
37
38 static int recycle_unlink(vfs_handle_struct *handle,
39 const struct smb_filename *smb_fname);
40
41 static const char *recycle_repository(vfs_handle_struct *handle)
42 {
43 const char *tmp_str = NULL;
44
45 tmp_str = lp_parm_const_string(SNUM(handle->conn), "recycle", "repository",".recycle");
46
47 DEBUG(10, ("recycle: repository = %s\n", tmp_str));
48
49 return tmp_str;
50 }
51
52 static bool recycle_keep_dir_tree(vfs_handle_struct *handle)
53 {
54 bool ret;
55
56 ret = lp_parm_bool(SNUM(handle->conn), "recycle", "keeptree", False);
57
58 DEBUG(10, ("recycle_bin: keeptree = %s\n", ret?"True":"False"));
59
60 return ret;
61 }
62
63 static bool recycle_versions(vfs_handle_struct *handle)
64 {
65 bool ret;
66
67 ret = lp_parm_bool(SNUM(handle->conn), "recycle", "versions", False);
68
69 DEBUG(10, ("recycle: versions = %s\n", ret?"True":"False"));
70
71 return ret;
72 }
73
74 static bool recycle_touch(vfs_handle_struct *handle)
75 {
76 bool ret;
77
78 ret = lp_parm_bool(SNUM(handle->conn), "recycle", "touch", False);
79
80 DEBUG(10, ("recycle: touch = %s\n", ret?"True":"False"));
81
82 return ret;
83 }
84
85 static bool recycle_touch_mtime(vfs_handle_struct *handle)
86 {
87 bool ret;
88
89 ret = lp_parm_bool(SNUM(handle->conn), "recycle", "touch_mtime", False);
90
91 DEBUG(10, ("recycle: touch_mtime = %s\n", ret?"True":"False"));
92
93 return ret;
94 }
95
96 static const char **recycle_exclude(vfs_handle_struct *handle)
97 {
98 const char **tmp_lp;
99
100 tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "exclude", NULL);
101
102 DEBUG(10, ("recycle: exclude = %s ...\n", tmp_lp?*tmp_lp:""));
103
104 return tmp_lp;
105 }
106
107 static const char **recycle_exclude_dir(vfs_handle_struct *handle)
108 {
109 const char **tmp_lp;
110
111 tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "exclude_dir", NULL);
112
113 DEBUG(10, ("recycle: exclude_dir = %s ...\n", tmp_lp?*tmp_lp:""));
114
115 return tmp_lp;
116 }
117
118 static const char **recycle_noversions(vfs_handle_struct *handle)
119 {
120 const char **tmp_lp;
121
122 tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "noversions", NULL);
123
124 DEBUG(10, ("recycle: noversions = %s\n", tmp_lp?*tmp_lp:""));
125
126 return tmp_lp;
127 }
128
129 static off_t recycle_maxsize(vfs_handle_struct *handle)
130 {
131 off_t maxsize;
132
133 maxsize = conv_str_size(lp_parm_const_string(SNUM(handle->conn),
134 "recycle", "maxsize", NULL));
135
136 DEBUG(10, ("recycle: maxsize = %lu\n", (long unsigned int)maxsize));
137
138 return maxsize;
139 }
140
141 static off_t recycle_minsize(vfs_handle_struct *handle)
142 {
143 off_t minsize;
144
145 minsize = conv_str_size(lp_parm_const_string(SNUM(handle->conn),
146 "recycle", "minsize", NULL));
147
148 DEBUG(10, ("recycle: minsize = %lu\n", (long unsigned int)minsize));
149
150 return minsize;
151 }
152
153 static mode_t recycle_directory_mode(vfs_handle_struct *handle)
154 {
155 int dirmode;
156 const char *buff;
157
158 buff = lp_parm_const_string(SNUM(handle->conn), "recycle", "directory_mode", NULL);
159
160 if (buff != NULL ) {
161 sscanf(buff, "%o", &dirmode);
162 } else {
163 dirmode=S_IRUSR | S_IWUSR | S_IXUSR;
164 }
165
166 DEBUG(10, ("recycle: directory_mode = %o\n", dirmode));
167 return (mode_t)dirmode;
168 }
169
170 static mode_t recycle_subdir_mode(vfs_handle_struct *handle)
171 {
172 int dirmode;
173 const char *buff;
174
175 buff = lp_parm_const_string(SNUM(handle->conn), "recycle", "subdir_mode", NULL);
176
177 if (buff != NULL ) {
178 sscanf(buff, "%o", &dirmode);
179 } else {
180 dirmode=recycle_directory_mode(handle);
181 }
182
183 DEBUG(10, ("recycle: subdir_mode = %o\n", dirmode));
184 return (mode_t)dirmode;
185 }
186
187 static bool recycle_directory_exist(vfs_handle_struct *handle, const char *dname)
188 {
189 SMB_STRUCT_STAT st;
190
191 if (vfs_stat_smb_fname(handle->conn, dname, &st) == 0) {
192 if (S_ISDIR(st.st_ex_mode)) {
193 return True;
194 }
195 }
196
197 return False;
198 }
199
200 static bool recycle_file_exist(vfs_handle_struct *handle,
201 const struct smb_filename *smb_fname)
202 {
203 struct smb_filename *smb_fname_tmp = NULL;
204 bool ret = false;
205
206 smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
207 if (smb_fname_tmp == NULL) {
208 return false;
209 }
210
211 if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) == 0) {
212 if (S_ISREG(smb_fname_tmp->st.st_ex_mode)) {
213 ret = true;
214 }
215 }
216
217 TALLOC_FREE(smb_fname_tmp);
218 return ret;
219 }
220
221 /**
222 * Return file size
223 * @param conn connection
224 * @param fname file name
225 * @return size in bytes
226 **/
227 static off_t recycle_get_file_size(vfs_handle_struct *handle,
228 const struct smb_filename *smb_fname)
229 {
230 struct smb_filename *smb_fname_tmp = NULL;
231 off_t size;
232
233 smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
234 if (smb_fname_tmp == NULL) {
235 size = (off_t)0;
236 goto out;
237 }
238
239 if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) != 0) {
240 DEBUG(0,("recycle: stat for %s returned %s\n",
241 smb_fname_str_dbg(smb_fname_tmp), strerror(errno)));
242 size = (off_t)0;
243 goto out;
244 }
245
246 size = smb_fname_tmp->st.st_ex_size;
247 out:
248 TALLOC_FREE(smb_fname_tmp);
249 return size;
250 }
251
252 /**
253 * Create directory tree
254 * @param conn connection
255 * @param dname Directory tree to be created
256 * @return Returns True for success
257 **/
258 static bool recycle_create_dir(vfs_handle_struct *handle, const char *dname)
259 {
260 size_t len;
261 mode_t mode;
262 char *new_dir = NULL;
263 char *tmp_str = NULL;
264 char *token;
265 char *tok_str;
266 bool ret = False;
267 char *saveptr;
268
269 mode = recycle_directory_mode(handle);
270
271 tmp_str = SMB_STRDUP(dname);
272 ALLOC_CHECK(tmp_str, done);
273 tok_str = tmp_str;
274
275 len = strlen(dname)+1;
276 new_dir = (char *)SMB_MALLOC(len + 1);
277 ALLOC_CHECK(new_dir, done);
278 *new_dir = '\0';
279 if (dname[0] == '/') {
280 /* Absolute path. */
281 if (strlcat(new_dir,"/",len+1) >= len+1) {
282 goto done;
283 }
284 }
285
286 /* Create directory tree if neccessary */
287 for(token = strtok_r(tok_str, "/", &saveptr); token;
288 token = strtok_r(NULL, "/", &saveptr)) {
289 if (strlcat(new_dir, token, len+1) >= len+1) {
290 goto done;
291 }
292 if (recycle_directory_exist(handle, new_dir))
293 DEBUG(10, ("recycle: dir %s already exists\n", new_dir));
294 else {
295 DEBUG(5, ("recycle: creating new dir %s\n", new_dir));
296 if (SMB_VFS_NEXT_MKDIR(handle, new_dir, mode) != 0) {
297 DEBUG(1,("recycle: mkdir failed for %s with error: %s\n", new_dir, strerror(errno)));
298 ret = False;
299 goto done;
300 }
301 }
302 if (strlcat(new_dir, "/", len+1) >= len+1) {
303 goto done;
304 }
305 mode = recycle_subdir_mode(handle);
306 }
307
308 ret = True;
309 done:
310 SAFE_FREE(tmp_str);
311 SAFE_FREE(new_dir);
312 return ret;
313 }
314
315 /**
316 * Check if any of the components of "exclude_list" are contained in path.
317 * Return True if found
318 **/
319
320 static bool matchdirparam(const char **dir_exclude_list, char *path)
321 {
322 char *startp = NULL, *endp = NULL;
323
324 if (dir_exclude_list == NULL || dir_exclude_list[0] == NULL ||
325 *dir_exclude_list[0] == '\0' || path == NULL || *path == '\0') {
326 return False;
327 }
328
329 /*
330 * Walk the components of path, looking for matches with the
331 * exclude list on each component.
332 */
333
334 for (startp = path; startp; startp = endp) {
335 int i;
336
337 while (*startp == '/') {
338 startp++;
339 }
340 endp = strchr(startp, '/');
341 if (endp) {
342 *endp = '\0';
343 }
344
345 for(i=0; dir_exclude_list[i] ; i++) {
346 if(unix_wild_match(dir_exclude_list[i], startp)) {
347 /* Repair path. */
348 if (endp) {
349 *endp = '/';
350 }
351 return True;
352 }
353 }
354
355 /* Repair path. */
356 if (endp) {
357 *endp = '/';
358 }
359 }
360
361 return False;
362 }
363
364 /**
365 * Check if needle is contained in haystack, * and ? patterns are resolved
366 * @param haystack list of parameters separated by delimimiter character
367 * @param needle string to be matched exectly to haystack including pattern matching
368 * @return True if found
369 **/
370 static bool matchparam(const char **haystack_list, const char *needle)
371 {
372 int i;
373
374 if (haystack_list == NULL || haystack_list[0] == NULL ||
375 *haystack_list[0] == '\0' || needle == NULL || *needle == '\0') {
376 return False;
377 }
378
379 for(i=0; haystack_list[i] ; i++) {
380 if(unix_wild_match(haystack_list[i], needle)) {
381 return True;
382 }
383 }
384
385 return False;
386 }
387
388 /**
389 * Touch access or modify date
390 **/
391 static void recycle_do_touch(vfs_handle_struct *handle,
392 const struct smb_filename *smb_fname,
393 bool touch_mtime)
394 {
395 struct smb_filename *smb_fname_tmp = NULL;
396 struct smb_file_time ft;
397 int ret, err;
398
399 ZERO_STRUCT(ft);
400
401 smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
402 if (smb_fname_tmp == NULL) {
403 return;
404 }
405
406 if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) != 0) {
407 DEBUG(0,("recycle: stat for %s returned %s\n",
408 smb_fname_str_dbg(smb_fname_tmp), strerror(errno)));
409 goto out;
410 }
411 /* atime */
412 ft.atime = timespec_current();
413 /* mtime */
414 ft.mtime = touch_mtime ? ft.atime : smb_fname_tmp->st.st_ex_mtime;
415
416 become_root();
417 ret = SMB_VFS_NEXT_NTIMES(handle, smb_fname_tmp, &ft);
418 err = errno;
419 unbecome_root();
420 if (ret == -1 ) {
421 DEBUG(0, ("recycle: touching %s failed, reason = %s\n",
422 smb_fname_str_dbg(smb_fname_tmp), strerror(err)));
423 }
424 out:
425 TALLOC_FREE(smb_fname_tmp);
426 }
427
428 /**
429 * Check if file should be recycled
430 **/
431 static int recycle_unlink(vfs_handle_struct *handle,
432 const struct smb_filename *smb_fname)
433 {
434 connection_struct *conn = handle->conn;
435 char *path_name = NULL;
436 char *temp_name = NULL;
437 char *final_name = NULL;
438 struct smb_filename *smb_fname_final = NULL;
439 const char *base;
440 char *repository = NULL;
441 int i = 1;
442 off_t maxsize, minsize;
443 off_t file_size; /* space_avail; */
444 bool exist;
445 int rc = -1;
446
447 repository = talloc_sub_advanced(NULL, lp_servicename(talloc_tos(), SNUM(conn)),
448 conn->session_info->unix_info->unix_name,
449 conn->connectpath,
450 conn->session_info->unix_token->gid,
451 conn->session_info->unix_info->sanitized_username,
452 conn->session_info->info->domain_name,
453 recycle_repository(handle));
454 ALLOC_CHECK(repository, done);
455 /* shouldn't we allow absolute path names here? --metze */
456 /* Yes :-). JRA. */
457 trim_char(repository, '\0', '/');
458
459 if(!repository || *(repository) == '\0') {
460 DEBUG(3, ("recycle: repository path not set, purging %s...\n",
461 smb_fname_str_dbg(smb_fname)));
462 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
463 goto done;
464 }
465
466 /* we don't recycle the recycle bin... */
467 if (strncmp(smb_fname->base_name, repository,
468 strlen(repository)) == 0) {
469 DEBUG(3, ("recycle: File is within recycling bin, unlinking ...\n"));
470 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
471 goto done;
472 }
473
474 file_size = recycle_get_file_size(handle, smb_fname);
475 /* it is wrong to purge filenames only because they are empty imho
476 * --- simo
477 *
478 if(fsize == 0) {
479 DEBUG(3, ("recycle: File %s is empty, purging...\n", file_name));
480 rc = SMB_VFS_NEXT_UNLINK(handle,file_name);
481 goto done;
482 }
483 */
484
485 /* FIXME: this is wrong, we should check the whole size of the recycle bin is
486 * not greater then maxsize, not the size of the single file, also it is better
487 * to remove older files
488 */
489 maxsize = recycle_maxsize(handle);
490 if(maxsize > 0 && file_size > maxsize) {
491 DEBUG(3, ("recycle: File %s exceeds maximum recycle size, "
492 "purging... \n", smb_fname_str_dbg(smb_fname)));
493 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
494 goto done;
495 }
496 minsize = recycle_minsize(handle);
497 if(minsize > 0 && file_size < minsize) {
498 DEBUG(3, ("recycle: File %s lowers minimum recycle size, "
499 "purging... \n", smb_fname_str_dbg(smb_fname)));
500 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
501 goto done;
502 }
503
504 /* FIXME: this is wrong: moving files with rename does not change the disk space
505 * allocation
506 *
507 space_avail = SMB_VFS_NEXT_DISK_FREE(handle, ".", True, &bsize, &dfree, &dsize) * 1024L;
508 DEBUG(5, ("space_avail = %Lu, file_size = %Lu\n", space_avail, file_size));
509 if(space_avail < file_size) {
510 DEBUG(3, ("recycle: Not enough diskspace, purging file %s\n", file_name));
511 rc = SMB_VFS_NEXT_UNLINK(handle, file_name);
512 goto done;
513 }
514 */
515
516 /* extract filename and path */
517 base = strrchr(smb_fname->base_name, '/');
518 if (base == NULL) {
519 base = smb_fname->base_name;
520 path_name = SMB_STRDUP("/");
521 ALLOC_CHECK(path_name, done);
522 }
523 else {
524 path_name = SMB_STRDUP(smb_fname->base_name);
525 ALLOC_CHECK(path_name, done);
526 path_name[base - smb_fname->base_name] = '\0';
527 base++;
528 }
529
530 /* original filename with path */
531 DEBUG(10, ("recycle: fname = %s\n", smb_fname_str_dbg(smb_fname)));
532 /* original path */
533 DEBUG(10, ("recycle: fpath = %s\n", path_name));
534 /* filename without path */
535 DEBUG(10, ("recycle: base = %s\n", base));
536
537 if (matchparam(recycle_exclude(handle), base)) {
538 DEBUG(3, ("recycle: file %s is excluded \n", base));
539 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
540 goto done;
541 }
542
543 if (matchdirparam(recycle_exclude_dir(handle), path_name)) {
544 DEBUG(3, ("recycle: directory %s is excluded \n", path_name));
545 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
546 goto done;
547 }
548
549 if (recycle_keep_dir_tree(handle) == True) {
550 if (asprintf(&temp_name, "%s/%s", repository, path_name) == -1) {
551 ALLOC_CHECK(temp_name, done);
552 }
553 } else {
554 temp_name = SMB_STRDUP(repository);
555 }
556 ALLOC_CHECK(temp_name, done);
557
558 exist = recycle_directory_exist(handle, temp_name);
559 if (exist) {
560 DEBUG(10, ("recycle: Directory already exists\n"));
561 } else {
562 DEBUG(10, ("recycle: Creating directory %s\n", temp_name));
563 if (recycle_create_dir(handle, temp_name) == False) {
564 DEBUG(3, ("recycle: Could not create directory, "
565 "purging %s...\n",
566 smb_fname_str_dbg(smb_fname)));
567 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
568 goto done;
569 }
570 }
571
572 if (asprintf(&final_name, "%s/%s", temp_name, base) == -1) {
573 ALLOC_CHECK(final_name, done);
574 }
575
576 /* Create smb_fname with final base name and orig stream name. */
577 smb_fname_final = synthetic_smb_fname(talloc_tos(), final_name,
578 smb_fname->stream_name, NULL);
579 if (smb_fname_final == NULL) {
580 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
581 goto done;
582 }
583
584 /* new filename with path */
585 DEBUG(10, ("recycle: recycled file name: %s\n",
586 smb_fname_str_dbg(smb_fname_final)));
587
588 /* check if we should delete file from recycle bin */
589 if (recycle_file_exist(handle, smb_fname_final)) {
590 if (recycle_versions(handle) == False || matchparam(recycle_noversions(handle), base) == True) {
591 DEBUG(3, ("recycle: Removing old file %s from recycle "
592 "bin\n", smb_fname_str_dbg(smb_fname_final)));
593 if (SMB_VFS_NEXT_UNLINK(handle,
594 smb_fname_final) != 0) {
595 DEBUG(1, ("recycle: Error deleting old file: %s\n", strerror(errno)));
596 }
597 }
598 }
599
600 /* rename file we move to recycle bin */
601 i = 1;
602 while (recycle_file_exist(handle, smb_fname_final)) {
603 SAFE_FREE(final_name);
604 if (asprintf(&final_name, "%s/Copy #%d of %s", temp_name, i++, base) == -1) {
605 ALLOC_CHECK(final_name, done);
606 }
607 TALLOC_FREE(smb_fname_final->base_name);
608 smb_fname_final->base_name = talloc_strdup(smb_fname_final,
609 final_name);
610 if (smb_fname_final->base_name == NULL) {
611 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
612 goto done;
613 }
614 }
615
616 DEBUG(10, ("recycle: Moving %s to %s\n", smb_fname_str_dbg(smb_fname),
617 smb_fname_str_dbg(smb_fname_final)));
618 rc = SMB_VFS_NEXT_RENAME(handle, smb_fname, smb_fname_final);
619 if (rc != 0) {
620 DEBUG(3, ("recycle: Move error %d (%s), purging file %s "
621 "(%s)\n", errno, strerror(errno),
622 smb_fname_str_dbg(smb_fname),
623 smb_fname_str_dbg(smb_fname_final)));
624 rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
625 goto done;
626 }
627
628 /* touch access date of moved file */
629 if (recycle_touch(handle) == True || recycle_touch_mtime(handle))
630 recycle_do_touch(handle, smb_fname_final,
631 recycle_touch_mtime(handle));
632
633 done:
634 SAFE_FREE(path_name);
635 SAFE_FREE(temp_name);
636 SAFE_FREE(final_name);
637 TALLOC_FREE(smb_fname_final);
638 TALLOC_FREE(repository);
639 return rc;
640 }
641
642 static struct vfs_fn_pointers vfs_recycle_fns = {
643 .unlink_fn = recycle_unlink
644 };
645
646 NTSTATUS vfs_recycle_init(void);
647 NTSTATUS vfs_recycle_init(void)
648 {
649 NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "recycle",
650 &vfs_recycle_fns);
651
652 if (!NT_STATUS_IS_OK(ret))
653 return ret;
654
655 vfs_recycle_debug_level = debug_add_class("recycle");
656 if (vfs_recycle_debug_level == -1) {
657 vfs_recycle_debug_level = DBGC_VFS;
658 DEBUG(0, ("vfs_recycle: Couldn't register custom debugging class!\n"));
659 } else {
660 DEBUG(10, ("vfs_recycle: Debug class number of 'recycle': %d\n", vfs_recycle_debug_level));
661 }
662
663 return ret;
664 }
Samba GIT mirror