2 * Recycle bin VFS module for Samba.
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
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #define ALLOC_CHECK(ptr, label) do { if ((ptr) == NULL) { DEBUG(0, ("recycle.bin: out of memory!\n")); errno = ENOMEM; goto label; } } while(0)
29 static int vfs_recycle_debug_level = DBGC_VFS;
32 #define DBGC_CLASS vfs_recycle_debug_level
34 static const char *delimiter = "|"; /* delimiter for options */
36 /* One per connection */
38 typedef struct recycle_bin_struct
41 char *repository; /* name of the recycle bin directory */
42 BOOL keep_dir_tree; /* keep directory structure of deleted file in recycle bin */
43 BOOL versions; /* create versions of deleted files with identical name */
44 BOOL touch; /* touch access date of deleted file */
45 char *exclude; /* which files to exclude */
46 char *exclude_dir; /* which directories to exclude */
47 char *noversions; /* which files to exclude from versioning */
48 SMB_OFF_T maxsize; /* maximum file size to be saved */
52 static struct vfs_ops default_vfs_ops; /* For passthrough operation */
54 static int recycle_connect(struct connection_struct *conn, const char *service, const char *user);
55 static void recycle_disconnect(struct connection_struct *conn);
56 static int recycle_unlink(connection_struct *, const char *);
58 #define VFS_OP(x) ((void *) x)
60 static vfs_op_tuple recycle_ops[] = {
63 {VFS_OP(recycle_connect), SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_TRANSPARENT},
64 {VFS_OP(recycle_disconnect), SMB_VFS_OP_DISCONNECT, SMB_VFS_LAYER_TRANSPARENT},
67 {VFS_OP(recycle_unlink), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
69 {NULL, SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
72 static BOOL check_bool_param(const char *value)
74 if (strwicmp(value, "yes") == 0 ||
75 strwicmp(value, "true") == 0 ||
76 strwicmp(value, "1") == 0)
83 * VFS initialisation function.
85 * @retval initialised vfs_op_tuple array
87 static vfs_op_tuple *recycle_init(const struct vfs_ops *def_vfs_ops,
88 struct smb_vfs_handle_struct *vfs_handle)
90 DEBUG(10, ("Initializing VFS module recycle\n"));
91 memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops));
92 vfs_recycle_debug_level = debug_add_class("vfs_recycle_bin");
93 if (vfs_recycle_debug_level == -1) {
94 vfs_recycle_debug_level = DBGC_VFS;
95 DEBUG(0, ("vfs_recycle: Couldn't register custom debugging class!\n"));
97 DEBUG(0, ("vfs_recycle: Debug class number of 'vfs_recycle': %d\n", vfs_recycle_debug_level));
103 static int recycle_connect(struct connection_struct *conn, const char *service, const char *user)
105 TALLOC_CTX *ctx = NULL;
106 recycle_bin_struct *recbin;
110 DEBUG(10, ("Called for service %s (%d) as user %s\n", service, SNUM(conn), user));
112 if (!(ctx = talloc_init("recycle bin"))) {
113 DEBUG(0, ("Failed to allocate memory in VFS module recycle_bin\n"));
117 recbin = talloc(ctx,sizeof(recycle_bin_struct));
118 if ( recbin == NULL) {
119 DEBUG(0, ("Failed to allocate memory in VFS module recycle_bin\n"));
125 recbin->repository = talloc_strdup(ctx, ".recycle");
126 ALLOC_CHECK(recbin->repository, error);
127 recbin->keep_dir_tree = False;
128 recbin->versions = False;
129 recbin->touch = False;
130 recbin->exclude = "";
131 recbin->exclude_dir = "";
132 recbin->noversions = "";
135 /* parse configuration options */
136 servicename = talloc_strdup(recbin->ctx, lp_servicename(SNUM(conn)));
137 DEBUG(10, ("servicename = %s\n",servicename));
138 if ((tmp_str = lp_parm_string(servicename, "vfs_recycle_bin", "repository")) != NULL) {
139 recbin->repository = talloc_sub_conn(ctx, conn, tmp_str);
140 ALLOC_CHECK(recbin->repository, error);
141 trim_string(recbin->repository, "/", "/");
142 DEBUG(5, ("recycle.bin: repository = %s\n", recbin->repository));
144 if ((tmp_str = lp_parm_string(servicename, "vfs_recycle_bin", "keeptree")) != NULL) {
145 if (check_bool_param(tmp_str) == True)
146 recbin->keep_dir_tree = True;
147 DEBUG(5, ("recycle.bin: keeptree = %s\n", tmp_str));
149 if ((tmp_str = lp_parm_string(servicename, "vfs_recycle_bin", "versions")) != NULL) {
150 if (check_bool_param(tmp_str) == True)
151 recbin->versions = True;
152 DEBUG(5, ("recycle.bin: versions = %s\n", tmp_str));
154 if ((tmp_str = lp_parm_string(servicename, "vfs_recycle_bin", "touch")) != NULL) {
155 if (check_bool_param(tmp_str) == True)
156 recbin->touch = True;
157 DEBUG(5, ("recycle.bin: touch = %s\n", tmp_str));
159 if ((tmp_str = lp_parm_string(servicename, "vfs_recycle_bin", "maxsize")) != NULL) {
160 recbin->maxsize = strtoul(tmp_str, NULL, 10);
161 if (recbin->maxsize == 0) {
162 recbin->maxsize = -1;
163 DEBUG(5, ("recycle.bin: maxsize = -infinite-\n"));
165 DEBUG(5, ("recycle.bin: maxsize = %ld\n", (long int)recbin->maxsize));
168 if ((tmp_str = lp_parm_string(servicename, "vfs_recycle_bin", "exclude")) != NULL) {
169 recbin->exclude = talloc_strdup(ctx, tmp_str);
170 ALLOC_CHECK(recbin->exclude, error);
171 DEBUG(5, ("recycle.bin: exclude = %s\n", recbin->exclude));
173 if ((tmp_str = lp_parm_string(servicename,"vfs_recycle_bin", "exclude_dir")) != NULL) {
174 recbin->exclude_dir = talloc_strdup(ctx, tmp_str);
175 ALLOC_CHECK(recbin->exclude_dir, error);
176 DEBUG(5, ("recycle.bin: exclude_dir = %s\n", recbin->exclude_dir));
178 if ((tmp_str = lp_parm_string(servicename,"vfs_recycle_bin", "noversions")) != NULL) {
179 recbin->noversions = talloc_strdup(ctx, tmp_str);
180 ALLOC_CHECK(recbin->noversions, error);
181 DEBUG(5, ("recycle.bin: noversions = %s\n", recbin->noversions));
184 conn->vfs_private = (void *)recbin;
185 return default_vfs_ops.connect(conn, service, user);
192 static void recycle_disconnect(struct connection_struct *conn)
194 DEBUG(10, ("Disconnecting VFS module recycle bin\n"));
195 if (conn->vfs_private) {
196 talloc_destroy(((recycle_bin_struct *)conn->vfs_private)->ctx);
197 conn->vfs_private = NULL;
199 default_vfs_ops.disconnect(conn);
202 static BOOL recycle_directory_exist(connection_struct *conn, const char *dname)
206 if (default_vfs_ops.stat(conn, dname, &st) == 0) {
207 if (S_ISDIR(st.st_mode)) {
215 static BOOL recycle_file_exist(connection_struct *conn, const char *fname)
219 if (default_vfs_ops.stat(conn, fname, &st) == 0) {
220 if (S_ISREG(st.st_mode)) {
230 * @param conn connection
231 * @param fname file name
232 * @return size in bytes
234 static SMB_OFF_T recycle_get_file_size(connection_struct *conn, const char *fname)
237 if (default_vfs_ops.stat(conn, fname, &st) != 0) {
238 DEBUG(0,("recycle.bin: stat for %s returned %s\n", fname, strerror(errno)));
245 * Create directory tree
246 * @param conn connection
247 * @param dname Directory tree to be created
248 * @return Returns True for success
250 static BOOL recycle_create_dir(connection_struct *conn, const char *dname)
254 char *new_dir = NULL;
255 char *tmp_str = NULL;
260 mode = S_IREAD | S_IWRITE | S_IEXEC;
262 tmp_str = strdup(dname);
263 ALLOC_CHECK(tmp_str, done);
267 new_dir = (char *)malloc(len + 1);
268 ALLOC_CHECK(new_dir, done);
271 /* Create directory tree if neccessary */
272 for(token = strtok(tok_str, "/"); token; token = strtok(NULL, "/")) {
273 safe_strcat(new_dir, token, len);
274 if (recycle_directory_exist(conn, new_dir))
275 DEBUG(10, ("recycle.bin: dir %s already exists\n", new_dir));
277 DEBUG(5, ("recycle.bin: creating new dir %s\n", new_dir));
278 if (default_vfs_ops.mkdir(conn, new_dir, mode) != 0) {
279 DEBUG(1,("recycle.bin: mkdir failed for %s with error: %s\n", new_dir, strerror(errno)));
284 safe_strcat(new_dir, "/", len);
295 * Check if needle is contained exactly in haystack
296 * @param haystack list of parameters separated by delimimiter character
297 * @param needle string to be matched exactly to haystack
298 * @return True if found
300 static BOOL checkparam(const char *haystack, const char *needle)
307 if (haystack == NULL || strlen(haystack) == 0 || needle == NULL || strlen(needle) == 0) {
311 tmp_str = strdup(haystack);
312 ALLOC_CHECK(tmp_str, done);
313 token = tok_str = tmp_str;
315 for(token = strtok(tok_str, delimiter); token; token = strtok(NULL, delimiter)) {
316 if(strcmp(token, needle) == 0) {
327 * Check if needle is contained in haystack, * and ? patterns are resolved
328 * @param haystack list of parameters separated by delimimiter character
329 * @param needle string to be matched exectly to haystack including pattern matching
330 * @return True if found
332 static BOOL matchparam(const char *haystack, const char *needle)
339 if (haystack == NULL || strlen(haystack) == 0 || needle == NULL || strlen(needle) == 0) {
343 tmp_str = strdup(haystack);
344 ALLOC_CHECK(tmp_str, done);
345 token = tok_str = tmp_str;
347 for(token = strtok(tok_str, delimiter); token; token = strtok(NULL, delimiter)) {
348 if (!unix_wild_match(token, needle)) {
361 static void recycle_touch(connection_struct *conn, const char *fname)
367 if (default_vfs_ops.stat(conn, fname, &st) != 0) {
368 DEBUG(0,("recycle.bin: stat for %s returned %s\n", fname, strerror(errno)));
371 currtime = time(&currtime);
372 tb.actime = currtime;
373 tb.modtime = st.st_mtime;
375 if (default_vfs_ops.utime(conn, fname, &tb) == -1 )
376 DEBUG(0, ("recycle.bin: touching %s failed, reason = %s\n", fname, strerror(errno)));
380 * Check if file should be recycled
382 static int recycle_unlink(connection_struct *conn, const char *inname)
384 recycle_bin_struct *recbin;
385 char *file_name = NULL;
386 char *path_name = NULL;
387 char *temp_name = NULL;
388 char *final_name = NULL;
391 SMB_BIG_UINT dfree, dsize, bsize;
392 SMB_OFF_T file_size, space_avail;
396 file_name = strdup(inname);
397 ALLOC_CHECK(file_name, done);
399 if (conn->vfs_private)
400 recbin = (recycle_bin_struct *)conn->vfs_private;
402 DEBUG(0, ("Recycle bin not initialized!\n"));
403 rc = default_vfs_ops.unlink(conn, file_name);
407 if(!recbin->repository || *(recbin->repository) == '\0') {
408 DEBUG(3, ("Recycle path not set, purging %s...\n", file_name));
409 rc = default_vfs_ops.unlink(conn, file_name);
413 /* we don't recycle the recycle bin... */
414 if (strncmp(file_name, recbin->repository, strlen(recbin->repository)) == 0) {
415 DEBUG(3, ("File is within recycling bin, unlinking ...\n"));
416 rc = default_vfs_ops.unlink(conn, file_name);
420 file_size = recycle_get_file_size(conn, file_name);
421 /* it is wrong to purge filenames only because they are empty imho
425 DEBUG(3, ("File %s is empty, purging...\n", file_name));
426 rc = default_vfs_ops.unlink(conn,file_name);
431 /* FIXME: this is wrong, we should check the hole size of the recycle bin is
432 * not greater then maxsize, not the size of the single file, also it is better
433 * to remove older files
435 if(recbin->maxsize > 0 && file_size > recbin->maxsize) {
436 DEBUG(3, ("File %s exceeds maximum recycle size, purging... \n", file_name));
437 rc = default_vfs_ops.unlink(conn, file_name);
441 /* FIXME: this is wrong: moving files with rename does not change the disk space
444 space_avail = default_vfs_ops.disk_free(conn, ".", True, &bsize, &dfree, &dsize) * 1024L;
445 DEBUG(5, ("space_avail = %Lu, file_size = %Lu\n", space_avail, file_size));
446 if(space_avail < file_size) {
447 DEBUG(3, ("Not enough diskspace, purging file %s\n", file_name));
448 rc = default_vfs_ops.unlink(conn, file_name);
453 /* extract filename and path */
454 base = strrchr(file_name, '/');
457 path_name = strdup("/");
458 ALLOC_CHECK(path_name, done);
461 path_name = strdup(file_name);
462 ALLOC_CHECK(path_name, done);
463 path_name[base - file_name] = '\0';
467 DEBUG(10, ("recycle.bin: fname = %s\n", file_name)); /* original filename with path */
468 DEBUG(10, ("recycle.bin: fpath = %s\n", path_name)); /* original path */
469 DEBUG(10, ("recycle.bin: base = %s\n", base)); /* filename without path */
471 if (matchparam(recbin->exclude, base)) {
472 DEBUG(3, ("recycle.bin: file %s is excluded \n", base));
473 rc = default_vfs_ops.unlink(conn, file_name);
477 /* FIXME: this check will fail if we have more than one level of directories,
478 * we shoud check for every level 1, 1/2, 1/2/3, 1/2/3/4 ....
481 if (checkparam(recbin->exclude_dir, path_name)) {
482 DEBUG(3, ("recycle.bin: directory %s is excluded \n", path_name));
483 rc = default_vfs_ops.unlink(conn, file_name);
487 /* see if we need to recreate the original directory structure in the recycle bin */
488 if (recbin->keep_dir_tree == True) {
489 asprintf(&temp_name, "%s/%s", recbin->repository, path_name);
491 temp_name = strdup(recbin->repository);
493 ALLOC_CHECK(temp_name, done);
495 exist = recycle_directory_exist(conn, temp_name);
497 DEBUG(10, ("recycle.bin: Directory already exists\n"));
499 DEBUG(10, ("recycle.bin: Creating directory %s\n", temp_name));
500 if (recycle_create_dir(conn, temp_name) == False) {
501 DEBUG(3, ("Could not create directory, purging %s...\n", file_name));
502 rc = default_vfs_ops.unlink(conn, file_name);
507 final_name = (char *)malloc(PATH_MAX);
508 ALLOC_CHECK(final_name, done);
509 snprintf(final_name, PATH_MAX, "%s/%s", temp_name, base);
510 DEBUG(10, ("recycle.bin: recycled file name%s\n", temp_name)); /* new filename with path */
512 /* check if we should delete file from recycle bin */
513 if (recycle_file_exist(conn, final_name)) {
514 if (recbin->versions == False || matchparam(recbin->noversions, base) == True) {
515 DEBUG(3, ("recycle.bin: Removing old file %s from recycle bin\n", final_name));
516 if (default_vfs_ops.unlink(conn, final_name) != 0) {
517 DEBUG(1, ("recycle.bin: Error deleting old file: %s\n", strerror(errno)));
522 /* rename file we move to recycle bin */
524 while (recycle_file_exist(conn, final_name)) {
525 snprintf(final_name, PATH_MAX, "%s/Copy #%d of %s", temp_name, i++, base);
528 DEBUG(10, ("recycle.bin: Moving %s to %s\n", file_name, final_name));
529 rc = default_vfs_ops.rename(conn, file_name, final_name);
531 DEBUG(3, ("recycle.bin: Move error %d (%s), purging file %s (%s)\n", errno, strerror(errno), file_name, final_name));
532 rc = default_vfs_ops.unlink(conn, file_name);
536 /* touch access date of moved file */
537 if (recbin->touch == True )
538 recycle_touch(conn, final_name);
541 SAFE_FREE(file_name);
542 SAFE_FREE(path_name);
543 SAFE_FREE(temp_name);
544 SAFE_FREE(final_name);
548 int vfs_recycle_init(void)
550 return smb_register_vfs("recycle", recycle_init, SMB_VFS_INTERFACE_VERSION);