2 Unix SMB/CIFS implementation.
3 Filename utility functions.
4 Copyright (C) Tim Prouty 2009
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 * XXX: This is temporary and there should be no callers of this outside of
23 * this file once smb_filename is plumbed through all path based operations.
24 * The one legitimate caller currently is smb_fname_str_dbg(), which this
25 * could be made static for.
27 NTSTATUS get_full_smb_filename(TALLOC_CTX *ctx,
28 const struct smb_filename *smb_fname,
31 if (smb_fname->stream_name) {
32 /* stream_name must always be NULL if there is no stream. */
33 SMB_ASSERT(smb_fname->stream_name[0] != '\0');
35 *full_name = talloc_asprintf(ctx, "%s%s", smb_fname->base_name,
36 smb_fname->stream_name);
38 *full_name = talloc_strdup(ctx, smb_fname->base_name);
42 return NT_STATUS_NO_MEMORY;
49 * There are actually legitimate callers of this such as functions that
50 * enumerate streams using the vfs_streaminfo interface and then want to
51 * operate on each stream.
53 struct smb_filename *synthetic_smb_fname(TALLOC_CTX *mem_ctx,
54 const char *base_name,
55 const char *stream_name,
56 const SMB_STRUCT_STAT *psbuf,
59 struct smb_filename smb_fname_loc = { 0, };
61 /* Setup the base_name/stream_name. */
62 smb_fname_loc.base_name = discard_const_p(char, base_name);
63 smb_fname_loc.stream_name = discard_const_p(char, stream_name);
64 smb_fname_loc.flags = flags;
66 /* Copy the psbuf if one was given. */
68 smb_fname_loc.st = *psbuf;
70 /* Let cp_smb_filename() do the heavy lifting. */
71 return cp_smb_filename(mem_ctx, &smb_fname_loc);
75 * Utility function used by VFS calls that must *NOT* operate
76 * on a stream filename, only the base_name.
78 struct smb_filename *cp_smb_filename_nostream(TALLOC_CTX *mem_ctx,
79 const struct smb_filename *smb_fname_in)
81 struct smb_filename *smb_fname = cp_smb_filename(mem_ctx,
83 if (smb_fname == NULL) {
86 TALLOC_FREE(smb_fname->stream_name);
91 * There are a few legitimate users of this.
93 struct smb_filename *synthetic_smb_fname_split(TALLOC_CTX *ctx,
97 char *stream_name = NULL;
98 char *base_name = NULL;
99 struct smb_filename *ret;
103 /* No stream name looked for. */
104 return synthetic_smb_fname(ctx,
108 SMB_FILENAME_POSIX_PATH);
111 ok = split_stream_filename(ctx,
119 ret = synthetic_smb_fname(ctx, base_name, stream_name, NULL, 0);
120 TALLOC_FREE(base_name);
121 TALLOC_FREE(stream_name);
126 * Return a string using the talloc_tos()
128 const char *smb_fname_str_dbg(const struct smb_filename *smb_fname)
133 if (smb_fname == NULL) {
136 status = get_full_smb_filename(talloc_tos(), smb_fname, &fname);
137 if (!NT_STATUS_IS_OK(status)) {
144 * Return a debug string of the path name of an fsp using the talloc_tos().
146 const char *fsp_str_dbg(const struct files_struct *fsp)
148 return smb_fname_str_dbg(fsp->fsp_name);
152 * Create a debug string for the fnum of an fsp.
154 * This is allocated to talloc_tos() or a string constant
155 * in certain corner cases. The returned string should
156 * hence not be free'd directly but only via the talloc stack.
158 const char *fsp_fnum_dbg(const struct files_struct *fsp)
163 return "fnum [fsp is NULL]";
166 if (fsp->fnum == FNUM_FIELD_INVALID) {
167 return "fnum [invalid value]";
170 str = talloc_asprintf(talloc_tos(), "fnum %llu",
171 (unsigned long long)fsp->fnum);
173 DEBUG(1, ("%s: talloc_asprintf failed\n", __FUNCTION__));
174 return "fnum [talloc failed!]";
180 struct smb_filename *cp_smb_filename(TALLOC_CTX *mem_ctx,
181 const struct smb_filename *in)
183 struct smb_filename *out;
185 size_t stream_len = 0;
188 /* stream_name must always be NULL if there is no stream. */
189 if (in->stream_name) {
190 SMB_ASSERT(in->stream_name[0] != '\0');
193 if (in->base_name != NULL) {
194 base_len = strlen(in->base_name) + 1;
197 if (in->stream_name != NULL) {
198 stream_len = strlen(in->stream_name) + 1;
202 out = talloc_pooled_object(mem_ctx, struct smb_filename,
203 num, stream_len + base_len);
210 * The following allocations cannot fail as we
211 * pre-allocated space for them in the out pooled
214 if (in->base_name != NULL) {
215 out->base_name = talloc_memdup(
216 out, in->base_name, base_len);
217 talloc_set_name_const(out->base_name,
220 if (in->stream_name != NULL) {
221 out->stream_name = talloc_memdup(
222 out, in->stream_name, stream_len);
223 talloc_set_name_const(out->stream_name,
226 out->flags = in->flags;
232 * Return allocated parent directory and basename of path
234 * Note: if requesting name, it is returned as talloc child of the
235 * parent. Freeing the parent is thus sufficient to free both.
237 bool parent_smb_fname(TALLOC_CTX *mem_ctx,
238 const struct smb_filename *path,
239 struct smb_filename **_parent,
240 struct smb_filename **_name)
242 TALLOC_CTX *frame = talloc_stackframe();
243 struct smb_filename *parent = NULL;
244 struct smb_filename *name = NULL;
247 parent = cp_smb_filename(frame, path);
248 if (parent == NULL) {
252 TALLOC_FREE(parent->stream_name);
253 SET_STAT_INVALID(parent->st);
255 p = strrchr_m(parent->base_name, '/'); /* Find final '/', if any */
257 TALLOC_FREE(parent->base_name);
258 parent->base_name = talloc_strdup(parent, ".");
259 if (parent->base_name == NULL) {
270 *_parent = talloc_move(mem_ctx, &parent);
275 name = cp_smb_filename(frame, path);
280 TALLOC_FREE(name->base_name);
282 name->base_name = talloc_strdup(mem_ctx, p);
288 *_parent = talloc_move(mem_ctx, &parent);
289 *_name = talloc_move(*_parent, &name);
294 static void assert_valid_stream_smb_fname(const struct smb_filename *smb_fname)
296 /* stream_name must always be NULL if there is no stream. */
297 if (smb_fname->stream_name) {
298 SMB_ASSERT(smb_fname->stream_name[0] != '\0');
301 if (smb_fname->flags & SMB_FILENAME_POSIX_PATH) {
302 SMB_ASSERT(smb_fname->stream_name == NULL);
306 /****************************************************************************
307 Simple check to determine if a smb_fname is a real named stream or the
309 ***************************************************************************/
311 bool is_ntfs_stream_smb_fname(const struct smb_filename *smb_fname)
313 assert_valid_stream_smb_fname(smb_fname);
315 if (smb_fname->stream_name == NULL) {
322 /****************************************************************************
323 Simple check to determine if a smb_fname is pointing to a normal file or
324 a named stream that is not the default stream "::$DATA".
329 foo:bar:$DATA -> true
331 ***************************************************************************/
333 bool is_named_stream(const struct smb_filename *smb_fname)
335 assert_valid_stream_smb_fname(smb_fname);
337 if (smb_fname->stream_name == NULL) {
341 if (strequal_m(smb_fname->stream_name, "::$DATA")) {
348 /****************************************************************************
349 Returns true if the filename's stream == "::$DATA"
350 ***************************************************************************/
351 bool is_ntfs_default_stream_smb_fname(const struct smb_filename *smb_fname)
353 assert_valid_stream_smb_fname(smb_fname);
355 if (smb_fname->stream_name == NULL) {
359 return strequal_m(smb_fname->stream_name, "::$DATA");
362 /****************************************************************************
363 Filter out Windows invalid EA names (list probed from Windows 2012).
364 ****************************************************************************/
366 static char bad_ea_name_chars[] = "\"*+,/:;<=>?[\\]|";
368 bool is_invalid_windows_ea_name(const char *name)
371 /* EA name is pulled as ascii so we can examine
372 individual bytes here. */
373 for (i = 0; name[i] != 0; i++) {
374 int val = (name[i] & 0xff);
375 if (val < ' ' || strchr(bad_ea_name_chars, val)) {
382 bool ea_list_has_invalid_name(struct ea_list *ea_list)
384 for (;ea_list; ea_list = ea_list->next) {
385 if (is_invalid_windows_ea_name(ea_list->ea.name)) {
392 /****************************************************************************
393 Split an incoming name into tallocd filename and stream components.
394 Returns true on success, false on out of memory.
395 ****************************************************************************/
397 bool split_stream_filename(TALLOC_CTX *ctx,
398 const char *filename_in,
400 char **streamname_out)
402 const char *stream_name = NULL;
403 char *stream_out = NULL;
404 char *file_out = NULL;
406 stream_name = strchr_m(filename_in, ':');
409 stream_out = talloc_strdup(ctx, stream_name);
410 if (stream_out == NULL) {
413 file_out = talloc_strndup(ctx,
415 PTR_DIFF(stream_name, filename_in));
417 file_out = talloc_strdup(ctx, filename_in);
420 if (file_out == NULL) {
421 TALLOC_FREE(stream_out);
426 *filename_out = file_out;
428 if (streamname_out) {
429 *streamname_out = stream_out;