1 /*
2 * adm_files.c: helper routines for handling files & dirs in the
3 * working copy administrative area (creating,
4 * deleting, opening, and closing). This is the only
5 * code that actually knows where administrative
6 * information is kept.
7 *
8 * ====================================================================
9 * Licensed to the Apache Software Foundation (ASF) under one
10 * or more contributor license agreements. See the NOTICE file
11 * distributed with this work for additional information
12 * regarding copyright ownership. The ASF licenses this file
13 * to you under the Apache License, Version 2.0 (the
14 * "License"); you may not use this file except in compliance
15 * with the License. You may obtain a copy of the License at
16 *
17 * http://www.apache.org/licenses/LICENSE-2.0
18 *
19 * Unless required by applicable law or agreed to in writing,
20 * software distributed under the License is distributed on an
21 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
22 * KIND, either express or implied. See the License for the
23 * specific language governing permissions and limitations
24 * under the License.
25 * ====================================================================
26 */
27
28
29
30 #include <stdarg.h>
31 #include <apr_pools.h>
32 #include <apr_file_io.h>
33 #include <apr_strings.h>
34
35 #include "svn_types.h"
36 #include "svn_error.h"
37 #include "svn_io.h"
38 #include "svn_dirent_uri.h"
39 #include "svn_path.h"
40 #include "svn_hash.h"
41
42 #include "wc.h"
43 #include "adm_files.h"
44 #include "entries.h"
45 #include "lock.h"
46
47 #include "svn_private_config.h"
48 #include "private/svn_wc_private.h"
49
50
51 /*** File names in the adm area. ***/
52
53 /* The default name of the WC admin directory. This name is always
54 checked by svn_wc_is_adm_dir. */
55 static const char default_adm_dir_name[] = ".svn";
56
57 /* The name that is actually used for the WC admin directory. The
58 commonest case where this won't be the default is in Windows
59 ASP.NET development environments, which used to choke on ".svn". */
60 static const char *adm_dir_name = default_adm_dir_name;
61
62
63 svn_boolean_t
svn_wc_is_adm_dir(const char * name,apr_pool_t * pool)64 svn_wc_is_adm_dir(const char *name, apr_pool_t *pool)
65 {
66 return (0 == strcmp(name, adm_dir_name)
67 || 0 == strcmp(name, default_adm_dir_name));
68 }
69
70
71 const char *
svn_wc_get_adm_dir(apr_pool_t * pool)72 svn_wc_get_adm_dir(apr_pool_t *pool)
73 {
74 return adm_dir_name;
75 }
76
77
78 svn_error_t *
svn_wc_set_adm_dir(const char * name,apr_pool_t * pool)79 svn_wc_set_adm_dir(const char *name, apr_pool_t *pool)
80 {
81 /* This is the canonical list of administrative directory names.
82
83 FIXME:
84 An identical list is used in
85 libsvn_subr/opt.c:svn_opt__args_to_target_array(),
86 but that function can't use this list, because that use would
87 create a circular dependency between libsvn_wc and libsvn_subr.
88 Make sure changes to the lists are always synchronized! */
89 static const char *valid_dir_names[] = {
90 default_adm_dir_name,
91 "_svn",
92 NULL
93 };
94
95 const char **dir_name;
96 for (dir_name = valid_dir_names; *dir_name; ++dir_name)
97 if (0 == strcmp(name, *dir_name))
98 {
99 /* Use the pointer to the statically allocated string
100 constant, to avoid potential pool lifetime issues. */
101 adm_dir_name = *dir_name;
102 return SVN_NO_ERROR;
103 }
104 return svn_error_createf(SVN_ERR_BAD_FILENAME, NULL,
105 _("'%s' is not a valid administrative "
106 "directory name"),
107 svn_dirent_local_style(name, pool));
108 }
109
110
111 const char *
svn_wc__adm_child(const char * path,const char * child,apr_pool_t * result_pool)112 svn_wc__adm_child(const char *path,
113 const char *child,
114 apr_pool_t *result_pool)
115 {
116 return svn_dirent_join_many(result_pool,
117 path,
118 adm_dir_name,
119 child,
120 SVN_VA_NULL);
121 }
122
123
124 svn_boolean_t
svn_wc__adm_area_exists(const char * adm_abspath,apr_pool_t * pool)125 svn_wc__adm_area_exists(const char *adm_abspath,
126 apr_pool_t *pool)
127 {
128 const char *path = svn_wc__adm_child(adm_abspath, NULL, pool);
129 svn_node_kind_t kind;
130 svn_error_t *err;
131
132 err = svn_io_check_path(path, &kind, pool);
133 if (err)
134 {
135 svn_error_clear(err);
136 /* Return early, since kind is undefined in this case. */
137 return FALSE;
138 }
139
140 return kind != svn_node_none;
141 }
142
143
144
145 /*** Making and using files in the adm area. ***/
146
147
148 /* */
149 static svn_error_t *
make_adm_subdir(const char * path,const char * subdir,apr_pool_t * pool)150 make_adm_subdir(const char *path,
151 const char *subdir,
152 apr_pool_t *pool)
153 {
154 const char *fullpath;
155
156 fullpath = svn_wc__adm_child(path, subdir, pool);
157
158 return svn_io_dir_make(fullpath, APR_OS_DEFAULT, pool);
159 }
160
161
162
163 /*** Syncing files in the adm area. ***/
164
165
166 svn_error_t *
svn_wc__text_base_path_to_read(const char ** result_abspath,svn_wc__db_t * db,const char * local_abspath,apr_pool_t * result_pool,apr_pool_t * scratch_pool)167 svn_wc__text_base_path_to_read(const char **result_abspath,
168 svn_wc__db_t *db,
169 const char *local_abspath,
170 apr_pool_t *result_pool,
171 apr_pool_t *scratch_pool)
172 {
173 svn_wc__db_status_t status;
174 svn_node_kind_t kind;
175 const svn_checksum_t *checksum;
176
177 SVN_ERR(svn_wc__db_read_pristine_info(&status, &kind, NULL, NULL, NULL, NULL,
178 &checksum, NULL, NULL, NULL,
179 db, local_abspath,
180 scratch_pool, scratch_pool));
181
182 /* Sanity */
183 if (kind != svn_node_file)
184 return svn_error_createf(SVN_ERR_NODE_UNEXPECTED_KIND, NULL,
185 _("Can only get the pristine contents of files; "
186 "'%s' is not a file"),
187 svn_dirent_local_style(local_abspath,
188 scratch_pool));
189
190 if (status == svn_wc__db_status_not_present)
191 /* We know that the delete of this node has been committed.
192 This should be the same as if called on an unknown path. */
193 return svn_error_createf(SVN_ERR_WC_PATH_NOT_FOUND, NULL,
194 _("Cannot get the pristine contents of '%s' "
195 "because its delete is already committed"),
196 svn_dirent_local_style(local_abspath,
197 scratch_pool));
198 else if (status == svn_wc__db_status_server_excluded
199 || status == svn_wc__db_status_excluded
200 || status == svn_wc__db_status_incomplete)
201 return svn_error_createf(SVN_ERR_WC_PATH_UNEXPECTED_STATUS, NULL,
202 _("Cannot get the pristine contents of '%s' "
203 "because it has an unexpected status"),
204 svn_dirent_local_style(local_abspath,
205 scratch_pool));
206
207 if (checksum == NULL)
208 return svn_error_createf(SVN_ERR_WC_PATH_UNEXPECTED_STATUS, NULL,
209 _("Node '%s' has no pristine text"),
210 svn_dirent_local_style(local_abspath,
211 scratch_pool));
212 SVN_ERR(svn_wc__db_pristine_get_path(result_abspath, db, local_abspath,
213 checksum,
214 result_pool, scratch_pool));
215 return SVN_NO_ERROR;
216 }
217
218 svn_error_t *
svn_wc__get_pristine_contents(svn_stream_t ** contents,svn_filesize_t * size,svn_wc__db_t * db,const char * local_abspath,apr_pool_t * result_pool,apr_pool_t * scratch_pool)219 svn_wc__get_pristine_contents(svn_stream_t **contents,
220 svn_filesize_t *size,
221 svn_wc__db_t *db,
222 const char *local_abspath,
223 apr_pool_t *result_pool,
224 apr_pool_t *scratch_pool)
225 {
226 svn_wc__db_status_t status;
227 svn_node_kind_t kind;
228 const svn_checksum_t *sha1_checksum;
229
230 if (size)
231 *size = SVN_INVALID_FILESIZE;
232
233 SVN_ERR(svn_wc__db_read_pristine_info(&status, &kind, NULL, NULL, NULL, NULL,
234 &sha1_checksum, NULL, NULL, NULL,
235 db, local_abspath,
236 scratch_pool, scratch_pool));
237
238 /* Sanity */
239 if (kind != svn_node_file)
240 return svn_error_createf(SVN_ERR_NODE_UNEXPECTED_KIND, NULL,
241 _("Can only get the pristine contents of files; "
242 "'%s' is not a file"),
243 svn_dirent_local_style(local_abspath,
244 scratch_pool));
245
246 if (status == svn_wc__db_status_added && !sha1_checksum)
247 {
248 /* Simply added. The pristine base does not exist. */
249 *contents = NULL;
250 return SVN_NO_ERROR;
251 }
252 else if (status == svn_wc__db_status_not_present)
253 /* We know that the delete of this node has been committed.
254 This should be the same as if called on an unknown path. */
255 return svn_error_createf(SVN_ERR_WC_PATH_NOT_FOUND, NULL,
256 _("Cannot get the pristine contents of '%s' "
257 "because its delete is already committed"),
258 svn_dirent_local_style(local_abspath,
259 scratch_pool));
260 else if (status == svn_wc__db_status_server_excluded
261 || status == svn_wc__db_status_excluded
262 || status == svn_wc__db_status_incomplete)
263 return svn_error_createf(SVN_ERR_WC_PATH_UNEXPECTED_STATUS, NULL,
264 _("Cannot get the pristine contents of '%s' "
265 "because it has an unexpected status"),
266 svn_dirent_local_style(local_abspath,
267 scratch_pool));
268 if (sha1_checksum)
269 SVN_ERR(svn_wc__db_pristine_read(contents, size, db, local_abspath,
270 sha1_checksum,
271 result_pool, scratch_pool));
272 else
273 *contents = NULL;
274
275 return SVN_NO_ERROR;
276 }
277
278
279 /*** Opening and closing files in the adm area. ***/
280
281 svn_error_t *
svn_wc__open_adm_stream(svn_stream_t ** stream,const char * dir_abspath,const char * fname,apr_pool_t * result_pool,apr_pool_t * scratch_pool)282 svn_wc__open_adm_stream(svn_stream_t **stream,
283 const char *dir_abspath,
284 const char *fname,
285 apr_pool_t *result_pool,
286 apr_pool_t *scratch_pool)
287 {
288 const char *local_abspath;
289
290 SVN_ERR_ASSERT(svn_dirent_is_absolute(dir_abspath));
291
292 local_abspath = svn_wc__adm_child(dir_abspath, fname, scratch_pool);
293 return svn_error_trace(svn_stream_open_readonly(stream, local_abspath,
294 result_pool, scratch_pool));
295 }
296
297
298 /*** Checking for and creating administrative subdirs. ***/
299
300
301 /* */
302 static svn_error_t *
init_adm_tmp_area(const char * path,apr_pool_t * pool)303 init_adm_tmp_area(const char *path, apr_pool_t *pool)
304 {
305 /* SVN_WC__ADM_TMP */
306 SVN_ERR(make_adm_subdir(path, SVN_WC__ADM_TMP, pool));
307
308 return SVN_NO_ERROR;
309 }
310
311
312 /* Set up a new adm area for PATH, with REPOS_* as the repos info, and
313 INITIAL_REV as the starting revision. The entries file starts out
314 marked as 'incomplete. The adm area starts out locked; remember to
315 unlock it when done. */
316 static svn_error_t *
init_adm(svn_wc__db_t * db,const char * local_abspath,const char * repos_relpath,const char * repos_root_url,const char * repos_uuid,svn_revnum_t initial_rev,svn_depth_t depth,apr_pool_t * pool)317 init_adm(svn_wc__db_t *db,
318 const char *local_abspath,
319 const char *repos_relpath,
320 const char *repos_root_url,
321 const char *repos_uuid,
322 svn_revnum_t initial_rev,
323 svn_depth_t depth,
324 apr_pool_t *pool)
325 {
326 /* First, make an empty administrative area. */
327 SVN_ERR(svn_io_dir_make_hidden(svn_wc__adm_child(local_abspath, NULL, pool),
328 APR_OS_DEFAULT, pool));
329
330 /** Make subdirectories. ***/
331
332 /* SVN_WC__ADM_PRISTINE */
333 SVN_ERR(make_adm_subdir(local_abspath, SVN_WC__ADM_PRISTINE, pool));
334
335 /* ### want to add another directory? do a format bump to ensure that
336 ### all existing working copies get the new directories. or maybe
337 ### create-on-demand (more expensive) */
338
339 /** Init the tmp area. ***/
340 SVN_ERR(init_adm_tmp_area(local_abspath, pool));
341
342 /* Create the SDB. */
343 SVN_ERR(svn_wc__db_init(db, local_abspath,
344 repos_relpath, repos_root_url, repos_uuid,
345 initial_rev, depth,
346 pool));
347
348 /* Stamp ENTRIES and FORMAT files for old clients. */
349 SVN_ERR(svn_io_file_create(svn_wc__adm_child(local_abspath,
350 SVN_WC__ADM_ENTRIES,
351 pool),
352 SVN_WC__NON_ENTRIES_STRING,
353 pool));
354 SVN_ERR(svn_io_file_create(svn_wc__adm_child(local_abspath,
355 SVN_WC__ADM_FORMAT,
356 pool),
357 SVN_WC__NON_ENTRIES_STRING,
358 pool));
359
360 return SVN_NO_ERROR;
361 }
362
363 svn_error_t *
svn_wc__internal_ensure_adm(svn_wc__db_t * db,const char * local_abspath,const char * url,const char * repos_root_url,const char * repos_uuid,svn_revnum_t revision,svn_depth_t depth,apr_pool_t * scratch_pool)364 svn_wc__internal_ensure_adm(svn_wc__db_t *db,
365 const char *local_abspath,
366 const char *url,
367 const char *repos_root_url,
368 const char *repos_uuid,
369 svn_revnum_t revision,
370 svn_depth_t depth,
371 apr_pool_t *scratch_pool)
372 {
373 int format;
374 const char *original_repos_relpath;
375 const char *original_root_url;
376 svn_boolean_t is_op_root;
377 const char *repos_relpath = svn_uri_skip_ancestor(repos_root_url, url,
378 scratch_pool);
379 svn_wc__db_status_t status;
380 const char *db_repos_relpath, *db_repos_root_url, *db_repos_uuid;
381 svn_revnum_t db_revision;
382
383 SVN_ERR_ASSERT(svn_dirent_is_absolute(local_abspath));
384 SVN_ERR_ASSERT(url != NULL);
385 SVN_ERR_ASSERT(repos_root_url != NULL);
386 SVN_ERR_ASSERT(repos_uuid != NULL);
387 SVN_ERR_ASSERT(repos_relpath != NULL);
388
389 SVN_ERR(svn_wc__internal_check_wc(&format, db, local_abspath, TRUE,
390 scratch_pool));
391
392 /* Early out: we know we're not dealing with an existing wc, so
393 just create one. */
394 if (format == 0)
395 return svn_error_trace(init_adm(db, local_abspath,
396 repos_relpath, repos_root_url, repos_uuid,
397 revision, depth, scratch_pool));
398
399 SVN_ERR(svn_wc__db_read_info(&status, NULL,
400 &db_revision, &db_repos_relpath,
401 &db_repos_root_url, &db_repos_uuid,
402 NULL, NULL, NULL, NULL, NULL, NULL,
403 &original_repos_relpath, &original_root_url,
404 NULL, NULL, NULL, NULL, NULL, NULL,
405 NULL, &is_op_root, NULL, NULL,
406 NULL, NULL, NULL,
407 db, local_abspath, scratch_pool, scratch_pool));
408
409 /* When the directory exists and is scheduled for deletion or is not-present
410 * do not check the revision or the URL. The revision can be any
411 * arbitrary revision and the URL may differ if the add is
412 * being driven from a merge which will have a different URL. */
413 if (status != svn_wc__db_status_deleted
414 && status != svn_wc__db_status_not_present)
415 {
416 /* ### Should we match copyfrom_revision? */
417 if (db_revision != revision)
418 return
419 svn_error_createf(SVN_ERR_WC_OBSTRUCTED_UPDATE, NULL,
420 _("Revision %ld doesn't match existing "
421 "revision %ld in '%s'"),
422 revision, db_revision, local_abspath);
423
424 if (!db_repos_root_url)
425 {
426 if (status == svn_wc__db_status_added)
427 SVN_ERR(svn_wc__db_scan_addition(NULL, NULL,
428 &db_repos_relpath,
429 &db_repos_root_url,
430 &db_repos_uuid,
431 NULL, NULL, NULL, NULL,
432 db, local_abspath,
433 scratch_pool, scratch_pool));
434 else
435 SVN_ERR(svn_wc__db_base_get_info(NULL, NULL, NULL,
436 &db_repos_relpath,
437 &db_repos_root_url,
438 &db_repos_uuid, NULL, NULL, NULL,
439 NULL, NULL, NULL, NULL, NULL,
440 NULL, NULL,
441 db, local_abspath,
442 scratch_pool, scratch_pool));
443 }
444
445 /* The caller gives us a URL which should match the entry. However,
446 some callers compensate for an old problem in entry->url and pass
447 the copyfrom_url instead. See ^/notes/api-errata/1.7/wc002.txt. As
448 a result, we allow the passed URL to match copyfrom_url if it
449 does not match the entry's primary URL. */
450 if (strcmp(db_repos_uuid, repos_uuid)
451 || strcmp(db_repos_root_url, repos_root_url)
452 || !svn_relpath_skip_ancestor(db_repos_relpath, repos_relpath))
453 {
454 if (!is_op_root /* copy_from was set on op-roots only */
455 || original_root_url == NULL
456 || strcmp(original_root_url, repos_root_url)
457 || strcmp(original_repos_relpath, repos_relpath))
458 return
459 svn_error_createf(SVN_ERR_WC_OBSTRUCTED_UPDATE, NULL,
460 _("URL '%s' (uuid: '%s') doesn't match existing "
461 "URL '%s' (uuid: '%s') in '%s'"),
462 url,
463 db_repos_uuid,
464 svn_path_url_add_component2(db_repos_root_url,
465 db_repos_relpath,
466 scratch_pool),
467 repos_uuid,
468 local_abspath);
469 }
470 }
471
472 return SVN_NO_ERROR;
473 }
474
475 svn_error_t *
svn_wc_ensure_adm4(svn_wc_context_t * wc_ctx,const char * local_abspath,const char * url,const char * repos_root_url,const char * repos_uuid,svn_revnum_t revision,svn_depth_t depth,apr_pool_t * scratch_pool)476 svn_wc_ensure_adm4(svn_wc_context_t *wc_ctx,
477 const char *local_abspath,
478 const char *url,
479 const char *repos_root_url,
480 const char *repos_uuid,
481 svn_revnum_t revision,
482 svn_depth_t depth,
483 apr_pool_t *scratch_pool)
484 {
485 return svn_error_trace(
486 svn_wc__internal_ensure_adm(wc_ctx->db, local_abspath, url, repos_root_url,
487 repos_uuid, revision, depth, scratch_pool));
488 }
489
490 svn_error_t *
svn_wc__adm_destroy(svn_wc__db_t * db,const char * dir_abspath,svn_cancel_func_t cancel_func,void * cancel_baton,apr_pool_t * scratch_pool)491 svn_wc__adm_destroy(svn_wc__db_t *db,
492 const char *dir_abspath,
493 svn_cancel_func_t cancel_func,
494 void *cancel_baton,
495 apr_pool_t *scratch_pool)
496 {
497 svn_boolean_t is_wcroot;
498
499 SVN_ERR_ASSERT(svn_dirent_is_absolute(dir_abspath));
500
501 SVN_ERR(svn_wc__write_check(db, dir_abspath, scratch_pool));
502
503 SVN_ERR(svn_wc__db_is_wcroot(&is_wcroot, db, dir_abspath, scratch_pool));
504
505 /* Well, the coast is clear for blowing away the administrative
506 directory, which also removes remaining locks */
507
508 /* Now close the DB, and we can delete the working copy */
509 if (is_wcroot)
510 {
511 SVN_ERR(svn_wc__db_drop_root(db, dir_abspath, scratch_pool));
512 SVN_ERR(svn_io_remove_dir2(svn_wc__adm_child(dir_abspath, NULL,
513 scratch_pool),
514 FALSE,
515 cancel_func, cancel_baton,
516 scratch_pool));
517 }
518
519 return SVN_NO_ERROR;
520 }
521
522
523 svn_error_t *
svn_wc__adm_cleanup_tmp_area(svn_wc__db_t * db,const char * adm_abspath,apr_pool_t * scratch_pool)524 svn_wc__adm_cleanup_tmp_area(svn_wc__db_t *db,
525 const char *adm_abspath,
526 apr_pool_t *scratch_pool)
527 {
528 const char *tmp_path;
529
530 SVN_ERR_ASSERT(svn_dirent_is_absolute(adm_abspath));
531
532 SVN_ERR(svn_wc__write_check(db, adm_abspath, scratch_pool));
533
534 /* Get the path to the tmp area, and blow it away. */
535 tmp_path = svn_wc__adm_child(adm_abspath, SVN_WC__ADM_TMP, scratch_pool);
536
537 SVN_ERR(svn_io_remove_dir2(tmp_path, TRUE, NULL, NULL, scratch_pool));
538
539 /* Now, rebuild the tmp area. */
540 return svn_error_trace(init_adm_tmp_area(adm_abspath, scratch_pool));
541 }
542
543
544 svn_error_t *
svn_wc__get_tmpdir(const char ** tmpdir_abspath,svn_wc_context_t * wc_ctx,const char * wri_abspath,apr_pool_t * result_pool,apr_pool_t * scratch_pool)545 svn_wc__get_tmpdir(const char **tmpdir_abspath,
546 svn_wc_context_t *wc_ctx,
547 const char *wri_abspath,
548 apr_pool_t *result_pool,
549 apr_pool_t *scratch_pool)
550 {
551 SVN_ERR(svn_wc__db_temp_wcroot_tempdir(tmpdir_abspath,
552 wc_ctx->db, wri_abspath,
553 result_pool, scratch_pool));
554 return SVN_NO_ERROR;
555 }
556