1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include "apr_arch_file_io.h"
18 #include "apr_strings.h"
19 #include "apr_portable.h"
20 #if APR_HAVE_SYS_SYSLIMITS_H
21 #include <sys/syslimits.h>
31 static apr_status_t dir_cleanup(void *thedir)
33 apr_dir_t *dir = thedir;
34 if (closedir(dir->dirstruct) == 0) {
42 #define PATH_SEPARATOR '/'
44 /* Remove trailing separators that don't affect the meaning of PATH. */
45 static const char *path_canonicalize (const char *path, apr_pool_t *pool)
47 /* At some point this could eliminate redundant components. For
48 * now, it just makes sure there is no trailing slash. */
49 apr_size_t len = strlen (path);
50 apr_size_t orig_len = len;
52 while ((len > 0) && (path[len - 1] == PATH_SEPARATOR))
56 return apr_pstrndup (pool, path, len);
61 /* Remove one component off the end of PATH. */
62 static char *path_remove_last_component (const char *path, apr_pool_t *pool)
64 const char *newpath = path_canonicalize (path, pool);
67 for (i = (strlen(newpath) - 1); i >= 0; i--) {
68 if (path[i] == PATH_SEPARATOR)
72 return apr_pstrndup (pool, path, (i < 0) ? 0 : i);
75 apr_status_t apr_dir_open(apr_dir_t **new, const char *dirname,
78 DIR *dir = opendir(dirname);
84 (*new) = (apr_dir_t *)apr_palloc(pool, sizeof(apr_dir_t));
87 (*new)->dirname = apr_pstrdup(pool, dirname);
88 (*new)->dirstruct = dir;
90 #if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) \
91 && !defined(READDIR_IS_THREAD_SAFE)
92 /* On some platforms (e.g., Linux+GNU libc), d_name[] in struct
93 * dirent is declared with enough storage for the name. On other
94 * platforms (e.g., Solaris 8 for Intel), d_name is declared as a
95 * one-byte array. Note: gcc evaluates this at compile time.
97 (*new)->entry = apr_pcalloc(pool, sizeof(*(*new)->entry) +
98 (sizeof((*new)->entry->d_name) > 1
101 (*new)->entry = NULL;
104 apr_pool_cleanup_register((*new)->pool, *new, dir_cleanup,
105 apr_pool_cleanup_null);
109 apr_status_t apr_dir_close(apr_dir_t *thedir)
111 return apr_pool_cleanup_run(thedir->pool, thedir, dir_cleanup);
115 static apr_filetype_e filetype_from_dirent_type(int type)
132 #if !defined(BEOS) && defined(DT_SOCK)
142 apr_status_t apr_dir_read(apr_finfo_t *finfo, apr_int32_t wanted,
145 apr_status_t ret = 0;
149 #if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) \
150 && !defined(READDIR_IS_THREAD_SAFE)
151 #ifdef APR_USE_READDIR64_R
152 struct dirent64 *retent;
154 /* If LFS is enabled and readdir64_r is available, readdir64_r is
155 * used in preference to readdir_r. This allows directories to be
156 * read which contain a (64-bit) inode number which doesn't fit
157 * into the 32-bit apr_ino_t, iff the caller doesn't actually care
158 * about the inode number (i.e. wanted & APR_FINFO_INODE == 0).
159 * (such inodes may be seen in some wonky NFS environments)
161 * Similarly, if the d_off field cannot be reprented in a 32-bit
162 * offset, the libc readdir_r() would barf; using readdir64_r
163 * bypasses that case entirely since APR does not care about
166 ret = readdir64_r(thedir->dirstruct, thedir->entry, &retent);
169 struct dirent *retent;
171 ret = readdir_r(thedir->dirstruct, thedir->entry, &retent);
174 /* POSIX treats "end of directory" as a non-error case, so ret
175 * will be zero and retent will be set to NULL in that case. */
176 if (!ret && retent == NULL) {
180 /* Solaris is a bit strange, if there are no more entries in the
181 * directory, it returns EINVAL. Since this is against POSIX, we
182 * hack around the problem here. EINVAL is possible from other
183 * readdir implementations, but only if the result buffer is too small.
184 * since we control the size of that buffer, we should never have
191 /* We're about to call a non-thread-safe readdir() that may
192 possibly set `errno', and the logic below actually cares about
193 errno after the call. Therefore we need to clear errno first. */
195 thedir->entry = readdir(thedir->dirstruct);
196 if (thedir->entry == NULL) {
197 /* If NULL was returned, this can NEVER be a success. Can it?! */
198 if (errno == APR_SUCCESS) {
206 /* No valid bit flag to test here - do we want one? */
215 type = filetype_from_dirent_type(thedir->entry->DIRENT_TYPE);
216 if (type != APR_UNKFILE) {
217 wanted &= ~APR_FINFO_TYPE;
221 if (thedir->entry->DIRENT_INODE && thedir->entry->DIRENT_INODE != -1) {
222 #ifdef APR_USE_READDIR64_R
223 /* If readdir64_r is used, check for the overflow case of trying
224 * to fit a 64-bit integer into a 32-bit integer. */
225 if (sizeof(apr_ino_t) >= sizeof(retent->DIRENT_INODE)
226 || (apr_ino_t)retent->DIRENT_INODE == retent->DIRENT_INODE) {
227 wanted &= ~APR_FINFO_INODE;
229 /* Prevent the fallback code below from filling in the
230 * inode if the stat call fails. */
231 retent->DIRENT_INODE = 0;
234 wanted &= ~APR_FINFO_INODE;
235 #endif /* APR_USE_READDIR64_R */
237 #endif /* DIRENT_INODE */
239 wanted &= ~APR_FINFO_NAME;
243 char fspec[APR_PATH_MAX];
246 end = apr_cpystrn(fspec, thedir->dirname, sizeof fspec);
248 if (end > fspec && end[-1] != '/' && (end < fspec + APR_PATH_MAX))
251 apr_cpystrn(end, thedir->entry->d_name,
252 sizeof fspec - (end - fspec));
254 ret = apr_stat(finfo, fspec, APR_FINFO_LINK | wanted, thedir->pool);
255 /* We passed a stack name that will disappear */
259 if (wanted && (ret == APR_SUCCESS || ret == APR_INCOMPLETE)) {
260 wanted &= ~finfo->valid;
263 /* We don't bail because we fail to stat, when we are only -required-
264 * to readdir... but the result will be APR_INCOMPLETE
266 finfo->pool = thedir->pool;
269 if (type != APR_UNKFILE) {
270 finfo->filetype = type;
271 finfo->valid |= APR_FINFO_TYPE;
275 if (thedir->entry->DIRENT_INODE && thedir->entry->DIRENT_INODE != -1) {
276 finfo->inode = thedir->entry->DIRENT_INODE;
277 finfo->valid |= APR_FINFO_INODE;
282 finfo->name = apr_pstrdup(thedir->pool, thedir->entry->d_name);
283 finfo->valid |= APR_FINFO_NAME;
286 return APR_INCOMPLETE;
291 apr_status_t apr_dir_rewind(apr_dir_t *thedir)
293 rewinddir(thedir->dirstruct);
297 apr_status_t apr_dir_make(const char *path, apr_fileperms_t perm,
300 mode_t mode = apr_unix_perms2mode(perm);
302 if (mkdir(path, mode) == 0) {
310 apr_status_t apr_dir_make_recursive(const char *path, apr_fileperms_t perm,
313 apr_status_t apr_err = 0;
315 apr_err = apr_dir_make (path, perm, pool); /* Try to make PATH right out */
317 if (apr_err == ENOENT) { /* Missing an intermediate dir */
320 dir = path_remove_last_component(path, pool);
321 /* If there is no path left, give up. */
322 if (dir[0] == '\0') {
326 apr_err = apr_dir_make_recursive(dir, perm, pool);
329 apr_err = apr_dir_make (path, perm, pool);
333 * It's OK if PATH exists. Timing issues can lead to the second
334 * apr_dir_make being called on existing dir, therefore this check
337 if (APR_STATUS_IS_EEXIST(apr_err))
343 apr_status_t apr_dir_remove(const char *path, apr_pool_t *pool)
345 if (rmdir(path) == 0) {
353 apr_status_t apr_os_dir_get(apr_os_dir_t **thedir, apr_dir_t *dir)
358 *thedir = dir->dirstruct;
362 apr_status_t apr_os_dir_put(apr_dir_t **dir, apr_os_dir_t *thedir,
365 if ((*dir) == NULL) {
366 (*dir) = (apr_dir_t *)apr_pcalloc(pool, sizeof(apr_dir_t));
369 (*dir)->dirstruct = thedir;