/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr_arch_file_io.h"
#include "apr_strings.h"
#include "apr_portable.h"
#if APR_HAVE_SYS_SYSLIMITS_H
#include <sys/syslimits.h>
#endif
#if APR_HAVE_LIMITS_H
#include <limits.h>
#endif
#ifndef NAME_MAX
#define NAME_MAX 255
#endif
static apr_status_t dir_cleanup(void *thedir)
{
apr_dir_t *dir = thedir;
if (closedir(dir->dirstruct) == 0) {
return APR_SUCCESS;
}
else {
return errno;
}
}
#define PATH_SEPARATOR '/'
/* Remove trailing separators that don't affect the meaning of PATH. */
static const char *path_canonicalize (const char *path, apr_pool_t *pool)
{
/* At some point this could eliminate redundant components. For
* now, it just makes sure there is no trailing slash. */
apr_size_t len = strlen (path);
apr_size_t orig_len = len;
while ((len > 0) && (path[len - 1] == PATH_SEPARATOR))
len--;
if (len != orig_len)
return apr_pstrndup (pool, path, len);
else
return path;
}
/* Remove one component off the end of PATH. */
static char *path_remove_last_component (const char *path, apr_pool_t *pool)
{
const char *newpath = path_canonicalize (path, pool);
int i;
for (i = (strlen(newpath) - 1); i >= 0; i--) {
if (path[i] == PATH_SEPARATOR)
break;
}
return apr_pstrndup (pool, path, (i < 0) ? 0 : i);
}
apr_status_t apr_dir_open(apr_dir_t **new, const char *dirname,
apr_pool_t *pool)
{
DIR *dir = opendir(dirname);
if (!dir) {
return errno;
}
(*new) = (apr_dir_t *)apr_palloc(pool, sizeof(apr_dir_t));
(*new)->pool = pool;
(*new)->dirname = apr_pstrdup(pool, dirname);
(*new)->dirstruct = dir;
#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) \
&& !defined(READDIR_IS_THREAD_SAFE)
/* On some platforms (e.g., Linux+GNU libc), d_name[] in struct
* dirent is declared with enough storage for the name. On other
* platforms (e.g., Solaris 8 for Intel), d_name is declared as a
* one-byte array. Note: gcc evaluates this at compile time.
*/
(*new)->entry = apr_pcalloc(pool, sizeof(*(*new)->entry) +
(sizeof((*new)->entry->d_name) > 1
? 0 : NAME_MAX));
#else
(*new)->entry = NULL;
#endif
apr_pool_cleanup_register((*new)->pool, *new, dir_cleanup,
apr_pool_cleanup_null);
return APR_SUCCESS;
}
apr_status_t apr_dir_close(apr_dir_t *thedir)
{
return apr_pool_cleanup_run(thedir->pool, thedir, dir_cleanup);
}
#ifdef DIRENT_TYPE
static apr_filetype_e filetype_from_dirent_type(int type)
{
switch (type) {
case DT_REG:
return APR_REG;
case DT_DIR:
return APR_DIR;
case DT_LNK:
return APR_LNK;
case DT_CHR:
return APR_CHR;
case DT_BLK:
return APR_BLK;
#if defined(DT_FIFO)
case DT_FIFO:
return APR_PIPE;
#endif
#if !defined(BEOS) && defined(DT_SOCK)
case DT_SOCK:
return APR_SOCK;
#endif
default:
return APR_UNKFILE;
}
}
#endif
apr_status_t apr_dir_read(apr_finfo_t *finfo, apr_int32_t wanted,
apr_dir_t *thedir)
{
apr_status_t ret = 0;
#ifdef DIRENT_TYPE
apr_filetype_e type;
#endif
#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) \
&& !defined(READDIR_IS_THREAD_SAFE)
#ifdef APR_USE_READDIR64_R
struct dirent64 *retent;
/* If LFS is enabled and readdir64_r is available, readdir64_r is
* used in preference to readdir_r. This allows directories to be
* read which contain a (64-bit) inode number which doesn't fit
* into the 32-bit apr_ino_t, iff the caller doesn't actually care
* about the inode number (i.e. wanted & APR_FINFO_INODE == 0).
* (such inodes may be seen in some wonky NFS environments)
*
* Similarly, if the d_off field cannot be reprented in a 32-bit
* offset, the libc readdir_r() would barf; using readdir64_r
* bypasses that case entirely since APR does not care about
* d_off. */
ret = readdir64_r(thedir->dirstruct, thedir->entry, &retent);
#else
struct dirent *retent;
ret = readdir_r(thedir->dirstruct, thedir->entry, &retent);
#endif
/* POSIX treats "end of directory" as a non-error case, so ret
* will be zero and retent will be set to NULL in that case. */
if (!ret && retent == NULL) {
ret = APR_ENOENT;
}
/* Solaris is a bit strange, if there are no more entries in the
* directory, it returns EINVAL. Since this is against POSIX, we
* hack around the problem here. EINVAL is possible from other
* readdir implementations, but only if the result buffer is too small.
* since we control the size of that buffer, we should never have
* that problem.
*/
if (ret == EINVAL) {
ret = APR_ENOENT;
}
#else
/* We're about to call a non-thread-safe readdir() that may
possibly set `errno', and the logic below actually cares about
errno after the call. Therefore we need to clear errno first. */
errno = 0;
thedir->entry = readdir(thedir->dirstruct);
if (thedir->entry == NULL) {
/* If NULL was returned, this can NEVER be a success. Can it?! */
if (errno == APR_SUCCESS) {
ret = APR_ENOENT;
}
else
ret = errno;
}
#endif
/* No valid bit flag to test here - do we want one? */
finfo->fname = NULL;
if (ret) {
finfo->valid = 0;
return ret;
}
#ifdef DIRENT_TYPE
type = filetype_from_dirent_type(thedir->entry->DIRENT_TYPE);
if (type != APR_UNKFILE) {
wanted &= ~APR_FINFO_TYPE;
}
#endif
#ifdef DIRENT_INODE
if (thedir->entry->DIRENT_INODE && thedir->entry->DIRENT_INODE != -1) {
#ifdef APR_USE_READDIR64_R
/* If readdir64_r is used, check for the overflow case of trying
* to fit a 64-bit integer into a 32-bit integer. */
if (sizeof(apr_ino_t) >= sizeof(retent->DIRENT_INODE)
|| (apr_ino_t)retent->DIRENT_INODE == retent->DIRENT_INODE) {
wanted &= ~APR_FINFO_INODE;
} else {
/* Prevent the fallback code below from filling in the
* inode if the stat call fails. */
retent->DIRENT_INODE = 0;
}
#else
wanted &= ~APR_FINFO_INODE;
#endif /* APR_USE_READDIR64_R */
}
#endif /* DIRENT_INODE */
wanted &= ~APR_FINFO_NAME;
if (wanted)
{
char fspec[APR_PATH_MAX];
char *end;
end = apr_cpystrn(fspec, thedir->dirname, sizeof fspec);
if (end > fspec && end[-1] != '/' && (end < fspec + APR_PATH_MAX))
*end++ = '/';
apr_cpystrn(end, thedir->entry->d_name,
sizeof fspec - (end - fspec));
ret = apr_stat(finfo, fspec, APR_FINFO_LINK | wanted, thedir->pool);
/* We passed a stack name that will disappear */
finfo->fname = NULL;
}
if (wanted && (ret == APR_SUCCESS || ret == APR_INCOMPLETE)) {
wanted &= ~finfo->valid;
}
else {
/* We don't bail because we fail to stat, when we are only -required-
* to readdir... but the result will be APR_INCOMPLETE
*/
finfo->pool = thedir->pool;
finfo->valid = 0;
#ifdef DIRENT_TYPE
if (type != APR_UNKFILE) {
finfo->filetype = type;
finfo->valid |= APR_FINFO_TYPE;
}
#endif
#ifdef DIRENT_INODE
if (thedir->entry->DIRENT_INODE && thedir->entry->DIRENT_INODE != -1) {
finfo->inode = thedir->entry->DIRENT_INODE;
finfo->valid |= APR_FINFO_INODE;
}
#endif
}
finfo->name = apr_pstrdup(thedir->pool, thedir->entry->d_name);
finfo->valid |= APR_FINFO_NAME;
if (wanted)
return APR_INCOMPLETE;
return APR_SUCCESS;
}
apr_status_t apr_dir_rewind(apr_dir_t *thedir)
{
rewinddir(thedir->dirstruct);
return APR_SUCCESS;
}
apr_status_t apr_dir_make(const char *path, apr_fileperms_t perm,
apr_pool_t *pool)
{
mode_t mode = apr_unix_perms2mode(perm);
if (mkdir(path, mode) == 0) {
return APR_SUCCESS;
}
else {
return errno;
}
}
apr_status_t apr_dir_make_recursive(const char *path, apr_fileperms_t perm,
apr_pool_t *pool)
{
apr_status_t apr_err = 0;
apr_err = apr_dir_make (path, perm, pool); /* Try to make PATH right out */
if (apr_err == ENOENT) { /* Missing an intermediate dir */
char *dir;
dir = path_remove_last_component(path, pool);
/* If there is no path left, give up. */
if (dir[0] == '\0') {
return apr_err;
}
apr_err = apr_dir_make_recursive(dir, perm, pool);
if (!apr_err)
apr_err = apr_dir_make (path, perm, pool);
}
/*
* It's OK if PATH exists. Timing issues can lead to the second
* apr_dir_make being called on existing dir, therefore this check
* has to come last.
*/
if (APR_STATUS_IS_EEXIST(apr_err))
return APR_SUCCESS;
return apr_err;
}
apr_status_t apr_dir_remove(const char *path, apr_pool_t *pool)
{
if (rmdir(path) == 0) {
return APR_SUCCESS;
}
else {
return errno;
}
}
apr_status_t apr_os_dir_get(apr_os_dir_t **thedir, apr_dir_t *dir)
{
if (dir == NULL) {
return APR_ENODIR;
}
*thedir = dir->dirstruct;
return APR_SUCCESS;
}
apr_status_t apr_os_dir_put(apr_dir_t **dir, apr_os_dir_t *thedir,
apr_pool_t *pool)
{
if ((*dir) == NULL) {
(*dir) = (apr_dir_t *)apr_pcalloc(pool, sizeof(apr_dir_t));
(*dir)->pool = pool;
}
(*dir)->dirstruct = thedir;
return APR_SUCCESS;
}