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dis-bench / src /php /php-src /ext /phar /dirstream.c
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/*
+----------------------------------------------------------------------+
| phar:// stream wrapper support |
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Gregory Beaver <cellog@php.net> |
| Marcus Boerger <helly@php.net> |
+----------------------------------------------------------------------+
*/
#define PHAR_DIRSTREAM 1
#include "phar_internal.h"
#include "dirstream.h"
void phar_dostat(phar_archive_data *phar, phar_entry_info *data, php_stream_statbuf *ssb, bool is_dir);
static const php_stream_ops phar_dir_ops = {
phar_dir_write, /* write */
phar_dir_read, /* read */
phar_dir_close, /* close */
phar_dir_flush, /* flush */
"phar dir",
phar_dir_seek, /* seek */
NULL, /* cast */
NULL, /* stat */
NULL, /* set option */
};
/**
* Used for closedir($fp) where $fp is an opendir('phar://...') directory handle
*/
static int phar_dir_close(php_stream *stream, int close_handle) /* {{{ */
{
HashTable *data = (HashTable *)stream->abstract;
if (data) {
zend_hash_destroy(data);
FREE_HASHTABLE(data);
stream->abstract = NULL;
}
return 0;
}
/* }}} */
/**
* Used for seeking on a phar directory handle
*/
static int phar_dir_seek(php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffset) /* {{{ */
{
HashTable *data = (HashTable *)stream->abstract;
if (!data) {
return -1;
}
if (whence == SEEK_END) {
whence = SEEK_SET;
offset = zend_hash_num_elements(data) + offset;
}
if (whence == SEEK_SET) {
zend_hash_internal_pointer_reset(data);
}
if (offset < 0) {
return -1;
} else {
*newoffset = 0;
while (*newoffset < offset && zend_hash_move_forward(data) == SUCCESS) {
++(*newoffset);
}
return 0;
}
}
/* }}} */
/**
* Used for readdir() on an opendir()ed phar directory handle
*/
static ssize_t phar_dir_read(php_stream *stream, char *buf, size_t count) /* {{{ */
{
HashTable *data = (HashTable *)stream->abstract;
zend_string *str_key;
zend_ulong unused;
if (count != sizeof(php_stream_dirent)) {
return -1;
}
if (HASH_KEY_NON_EXISTENT == zend_hash_get_current_key(data, &str_key, &unused)) {
return 0;
}
zend_hash_move_forward(data);
php_stream_dirent *dirent = (php_stream_dirent *) buf;
if (sizeof(dirent->d_name) <= ZSTR_LEN(str_key)) {
return 0;
}
memset(dirent, 0, sizeof(php_stream_dirent));
PHP_STRLCPY(dirent->d_name, ZSTR_VAL(str_key), sizeof(dirent->d_name), ZSTR_LEN(str_key));
return sizeof(php_stream_dirent);
}
/* }}} */
/**
* Dummy: Used for writing to a phar directory (i.e. not used)
*/
static ssize_t phar_dir_write(php_stream *stream, const char *buf, size_t count) /* {{{ */
{
return -1;
}
/* }}} */
/**
* Dummy: Used for flushing writes to a phar directory (i.e. not used)
*/
static int phar_dir_flush(php_stream *stream) /* {{{ */
{
return EOF;
}
/* }}} */
/**
* Used for sorting directories alphabetically
*/
static int phar_compare_dir_name(Bucket *f, Bucket *s) /* {{{ */
{
int result = zend_binary_strcmp(
ZSTR_VAL(f->key), ZSTR_LEN(f->key), ZSTR_VAL(s->key), ZSTR_LEN(s->key));
return ZEND_NORMALIZE_BOOL(result);
}
/* }}} */
/**
* Create a opendir() directory stream handle by iterating over each of the
* files in a phar and retrieving its relative path. From this, construct
* a list of files/directories that are "in" the directory represented by dir
*/
static php_stream *phar_make_dirstream(const char *dir, size_t dirlen, const HashTable *manifest) /* {{{ */
{
HashTable *data;
char *entry;
ALLOC_HASHTABLE(data);
zend_hash_init(data, 64, NULL, NULL, 0);
if ((*dir == '/' && dirlen == 1 && (manifest->nNumOfElements == 0)) || (dirlen >= sizeof(".phar")-1 && !memcmp(dir, ".phar", sizeof(".phar")-1))) {
/* make empty root directory for empty phar */
/* make empty directory for .phar magic directory */
return php_stream_alloc(&phar_dir_ops, data, NULL, "r");
}
zend_string *str_key;
ZEND_HASH_MAP_FOREACH_STR_KEY(manifest, str_key) {
size_t keylen = ZSTR_LEN(str_key);
if (keylen <= dirlen) {
if (keylen == 0 || keylen < dirlen || !strncmp(ZSTR_VAL(str_key), dir, dirlen)) {
continue;
}
}
if (*dir == '/') {
/* root directory */
if (zend_string_starts_with_literal(str_key, ".phar")) {
/* do not add any magic entries to this directory */
continue;
}
const char *has_slash = memchr(ZSTR_VAL(str_key), '/', keylen);
if (has_slash) {
/* the entry has a path separator and is a subdirectory */
keylen = has_slash - ZSTR_VAL(str_key);
}
entry = safe_emalloc(keylen, 1, 1);
memcpy(entry, ZSTR_VAL(str_key), keylen);
entry[keylen] = '\0';
goto PHAR_ADD_ENTRY;
} else {
if (0 != memcmp(ZSTR_VAL(str_key), dir, dirlen)) {
/* entry in directory not found */
continue;
} else {
if (ZSTR_VAL(str_key)[dirlen] != '/') {
continue;
}
}
}
const char *save = ZSTR_VAL(str_key);
save += dirlen + 1; /* seek to just past the path separator */
const char *has_slash = memchr(save, '/', keylen - dirlen - 1);
if (has_slash) {
/* is subdirectory */
save -= dirlen + 1;
entry = safe_emalloc(has_slash - save + dirlen, 1, 1);
memcpy(entry, save + dirlen + 1, has_slash - save - dirlen - 1);
keylen = has_slash - save - dirlen - 1;
entry[keylen] = '\0';
} else {
/* is file */
save -= dirlen + 1;
entry = safe_emalloc(keylen - dirlen, 1, 1);
memcpy(entry, save + dirlen + 1, keylen - dirlen - 1);
entry[keylen - dirlen - 1] = '\0';
keylen = keylen - dirlen - 1;
}
PHAR_ADD_ENTRY:
if (keylen) {
/**
* Add an empty element to avoid duplicates
*
* This is used to get a unique listing of virtual directories within a phar,
* for iterating over opendir()ed phar directories.
*/
zval dummy;
ZVAL_NULL(&dummy);
zend_hash_str_update(data, entry, keylen, &dummy);
}
efree(entry);
} ZEND_HASH_FOREACH_END();
if (FAILURE != zend_hash_has_more_elements(data)) {
zend_hash_sort(data, phar_compare_dir_name, 0);
return php_stream_alloc(&phar_dir_ops, data, NULL, "r");
} else {
return php_stream_alloc(&phar_dir_ops, data, NULL, "r");
}
}
/* }}}*/
/**
* Open a directory handle within a phar archive
*/
php_stream *phar_wrapper_open_dir(php_stream_wrapper *wrapper, const char *path, const char *mode, int options, zend_string **opened_path, php_stream_context *context STREAMS_DC) /* {{{ */
{
php_url *resource = NULL;
char *error;
phar_archive_data *phar;
if ((resource = phar_parse_url(wrapper, path, mode, options)) == NULL) {
php_stream_wrapper_log_error(wrapper, options, "phar url \"%s\" is unknown", path);
return NULL;
}
/* we must have at the very least phar://alias.phar/ */
if (!resource->scheme || !resource->host || !resource->path) {
if (resource->host && !resource->path) {
php_stream_wrapper_log_error(wrapper, options, "phar error: no directory in \"%s\", must have at least phar://%s/ for root directory (always use full path to a new phar)", path, ZSTR_VAL(resource->host));
php_url_free(resource);
return NULL;
}
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options, "phar error: invalid url \"%s\", must have at least phar://%s/", path, path);
return NULL;
}
if (!zend_string_equals_literal_ci(resource->scheme, "phar")) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options, "phar error: not a phar url \"%s\"", path);
return NULL;
}
phar_request_initialize();
if (FAILURE == phar_get_archive(&phar, ZSTR_VAL(resource->host), ZSTR_LEN(resource->host), NULL, 0, &error)) {
if (error) {
php_stream_wrapper_log_error(wrapper, options, "%s", error);
efree(error);
} else {
php_stream_wrapper_log_error(wrapper, options, "phar file \"%s\" is unknown", ZSTR_VAL(resource->host));
}
php_url_free(resource);
return NULL;
}
if (error) {
efree(error);
}
if (zend_string_equals(resource->path, ZSTR_CHAR('/'))) {
/* root directory requested */
php_url_free(resource);
return phar_make_dirstream("/", strlen("/"), &phar->manifest);
}
if (!HT_IS_INITIALIZED(&phar->manifest)) {
php_url_free(resource);
return NULL;
}
const char *internal_file = ZSTR_VAL(resource->path) + 1; /* strip leading "/" */
size_t internal_file_len = ZSTR_LEN(resource->path) - 1;
phar_entry_info *entry = zend_hash_str_find_ptr(&phar->manifest, internal_file, internal_file_len);
php_stream *ret;
if (NULL != entry && !entry->is_dir) {
php_url_free(resource);
return NULL;
} else if (entry && entry->is_dir) {
if (entry->is_mounted) {
ret = php_stream_opendir(entry->tmp, options, context);
php_url_free(resource);
return ret;
}
ret = phar_make_dirstream(internal_file, internal_file_len, &phar->manifest);
php_url_free(resource);
return ret;
} else {
zend_string *str_key;
/* search for directory */
ZEND_HASH_MAP_FOREACH_STR_KEY(&phar->manifest, str_key) {
if (zend_string_starts_with_cstr(str_key, internal_file, internal_file_len)) {
/* directory found */
ret = phar_make_dirstream(internal_file, internal_file_len, &phar->manifest);
php_url_free(resource);
return ret;
}
} ZEND_HASH_FOREACH_END();
}
php_url_free(resource);
return NULL;
}
/* }}} */
/**
* Make a new directory within a phar archive
*/
int phar_wrapper_mkdir(php_stream_wrapper *wrapper, const char *url_from, int mode, int options, php_stream_context *context) /* {{{ */
{
phar_entry_info entry, *e;
phar_archive_data *phar = NULL;
char *error, *arch, *entry2;
size_t arch_len, entry_len;
php_url *resource = NULL;
/* pre-readonly check, we need to know if this is a data phar */
if (FAILURE == phar_split_fname(url_from, strlen(url_from), &arch, &arch_len, &entry2, &entry_len, 2, 2)) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\", no phar archive specified", url_from);
return 0;
}
if (FAILURE == phar_get_archive(&phar, arch, arch_len, NULL, 0, NULL)) {
phar = NULL;
}
efree(arch);
efree(entry2);
if (PHAR_G(readonly) && (!phar || !phar->is_data)) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\", write operations disabled", url_from);
return 0;
}
if ((resource = phar_parse_url(wrapper, url_from, "w", options)) == NULL) {
return 0;
}
/* we must have at the very least phar://alias.phar/internalfile.php */
if (!resource->scheme || !resource->host || !resource->path) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options, "phar error: invalid url \"%s\"", url_from);
return 0;
}
if (!zend_string_equals_literal_ci(resource->scheme, "phar")) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options, "phar error: not a phar stream url \"%s\"", url_from);
return 0;
}
if (FAILURE == phar_get_archive(&phar, ZSTR_VAL(resource->host), ZSTR_LEN(resource->host), NULL, 0, &error)) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\" in phar \"%s\", error retrieving phar information: %s", ZSTR_VAL(resource->path) + 1, ZSTR_VAL(resource->host), error);
efree(error);
php_url_free(resource);
return 0;
}
if ((e = phar_get_entry_info_dir(phar, ZSTR_VAL(resource->path) + 1, ZSTR_LEN(resource->path) - 1, 2, &error, 1))) {
/* directory exists, or is a subdirectory of an existing file */
if (e->is_temp_dir) {
zend_string_efree(e->filename);
efree(e);
}
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\" in phar \"%s\", directory already exists", ZSTR_VAL(resource->path)+1, ZSTR_VAL(resource->host));
php_url_free(resource);
return 0;
}
if (error) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\" in phar \"%s\", %s", ZSTR_VAL(resource->path)+1, ZSTR_VAL(resource->host), error);
efree(error);
php_url_free(resource);
return 0;
}
if (phar_get_entry_info_dir(phar, ZSTR_VAL(resource->path) + 1, ZSTR_LEN(resource->path) - 1, 0, &error, 1)) {
/* entry exists as a file */
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\" in phar \"%s\", file already exists", ZSTR_VAL(resource->path)+1, ZSTR_VAL(resource->host));
php_url_free(resource);
return 0;
}
if (error) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\" in phar \"%s\", %s", ZSTR_VAL(resource->path)+1, ZSTR_VAL(resource->host), error);
efree(error);
php_url_free(resource);
return 0;
}
memset((void *) &entry, 0, sizeof(phar_entry_info));
/* strip leading "/" */
if (phar->is_zip) {
entry.is_zip = 1;
}
entry.filename = zend_string_init(ZSTR_VAL(resource->path) + 1, ZSTR_LEN(resource->path) - 1, false);
if (phar->is_tar) {
entry.is_tar = 1;
entry.tar_type = TAR_DIR;
}
php_url_free(resource);
entry.is_dir = 1;
entry.phar = phar;
entry.is_modified = 1;
entry.is_crc_checked = 1;
entry.flags = PHAR_ENT_PERM_DEF_DIR;
entry.old_flags = PHAR_ENT_PERM_DEF_DIR;
if (NULL == zend_hash_add_mem(&phar->manifest, entry.filename, &entry, sizeof(phar_entry_info))) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\" in phar \"%s\", adding to manifest failed", ZSTR_VAL(entry.filename), phar->fname);
efree(error);
zend_string_efree(entry.filename);
return 0;
}
phar_flush(phar, &error);
if (error) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot create directory \"%s\" in phar \"%s\", %s", ZSTR_VAL(entry.filename), phar->fname, error);
zend_hash_del(&phar->manifest, entry.filename);
efree(error);
return 0;
}
phar_add_virtual_dirs(phar, ZSTR_VAL(entry.filename), ZSTR_LEN(entry.filename));
return 1;
}
/* }}} */
/**
* Remove a directory within a phar archive
*/
int phar_wrapper_rmdir(php_stream_wrapper *wrapper, const char *url, int options, php_stream_context *context) /* {{{ */
{
phar_entry_info *entry;
phar_archive_data *phar = NULL;
char *error, *arch, *entry2;
size_t arch_len, entry_len;
php_url *resource = NULL;
/* pre-readonly check, we need to know if this is a data phar */
if (FAILURE == phar_split_fname(url, strlen(url), &arch, &arch_len, &entry2, &entry_len, 2, 2)) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot remove directory \"%s\", no phar archive specified, or phar archive does not exist", url);
return 0;
}
if (FAILURE == phar_get_archive(&phar, arch, arch_len, NULL, 0, NULL)) {
phar = NULL;
}
efree(arch);
efree(entry2);
if (PHAR_G(readonly) && (!phar || !phar->is_data)) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot rmdir directory \"%s\", write operations disabled", url);
return 0;
}
if ((resource = phar_parse_url(wrapper, url, "w", options)) == NULL) {
return 0;
}
/* we must have at the very least phar://alias.phar/internalfile.php */
if (!resource->scheme || !resource->host || !resource->path) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options, "phar error: invalid url \"%s\"", url);
return 0;
}
if (!zend_string_equals_literal_ci(resource->scheme, "phar")) {
php_url_free(resource);
php_stream_wrapper_log_error(wrapper, options, "phar error: not a phar stream url \"%s\"", url);
return 0;
}
if (FAILURE == phar_get_archive(&phar, ZSTR_VAL(resource->host), ZSTR_LEN(resource->host), NULL, 0, &error)) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot remove directory \"%s\" in phar \"%s\", error retrieving phar information: %s", ZSTR_VAL(resource->path)+1, ZSTR_VAL(resource->host), error);
efree(error);
php_url_free(resource);
return 0;
}
size_t path_len = ZSTR_LEN(resource->path) - 1;
if (!(entry = phar_get_entry_info_dir(phar, ZSTR_VAL(resource->path) + 1, path_len, 2, &error, 1))) {
if (error) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot remove directory \"%s\" in phar \"%s\", %s", ZSTR_VAL(resource->path)+1, ZSTR_VAL(resource->host), error);
efree(error);
} else {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot remove directory \"%s\" in phar \"%s\", directory does not exist", ZSTR_VAL(resource->path)+1, ZSTR_VAL(resource->host));
}
php_url_free(resource);
return 0;
}
if (!entry->is_deleted) {
zend_string *str_key;
ZEND_HASH_MAP_FOREACH_STR_KEY(&phar->manifest, str_key) {
if (
zend_string_starts_with_cstr(str_key, ZSTR_VAL(resource->path)+1, path_len)
&& IS_SLASH(ZSTR_VAL(str_key)[path_len])
) {
php_stream_wrapper_log_error(wrapper, options, "phar error: Directory not empty");
if (entry->is_temp_dir) {
zend_string_efree(entry->filename);
efree(entry);
}
php_url_free(resource);
return 0;
}
} ZEND_HASH_FOREACH_END();
ZEND_HASH_MAP_FOREACH_STR_KEY(&phar->virtual_dirs, str_key) {
ZEND_ASSERT(str_key);
if (
zend_string_starts_with_cstr(str_key, ZSTR_VAL(resource->path)+1, path_len)
&& IS_SLASH(ZSTR_VAL(str_key)[path_len])
) {
php_stream_wrapper_log_error(wrapper, options, "phar error: Directory not empty");
if (entry->is_temp_dir) {
zend_string_efree(entry->filename);
efree(entry);
}
php_url_free(resource);
return 0;
}
} ZEND_HASH_FOREACH_END();
}
if (entry->is_temp_dir) {
zend_hash_str_del(&phar->virtual_dirs, ZSTR_VAL(resource->path)+1, path_len);
zend_string_efree(entry->filename);
efree(entry);
} else {
entry->is_deleted = 1;
entry->is_modified = 1;
phar_flush(phar, &error);
if (error) {
php_stream_wrapper_log_error(wrapper, options, "phar error: cannot remove directory \"%s\" in phar \"%s\", %s", ZSTR_VAL(entry->filename), phar->fname, error);
php_url_free(resource);
efree(error);
return 0;
}
}
php_url_free(resource);
return 1;
}
/* }}} */