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userspace.c
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/*
+----------------------------------------------------------------------+
| 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: Wez Furlong <wez@thebrainroom.com> |
| Sara Golemon <pollita@php.net> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "php_globals.h"
#include "ext/standard/file.h"
#include "ext/standard/flock_compat.h"
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include <stddef.h>
#if HAVE_UTIME
# ifdef PHP_WIN32
# include <sys/utime.h>
# else
# include <utime.h>
# endif
#endif
#include "userspace_arginfo.h"
static int le_protocols;
struct php_user_stream_wrapper {
php_stream_wrapper wrapper;
char * protoname;
zend_class_entry *ce;
zend_resource *resource;
};
static php_stream *user_wrapper_opener(php_stream_wrapper *wrapper, const char *filename, const char *mode, int options, zend_string **opened_path, php_stream_context *context STREAMS_DC);
static int user_wrapper_close(php_stream_wrapper *wrapper, php_stream *stream);
static int user_wrapper_stat_url(php_stream_wrapper *wrapper, const char *url, int flags, php_stream_statbuf *ssb, php_stream_context *context);
static int user_wrapper_unlink(php_stream_wrapper *wrapper, const char *url, int options, php_stream_context *context);
static int user_wrapper_rename(php_stream_wrapper *wrapper, const char *url_from, const char *url_to, int options, php_stream_context *context);
static int user_wrapper_mkdir(php_stream_wrapper *wrapper, const char *url, int mode, int options, php_stream_context *context);
static int user_wrapper_rmdir(php_stream_wrapper *wrapper, const char *url, int options, php_stream_context *context);
static int user_wrapper_metadata(php_stream_wrapper *wrapper, const char *url, int option, void *value, php_stream_context *context);
static php_stream *user_wrapper_opendir(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, zend_string **opened_path, php_stream_context *context STREAMS_DC);
static const php_stream_wrapper_ops user_stream_wops = {
user_wrapper_opener,
user_wrapper_close,
NULL, /* stat - the streams themselves know how */
user_wrapper_stat_url,
user_wrapper_opendir,
"user-space",
user_wrapper_unlink,
user_wrapper_rename,
user_wrapper_mkdir,
user_wrapper_rmdir,
user_wrapper_metadata
};
static void stream_wrapper_dtor(zend_resource *rsrc)
{
struct php_user_stream_wrapper * uwrap = (struct php_user_stream_wrapper*)rsrc->ptr;
efree(uwrap->protoname);
efree(uwrap);
}
PHP_MINIT_FUNCTION(user_streams)
{
le_protocols = zend_register_list_destructors_ex(stream_wrapper_dtor, NULL, "stream factory", 0);
if (le_protocols == FAILURE)
return FAILURE;
register_userspace_symbols(module_number);
return SUCCESS;
}
struct _php_userstream_data {
struct php_user_stream_wrapper * wrapper;
zval object;
};
typedef struct _php_userstream_data php_userstream_data_t;
/* names of methods */
#define USERSTREAM_OPEN "stream_open"
#define USERSTREAM_CLOSE "stream_close"
#define USERSTREAM_READ "stream_read"
#define USERSTREAM_WRITE "stream_write"
#define USERSTREAM_FLUSH "stream_flush"
#define USERSTREAM_SEEK "stream_seek"
#define USERSTREAM_TELL "stream_tell"
#define USERSTREAM_EOF "stream_eof"
#define USERSTREAM_STAT "stream_stat"
#define USERSTREAM_STATURL "url_stat"
#define USERSTREAM_UNLINK "unlink"
#define USERSTREAM_RENAME "rename"
#define USERSTREAM_MKDIR "mkdir"
#define USERSTREAM_RMDIR "rmdir"
#define USERSTREAM_DIR_OPEN "dir_opendir"
#define USERSTREAM_DIR_READ "dir_readdir"
#define USERSTREAM_DIR_REWIND "dir_rewinddir"
#define USERSTREAM_DIR_CLOSE "dir_closedir"
#define USERSTREAM_LOCK "stream_lock"
#define USERSTREAM_CAST "stream_cast"
#define USERSTREAM_SET_OPTION "stream_set_option"
#define USERSTREAM_TRUNCATE "stream_truncate"
#define USERSTREAM_METADATA "stream_metadata"
/* {{{ class should have methods like these:
function stream_open($path, $mode, $options, &$opened_path)
{
return true/false;
}
function stream_read($count)
{
return false on error;
else return string;
}
function stream_write($data)
{
return false on error;
else return count written;
}
function stream_close()
{
}
function stream_flush()
{
return true/false;
}
function stream_seek($offset, $whence)
{
return true/false;
}
function stream_tell()
{
return (int)$position;
}
function stream_eof()
{
return true/false;
}
function stream_stat()
{
return array( just like that returned by fstat() );
}
function stream_cast($castas)
{
if ($castas == STREAM_CAST_FOR_SELECT) {
return $this->underlying_stream;
}
return false;
}
function stream_set_option($option, $arg1, $arg2)
{
switch($option) {
case STREAM_OPTION_BLOCKING:
$blocking = $arg1;
...
case STREAM_OPTION_READ_TIMEOUT:
$sec = $arg1;
$usec = $arg2;
...
case STREAM_OPTION_WRITE_BUFFER:
$mode = $arg1;
$size = $arg2;
...
default:
return false;
}
}
function url_stat(string $url, int $flags)
{
return array( just like that returned by stat() );
}
function unlink(string $url)
{
return true / false;
}
function rename(string $from, string $to)
{
return true / false;
}
function mkdir($dir, $mode, $options)
{
return true / false;
}
function rmdir($dir, $options)
{
return true / false;
}
function dir_opendir(string $url, int $options)
{
return true / false;
}
function dir_readdir()
{
return string next filename in dir ;
}
function dir_closedir()
{
release dir related resources;
}
function dir_rewinddir()
{
reset to start of dir list;
}
function stream_lock($operation)
{
return true / false;
}
function stream_truncate($new_size)
{
return true / false;
}
}}} **/
static zend_result call_method_if_exists(
zval *object, zval *method_name, zval *retval, uint32_t param_count, zval *params)
{
return zend_call_method_if_exists(
Z_OBJ_P(object), Z_STR_P(method_name), retval, param_count, params);
}
static void user_stream_create_object(struct php_user_stream_wrapper *uwrap, php_stream_context *context, zval *object)
{
if (uwrap->ce->ce_flags & (ZEND_ACC_INTERFACE|ZEND_ACC_TRAIT|ZEND_ACC_IMPLICIT_ABSTRACT_CLASS|ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) {
ZVAL_UNDEF(object);
return;
}
/* create an instance of our class */
if (object_init_ex(object, uwrap->ce) == FAILURE) {
ZVAL_UNDEF(object);
return;
}
if (context) {
GC_ADDREF(context->res);
add_property_resource(object, "context", context->res);
} else {
add_property_null(object, "context");
}
if (EG(exception) != NULL) {
zval_ptr_dtor(object);
ZVAL_UNDEF(object);
return;
}
if (uwrap->ce->constructor) {
zend_call_known_instance_method_with_0_params(
uwrap->ce->constructor, Z_OBJ_P(object), NULL);
}
}
static php_stream *user_wrapper_opener(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, zend_string **opened_path, php_stream_context *context STREAMS_DC)
{
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper*)wrapper->abstract;
php_userstream_data_t *us;
zval zretval, zfuncname;
zval args[4];
int call_result;
php_stream *stream = NULL;
bool old_in_user_include;
/* Try to catch bad usage without preventing flexibility */
if (FG(user_stream_current_filename) != NULL && strcmp(filename, FG(user_stream_current_filename)) == 0) {
php_stream_wrapper_log_error(wrapper, options, "infinite recursion prevented");
return NULL;
}
FG(user_stream_current_filename) = filename;
/* if the user stream was registered as local and we are in include context,
we add allow_url_include restrictions to allow_url_fopen ones */
/* we need only is_url == 0 here since if is_url == 1 and remote wrappers
were restricted we wouldn't get here */
old_in_user_include = PG(in_user_include);
if(uwrap->wrapper.is_url == 0 &&
(options & STREAM_OPEN_FOR_INCLUDE) &&
!PG(allow_url_include)) {
PG(in_user_include) = 1;
}
us = emalloc(sizeof(*us));
us->wrapper = uwrap;
/* call_method_if_exists() may unregister the stream wrapper. Hold on to it. */
GC_ADDREF(us->wrapper->resource);
user_stream_create_object(uwrap, context, &us->object);
if (Z_TYPE(us->object) == IS_UNDEF) {
FG(user_stream_current_filename) = NULL;
PG(in_user_include) = old_in_user_include;
efree(us);
return NULL;
}
/* call it's stream_open method - set up params first */
ZVAL_STRING(&args[0], filename);
ZVAL_STRING(&args[1], mode);
ZVAL_LONG(&args[2], options);
ZVAL_NEW_REF(&args[3], &EG(uninitialized_zval));
ZVAL_STRING(&zfuncname, USERSTREAM_OPEN);
zend_try {
call_result = call_method_if_exists(&us->object, &zfuncname, &zretval, 4, args);
} zend_catch {
FG(user_stream_current_filename) = NULL;
zend_bailout();
} zend_end_try();
if (call_result == SUCCESS && Z_TYPE(zretval) != IS_UNDEF && zval_is_true(&zretval)) {
/* the stream is now open! */
stream = php_stream_alloc_rel(&php_stream_userspace_ops, us, 0, mode);
/* if the opened path is set, copy it out */
if (Z_ISREF(args[3]) && Z_TYPE_P(Z_REFVAL(args[3])) == IS_STRING && opened_path) {
*opened_path = zend_string_copy(Z_STR_P(Z_REFVAL(args[3])));
}
/* set wrapper data to be a reference to our object */
ZVAL_COPY(&stream->wrapperdata, &us->object);
} else {
php_stream_wrapper_log_error(wrapper, options, "\"%s::" USERSTREAM_OPEN "\" call failed",
ZSTR_VAL(us->wrapper->ce->name));
}
/* destroy everything else */
if (stream == NULL) {
zval_ptr_dtor(&us->object);
ZVAL_UNDEF(&us->object);
zend_list_delete(us->wrapper->resource);
efree(us);
}
zval_ptr_dtor(&zretval);
zval_ptr_dtor(&zfuncname);
zval_ptr_dtor(&args[3]);
zval_ptr_dtor(&args[2]);
zval_ptr_dtor(&args[1]);
zval_ptr_dtor(&args[0]);
FG(user_stream_current_filename) = NULL;
PG(in_user_include) = old_in_user_include;
return stream;
}
static int user_wrapper_close(php_stream_wrapper *wrapper, php_stream *stream)
{
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper*)wrapper->abstract;
zend_list_delete(uwrap->resource);
// FIXME: Unused?
return 0;
}
static php_stream *user_wrapper_opendir(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, zend_string **opened_path, php_stream_context *context STREAMS_DC)
{
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper*)wrapper->abstract;
php_userstream_data_t *us;
zval zretval, zfuncname;
zval args[2];
int call_result;
php_stream *stream = NULL;
/* Try to catch bad usage without preventing flexibility */
if (FG(user_stream_current_filename) != NULL && strcmp(filename, FG(user_stream_current_filename)) == 0) {
php_stream_wrapper_log_error(wrapper, options, "infinite recursion prevented");
return NULL;
}
FG(user_stream_current_filename) = filename;
us = emalloc(sizeof(*us));
us->wrapper = uwrap;
/* call_method_if_exists() may unregister the stream wrapper. Hold on to it. */
GC_ADDREF(us->wrapper->resource);
user_stream_create_object(uwrap, context, &us->object);
if (Z_TYPE(us->object) == IS_UNDEF) {
FG(user_stream_current_filename) = NULL;
efree(us);
return NULL;
}
/* call it's dir_open method - set up params first */
ZVAL_STRING(&args[0], filename);
ZVAL_LONG(&args[1], options);
ZVAL_STRING(&zfuncname, USERSTREAM_DIR_OPEN);
call_result = call_method_if_exists(&us->object, &zfuncname, &zretval, 2, args);
if (call_result == SUCCESS && Z_TYPE(zretval) != IS_UNDEF && zval_is_true(&zretval)) {
/* the stream is now open! */
stream = php_stream_alloc_rel(&php_stream_userspace_dir_ops, us, 0, mode);
/* set wrapper data to be a reference to our object */
ZVAL_COPY(&stream->wrapperdata, &us->object);
} else {
php_stream_wrapper_log_error(wrapper, options, "\"%s::" USERSTREAM_DIR_OPEN "\" call failed",
ZSTR_VAL(us->wrapper->ce->name));
}
/* destroy everything else */
if (stream == NULL) {
zval_ptr_dtor(&us->object);
ZVAL_UNDEF(&us->object);
zend_list_delete(us->wrapper->resource);
efree(us);
}
zval_ptr_dtor(&zretval);
zval_ptr_dtor(&zfuncname);
zval_ptr_dtor(&args[1]);
zval_ptr_dtor(&args[0]);
FG(user_stream_current_filename) = NULL;
return stream;
}
/* {{{ Registers a custom URL protocol handler class */
PHP_FUNCTION(stream_wrapper_register)
{
zend_string *protocol;
struct php_user_stream_wrapper *uwrap;
zend_class_entry *ce = NULL;
zend_resource *rsrc;
zend_long flags = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "SC|l", &protocol, &ce, &flags) == FAILURE) {
RETURN_THROWS();
}
uwrap = (struct php_user_stream_wrapper *)ecalloc(1, sizeof(*uwrap));
uwrap->ce = ce;
uwrap->protoname = estrndup(ZSTR_VAL(protocol), ZSTR_LEN(protocol));
uwrap->wrapper.wops = &user_stream_wops;
uwrap->wrapper.abstract = uwrap;
uwrap->wrapper.is_url = ((flags & PHP_STREAM_IS_URL) != 0);
rsrc = zend_register_resource(uwrap, le_protocols);
if (php_register_url_stream_wrapper_volatile(protocol, &uwrap->wrapper) == SUCCESS) {
uwrap->resource = rsrc;
RETURN_TRUE;
}
/* We failed. But why? */
if (zend_hash_exists(php_stream_get_url_stream_wrappers_hash(), protocol)) {
php_error_docref(NULL, E_WARNING, "Protocol %s:// is already defined.", ZSTR_VAL(protocol));
} else {
/* Hash doesn't exist so it must have been an invalid protocol scheme */
php_error_docref(NULL, E_WARNING, "Invalid protocol scheme specified. Unable to register wrapper class %s to %s://", ZSTR_VAL(uwrap->ce->name), ZSTR_VAL(protocol));
}
zend_list_delete(rsrc);
RETURN_FALSE;
}
/* }}} */
/* {{{ Unregister a wrapper for the life of the current request. */
PHP_FUNCTION(stream_wrapper_unregister)
{
zend_string *protocol;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &protocol) == FAILURE) {
RETURN_THROWS();
}
php_stream_wrapper *wrapper = zend_hash_find_ptr(php_stream_get_url_stream_wrappers_hash(), protocol);
if (php_unregister_url_stream_wrapper_volatile(protocol) == FAILURE) {
/* We failed */
php_error_docref(NULL, E_WARNING, "Unable to unregister protocol %s://", ZSTR_VAL(protocol));
RETURN_FALSE;
}
ZEND_ASSERT(wrapper != NULL);
if (wrapper->wops == &user_stream_wops) {
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper *)wrapper;
// uwrap will be released by resource destructor
zend_list_delete(uwrap->resource);
}
RETURN_TRUE;
}
/* }}} */
/* {{{ Restore the original protocol handler, overriding if necessary */
PHP_FUNCTION(stream_wrapper_restore)
{
zend_string *protocol;
php_stream_wrapper *wrapper;
HashTable *global_wrapper_hash, *wrapper_hash;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &protocol) == FAILURE) {
RETURN_THROWS();
}
global_wrapper_hash = php_stream_get_url_stream_wrappers_hash_global();
if ((wrapper = zend_hash_find_ptr(global_wrapper_hash, protocol)) == NULL) {
php_error_docref(NULL, E_WARNING, "%s:// never existed, nothing to restore", ZSTR_VAL(protocol));
RETURN_FALSE;
}
wrapper_hash = php_stream_get_url_stream_wrappers_hash();
if (wrapper_hash == global_wrapper_hash || zend_hash_find_ptr(wrapper_hash, protocol) == wrapper) {
php_error_docref(NULL, E_NOTICE, "%s:// was never changed, nothing to restore", ZSTR_VAL(protocol));
RETURN_TRUE;
}
/* A failure here could be okay given that the protocol might have been merely unregistered */
php_unregister_url_stream_wrapper_volatile(protocol);
if (php_register_url_stream_wrapper_volatile(protocol, wrapper) == FAILURE) {
php_error_docref(NULL, E_WARNING, "Unable to restore original %s:// wrapper", ZSTR_VAL(protocol));
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
static ssize_t php_userstreamop_write(php_stream *stream, const char *buf, size_t count)
{
zval func_name;
zval retval;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
zval args[1];
ssize_t didwrite;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_WRITE, sizeof(USERSTREAM_WRITE)-1);
ZVAL_STRINGL(&args[0], (char*)buf, count);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 1, args);
zval_ptr_dtor(&args[0]);
zval_ptr_dtor(&func_name);
if (EG(exception)) {
return -1;
}
if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF) {
if (Z_TYPE(retval) == IS_FALSE) {
didwrite = -1;
} else {
convert_to_long(&retval);
didwrite = Z_LVAL(retval);
}
} else {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_WRITE " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
didwrite = -1;
}
/* don't allow strange buffer overruns due to bogus return */
if (didwrite > 0 && didwrite > count) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_WRITE " wrote " ZEND_LONG_FMT " bytes more data than requested (" ZEND_LONG_FMT " written, " ZEND_LONG_FMT " max)",
ZSTR_VAL(us->wrapper->ce->name),
(zend_long)(didwrite - count), (zend_long)didwrite, (zend_long)count);
didwrite = count;
}
zval_ptr_dtor(&retval);
return didwrite;
}
static ssize_t php_userstreamop_read(php_stream *stream, char *buf, size_t count)
{
zval func_name;
zval retval;
zval args[1];
int call_result;
size_t didread = 0;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_READ, sizeof(USERSTREAM_READ)-1);
ZVAL_LONG(&args[0], count);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 1, args);
zval_ptr_dtor(&args[0]);
zval_ptr_dtor(&func_name);
if (EG(exception)) {
return -1;
}
if (call_result == FAILURE) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_READ " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
return -1;
}
if (Z_TYPE(retval) == IS_FALSE) {
return -1;
}
if (!try_convert_to_string(&retval)) {
zval_ptr_dtor(&retval);
return -1;
}
didread = Z_STRLEN(retval);
if (didread > 0) {
if (didread > count) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_READ " - read " ZEND_LONG_FMT " bytes more data than requested (" ZEND_LONG_FMT " read, " ZEND_LONG_FMT " max) - excess data will be lost",
ZSTR_VAL(us->wrapper->ce->name), (zend_long)(didread - count), (zend_long)didread, (zend_long)count);
didread = count;
}
memcpy(buf, Z_STRVAL(retval), didread);
}
zval_ptr_dtor(&retval);
ZVAL_UNDEF(&retval);
/* since the user stream has no way of setting the eof flag directly, we need to ask it if we hit eof */
ZVAL_STRINGL(&func_name, USERSTREAM_EOF, sizeof(USERSTREAM_EOF)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
zval_ptr_dtor(&func_name);
if (EG(exception)) {
stream->eof = 1;
return -1;
}
if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF && zval_is_true(&retval)) {
stream->eof = 1;
} else if (call_result == FAILURE) {
php_error_docref(NULL, E_WARNING,
"%s::" USERSTREAM_EOF " is not implemented! Assuming EOF",
ZSTR_VAL(us->wrapper->ce->name));
stream->eof = 1;
}
zval_ptr_dtor(&retval);
return didread;
}
static int php_userstreamop_close(php_stream *stream, int close_handle)
{
zval func_name;
zval retval;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_CLOSE, sizeof(USERSTREAM_CLOSE)-1);
call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
zval_ptr_dtor(&us->object);
ZVAL_UNDEF(&us->object);
efree(us);
return 0;
}
static int php_userstreamop_flush(php_stream *stream)
{
zval func_name;
zval retval;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_FLUSH, sizeof(USERSTREAM_FLUSH)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF && zval_is_true(&retval))
call_result = 0;
else
call_result = -1;
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
return call_result;
}
static int php_userstreamop_seek(php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffs)
{
zval func_name;
zval retval;
int call_result, ret;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
zval args[2];
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_SEEK, sizeof(USERSTREAM_SEEK)-1);
ZVAL_LONG(&args[0], offset);
ZVAL_LONG(&args[1], whence);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 2, args);
zval_ptr_dtor(&args[0]);
zval_ptr_dtor(&args[1]);
zval_ptr_dtor(&func_name);
if (call_result == FAILURE) {
/* stream_seek is not implemented, so disable seeks for this stream */
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
/* there should be no retval to clean up */
zval_ptr_dtor(&retval);
return -1;
} else if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF && zval_is_true(&retval)) {
ret = 0;
} else {
ret = -1;
}
zval_ptr_dtor(&retval);
ZVAL_UNDEF(&retval);
if (ret) {
return ret;
}
/* now determine where we are */
ZVAL_STRINGL(&func_name, USERSTREAM_TELL, sizeof(USERSTREAM_TELL)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
if (call_result == SUCCESS && Z_TYPE(retval) == IS_LONG) {
*newoffs = Z_LVAL(retval);
ret = 0;
} else if (call_result == FAILURE) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_TELL " is not implemented!", ZSTR_VAL(us->wrapper->ce->name));
ret = -1;
} else {
ret = -1;
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
return ret;
}
/* parse the return value from one of the stat functions and store the
* relevant fields into the statbuf provided */
static int statbuf_from_array(zval *array, php_stream_statbuf *ssb)
{
zval *elem;
#define STAT_PROP_ENTRY_EX(name, name2) \
if (NULL != (elem = zend_hash_str_find(Z_ARRVAL_P(array), #name, sizeof(#name)-1))) { \
ssb->sb.st_##name2 = zval_get_long(elem); \
}
#define STAT_PROP_ENTRY(name) STAT_PROP_ENTRY_EX(name,name)
memset(ssb, 0, sizeof(php_stream_statbuf));
STAT_PROP_ENTRY(dev);
STAT_PROP_ENTRY(ino);
STAT_PROP_ENTRY(mode);
STAT_PROP_ENTRY(nlink);
STAT_PROP_ENTRY(uid);
STAT_PROP_ENTRY(gid);
#if HAVE_STRUCT_STAT_ST_RDEV
STAT_PROP_ENTRY(rdev);
#endif
STAT_PROP_ENTRY(size);
STAT_PROP_ENTRY(atime);
STAT_PROP_ENTRY(mtime);
STAT_PROP_ENTRY(ctime);
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
STAT_PROP_ENTRY(blksize);
#endif
#ifdef HAVE_STRUCT_STAT_ST_BLOCKS
STAT_PROP_ENTRY(blocks);
#endif
#undef STAT_PROP_ENTRY
#undef STAT_PROP_ENTRY_EX
return SUCCESS;
}
static int php_userstreamop_stat(php_stream *stream, php_stream_statbuf *ssb)
{
zval func_name;
zval retval;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
int ret = -1;
ZVAL_STRINGL(&func_name, USERSTREAM_STAT, sizeof(USERSTREAM_STAT)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
if (call_result == SUCCESS && Z_TYPE(retval) == IS_ARRAY) {
if (SUCCESS == statbuf_from_array(&retval, ssb))
ret = 0;
} else {
if (call_result == FAILURE) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_STAT " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
}
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
return ret;
}
static int php_userstreamop_set_option(php_stream *stream, int option, int value, void *ptrparam) {
zval func_name;
zval retval;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
int ret = PHP_STREAM_OPTION_RETURN_NOTIMPL;
zval args[3];
switch (option) {
case PHP_STREAM_OPTION_CHECK_LIVENESS:
ZVAL_STRINGL(&func_name, USERSTREAM_EOF, sizeof(USERSTREAM_EOF)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
if (call_result == SUCCESS && (Z_TYPE(retval) == IS_FALSE || Z_TYPE(retval) == IS_TRUE)) {
ret = zval_is_true(&retval) ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
} else {
ret = PHP_STREAM_OPTION_RETURN_ERR;
php_error_docref(NULL, E_WARNING,
"%s::" USERSTREAM_EOF " is not implemented! Assuming EOF",
ZSTR_VAL(us->wrapper->ce->name));
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
break;
case PHP_STREAM_OPTION_LOCKING:
ZVAL_LONG(&args[0], 0);
if (value & LOCK_NB) {
Z_LVAL_P(&args[0]) |= PHP_LOCK_NB;
}
switch(value & ~LOCK_NB) {
case LOCK_SH:
Z_LVAL_P(&args[0]) |= PHP_LOCK_SH;
break;
case LOCK_EX:
Z_LVAL_P(&args[0]) |= PHP_LOCK_EX;
break;
case LOCK_UN:
Z_LVAL_P(&args[0]) |= PHP_LOCK_UN;
break;
}
/* TODO wouldblock */
ZVAL_STRINGL(&func_name, USERSTREAM_LOCK, sizeof(USERSTREAM_LOCK)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 1, args);
if (call_result == SUCCESS && (Z_TYPE(retval) == IS_FALSE || Z_TYPE(retval) == IS_TRUE)) {
ret = (Z_TYPE(retval) == IS_FALSE);
} else if (call_result == FAILURE) {
if (value == 0) {
/* lock support test (TODO: more check) */
ret = PHP_STREAM_OPTION_RETURN_OK;
} else {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_LOCK " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
ret = PHP_STREAM_OPTION_RETURN_ERR;
}
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
zval_ptr_dtor(&args[0]);
break;
case PHP_STREAM_OPTION_TRUNCATE_API:
ZVAL_STRINGL(&func_name, USERSTREAM_TRUNCATE, sizeof(USERSTREAM_TRUNCATE)-1);
switch (value) {
case PHP_STREAM_TRUNCATE_SUPPORTED:
if (zend_is_callable_ex(&func_name, Z_OBJ(us->object), IS_CALLABLE_SUPPRESS_DEPRECATIONS, NULL, NULL, NULL))
ret = PHP_STREAM_OPTION_RETURN_OK;
else
ret = PHP_STREAM_OPTION_RETURN_ERR;
break;
case PHP_STREAM_TRUNCATE_SET_SIZE: {
ptrdiff_t new_size = *(ptrdiff_t*) ptrparam;
if (new_size >= 0 && new_size <= (ptrdiff_t)LONG_MAX) {
ZVAL_LONG(&args[0], (zend_long)new_size);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 1, args);
if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF) {
if (Z_TYPE(retval) == IS_FALSE || Z_TYPE(retval) == IS_TRUE) {
ret = (Z_TYPE(retval) == IS_TRUE) ? PHP_STREAM_OPTION_RETURN_OK :
PHP_STREAM_OPTION_RETURN_ERR;
} else {
php_error_docref(NULL, E_WARNING,
"%s::" USERSTREAM_TRUNCATE " did not return a boolean!",
ZSTR_VAL(us->wrapper->ce->name));
}
} else {
php_error_docref(NULL, E_WARNING,
"%s::" USERSTREAM_TRUNCATE " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&args[0]);
} else { /* bad new size */
ret = PHP_STREAM_OPTION_RETURN_ERR;
}
break;
}
}
zval_ptr_dtor(&func_name);
break;
case PHP_STREAM_OPTION_READ_BUFFER:
case PHP_STREAM_OPTION_WRITE_BUFFER:
case PHP_STREAM_OPTION_READ_TIMEOUT:
case PHP_STREAM_OPTION_BLOCKING: {
ZVAL_STRINGL(&func_name, USERSTREAM_SET_OPTION, sizeof(USERSTREAM_SET_OPTION)-1);
ZVAL_LONG(&args[0], option);
ZVAL_NULL(&args[1]);
ZVAL_NULL(&args[2]);
switch(option) {
case PHP_STREAM_OPTION_READ_BUFFER:
case PHP_STREAM_OPTION_WRITE_BUFFER:
ZVAL_LONG(&args[1], value);
if (ptrparam) {
ZVAL_LONG(&args[2], *(long *)ptrparam);
} else {
ZVAL_LONG(&args[2], BUFSIZ);
}
break;
case PHP_STREAM_OPTION_READ_TIMEOUT: {
struct timeval tv = *(struct timeval*)ptrparam;
ZVAL_LONG(&args[1], tv.tv_sec);
ZVAL_LONG(&args[2], tv.tv_usec);
break;
}
case PHP_STREAM_OPTION_BLOCKING: