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userspace.c
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2014 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: |
| http://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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Wez Furlong <[email protected]> |
| Sara Golemon <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#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
static int le_protocols;
struct php_user_stream_wrapper {
char * protoname;
char * classname;
zend_class_entry *ce;
php_stream_wrapper wrapper;
};
static php_stream *user_wrapper_opener(php_stream_wrapper *wrapper, const char *filename, const char *mode, int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC);
static int user_wrapper_stat_url(php_stream_wrapper *wrapper, const char *url, int flags, php_stream_statbuf *ssb, php_stream_context *context TSRMLS_DC);
static int user_wrapper_unlink(php_stream_wrapper *wrapper, const char *url, int options, php_stream_context *context TSRMLS_DC);
static int user_wrapper_rename(php_stream_wrapper *wrapper, const char *url_from, const char *url_to, int options, php_stream_context *context TSRMLS_DC);
static int user_wrapper_mkdir(php_stream_wrapper *wrapper, const char *url, int mode, int options, php_stream_context *context TSRMLS_DC);
static int user_wrapper_rmdir(php_stream_wrapper *wrapper, const char *url, int options, php_stream_context *context TSRMLS_DC);
static int user_wrapper_metadata(php_stream_wrapper *wrapper, const char *url, int option, void *value, php_stream_context *context TSRMLS_DC);
static php_stream *user_wrapper_opendir(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC);
static php_stream_wrapper_ops user_stream_wops = {
user_wrapper_opener,
NULL, /* close - the streams themselves know how */
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_rsrc_list_entry *rsrc TSRMLS_DC)
{
struct php_user_stream_wrapper * uwrap = (struct php_user_stream_wrapper*)rsrc->ptr;
efree(uwrap->protoname);
efree(uwrap->classname);
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_INT_CONSTANT("STREAM_USE_PATH", USE_PATH, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_IGNORE_URL", IGNORE_URL, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_REPORT_ERRORS", REPORT_ERRORS, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_MUST_SEEK", STREAM_MUST_SEEK, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_URL_STAT_LINK", PHP_STREAM_URL_STAT_LINK, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_URL_STAT_QUIET", PHP_STREAM_URL_STAT_QUIET, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_MKDIR_RECURSIVE", PHP_STREAM_MKDIR_RECURSIVE, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_IS_URL", PHP_STREAM_IS_URL, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_OPTION_BLOCKING", PHP_STREAM_OPTION_BLOCKING, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_OPTION_READ_TIMEOUT", PHP_STREAM_OPTION_READ_TIMEOUT, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_OPTION_READ_BUFFER", PHP_STREAM_OPTION_READ_BUFFER, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_OPTION_WRITE_BUFFER", PHP_STREAM_OPTION_WRITE_BUFFER, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_BUFFER_NONE", PHP_STREAM_BUFFER_NONE, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_BUFFER_LINE", PHP_STREAM_BUFFER_LINE, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_BUFFER_FULL", PHP_STREAM_BUFFER_FULL, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_CAST_AS_STREAM", PHP_STREAM_AS_STDIO, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_CAST_FOR_SELECT", PHP_STREAM_AS_FD_FOR_SELECT, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_META_TOUCH", PHP_STREAM_META_TOUCH, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_META_OWNER", PHP_STREAM_META_OWNER, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_META_OWNER_NAME", PHP_STREAM_META_OWNER_NAME, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_META_GROUP", PHP_STREAM_META_GROUP, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_META_GROUP_NAME", PHP_STREAM_META_GROUP_NAME, CONST_CS|CONST_PERSISTENT);
REGISTER_INT_CONSTANT("STREAM_META_ACCESS", PHP_STREAM_META_ACCESS, CONST_CS|CONST_PERSISTENT);
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 zval *user_stream_create_object(struct php_user_stream_wrapper *uwrap, php_stream_context *context TSRMLS_DC)
{
zval *object;
/* create an instance of our class */
ALLOC_ZVAL(object);
object_init_ex(object, uwrap->ce);
Z_SET_REFCOUNT_P(object, 1);
Z_SET_ISREF_P(object);
if (context) {
add_property_resource(object, "context", context->rsrc_id);
zend_list_addref(context->rsrc_id);
} else {
add_property_null(object, "context");
}
if (uwrap->ce->constructor) {
zend_fcall_info fci;
zend_fcall_info_cache fcc;
zval *retval_ptr;
fci.size = sizeof(fci);
fci.function_table = &uwrap->ce->function_table;
fci.function_name = NULL;
fci.symbol_table = NULL;
fci.object_ptr = object;
fci.retval_ptr_ptr = &retval_ptr;
fci.param_count = 0;
fci.params = NULL;
fci.no_separation = 1;
fcc.initialized = 1;
fcc.function_handler = uwrap->ce->constructor;
fcc.calling_scope = EG(scope);
fcc.called_scope = Z_OBJCE_P(object);
fcc.object_ptr = object;
if (zend_call_function(&fci, &fcc TSRMLS_CC) == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not execute %s::%s()", uwrap->ce->name, uwrap->ce->constructor->common.function_name);
zval_dtor(object);
FREE_ZVAL(object);
return NULL;
} else {
if (retval_ptr) {
zval_ptr_dtor(&retval_ptr);
}
}
}
return object;
}
static php_stream *user_wrapper_opener(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC)
{
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper*)wrapper->abstract;
php_userstream_data_t *us;
zval *zfilename, *zmode, *zopened, *zoptions, *zretval = NULL, *zfuncname;
zval **args[4];
int call_result;
php_stream *stream = NULL;
zend_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 TSRMLS_CC, "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;
us->object = user_stream_create_object(uwrap, context TSRMLS_CC);
if(us->object == NULL) {
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 */
MAKE_STD_ZVAL(zfilename);
ZVAL_STRING(zfilename, filename, 1);
args[0] = &zfilename;
MAKE_STD_ZVAL(zmode);
ZVAL_STRING(zmode, mode, 1);
args[1] = &zmode;
MAKE_STD_ZVAL(zoptions);
ZVAL_INT(zoptions, options);
args[2] = &zoptions;
MAKE_STD_ZVAL(zopened);
Z_SET_REFCOUNT_P(zopened, 1);
Z_SET_ISREF_P(zopened);
ZVAL_NULL(zopened);
args[3] = &zopened;
MAKE_STD_ZVAL(zfuncname);
ZVAL_STRING(zfuncname, USERSTREAM_OPEN, 1);
call_result = call_user_function_ex(NULL,
&us->object,
zfuncname,
&zretval,
4, args,
0, NULL TSRMLS_CC);
if (call_result == SUCCESS && zretval != NULL && 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_TYPE_P(zopened) == IS_STRING && opened_path) {
*opened_path = estrndup(Z_STRVAL_P(zopened), Z_STRSIZE_P(zopened));
}
/* set wrapper data to be a reference to our object */
stream->wrapperdata = us->object;
zval_add_ref(&stream->wrapperdata);
} else {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "\"%s::" USERSTREAM_OPEN "\" call failed",
us->wrapper->classname);
}
/* destroy everything else */
if (stream == NULL) {
zval_ptr_dtor(&us->object);
efree(us);
}
if (zretval)
zval_ptr_dtor(&zretval);
zval_ptr_dtor(&zfuncname);
zval_ptr_dtor(&zopened);
zval_ptr_dtor(&zoptions);
zval_ptr_dtor(&zmode);
zval_ptr_dtor(&zfilename);
FG(user_stream_current_filename) = NULL;
PG(in_user_include) = old_in_user_include;
return stream;
}
static php_stream *user_wrapper_opendir(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC)
{
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper*)wrapper->abstract;
php_userstream_data_t *us;
zval *zfilename, *zoptions, *zretval = NULL, *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 TSRMLS_CC, "infinite recursion prevented");
return NULL;
}
FG(user_stream_current_filename) = filename;
us = emalloc(sizeof(*us));
us->wrapper = uwrap;
us->object = user_stream_create_object(uwrap, context TSRMLS_CC);
if(us->object == NULL) {
FG(user_stream_current_filename) = NULL;
efree(us);
return NULL;
}
/* call it's dir_open method - set up params first */
MAKE_STD_ZVAL(zfilename);
ZVAL_STRING(zfilename, filename, 1);
args[0] = &zfilename;
MAKE_STD_ZVAL(zoptions);
ZVAL_INT(zoptions, options);
args[1] = &zoptions;
MAKE_STD_ZVAL(zfuncname);
ZVAL_STRING(zfuncname, USERSTREAM_DIR_OPEN, 1);
call_result = call_user_function_ex(NULL,
&us->object,
zfuncname,
&zretval,
2, args,
0, NULL TSRMLS_CC);
if (call_result == SUCCESS && zretval != NULL && 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 */
stream->wrapperdata = us->object;
zval_add_ref(&stream->wrapperdata);
} else {
php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "\"%s::" USERSTREAM_DIR_OPEN "\" call failed",
us->wrapper->classname);
}
/* destroy everything else */
if (stream == NULL) {
zval_ptr_dtor(&us->object);
efree(us);
}
if (zretval)
zval_ptr_dtor(&zretval);
zval_ptr_dtor(&zfuncname);
zval_ptr_dtor(&zoptions);
zval_ptr_dtor(&zfilename);
FG(user_stream_current_filename) = NULL;
return stream;
}
/* {{{ proto bool stream_wrapper_register(string protocol, string classname[, integer flags])
Registers a custom URL protocol handler class */
PHP_FUNCTION(stream_wrapper_register)
{
char *protocol, *classname;
php_size_t protocol_len, classname_len;
struct php_user_stream_wrapper * uwrap;
int rsrc_id;
php_int_t flags = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "SS|i", &protocol, &protocol_len, &classname, &classname_len, &flags) == FAILURE) {
RETURN_FALSE;
}
uwrap = (struct php_user_stream_wrapper *)ecalloc(1, sizeof(*uwrap));
uwrap->protoname = estrndup(protocol, protocol_len);
uwrap->classname = estrndup(classname, classname_len);
uwrap->wrapper.wops = &user_stream_wops;
uwrap->wrapper.abstract = uwrap;
uwrap->wrapper.is_url = ((flags & PHP_STREAM_IS_URL) != 0);
rsrc_id = ZEND_REGISTER_RESOURCE(NULL, uwrap, le_protocols);
if (zend_lookup_class(uwrap->classname, classname_len, (zend_class_entry***)&uwrap->ce TSRMLS_CC) == SUCCESS) {
uwrap->ce = *(zend_class_entry**)uwrap->ce;
if (php_register_url_stream_wrapper_volatile(protocol, &uwrap->wrapper TSRMLS_CC) == SUCCESS) {
RETURN_TRUE;
} else {
/* We failed. But why? */
if (zend_hash_exists(php_stream_get_url_stream_wrappers_hash(), protocol, protocol_len + 1)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Protocol %s:// is already defined.", protocol);
} else {
/* Hash doesn't exist so it must have been an invalid protocol scheme */
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid protocol scheme specified. Unable to register wrapper class %s to %s://", classname, protocol);
}
}
} else {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "class '%s' is undefined", classname);
}
zend_list_delete(rsrc_id);
RETURN_FALSE;
}
/* }}} */
/* {{{ proto bool stream_wrapper_unregister(string protocol)
Unregister a wrapper for the life of the current request. */
PHP_FUNCTION(stream_wrapper_unregister)
{
char *protocol;
php_size_t protocol_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "S", &protocol, &protocol_len) == FAILURE) {
RETURN_FALSE;
}
if (php_unregister_url_stream_wrapper_volatile(protocol TSRMLS_CC) == FAILURE) {
/* We failed */
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to unregister protocol %s://", protocol);
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
/* {{{ proto bool stream_wrapper_restore(string protocol)
Restore the original protocol handler, overriding if necessary */
PHP_FUNCTION(stream_wrapper_restore)
{
char *protocol;
php_size_t protocol_len;
php_stream_wrapper **wrapperpp = NULL, *wrapper;
HashTable *global_wrapper_hash;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "S", &protocol, &protocol_len) == FAILURE) {
RETURN_FALSE;
}
global_wrapper_hash = php_stream_get_url_stream_wrappers_hash_global();
if (php_stream_get_url_stream_wrappers_hash() == global_wrapper_hash) {
php_error_docref(NULL TSRMLS_CC, E_NOTICE, "%s:// was never changed, nothing to restore", protocol);
RETURN_TRUE;
}
if ((zend_hash_find(global_wrapper_hash, protocol, protocol_len + 1, (void**)&wrapperpp) == FAILURE) || !wrapperpp) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s:// never existed, nothing to restore", protocol);
RETURN_FALSE;
}
/* next line might delete the pointer that wrapperpp points at, so deref it now */
wrapper = *wrapperpp;
/* A failure here could be okay given that the protocol might have been merely unregistered */
php_unregister_url_stream_wrapper_volatile(protocol TSRMLS_CC);
if (php_register_url_stream_wrapper_volatile(protocol, wrapper TSRMLS_CC) == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to restore original %s:// wrapper", protocol);
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
static php_size_t php_userstreamop_write(php_stream *stream, const char *buf, php_size_t count TSRMLS_DC)
{
zval func_name;
zval *retval = NULL;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
zval **args[1];
zval *zbufptr;
php_size_t didwrite = 0;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_WRITE, sizeof(USERSTREAM_WRITE)-1, 0);
MAKE_STD_ZVAL(zbufptr);
ZVAL_STRINGL(zbufptr, (char*)buf, count, 1);;
args[0] = &zbufptr;
call_result = call_user_function_ex(NULL,
&us->object,
&func_name,
&retval,
1, args,
0, NULL TSRMLS_CC);
zval_ptr_dtor(&zbufptr);
didwrite = 0;
if (call_result == SUCCESS && retval != NULL) {
convert_to_int(retval);
didwrite = Z_IVAL_P(retval);
} else if (call_result == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s::" USERSTREAM_WRITE " is not implemented!",
us->wrapper->classname);
}
/* don't allow strange buffer overruns due to bogus return */
if (didwrite > count) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s::" USERSTREAM_WRITE " wrote " ZEND_INT_FMT " bytes more data than requested (" ZEND_INT_FMT " written, " ZEND_INT_FMT " max)",
us->wrapper->classname,
(php_int_t)(didwrite - count), (php_int_t)didwrite, (php_int_t)count);
didwrite = count;
}
if (retval)
zval_ptr_dtor(&retval);
return didwrite;
}
static php_size_t php_userstreamop_read(php_stream *stream, char *buf, php_size_t count TSRMLS_DC)
{
zval func_name;
zval *retval = NULL;
zval **args[1];
int call_result;
php_size_t didread = 0;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
zval *zcount;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_READ, sizeof(USERSTREAM_READ)-1, 0);
MAKE_STD_ZVAL(zcount);
ZVAL_INT(zcount, count);
args[0] = &zcount;
call_result = call_user_function_ex(NULL,
&us->object,
&func_name,
&retval,
1, args,
0, NULL TSRMLS_CC);
if (call_result == SUCCESS && retval != NULL) {
convert_to_string(retval);
didread = Z_STRSIZE_P(retval);
if (didread > count) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s::" USERSTREAM_READ " - read " ZEND_INT_FMT " bytes more data than requested (" ZEND_INT_FMT " read, " ZEND_INT_FMT " max) - excess data will be lost",
us->wrapper->classname, (php_int_t)(didread - count), (php_int_t)didread, (php_int_t)count);
didread = count;
}
if (didread > 0)
memcpy(buf, Z_STRVAL_P(retval), didread);
} else if (call_result == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s::" USERSTREAM_READ " is not implemented!",
us->wrapper->classname);
}
zval_ptr_dtor(&zcount);
if (retval) {
zval_ptr_dtor(&retval);
retval = NULL;
}
/* 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, 0);
call_result = call_user_function_ex(NULL,
&us->object,
&func_name,
&retval,
0, NULL, 0, NULL TSRMLS_CC);
if (call_result == SUCCESS && retval != NULL && zval_is_true(retval)) {
stream->eof = 1;
} else if (call_result == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING,
"%s::" USERSTREAM_EOF " is not implemented! Assuming EOF",
us->wrapper->classname);
stream->eof = 1;
}
if (retval) {
zval_ptr_dtor(&retval);
retval = NULL;
}
return didread;
}
static int php_userstreamop_close(php_stream *stream, int close_handle TSRMLS_DC)
{
zval func_name;
zval *retval = NULL;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_CLOSE, sizeof(USERSTREAM_CLOSE)-1, 0);
call_user_function_ex(NULL,
&us->object,
&func_name,
&retval,
0, NULL, 0, NULL TSRMLS_CC);
if (retval)
zval_ptr_dtor(&retval);
zval_ptr_dtor(&us->object);
efree(us);
return 0;
}
static int php_userstreamop_flush(php_stream *stream TSRMLS_DC)
{
zval func_name;
zval *retval = NULL;
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, 0);
call_result = call_user_function_ex(NULL,
&us->object,
&func_name,
&retval,
0, NULL, 0, NULL TSRMLS_CC);
if (call_result == SUCCESS && retval != NULL && zval_is_true(retval))
call_result = 0;
else
call_result = -1;
if (retval)
zval_ptr_dtor(&retval);
return call_result;
}
static int php_userstreamop_seek(php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffs TSRMLS_DC)
{
zval func_name;
zval *retval = NULL;
int call_result, ret;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
zval **args[2];
zval *zoffs, *zwhence;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_SEEK, sizeof(USERSTREAM_SEEK)-1, 0);
MAKE_STD_ZVAL(zoffs);
ZVAL_INT(zoffs, offset);
args[0] = &zoffs;
MAKE_STD_ZVAL(zwhence);
ZVAL_INT(zwhence, whence);
args[1] = &zwhence;
call_result = call_user_function_ex(NULL,
&us->object,
&func_name,
&retval,
2, args,
0, NULL TSRMLS_CC);
zval_ptr_dtor(&zoffs);
zval_ptr_dtor(&zwhence);
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 */
if (retval)
zval_ptr_dtor(&retval);
return -1;
} else if (call_result == SUCCESS && retval != NULL && zval_is_true(retval)) {
ret = 0;
} else {
ret = -1;
}
if (retval) {
zval_ptr_dtor(&retval);
retval = NULL;
}
if (ret) {
return ret;
}
/* now determine where we are */
ZVAL_STRINGL(&func_name, USERSTREAM_TELL, sizeof(USERSTREAM_TELL)-1, 0);
call_result = call_user_function_ex(NULL,
&us->object,
&func_name,
&retval,
0, NULL, 0, NULL TSRMLS_CC);
if (call_result == SUCCESS && retval != NULL && Z_TYPE_P(retval) == IS_INT) {
*newoffs = Z_IVAL_P(retval);
ret = 0;
} else if (call_result == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s::" USERSTREAM_TELL " is not implemented!", us->wrapper->classname);
ret = -1;
} else {
ret = -1;
}
if (retval) {
zval_ptr_dtor(&retval);
}
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 TSRMLS_DC)
{
zval **elem;
#define STAT_PROP_ENTRY_EX(name, name2) \
if (SUCCESS == zend_hash_find(Z_ARRVAL_P(array), #name, sizeof(#name), (void**)&elem)) { \
SEPARATE_ZVAL(elem); \
convert_to_int(*elem); \
ssb->sb.st_##name2 = Z_IVAL_PP(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_ST_RDEV
STAT_PROP_ENTRY(rdev);
#endif
STAT_PROP_ENTRY(size);
#ifdef NETWARE
STAT_PROP_ENTRY_EX(atime, atime.tv_sec);
STAT_PROP_ENTRY_EX(mtime, mtime.tv_sec);
STAT_PROP_ENTRY_EX(ctime, ctime.tv_sec);
#else
STAT_PROP_ENTRY(atime);
STAT_PROP_ENTRY(mtime);
STAT_PROP_ENTRY(ctime);
#endif
#ifdef HAVE_ST_BLKSIZE
STAT_PROP_ENTRY(blksize);
#endif
#ifdef HAVE_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 TSRMLS_DC)
{
zval func_name;
zval *retval = NULL;
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, 0);
call_result = call_user_function_ex(NULL,
&us->object,
&func_name,
&retval,
0, NULL, 0, NULL TSRMLS_CC);
if (call_result == SUCCESS && retval != NULL && Z_TYPE_P(retval) == IS_ARRAY) {
if (SUCCESS == statbuf_from_array(retval, ssb TSRMLS_CC))
ret = 0;
} else {
if (call_result == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s::" USERSTREAM_STAT " is not implemented!",
us->wrapper->classname);
}
}
if (retval)
zval_ptr_dtor(&retval);
return ret;
}
static int php_userstreamop_set_option(php_stream *stream, int option, int value, void *ptrparam TSRMLS_DC) {
zval func_name;
zval *retval = NULL;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
int ret = PHP_STREAM_OPTION_RETURN_NOTIMPL;
zval *zvalue = NULL;
zval **args[3];
switch (option) {
case PHP_STREAM_OPTION_CHECK_LIVENESS:
ZVAL_STRINGL(&func_name, USERSTREAM_EOF, sizeof(USERSTREAM_EOF)-1, 0);
call_result = call_user_function_ex(NULL, &us->object, &func_name, &retval, 0, NULL, 0, NULL TSRMLS_CC);
if (call_result == SUCCESS && retval != NULL && Z_TYPE_P(retval) == IS_BOOL) {
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 TSRMLS_CC, E_WARNING,
"%s::" USERSTREAM_EOF " is not implemented! Assuming EOF",
us->wrapper->classname);
}
break;
case PHP_STREAM_OPTION_LOCKING:
MAKE_STD_ZVAL(zvalue);
ZVAL_INT(zvalue, 0);
if (value & LOCK_NB) {
Z_IVAL_P(zvalue) |= PHP_LOCK_NB;
}
switch(value & ~LOCK_NB) {
case LOCK_SH:
Z_IVAL_P(zvalue) |= PHP_LOCK_SH;
break;
case LOCK_EX:
Z_IVAL_P(zvalue) |= PHP_LOCK_EX;
break;
case LOCK_UN:
Z_IVAL_P(zvalue) |= PHP_LOCK_UN;
break;
}