PAL.C.T MINI SHELL
/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2017 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 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_0.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. |
+----------------------------------------------------------------------+
| Author: Ilia Alshanetsky <ilia@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include <magic.h>
/*
* HOWMANY specifies the maximum offset libmagic will look at
* this is currently hardcoded in the libmagic source but not exported
*/
#ifndef HOWMANY
#define HOWMANY 65536
#endif
#include "php_ini.h"
#include "ext/standard/info.h"
#include "ext/standard/file.h" /* needed for context stuff */
#include "php_fileinfo.h"
#include "fopen_wrappers.h" /* needed for is_url */
#include "Zend/zend_exceptions.h"
/* {{{ macros and type definitions */
typedef struct _php_fileinfo {
zend_long options;
struct magic_set *magic;
} php_fileinfo;
static zend_object_handlers finfo_object_handlers;
zend_class_entry *finfo_class_entry;
typedef struct _finfo_object {
php_fileinfo *ptr;
zend_object zo;
} finfo_object;
#define FILEINFO_DECLARE_INIT_OBJECT(object) \
zval *object = ZEND_IS_METHOD_CALL() ? getThis() : NULL;
static inline finfo_object *php_finfo_fetch_object(zend_object *obj) {
return (finfo_object *)((char*)(obj) - XtOffsetOf(finfo_object, zo));
}
#define Z_FINFO_P(zv) php_finfo_fetch_object(Z_OBJ_P((zv)))
#define FILEINFO_REGISTER_OBJECT(_object, _ptr) \
{ \
finfo_object *obj; \
obj = Z_FINFO_P(_object); \
obj->ptr = _ptr; \
}
#define FILEINFO_FROM_OBJECT(finfo, object) \
{ \
finfo_object *obj = Z_FINFO_P(object); \
finfo = obj->ptr; \
if (!finfo) { \
php_error_docref(NULL, E_WARNING, "The invalid fileinfo object."); \
RETURN_FALSE; \
} \
}
/* {{{ finfo_objects_free
*/
static void finfo_objects_free(zend_object *object)
{
finfo_object *intern = php_finfo_fetch_object(object);
if (intern->ptr) {
magic_close(intern->ptr->magic);
efree(intern->ptr);
}
zend_object_std_dtor(&intern->zo);
}
/* }}} */
/* {{{ finfo_objects_new
*/
PHP_FILEINFO_API zend_object *finfo_objects_new(zend_class_entry *class_type)
{
finfo_object *intern;
intern = ecalloc(1, sizeof(finfo_object) + zend_object_properties_size(class_type));
zend_object_std_init(&intern->zo, class_type);
object_properties_init(&intern->zo, class_type);
intern->zo.handlers = &finfo_object_handlers;
return &intern->zo;
}
/* }}} */
/* {{{ arginfo */
ZEND_BEGIN_ARG_INFO_EX(arginfo_finfo_open, 0, 0, 0)
ZEND_ARG_INFO(0, options)
ZEND_ARG_INFO(0, arg)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_finfo_close, 0, 0, 1)
ZEND_ARG_INFO(0, finfo)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_finfo_set_flags, 0, 0, 2)
ZEND_ARG_INFO(0, finfo)
ZEND_ARG_INFO(0, options)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_finfo_method_set_flags, 0, 0, 1)
ZEND_ARG_INFO(0, options)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_finfo_file, 0, 0, 2)
ZEND_ARG_INFO(0, finfo)
ZEND_ARG_INFO(0, filename)
ZEND_ARG_INFO(0, options)
ZEND_ARG_INFO(0, context)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_finfo_method_file, 0, 0, 1)
ZEND_ARG_INFO(0, filename)
ZEND_ARG_INFO(0, options)
ZEND_ARG_INFO(0, context)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_finfo_buffer, 0, 0, 2)
ZEND_ARG_INFO(0, finfo)
ZEND_ARG_INFO(0, string)
ZEND_ARG_INFO(0, options)
ZEND_ARG_INFO(0, context)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_finfo_method_buffer, 0, 0, 1)
ZEND_ARG_INFO(0, string)
ZEND_ARG_INFO(0, options)
ZEND_ARG_INFO(0, context)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_mime_content_type, 0, 0, 1)
ZEND_ARG_INFO(0, string)
ZEND_END_ARG_INFO()
/* }}} */
/* {{{ finfo_class_functions
*/
zend_function_entry finfo_class_functions[] = {
ZEND_ME_MAPPING(finfo, finfo_open, arginfo_finfo_open, ZEND_ACC_PUBLIC)
ZEND_ME_MAPPING(set_flags, finfo_set_flags,arginfo_finfo_method_set_flags, ZEND_ACC_PUBLIC)
ZEND_ME_MAPPING(file, finfo_file, arginfo_finfo_method_file, ZEND_ACC_PUBLIC)
ZEND_ME_MAPPING(buffer, finfo_buffer, arginfo_finfo_method_buffer, ZEND_ACC_PUBLIC)
PHP_FE_END
};
/* }}} */
#define FINFO_SET_OPTION(magic, options) \
if (magic_setflags(magic, options) == -1) { \
php_error_docref(NULL, E_WARNING, "Failed to set option '" ZEND_LONG_FMT "' %d:%s", \
options, magic_errno(magic), magic_error(magic)); \
RETURN_FALSE; \
}
/* True global resources - no need for thread safety here */
static int le_fileinfo;
/* }}} */
void finfo_resource_destructor(zend_resource *rsrc) /* {{{ */
{
if (rsrc->ptr) {
php_fileinfo *finfo = (php_fileinfo *) rsrc->ptr;
magic_close(finfo->magic);
efree(rsrc->ptr);
rsrc->ptr = NULL;
}
}
/* }}} */
/* {{{ fileinfo_functions[]
*/
zend_function_entry fileinfo_functions[] = {
PHP_FE(finfo_open, arginfo_finfo_open)
PHP_FE(finfo_close, arginfo_finfo_close)
PHP_FE(finfo_set_flags, arginfo_finfo_set_flags)
PHP_FE(finfo_file, arginfo_finfo_file)
PHP_FE(finfo_buffer, arginfo_finfo_buffer)
PHP_FE(mime_content_type, arginfo_mime_content_type)
PHP_FE_END
};
/* }}} */
/* {{{ PHP_MINIT_FUNCTION
*/
PHP_MINIT_FUNCTION(finfo)
{
zend_class_entry _finfo_class_entry;
INIT_CLASS_ENTRY(_finfo_class_entry, "finfo", finfo_class_functions);
_finfo_class_entry.create_object = finfo_objects_new;
finfo_class_entry = zend_register_internal_class(&_finfo_class_entry);
/* copy the standard object handlers to you handler table */
memcpy(&finfo_object_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
finfo_object_handlers.offset = XtOffsetOf(finfo_object, zo);
finfo_object_handlers.free_obj = finfo_objects_free;
le_fileinfo = zend_register_list_destructors_ex(finfo_resource_destructor, NULL, "file_info", module_number);
REGISTER_LONG_CONSTANT("FILEINFO_NONE", MAGIC_NONE, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILEINFO_SYMLINK", MAGIC_SYMLINK, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILEINFO_MIME", MAGIC_MIME, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILEINFO_MIME_TYPE", MAGIC_MIME_TYPE, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILEINFO_MIME_ENCODING",MAGIC_MIME_ENCODING, CONST_CS|CONST_PERSISTENT);
/* REGISTER_LONG_CONSTANT("FILEINFO_COMPRESS", MAGIC_COMPRESS, CONST_CS|CONST_PERSISTENT); disabled, as it does fork now */
REGISTER_LONG_CONSTANT("FILEINFO_DEVICES", MAGIC_DEVICES, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILEINFO_CONTINUE", MAGIC_CONTINUE, CONST_CS|CONST_PERSISTENT);
#ifdef MAGIC_PRESERVE_ATIME
REGISTER_LONG_CONSTANT("FILEINFO_PRESERVE_ATIME", MAGIC_PRESERVE_ATIME, CONST_CS|CONST_PERSISTENT);
#endif
#ifdef MAGIC_RAW
REGISTER_LONG_CONSTANT("FILEINFO_RAW", MAGIC_RAW, CONST_CS|CONST_PERSISTENT);
#endif
return SUCCESS;
}
/* }}} */
/* {{{ fileinfo_module_entry
*/
zend_module_entry fileinfo_module_entry = {
STANDARD_MODULE_HEADER,
"fileinfo",
fileinfo_functions,
PHP_MINIT(finfo),
NULL,
NULL,
NULL,
PHP_MINFO(fileinfo),
PHP_FILEINFO_VERSION,
STANDARD_MODULE_PROPERTIES
};
/* }}} */
#ifdef COMPILE_DL_FILEINFO
ZEND_GET_MODULE(fileinfo)
#endif
/* {{{ PHP_MINFO_FUNCTION
*/
PHP_MINFO_FUNCTION(fileinfo)
{
char magic_ver[5];
(void)snprintf(magic_ver, 4, "%d", magic_version());
magic_ver[4] = '\0';
php_info_print_table_start();
php_info_print_table_row(2, "fileinfo support", "enabled");
php_info_print_table_row(2, "version", PHP_FILEINFO_VERSION);
php_info_print_table_row(2, "libmagic", magic_ver);
php_info_print_table_end();
}
/* }}} */
/* {{{ proto resource finfo_open([int options [, string arg]])
Create a new fileinfo resource. */
PHP_FUNCTION(finfo_open)
{
zend_long options = MAGIC_NONE;
char *file = NULL;
size_t file_len = 0;
php_fileinfo *finfo;
FILEINFO_DECLARE_INIT_OBJECT(object)
char resolved_path[MAXPATHLEN];
zend_error_handling zeh;
int flags = object ? ZEND_PARSE_PARAMS_THROW : 0;
if (zend_parse_parameters_ex(flags, ZEND_NUM_ARGS(), "|lp", &options, &file, &file_len) == FAILURE) {
RETURN_FALSE;
}
if (object) {
finfo_object *finfo_obj = Z_FINFO_P(object);
zend_replace_error_handling(EH_THROW, NULL, &zeh);
if (finfo_obj->ptr) {
magic_close(finfo_obj->ptr->magic);
efree(finfo_obj->ptr);
finfo_obj->ptr = NULL;
}
}
if (file_len == 0) {
file = NULL;
} else if (file && *file) { /* user specified file, perform open_basedir checks */
if (php_check_open_basedir(file)) {
if (object) {
zend_restore_error_handling(&zeh);
if (!EG(exception)) {
zend_throw_exception(NULL, "Constructor failed", 0);
}
}
RETURN_FALSE;
}
if (!expand_filepath_with_mode(file, resolved_path, NULL, 0, CWD_EXPAND)) {
if (object) {
zend_restore_error_handling(&zeh);
if (!EG(exception)) {
zend_throw_exception(NULL, "Constructor failed", 0);
}
}
RETURN_FALSE;
}
file = resolved_path;
}
finfo = emalloc(sizeof(php_fileinfo));
finfo->options = options;
finfo->magic = magic_open(options);
if (finfo->magic == NULL) {
efree(finfo);
php_error_docref(NULL, E_WARNING, "Invalid mode '" ZEND_LONG_FMT "'.", options);
if (object) {
zend_restore_error_handling(&zeh);
if (!EG(exception)) {
zend_throw_exception(NULL, "Constructor failed", 0);
}
}
RETURN_FALSE;
}
if (magic_load(finfo->magic, file) == -1) {
php_error_docref(NULL, E_WARNING, "Failed to load magic database at '%s'.", file);
magic_close(finfo->magic);
efree(finfo);
if (object) {
zend_restore_error_handling(&zeh);
if (!EG(exception)) {
zend_throw_exception(NULL, "Constructor failed", 0);
}
}
RETURN_FALSE;
}
if (object) {
zend_restore_error_handling(&zeh);
FILEINFO_REGISTER_OBJECT(object, finfo);
} else {
RETURN_RES(zend_register_resource(finfo, le_fileinfo));
}
}
/* }}} */
/* {{{ proto resource finfo_close(resource finfo)
Close fileinfo resource. */
PHP_FUNCTION(finfo_close)
{
php_fileinfo *finfo;
zval *zfinfo;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "r", &zfinfo) == FAILURE) {
RETURN_FALSE;
}
if ((finfo = (php_fileinfo *)zend_fetch_resource(Z_RES_P(zfinfo), "file_info", le_fileinfo)) == NULL) {
RETURN_FALSE;
}
zend_list_close(Z_RES_P(zfinfo));
RETURN_TRUE;
}
/* }}} */
/* {{{ proto bool finfo_set_flags(resource finfo, int options)
Set libmagic configuration options. */
PHP_FUNCTION(finfo_set_flags)
{
zend_long options;
php_fileinfo *finfo;
zval *zfinfo;
FILEINFO_DECLARE_INIT_OBJECT(object)
if (object) {
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &options) == FAILURE) {
RETURN_FALSE;
}
FILEINFO_FROM_OBJECT(finfo, object);
} else {
if (zend_parse_parameters(ZEND_NUM_ARGS(), "rl", &zfinfo, &options) == FAILURE) {
RETURN_FALSE;
}
if ((finfo = (php_fileinfo *)zend_fetch_resource(Z_RES_P(zfinfo), "file_info", le_fileinfo)) == NULL) {
RETURN_FALSE;
}
}
FINFO_SET_OPTION(finfo->magic, options)
finfo->options = options;
RETURN_TRUE;
}
/* }}} */
#define FILEINFO_MODE_BUFFER 0
#define FILEINFO_MODE_STREAM 1
#define FILEINFO_MODE_FILE 2
static void _php_finfo_get_type(INTERNAL_FUNCTION_PARAMETERS, int mode, int mimetype_emu) /* {{{ */
{
zend_long options = 0;
char *ret_val = NULL, *buffer = NULL;
size_t buffer_len;
php_fileinfo *finfo = NULL;
zval *zfinfo, *zcontext = NULL;
zval *what;
char mime_directory[] = "directory";
struct magic_set *magic = NULL;
FILEINFO_DECLARE_INIT_OBJECT(object)
if (mimetype_emu) {
/* mime_content_type(..) emulation */
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &what) == FAILURE) {
return;
}
switch (Z_TYPE_P(what)) {
case IS_STRING:
buffer = Z_STRVAL_P(what);
buffer_len = Z_STRLEN_P(what);
mode = FILEINFO_MODE_FILE;
break;
case IS_RESOURCE:
mode = FILEINFO_MODE_STREAM;
break;
default:
php_error_docref(NULL, E_WARNING, "Can only process string or stream arguments");
RETURN_FALSE;
}
magic = magic_open(MAGIC_MIME_TYPE);
if (magic_load(magic, NULL) == -1) {
php_error_docref(NULL, E_WARNING, "Failed to load magic database.");
goto common;
}
} else if (object) {
if (zend_parse_parameters(ZEND_NUM_ARGS(), "s|lr", &buffer, &buffer_len, &options, &zcontext) == FAILURE) {
RETURN_FALSE;
}
FILEINFO_FROM_OBJECT(finfo, object);
magic = finfo->magic;
} else {
if (zend_parse_parameters(ZEND_NUM_ARGS(), "rs|lr", &zfinfo, &buffer, &buffer_len, &options, &zcontext) == FAILURE) {
RETURN_FALSE;
}
if ((finfo = (php_fileinfo *)zend_fetch_resource(Z_RES_P(zfinfo), "file_info", le_fileinfo)) == NULL) {
RETURN_FALSE;
}
magic = finfo->magic;
}
/* Set options for the current file/buffer. */
if (options) {
FINFO_SET_OPTION(magic, options)
}
switch (mode) {
case FILEINFO_MODE_BUFFER:
{
ret_val = (char *) magic_buffer(magic, buffer, buffer_len);
break;
}
case FILEINFO_MODE_STREAM:
{
php_stream *stream;
zend_off_t streampos;
php_stream_from_zval_no_verify(stream, what);
if (!stream) {
goto common;
}
streampos = php_stream_tell(stream); /* remember stream position for restoration */
php_stream_seek(stream, 0, SEEK_SET);
ret_val = (char *) magic_stream(magic, stream);
php_stream_seek(stream, streampos, SEEK_SET);
break;
}
case FILEINFO_MODE_FILE:
{
/* determine if the file is a local file or remote URL */
const char *tmp2;
php_stream_wrapper *wrap;
php_stream_statbuf ssb;
if (buffer == NULL || !*buffer) {
php_error_docref(NULL, E_WARNING, "Empty filename or path");
RETVAL_FALSE;
goto clean;
}
if (CHECK_NULL_PATH(buffer, buffer_len)) {
php_error_docref(NULL, E_WARNING, "Invalid path");
RETVAL_FALSE;
goto clean;
}
wrap = php_stream_locate_url_wrapper(buffer, &tmp2, 0);
if (wrap) {
php_stream *stream;
php_stream_context *context = php_stream_context_from_zval(zcontext, 0);
#ifdef PHP_WIN32
if (php_stream_stat_path_ex(buffer, 0, &ssb, context) == SUCCESS) {
if (ssb.sb.st_mode & S_IFDIR) {
ret_val = mime_directory;
goto common;
}
}
#endif
stream = php_stream_open_wrapper_ex(buffer, "rb", REPORT_ERRORS, NULL, context);
if (!stream) {
RETVAL_FALSE;
goto clean;
}
if (php_stream_stat(stream, &ssb) == SUCCESS) {
if (ssb.sb.st_mode & S_IFDIR) {
ret_val = mime_directory;
} else {
ret_val = (char *)magic_stream(magic, stream);
}
}
php_stream_close(stream);
}
break;
}
default:
php_error_docref(NULL, E_WARNING, "Can only process string or stream arguments");
}
common:
if (ret_val) {
RETVAL_STRING(ret_val);
} else {
php_error_docref(NULL, E_WARNING, "Failed identify data %d:%s", magic_errno(magic), magic_error(magic));
RETVAL_FALSE;
}
clean:
if (mimetype_emu) {
magic_close(magic);
}
/* Restore options */
if (options) {
FINFO_SET_OPTION(magic, finfo->options)
}
return;
}
/* }}} */
/* {{{ proto string finfo_file(resource finfo, char *file_name [, int options [, resource context]])
Return information about a file. */
PHP_FUNCTION(finfo_file)
{
_php_finfo_get_type(INTERNAL_FUNCTION_PARAM_PASSTHRU, FILEINFO_MODE_FILE, 0);
}
/* }}} */
/* {{{ proto string finfo_buffer(resource finfo, char *string [, int options [, resource context]])
Return infromation about a string buffer. */
PHP_FUNCTION(finfo_buffer)
{
_php_finfo_get_type(INTERNAL_FUNCTION_PARAM_PASSTHRU, FILEINFO_MODE_BUFFER, 0);
}
/* }}} */
/* {{{ proto string mime_content_type(string filename|resource stream)
Return content-type for file */
PHP_FUNCTION(mime_content_type)
{
_php_finfo_get_type(INTERNAL_FUNCTION_PARAM_PASSTHRU, -1, 1);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
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