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/*!A cross-platform build utility based on Lua
*
* Licensed 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.
*
* Copyright (C) 2015-present, TBOOX Open Source Group.
*
* @author TitanSnow, ruki
* @file registry_query.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "registry_query"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* types
*/
// the RegGetValueA func type
typedef BOOL (WINAPI* xm_RegGetValueA_t)(HKEY hkey, LPCSTR lpSubKey, LPCSTR lpValue, DWORD dwFlags, LPDWORD pdwType, PVOID pvData, LPDWORD pcbData);
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
/* query registry
*
* local value, errors = winos.registry_query("HKEY_LOCAL_MACHINE", "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\AeDebug", "Debugger")
*/
tb_int_t xm_winos_registry_query(lua_State* lua)
{
// check
tb_assert_and_check_return_val(lua, 0);
// get the arguments
tb_char_t const* rootkey = luaL_checkstring(lua, 1);
tb_char_t const* rootdir = luaL_checkstring(lua, 2);
tb_char_t const* valuename = luaL_checkstring(lua, 3);
tb_check_return_val(rootkey && rootdir && valuename, 0);
// query key-value
tb_bool_t ok = tb_false;
HKEY key = tb_null;
HKEY keynew = tb_null;
tb_char_t* value = tb_null;
do
{
// get registry rootkey
if (!tb_strcmp(rootkey, "HKEY_CLASSES_ROOT")) key = HKEY_CLASSES_ROOT;
else if (!tb_strcmp(rootkey, "HKEY_CURRENT_CONFIG")) key = HKEY_CURRENT_CONFIG;
else if (!tb_strcmp(rootkey, "HKEY_CURRENT_USER")) key = HKEY_CURRENT_USER;
else if (!tb_strcmp(rootkey, "HKEY_LOCAL_MACHINE")) key = HKEY_LOCAL_MACHINE;
else if (!tb_strcmp(rootkey, "HKEY_USERS")) key = HKEY_USERS;
else
{
lua_pushnil(lua);
lua_pushfstring(lua, "invalid registry rootkey: %s", rootkey);
break;
}
// attempt to load RegGetValueA
static xm_RegGetValueA_t s_RegGetValueA = tb_null;
if (!s_RegGetValueA)
{
// load the advapi32 module
tb_dynamic_ref_t module = (tb_dynamic_ref_t)GetModuleHandleA("advapi32.dll");
if (!module) module = tb_dynamic_init("advapi32.dll");
if (module) s_RegGetValueA = (xm_RegGetValueA_t)tb_dynamic_func(module, "RegGetValueA");
}
// get registry value
DWORD type = 0;
if (s_RegGetValueA)
{
// get registry value size
DWORD valuesize = 0;
if (s_RegGetValueA(key, rootdir, valuename, RRF_RT_ANY, 0, tb_null, &valuesize) != ERROR_SUCCESS)
{
lua_pushnil(lua);
lua_pushfstring(lua, "get registry value size failed: %s\\%s;%s", rootkey, rootdir, valuename);
break;
}
// make value buffer
value = (tb_char_t*)tb_malloc0(valuesize + 1);
tb_assert_and_check_break(value);
// get value result, we attempt to do not expand value if get failed
type = 0;
if (s_RegGetValueA(key, rootdir, valuename, RRF_RT_ANY, &type, (PVOID)value, &valuesize) != ERROR_SUCCESS &&
s_RegGetValueA(key, rootdir, valuename, RRF_RT_ANY | RRF_NOEXPAND, &type, (PVOID)value, &valuesize) != ERROR_SUCCESS)
{
lua_pushnil(lua);
lua_pushfstring(lua, "get registry value failed: %s\\%s;%s", rootkey, rootdir, valuename);
break;
}
}
else
{
// open registry key
if (RegOpenKeyExA(key, rootdir, 0, KEY_QUERY_VALUE, &keynew) != ERROR_SUCCESS && keynew)
{
lua_pushnil(lua);
lua_pushfstring(lua, "open registry key failed: %s\\%s", rootkey, rootdir);
break;
}
// get registry value size
DWORD valuesize = 0;
if (RegQueryValueExA(keynew, valuename, tb_null, tb_null, tb_null, &valuesize) != ERROR_SUCCESS)
{
lua_pushnil(lua);
lua_pushfstring(lua, "get registry value size failed: %s\\%s;%s", rootkey, rootdir, valuename);
break;
}
// make value buffer
value = (tb_char_t*)tb_malloc0(valuesize + 1);
tb_assert_and_check_break(value);
// get value result
type = 0;
if (RegQueryValueExA(keynew, valuename, tb_null, &type, (LPBYTE)value, &valuesize) != ERROR_SUCCESS)
{
lua_pushnil(lua);
lua_pushfstring(lua, "get registry value failed: %s\\%s;%s", rootkey, rootdir, valuename);
break;
}
}
// save result
switch (type)
{
case REG_SZ:
case REG_EXPAND_SZ:
lua_pushstring(lua, value);
ok = tb_true;
break;
case REG_DWORD:
lua_pushfstring(lua, "%d", *((tb_int_t*)value));
ok = tb_true;
break;
case REG_QWORD:
lua_pushfstring(lua, "%lld", *((tb_int64_t*)value));
ok = tb_true;
break;
default:
lua_pushnil(lua);
lua_pushfstring(lua, "unsupported registry value type: %d", type);
break;
}
} while (0);
// exit registry key
if (keynew)
RegCloseKey(keynew);
keynew = tb_null;
// exit value
if (value) tb_free(value);
value = tb_null;
// ok?
return ok? 1 : 2;
}
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