mirror of
https://github.com/fastfetch-cli/fastfetch.git
synced 2026-09-13 02:42:09 +02:00
李通洲
321 lines
9.8 KiB
C++
321 lines
9.8 KiB
C++
#include "wmi.hpp"
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#include <synchapi.h>
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#include <wchar.h>
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#include <math.h>
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namespace
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{
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// Provide our bstr_t to avoid libstdc++ dependency
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struct bstr_t
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{
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explicit bstr_t(const wchar_t* str) noexcept: _bstr(SysAllocString(str)) {}
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~bstr_t() noexcept { SysFreeString(_bstr); }
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explicit operator const wchar_t*() const noexcept { return _bstr; }
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operator BSTR() const noexcept { return _bstr; }
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private:
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BSTR _bstr;
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};
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}
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//https://learn.microsoft.com/en-us/windows/win32/wmisdk/example--getting-wmi-data-from-the-local-computer
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//https://learn.microsoft.com/en-us/windows/win32/cimwin32prov/computer-system-hardware-classes
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static void CoUninitializeWrap()
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{
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CoUninitialize();
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}
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static BOOL CALLBACK InitHandleFunction(PINIT_ONCE, PVOID, PVOID *lpContext)
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{
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HRESULT hres;
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// Initialize COM
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hres = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
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// Set general COM security levels
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hres = CoInitializeSecurity(
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nullptr,
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-1, // COM authentication
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nullptr, // Authentication services
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nullptr, // Reserved
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RPC_C_AUTHN_LEVEL_DEFAULT, // Default authentication
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RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation
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nullptr, // Authentication info
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EOAC_NONE, // Additional capabilities
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nullptr // Reserved
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);
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if (FAILED(hres))
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{
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CoUninitialize();
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*((const char**)lpContext) = "Failed to initialize security";
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return FALSE;
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}
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// Obtain the initial locator to WMI
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IWbemLocator* pLoc = nullptr;
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hres = CoCreateInstance(
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CLSID_WbemLocator,
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nullptr,
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CLSCTX_INPROC_SERVER,
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IID_IWbemLocator,
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(LPVOID*) &pLoc);
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if (FAILED(hres))
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{
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CoUninitialize();
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*((const char**)lpContext) = "Failed to create IWbemLocator object";
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return FALSE;
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}
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// Connect to WMI through the IWbemLocator::ConnectServer method
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IWbemServices* pSvc = nullptr;
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// Connect to the root\cimv2 namespace with
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// the current user and obtain pointer pSvc
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// to make IWbemServices calls.
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hres = pLoc->ConnectServer(
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bstr_t(L"ROOT\\CIMV2"), // Object path of WMI namespace
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nullptr, // User name. nullptr = current user
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nullptr, // User password. nullptr = current
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0, // Locale. nullptr indicates current
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0, // Security flags.
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0, // Authority (for example, Kerberos)
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0, // Context object
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&pSvc // pointer to IWbemServices proxy
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);
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pLoc->Release();
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pLoc = nullptr;
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if (FAILED(hres))
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{
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CoUninitialize();
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*((const char**)lpContext) = "Could not connect WMI server";
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return FALSE;
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}
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// Set security levels on the proxy -------------------------
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hres = CoSetProxyBlanket(
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pSvc, // Indicates the proxy to set
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RPC_C_AUTHN_WINNT, // RPC_C_AUTHN_xxx
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RPC_C_AUTHZ_NONE, // RPC_C_AUTHZ_xxx
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nullptr, // Server principal name
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RPC_C_AUTHN_LEVEL_CALL, // RPC_C_AUTHN_LEVEL_xxx
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RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
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nullptr, // client identity
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EOAC_NONE // proxy capabilities
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);
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if (FAILED(hres))
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{
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pSvc->Release();
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CoUninitialize();
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*((const char**)lpContext) = "Could not set proxy blanket";
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return FALSE;
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}
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*((IWbemServices**)lpContext) = pSvc;
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atexit(CoUninitializeWrap);
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return TRUE;
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}
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FFWmiQuery::FFWmiQuery(const wchar_t* queryStr, FFstrbuf* error)
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: pEnumerator(nullptr)
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{
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static INIT_ONCE s_InitOnce = INIT_ONCE_STATIC_INIT;
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const char* context;
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if (InitOnceExecuteOnce(&s_InitOnce, &InitHandleFunction, nullptr, (void**)&context) == FALSE)
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{
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if(error)
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ffStrbufInitS(error, context);
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return;
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}
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// Use the IWbemServices pointer to make requests of WMI
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HRESULT hres;
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hres = ((IWbemServices*)context)->ExecQuery(
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bstr_t(L"WQL"),
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bstr_t(queryStr),
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WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
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nullptr,
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&pEnumerator);
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if (FAILED(hres))
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{
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if(error)
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ffStrbufAppendF(error, "Query for '%ls' failed. Error code = 0x%lX", queryStr, hres);
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}
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}
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static void ffBstrToStrbuf(BSTR bstr, FFstrbuf* strbuf)
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{
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int len = (int)SysStringLen(bstr);
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if(len <= 0)
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{
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ffStrbufClear(strbuf);
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return;
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}
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int size_needed = WideCharToMultiByte(CP_UTF8, 0, bstr, len, nullptr, 0, nullptr, nullptr);
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ffStrbufEnsureFree(strbuf, (uint32_t)size_needed);
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WideCharToMultiByte(CP_UTF8, 0, bstr, len, strbuf->chars, size_needed, nullptr, nullptr);
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strbuf->length = (uint32_t)size_needed;
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strbuf->chars[size_needed] = '\0';
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}
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bool FFWmiRecord::getString(const wchar_t* key, FFstrbuf* strbuf)
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{
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bool result = true;
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VARIANT vtProp;
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VariantInit(&vtProp);
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CIMTYPE type;
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if(FAILED(obj->Get(key, 0, &vtProp, &type, nullptr)) || vtProp.vt != VT_BSTR)
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{
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result = false;
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}
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else
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{
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switch(vtProp.vt)
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{
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case VT_BSTR:
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if(type == CIM_DATETIME)
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{
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ISWbemDateTime *pDateTime;
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BSTR dateStr;
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if(FAILED(CoCreateInstance(__uuidof(SWbemDateTime), 0, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pDateTime))))
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result = false;
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else if(FAILED(pDateTime->put_Value(vtProp.bstrVal)))
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result = false;
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else if(FAILED(pDateTime->GetFileTime(VARIANT_TRUE, &dateStr)))
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result = false;
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else
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ffBstrToStrbuf(dateStr, strbuf);
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}
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else
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{
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ffBstrToStrbuf(vtProp.bstrVal, strbuf);
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}
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break;
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case VT_LPSTR:
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ffStrbufAppendS(strbuf, vtProp.pcVal);
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break;
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case VT_LPWSTR: // TODO
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default:
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result = false;
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break;
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}
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}
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VariantClear(&vtProp);
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return result;
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}
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bool FFWmiRecord::getSigned(const wchar_t* key, int64_t* integer)
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{
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bool result = true;
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VARIANT vtProp;
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VariantInit(&vtProp);
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CIMTYPE type;
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if(FAILED(obj->Get(key, 0, &vtProp, &type, nullptr)))
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{
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result = false;
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}
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else
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{
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switch(vtProp.vt)
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{
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case VT_BSTR: *integer = wcstoll(vtProp.bstrVal, nullptr, 10); break;
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case VT_I1: *integer = vtProp.cVal; break;
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case VT_I2: *integer = vtProp.iVal; break;
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case VT_INT:
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case VT_I4: *integer = vtProp.intVal; break;
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case VT_I8: *integer = vtProp.llVal; break;
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case VT_UI1: *integer = (int64_t)vtProp.bVal; break;
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case VT_UI2: *integer = (int64_t)vtProp.uiVal; break;
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case VT_UINT:
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case VT_UI4: *integer = (int64_t)vtProp.uintVal; break;
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case VT_UI8: *integer = (int64_t)vtProp.ullVal; break;
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case VT_BOOL: *integer = vtProp.boolVal != VARIANT_FALSE; break;
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default: *integer = 0; result = false;
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}
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}
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VariantClear(&vtProp);
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return result;
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}
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bool FFWmiRecord::getUnsigned(const wchar_t* key, uint64_t* integer)
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{
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bool result = true;
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VARIANT vtProp;
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VariantInit(&vtProp);
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if(FAILED(obj->Get(key, 0, &vtProp, nullptr, nullptr)))
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{
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result = false;
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}
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else
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{
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switch(vtProp.vt)
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{
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case VT_BSTR: *integer = wcstoull(vtProp.bstrVal, nullptr, 10); break;
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case VT_I1: *integer = (uint64_t)vtProp.cVal; break;
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case VT_I2: *integer = (uint64_t)vtProp.iVal; break;
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case VT_INT:
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case VT_I4: *integer = (uint64_t)vtProp.intVal; break;
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case VT_I8: *integer = (uint64_t)vtProp.llVal; break;
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case VT_UI1: *integer = vtProp.bVal; break;
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case VT_UI2: *integer = vtProp.uiVal; break;
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case VT_UINT:
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case VT_UI4: *integer = vtProp.uintVal; break;
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case VT_UI8: *integer = vtProp.ullVal; break;
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case VT_BOOL: *integer = vtProp.boolVal != VARIANT_FALSE; break;
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default: *integer = 0; result = false;
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}
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}
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VariantClear(&vtProp);
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return result;
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}
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bool FFWmiRecord::getReal(const wchar_t* key, double* real)
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{
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bool result = true;
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VARIANT vtProp;
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VariantInit(&vtProp);
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if(FAILED(obj->Get(key, 0, &vtProp, nullptr, nullptr)))
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{
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result = false;
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}
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else
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{
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switch(vtProp.vt)
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{
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case VT_BSTR: *real = wcstod(vtProp.bstrVal, nullptr); break;
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case VT_I1: *real = vtProp.cVal; break;
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case VT_I2: *real = vtProp.iVal; break;
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case VT_INT:
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case VT_I4: *real = vtProp.intVal; break;
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case VT_I8: *real = (double)vtProp.llVal; break;
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case VT_UI1: *real = vtProp.bVal; break;
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case VT_UI2: *real = vtProp.uiVal; break;
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case VT_UINT:
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case VT_UI4: *real = vtProp.uintVal; break;
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case VT_UI8: *real = (double)vtProp.ullVal; break;
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case VT_R4: *real = vtProp.fltVal; break;
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case VT_R8: *real = vtProp.dblVal; break;
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case VT_BOOL: *real = vtProp.boolVal != VARIANT_FALSE; break;
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default: *real = NAN; result = false;
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}
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}
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VariantClear(&vtProp);
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return result;
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}
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