Windows: issue a warning for PWSH/cmd term only in W10

Do not issue the warning over PowerShell or cmd legacy terminal emulators
in Windows 11. In Window the check doesn't work, because the process
tree is different - the Windows Terminal doesn't have its own process
and it is uv.exe->powershell.exe->exporer.exe.

This improves commit bb2a72f.

src/host.cpp

@@ -462,10 +462,11 @@ struct init_data *common_preinit(int argc, char *argv[])
         }
 
         // warn in W10 "legacy" terminal emulators
-        if ((win_has_ancestor_process("powershell.exe") ||
+        if (getenv("TERM") == nullptr &&
+            get_windows_build() < BUILD_WINDOWS_11_OR_LATER &&
+            (win_has_ancestor_process("powershell.exe") ||
              win_has_ancestor_process("cmd.exe")) &&
-            !win_has_ancestor_process("WindowsTerminal.exe") &&
-            getenv("TERM") == nullptr) {
+            !win_has_ancestor_process("WindowsTerminal.exe")) {
                 MSG(WARNING, "Running inside PS/cmd terminal is not recommended "
                              "because scrolling the output freezes the process, "
                              "consider using Windows Terminal instead!\n");

src/utils/windows.c

@@ -37,6 +37,7 @@
 
 #ifdef _WIN32
 #include <audioclient.h>
+#include <ntstatus.h>
 #include <objbase.h>
 #include <tlhelp32.h>
 #include <vfwmsgs.h>
@@ -239,6 +240,37 @@ win_has_ancestor_process(const char *name)
         return false;
 }
 
+unsigned long
+get_windows_build()
+{
+        RTL_OSVERSIONINFOW osVersionInfo = { .dwOSVersionInfoSize =
+                                                 sizeof(RTL_OSVERSIONINFOW) };
+
+        HMODULE hNtDll = GetModuleHandleW(L"ntdll.dll");
+        if (hNtDll == NULL) {
+                MSG(VERBOSE, "Cannot load ntdll.dll!\n");
+                return 0;
+        }
+
+        typedef NTSTATUS(WINAPI * RtlGetVersionFunc)(
+            PRTL_OSVERSIONINFOW lpVersionInformation);
+        RtlGetVersionFunc pRtlGetVersion =
+            (RtlGetVersionFunc) GetProcAddress(hNtDll, "RtlGetVersion");
+        if (pRtlGetVersion == NULL) {
+                MSG(VERBOSE, "Cannot get RtlGetVersion from ntdll.dll!\n");
+                return 0;
+        }
+
+        if (pRtlGetVersion(&osVersionInfo) != STATUS_SUCCESS) {
+                MSG(VERBOSE, "Cannot get Windows version nfo!\n");
+                return 0;
+        }
+        MSG(DEBUG, "Windows version: %lu.%lu (build %lu)\n",
+            osVersionInfo.dwMajorVersion, osVersionInfo.dwMinorVersion,
+            osVersionInfo.dwBuildNumber);
+        return osVersionInfo.dwBuildNumber;
+}
+
 #endif // defined _WIN32
 
 /* vim: set expandtab sw=8 tw=120: */

src/utils/windows.h

@@ -42,6 +42,10 @@
 #include <stdbool.h>
 #endif
 
+enum {
+        BUILD_WINDOWS_11_OR_LATER = 22000,
+};
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -86,6 +90,7 @@ const char *hresult_to_str(HRESULT res);
 const char *get_win32_error(DWORD error);
 const char *win_wstr_to_str(const wchar_t *wstr);
 bool win_has_ancestor_process(const char *name);
+unsigned long get_windows_build(void);
 #endif // defined _WIN32
 
 #ifdef __cplusplus