27 lines
768 B
Dart
27 lines
768 B
Dart
import 'dart:ffi';
|
|
import 'dart:io';
|
|
|
|
import 'package:ffi/ffi.dart';
|
|
|
|
/// 通过 Win32 SetEnvironmentVariableW 设置/清除进程环境变量
|
|
/// 仅 Windows 有效，其他平台直接返回 false
|
|
bool winSetEnvVar(String name, String? value) {
|
|
if (!Platform.isWindows) return false;
|
|
|
|
final dylib = DynamicLibrary.open('kernel32.dll');
|
|
final fn = dylib.lookupFunction<
|
|
Int32 Function(Pointer<Utf16>, Pointer<Utf16>),
|
|
int Function(Pointer<Utf16>, Pointer<Utf16>)>(
|
|
'SetEnvironmentVariableW',
|
|
);
|
|
|
|
final namePtr = name.toNativeUtf16();
|
|
final valuePtr = value != null ? value.toNativeUtf16() : nullptr;
|
|
try {
|
|
return fn(namePtr, valuePtr) != 0;
|
|
} finally {
|
|
calloc.free(namePtr);
|
|
if (value != null) calloc.free(valuePtr);
|
|
}
|
|
}
|