all: sync with master

internal/aghos/os_windows.go

@@ -3,13 +3,29 @@
 package aghos
 
 import (
+	"io/fs"
 	"os"
 	"os/signal"
+	"path/filepath"
 	"syscall"
 
+	"github.com/AdguardTeam/golibs/log"
 	"golang.org/x/sys/windows"
 )
 
+func rootDirFS() (fsys fs.FS) {
+	// TODO(a.garipov): Use a better way if golang/go#44279 is ever resolved.
+	sysDir, err := windows.GetSystemDirectory()
+	if err != nil {
+		log.Error("aghos: getting root filesystem: %s; using C:", err)
+
+		// Assume that C: is the safe default.
+		return os.DirFS("C:")
+	}
+
+	return os.DirFS(filepath.VolumeName(sysDir))
+}
+
 func setRlimit(val uint64) (err error) {
 	return Unsupported("setrlimit")
 }