[client, management] auto-update (#4732)

client/ui/update_windows.go

@@ -0,0 +1,44 @@
+//go:build windows
+
+package main
+
+import (
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/sys/windows"
+
+	nbprocess "github.com/netbirdio/netbird/client/ui/process"
+)
+
+// killParentUIProcess finds and kills the parent systray UI process on Windows.
+// This is a workaround in case the MSI installer fails to properly terminate the UI process.
+// The installer should handle this via util:CloseApplication with TerminateProcess, but this
+// provides an additional safety mechanism to ensure the UI is closed before the upgrade proceeds.
+func killParentUIProcess() {
+	pid, running, err := nbprocess.IsAnotherProcessRunning()
+	if err != nil {
+		log.Warnf("failed to check for parent UI process: %v", err)
+		return
+	}
+
+	if !running {
+		log.Debug("no parent UI process found to kill")
+		return
+	}
+
+	log.Infof("killing parent UI process (PID: %d)", pid)
+
+	// Open the process with terminate rights
+	handle, err := windows.OpenProcess(windows.PROCESS_TERMINATE, false, uint32(pid))
+	if err != nil {
+		log.Warnf("failed to open parent process %d: %v", pid, err)
+		return
+	}
+	defer func() {
+		_ = windows.CloseHandle(handle)
+	}()
+
+	// Terminate the process with exit code 0
+	if err := windows.TerminateProcess(handle, 0); err != nil {
+		log.Warnf("failed to terminate parent process %d: %v", pid, err)
+	}
+}