go-worm/lib/instance/launch_windows.go

//go:build windows

package instance

import (
	"os"
	"os/exec"
	"syscall"

	"golang.org/x/sys/windows"
)

// Launch starts exe detached with no visible window. DETACHED_PROCESS keeps
// the child alive after the parent (e.g. a scheduled task) exits.
func Launch(exe string, args []string) error {
	nul, err := os.OpenFile("NUL", os.O_RDWR, 0)
	if err != nil {
		return err
	}
	defer nul.Close()

	cmd := exec.Command(exe, args...)
	cmd.Stdin = nul
	cmd.Stdout = nul
	cmd.Stderr = nul
	cmd.SysProcAttr = &syscall.SysProcAttr{
		HideWindow: true,
		CreationFlags: windows.CREATE_NO_WINDOW |
			windows.CREATE_NEW_PROCESS_GROUP |
			windows.DETACHED_PROCESS,
	}
	if err := cmd.Start(); err != nil {
		return err
	}
	return cmd.Process.Release()
}

// RestartSelf launches a fresh agent process (no mutex check).
func RestartSelf() error {
	exe, err := os.Executable()
	if err != nil {
		return err
	}
	return Launch(exe, nil)
}