talk/internal/daemon/spawn_windows.go

//go:build windows

package daemon

import (
	"os/exec"
	"syscall"
)

// detachedProcess is the Win32 flag DETACHED_PROCESS: no console window, no
// binding to the caller's console.
const detachedProcess = 0x00000008

// createBreakawayFromJob is the Win32 flag CREATE_BREAKAWAY_FROM_JOB: the
// child leaves the parent's job object, so a session-bound job (WinRM, SSH,
// CI) does not take the daemon down with it. Only works when the job allows
// it; Spawn falls back to a start without the flag otherwise.
const createBreakawayFromJob = 0x01000000

// detach detaches the child from the console: own process group (no Ctrl-C
// from the shell) and no console (no flashing window).
func detach(cmd *exec.Cmd, breakaway bool) {
	flags := uint32(syscall.CREATE_NEW_PROCESS_GROUP | detachedProcess)
	if breakaway {
		flags |= createBreakawayFromJob
	}
	cmd.SysProcAttr = &syscall.SysProcAttr{CreationFlags: flags}
}