Function startSubprocess

tailnet/test/integration/integration_test.go:409–414

startSubprocess launches the test binary with the same flags as the test, but with additional flags added. See integration.ExecBackground for more details.

(t *testing.T, processName string, netNS *os.File, flags []string)

//
// See integration.ExecBackground for more details.
func startSubprocess(t *testing.T, processName string, netNS *os.File, flags []string) (<-chan error, func() error) {
	name := os.Args[0]
	// Always use verbose mode since it gets piped to the parent test anyways.
	args := append(os.Args[1:], append([]string{"-test.v=true"}, flags...)...) //nolint:gocritic
	return integration.ExecBackground(t, processName, netNS, name, args)
}

func writeDERPMapToFile(path string, derpMap *tailcfg.DERPMap) error {
	f, err := os.Create(path)