chore: import upstream snapshot with attribution

integration-tests/go-sql-server-driver/driver/cmd_unix.go

@@ -0,0 +1,41 @@
+// Copyright 2024 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package driver
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func ApplyCmdAttributes(cmd *exec.Cmd) {
+	// nothing to do on unix / darwin
+}
+
+func (s *SqlServer) GracefulStop() error {
+	select {
+	case <-s.Done:
+		return s.CmdWaitErr
+	default:
+	}
+	err := s.Cmd.Process.Signal(syscall.SIGTERM)
+	if err != nil {
+		return err
+	}
+	<-s.Done
+	return s.CmdWaitErr
+}