move SFTPGo package to the internal folder

SFTPGo is a daemon and command line tool, not a library.

The public API are provided by the SDK

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

internal/sftpd/internal_unix_test.go

@@ -0,0 +1,32 @@
+// Copyright (C) 2019-2022  Nicola Murino
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+//go:build !windows
+// +build !windows
+
+package sftpd
+
+import (
+	"os/exec"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestWrapCmd(t *testing.T) {
+	cmd := exec.Command("ls")
+	cmd = wrapCmd(cmd, 1000, 1001)
+	assert.Equal(t, uint32(1000), cmd.SysProcAttr.Credential.Uid)
+	assert.Equal(t, uint32(1001), cmd.SysProcAttr.Credential.Gid)
+}