fix as per review

request-example.go

@@ -469,7 +469,7 @@ func (fs *root) Realpath(p string) string {
 	if fs.startDirectory == "" || fs.startDirectory == "/" {
 		return cleanPath(p)
 	}
-	return cleanPathWithBase(p, fs.startDirectory)
+	return cleanPathWithBase(fs.startDirectory, p)
 }
 
 // In memory file-system-y thing that the Hanlders live on

request-interfaces.go

@@ -86,13 +86,13 @@ type LstatFileLister interface {
 	Lstat(*Request) (ListerAt, error)
 }
 
-// RealpathFileLister is a FileLister that implements the Realpath method.
+// RealPathFileLister is a FileLister that implements the Realpath method.
 // We use "/" as start directory for relative paths, implementing this
 // interface you can customize the start directory.
 // You have to return an absolute POSIX path.
-type RealpathFileLister interface {
+type RealPathFileLister interface {
 	FileLister
-	Realpath(string) string
+	RealPath(string) string
 }
 
 // ListerAt does for file lists what io.ReaderAt does for files.

request-server.go

@@ -199,8 +199,8 @@ func (rs *RequestServer) packetWorker(
 			rpkt = statusFromError(pkt.ID, rs.closeRequest(handle))
 		case *sshFxpRealpathPacket:
 			var realPath string
-			if realPather, ok := rs.Handlers.FileList.(RealpathFileLister); ok {
-				realPath = realPather.Realpath(pkt.getPath())
+			if realPather, ok := rs.Handlers.FileList.(RealPathFileLister); ok {
+				realPath = realPather.RealPath(pkt.getPath())
 			} else {
 				realPath = cleanPath(pkt.getPath())
 			}
@@ -284,10 +284,10 @@ func cleanPacketPath(pkt *sshFxpRealpathPacket, realPath string) responsePacket
 
 // Makes sure we have a clean POSIX (/) absolute path to work with
 func cleanPath(p string) string {
-	return cleanPathWithBase(p, "/")
+	return cleanPathWithBase("/", p)
 }
 
-func cleanPathWithBase(p, base string) string {
+func cleanPathWithBase(base, p string) string {
 	p = filepath.ToSlash(p)
 	if !path.IsAbs(p) {
 		return path.Join(base, p)

request-server_test.go

@@ -816,15 +816,15 @@ func TestRealPath(t *testing.T) {
 	}
 
 	p := root.Realpath(".")
-	require.Equal(t, root.startDirectory, p)
+	assert.Equal(t, root.startDirectory, p)
 	p = root.Realpath("/")
-	require.Equal(t, "/", p)
+	assert.Equal(t, "/", p)
 	p = root.Realpath("..")
-	require.Equal(t, "/", p)
+	assert.Equal(t, "/", p)
 	p = root.Realpath("../../..")
-	require.Equal(t, "/", p)
+	assert.Equal(t, "/", p)
 	p = root.Realpath("relpath")
-	require.Equal(t, path.Join(root.startDirectory, "relpath"), p)
+	assert.Equal(t, path.Join(root.startDirectory, "relpath"), p)
 }
 
 func TestCleanPath(t *testing.T) {