[bugfix] Windows paths don’t work with Server

request-plan9.go

@@ -2,7 +2,11 @@
 
 package sftp
 
-import "syscall"
+import (
+	"path"
+	"path/filepath"
+	"syscall"
+)
 
 func fakeFileInfoSys() interface{} {
 	return &syscall.Dir{}
@@ -11,3 +15,20 @@ func fakeFileInfoSys() interface{} {
 func testOsSys(sys interface{}) error {
 	return nil
 }
+
+func toLocalPath(p string) string {
+	lp := filepath.FromSlash(p)
+
+	if path.IsAbs(p) {
+		tmp := lp[1:]
+
+		if filepath.IsAbs(tmp) {
+			// If the FromSlash without any starting slashes is absolute,
+			// then we have a filepath encoded with a prefix '/'.
+			// e.g. "/#s/boot" to "#s/boot"
+			return tmp
+		}
+	}
+
+	return lp
+}

request-server.go

@@ -288,9 +288,9 @@ func cleanPath(p string) string {
 }
 
 func cleanPathWithBase(base, p string) string {
-	p = filepath.ToSlash(p)
+	p = filepath.ToSlash(filepath.Clean(p))
 	if !path.IsAbs(p) {
 		return path.Join(base, p)
 	}
-	return path.Clean(p)
+	return p
 }

request-unix.go

@@ -21,3 +21,7 @@ func testOsSys(sys interface{}) error {
 	}
 	return nil
 }
+
+func toLocalPath(p string) string {
+	return p
+}

request_windows.go

@@ -1,6 +1,10 @@
 package sftp
 
-import "syscall"
+import (
+	"path"
+	"path/filepath"
+	"syscall"
+)
 
 func fakeFileInfoSys() interface{} {
 	return syscall.Win32FileAttributeData{}
@@ -9,3 +13,32 @@ func fakeFileInfoSys() interface{} {
 func testOsSys(sys interface{}) error {
 	return nil
 }
+
+func toLocalPath(p string) string {
+	lp := filepath.FromSlash(p)
+
+	if path.IsAbs(p) {
+		tmp := lp
+		for len(tmp) > 0 && tmp[0] == '\\' {
+			tmp = tmp[1:]
+		}
+
+		if filepath.IsAbs(tmp) {
+			// If the FromSlash without any starting slashes is absolute,
+			// then we have a filepath encoded with a prefix '/'.
+			// e.g. "/C:/Windows" to "C:\\Windows"
+			return tmp
+		}
+
+		tmp += "\\"
+
+		if filepath.IsAbs(tmp) {
+			// If the FromSlash without any starting slashes but with extra end slash is absolute,
+			// then we have a filepath encoded with a prefix '/' and a dropped '/' at the end.
+			// e.g. "/C:" to "C:\\"
+			return tmp
+		}
+	}
+
+	return lp
+}

server.go

@@ -175,7 +175,7 @@ func handlePacket(s *Server, p orderedRequest) error {
 		}
 	case *sshFxpStatPacket:
 		// stat the requested file
-		info, err := os.Stat(p.Path)
+		info, err := os.Stat(toLocalPath(p.Path))
 		rpkt = &sshFxpStatResponse{
 			ID:   p.ID,
 			info: info,
@@ -185,7 +185,7 @@ func handlePacket(s *Server, p orderedRequest) error {
 		}
 	case *sshFxpLstatPacket:
 		// stat the requested file
-		info, err := os.Lstat(p.Path)
+		info, err := os.Lstat(toLocalPath(p.Path))
 		rpkt = &sshFxpStatResponse{
 			ID:   p.ID,
 			info: info,
@@ -209,24 +209,24 @@ func handlePacket(s *Server, p orderedRequest) error {
 		}
 	case *sshFxpMkdirPacket:
 		// TODO FIXME: ignore flags field
-		err := os.Mkdir(p.Path, 0755)
+		err := os.Mkdir(toLocalPath(p.Path), 0755)
 		rpkt = statusFromError(p.ID, err)
 	case *sshFxpRmdirPacket:
-		err := os.Remove(p.Path)
+		err := os.Remove(toLocalPath(p.Path))
 		rpkt = statusFromError(p.ID, err)
 	case *sshFxpRemovePacket:
-		err := os.Remove(p.Filename)
+		err := os.Remove(toLocalPath(p.Filename))
 		rpkt = statusFromError(p.ID, err)
 	case *sshFxpRenamePacket:
-		err := os.Rename(p.Oldpath, p.Newpath)
+		err := os.Rename(toLocalPath(p.Oldpath), toLocalPath(p.Newpath))
 		rpkt = statusFromError(p.ID, err)
 	case *sshFxpSymlinkPacket:
-		err := os.Symlink(p.Targetpath, p.Linkpath)
+		err := os.Symlink(toLocalPath(p.Targetpath), toLocalPath(p.Linkpath))
 		rpkt = statusFromError(p.ID, err)
 	case *sshFxpClosePacket:
 		rpkt = statusFromError(p.ID, s.closeHandle(p.Handle))
 	case *sshFxpReadlinkPacket:
-		f, err := os.Readlink(p.Path)
+		f, err := os.Readlink(toLocalPath(p.Path))
 		rpkt = &sshFxpNamePacket{
 			ID: p.ID,
 			NameAttrs: []*sshFxpNameAttr{
@@ -241,7 +241,7 @@ func handlePacket(s *Server, p orderedRequest) error {
 			rpkt = statusFromError(p.ID, err)
 		}
 	case *sshFxpRealpathPacket:
-		f, err := filepath.Abs(p.Path)
+		f, err := filepath.Abs(toLocalPath(p.Path))
 		f = cleanPath(f)
 		rpkt = &sshFxpNamePacket{
 			ID: p.ID,
@@ -257,6 +257,8 @@ func handlePacket(s *Server, p orderedRequest) error {
 			rpkt = statusFromError(p.ID, err)
 		}
 	case *sshFxpOpendirPacket:
+		p.Path = toLocalPath(p.Path)
+
 		if stat, err := os.Stat(p.Path); err != nil {
 			rpkt = statusFromError(p.ID, err)
 		} else if !stat.IsDir() {
@@ -445,7 +447,7 @@ func (p *sshFxpOpenPacket) respond(svr *Server) responsePacket {
 		osFlags |= os.O_EXCL
 	}
 
-	f, err := os.OpenFile(p.Path, osFlags, 0644)
+	f, err := os.OpenFile(toLocalPath(p.Path), osFlags, 0644)
 	if err != nil {
 		return statusFromError(p.ID, err)
 	}
@@ -482,6 +484,8 @@ func (p *sshFxpSetstatPacket) respond(svr *Server) responsePacket {
 	b := p.Attrs.([]byte)
 	var err error
 
+	p.Path = toLocalPath(p.Path)
+
 	debug("setstat name \"%s\"", p.Path)
 	if (p.Flags & sshFileXferAttrSize) != 0 {
 		var size uint64

stat_plan9.go

@@ -105,5 +105,5 @@ func fromFileMode(mode os.FileMode) uint32 {
 const (
 	s_ISUID = 04000
 	s_ISGID = 02000
-	S_ISVTX = 01000
+	s_ISVTX = 01000
 )