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Revert "lib/model: Handle filename conflicts on Windows."

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This reverts commit 01e50eb3fa.
This commit is contained in:
Jakob Borg 2016-12-23 11:10:58 +01:00
parent 01e50eb3fa
commit f5a310ad64
6 changed files with 1 additions and 222 deletions
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18
lib/model/model.go
View File

@ -122,7 +122,6 @@ var (
errDeviceIgnored = errors.New("device is ignored")
errNotRelative = errors.New("not a relative path")
errNotDir = errors.New("parent is not a directory")
errNameConflict = errors.New("filename collides with existing file")
)
// NewModel creates and starts a new model. The model starts in read-only mode,
@ -1160,11 +1159,6 @@ func (m *Model) Request(deviceID protocol.DeviceID, folder, name string, offset
return protocol.ErrNoSuchFile
}
if !osutil.CheckNameConflict(folderPath, name) {
l.Debugf("%v REQ(in) for file not in dir: %s: %q / %q o=%d s=%d", m, deviceID, folder, name, offset, len(buf))
return protocol.ErrNoSuchFile
}
// Only check temp files if the flag is set, and if we are set to advertise
// the temp indexes.
if fromTemporary && !folderCfg.DisableTempIndexes {
@ -1902,12 +1896,7 @@ func (m *Model) internalScanFolderSubdirs(folder string, subDirs []string) error
// The file is valid and not deleted. Lets check if it's
// still here.
var exists bool
if !osutil.IsDir(folderCfg.Path(), filepath.Dir(f.Name)) {
exists = false
} else if !osutil.CheckNameConflict(folderCfg.Path(), f.Name) {
exists = false
} else if _, err := mtimefs.Lstat(filepath.Join(folderCfg.Path(), f.Name)); err != nil {
if _, err := mtimefs.Lstat(filepath.Join(folderCfg.Path(), f.Name)); err != nil {
// We don't specifically verify that the error is
// os.IsNotExist because there is a corner case when a
// directory is suddenly transformed into a file. When that
@ -1915,11 +1904,6 @@ func (m *Model) internalScanFolderSubdirs(folder string, subDirs []string) error
// file) are deleted but will return a confusing error ("not a
// directory") when we try to Lstat() them.
exists = false
} else {
exists = true
}
if !exists {
nf := protocol.FileInfo{
Name: f.Name,
Type: f.Type,

24
lib/model/rwfolder.go
View File

@ -435,13 +435,6 @@ func (f *sendReceiveFolder) pullerIteration(ignores *ignore.Matcher) int {
continue
}
// Verify that we handle the right thing and not something whose name
// collides.
if !osutil.CheckNameConflict(f.dir, fi.Name) {
f.newError(fi.Name, errNameConflict)
continue
}
switch {
case fi.IsDeleted():
// A deleted file, directory or symlink
@ -531,13 +524,6 @@ nextFile:
continue
}
// Verify that we handle the right thing and not something whose name
// collides.
if !osutil.CheckNameConflict(f.dir, fi.Name) {
f.newError(fi.Name, errNameConflict)
continue
}
// Check our list of files to be removed for a match, in which case
// we can just do a rename instead.
key := string(fi.Blocks[0].Hash)
@ -1287,16 +1273,6 @@ func (f *sendReceiveFolder) copierRoutine(in <-chan copyBlocksState, pullChan ch
if err != nil {
return false
}
// The following checks are racy
if !osutil.IsDir(folderRoots[folder], filepath.Dir(file)) {
return false
}
if !osutil.CheckNameConflict(folderRoots[folder], file) {
return false
}
if info, err := osutil.Lstat(inFile); err != nil || !info.Mode().IsRegular() {
return false
}
fd, err := os.Open(inFile)
if err != nil {
return false

17
lib/osutil/name_conflict.go
View File

@ -1,17 +0,0 @@
// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build !windows
package osutil
// CheckNameConflict returns true if every path component of name up to and
// including filepath.Join(base, name) doesn't conflict with any existing
// files or folders with different names. Base and name must both be clean and
// name must be relative to base.
func CheckNameConflict(base, name string) bool {
return true
}

48
lib/osutil/name_conflict_windows.go
View File

@ -1,48 +0,0 @@
// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build windows
package osutil
import (
"os"
"path/filepath"
"strings"
"syscall"
)
// CheckNameConflict returns true if every path component of name up to and
// including filepath.Join(base, name) doesn't conflict with any existing
// files or folders with different names. Base and name must both be clean and
// name must be relative to base.
func CheckNameConflict(base, name string) bool {
// Conflicts can be caused by different casing (e.g. foo and FOO) or
// by the use of short names (e.g. foo.barbaz and FOO~1.BAR).
path := base
parts := strings.Split(name, string(os.PathSeparator))
for _, part := range parts {
path = filepath.Join(path, part)
pathp, err := syscall.UTF16PtrFromString(path)
if err != nil {
return false
}
var data syscall.Win32finddata
handle, err := syscall.FindFirstFile(pathp, &data)
if err == syscall.ERROR_FILE_NOT_FOUND {
return true
}
if err != nil {
return false
}
syscall.FindClose(handle)
fileName := syscall.UTF16ToString(data.FileName[:])
if part != fileName {
return false
}
}
return true
}

108
lib/osutil/name_conflict_windows_test.go
View File

@ -1,108 +0,0 @@
// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build windows
package osutil_test
import (
"os"
"path"
"path/filepath"
"syscall"
"testing"
"unsafe"
"github.com/syncthing/syncthing/lib/osutil"
)
func TestCheckNameConflictCasing(t *testing.T) {
os.RemoveAll("testdata")
defer os.RemoveAll("testdata")
os.MkdirAll("testdata/Foo/BAR/baz", 0755)
// check if the file system is case-sensitive
if _, err := os.Lstat("testdata/foo"); err != nil {
t.Skip("pointless test")
return
}
cases := []struct {
name string
conflictFree bool
}{
// Exists
{"Foo", true},
{"Foo/BAR", true},
{"Foo/BAR/baz", true},
// Doesn't exist
{"bar", true},
{"Foo/baz", true},
// Conflicts
{"foo", false},
{"foo/BAR", false},
{"Foo/bar", false},
{"Foo/BAR/BAZ", false},
}
for _, tc := range cases {
nativeName := filepath.FromSlash(tc.name)
if res := osutil.CheckNameConflict("testdata", nativeName); res != tc.conflictFree {
t.Errorf("CheckNameConflict(%q) = %v, should be %v", tc.name, res, tc.conflictFree)
}
}
}
func TestCheckNameConflictShortName(t *testing.T) {
os.RemoveAll("testdata")
defer os.RemoveAll("testdata")
os.MkdirAll("testdata/foobarbaz/qux", 0755)
ppath, err := syscall.UTF16PtrFromString("testdata/foobarbaz")
if err != nil {
t.Fatal("unexpected error", err)
}
// check if the file system supports short names
bufferSize, err := syscall.GetShortPathName(ppath, nil, 0)
if err != nil {
t.Skip("pointless test")
return
}
// get the short name
buffer := make([]uint16, bufferSize)
length, err := syscall.GetShortPathName(ppath,
(*uint16)(unsafe.Pointer(&buffer[0])), bufferSize)
if err != nil {
t.Fatal("unexpected error", err)
}
// on success length doesn't contain the terminating null character
if bufferSize != length+1 {
t.Fatal("length of short name changed")
}
shortName := filepath.Base(syscall.UTF16ToString(buffer))
cases := []struct {
name string
conflictFree bool
}{
// Exists
{"foobarbaz", true},
{"foobarbaz/qux", true},
// Doesn't exist
{"foo", true},
{"foobarbaz/quux", true},
// Conflicts
{shortName, false},
{path.Join(shortName, "qux"), false},
{path.Join(shortName, "quux"), false},
}
for _, tc := range cases {
nativeName := filepath.FromSlash(tc.name)
if res := osutil.CheckNameConflict("testdata", nativeName); res != tc.conflictFree {
t.Errorf("CheckNameConflict(%q) = %v, should be %v", tc.name, res, tc.conflictFree)
}
}
}

8
lib/scanner/walk.go
View File

@ -130,14 +130,6 @@ func (w *walker) walk() (chan protocol.FileInfo, error) {
filepath.Walk(w.Dir, hashFiles)
} else {
for _, sub := range w.Subs {
if !osutil.IsDir(w.Dir, filepath.Dir(sub)) {
l.Infoln("Skipping sub path that is not in a directory", w.Dir, sub)
continue
}
if !osutil.CheckNameConflict(w.Dir, sub) {
l.Infoln("Skipping sub path that collides", w.Dir, sub)
continue
}
filepath.Walk(filepath.Join(w.Dir, sub), hashFiles)
}
}