1// Copyright 2016 the Go-FUSE Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package pathfs 6 7import ( 8 "fmt" 9 "time" 10 11 "github.com/hanwen/go-fuse/v2/fuse" 12 "github.com/hanwen/go-fuse/v2/fuse/nodefs" 13) 14 15// NewReadonlyFileSystem returns a wrapper that only exposes read-only 16// operations. 17func NewReadonlyFileSystem(fs FileSystem) FileSystem { 18 return &readonlyFileSystem{fs} 19} 20 21type readonlyFileSystem struct { 22 FileSystem 23} 24 25func (fs *readonlyFileSystem) GetAttr(name string, context *fuse.Context) (*fuse.Attr, fuse.Status) { 26 return fs.FileSystem.GetAttr(name, context) 27} 28 29func (fs *readonlyFileSystem) Readlink(name string, context *fuse.Context) (string, fuse.Status) { 30 return fs.FileSystem.Readlink(name, context) 31} 32 33func (fs *readonlyFileSystem) Mknod(name string, mode uint32, dev uint32, context *fuse.Context) fuse.Status { 34 return fuse.EPERM 35} 36 37func (fs *readonlyFileSystem) Mkdir(name string, mode uint32, context *fuse.Context) fuse.Status { 38 return fuse.EPERM 39} 40 41func (fs *readonlyFileSystem) Unlink(name string, context *fuse.Context) (code fuse.Status) { 42 return fuse.EPERM 43} 44 45func (fs *readonlyFileSystem) Rmdir(name string, context *fuse.Context) (code fuse.Status) { 46 return fuse.EPERM 47} 48 49func (fs *readonlyFileSystem) Symlink(value string, linkName string, context *fuse.Context) (code fuse.Status) { 50 return fuse.EPERM 51} 52 53func (fs *readonlyFileSystem) Rename(oldName string, newName string, context *fuse.Context) (code fuse.Status) { 54 return fuse.EPERM 55} 56 57func (fs *readonlyFileSystem) Link(oldName string, newName string, context *fuse.Context) (code fuse.Status) { 58 return fuse.EPERM 59} 60 61func (fs *readonlyFileSystem) Chmod(name string, mode uint32, context *fuse.Context) (code fuse.Status) { 62 return fuse.EPERM 63} 64 65func (fs *readonlyFileSystem) Chown(name string, uid uint32, gid uint32, context *fuse.Context) (code fuse.Status) { 66 return fuse.EPERM 67} 68 69func (fs *readonlyFileSystem) Truncate(name string, offset uint64, context *fuse.Context) (code fuse.Status) { 70 return fuse.EPERM 71} 72 73func (fs *readonlyFileSystem) Open(name string, flags uint32, context *fuse.Context) (file nodefs.File, code fuse.Status) { 74 if flags&fuse.O_ANYWRITE != 0 { 75 return nil, fuse.EPERM 76 } 77 file, code = fs.FileSystem.Open(name, flags, context) 78 return nodefs.NewReadOnlyFile(file), code 79} 80 81func (fs *readonlyFileSystem) OpenDir(name string, context *fuse.Context) (stream []fuse.DirEntry, status fuse.Status) { 82 return fs.FileSystem.OpenDir(name, context) 83} 84 85func (fs *readonlyFileSystem) OnMount(nodeFs *PathNodeFs) { 86 fs.FileSystem.OnMount(nodeFs) 87} 88 89func (fs *readonlyFileSystem) OnUnmount() { 90 fs.FileSystem.OnUnmount() 91} 92 93func (fs *readonlyFileSystem) String() string { 94 return fmt.Sprintf("readonlyFileSystem(%v)", fs.FileSystem) 95} 96 97func (fs *readonlyFileSystem) Access(name string, mode uint32, context *fuse.Context) (code fuse.Status) { 98 return fs.FileSystem.Access(name, mode, context) 99} 100 101func (fs *readonlyFileSystem) Create(name string, flags uint32, mode uint32, context *fuse.Context) (file nodefs.File, code fuse.Status) { 102 return nil, fuse.EPERM 103} 104 105func (fs *readonlyFileSystem) Utimens(name string, atime *time.Time, ctime *time.Time, context *fuse.Context) (code fuse.Status) { 106 return fuse.EPERM 107} 108 109func (fs *readonlyFileSystem) GetXAttr(name string, attr string, context *fuse.Context) ([]byte, fuse.Status) { 110 return fs.FileSystem.GetXAttr(name, attr, context) 111} 112 113func (fs *readonlyFileSystem) SetXAttr(name string, attr string, data []byte, flags int, context *fuse.Context) fuse.Status { 114 return fuse.EPERM 115} 116 117func (fs *readonlyFileSystem) ListXAttr(name string, context *fuse.Context) ([]string, fuse.Status) { 118 return fs.FileSystem.ListXAttr(name, context) 119} 120 121func (fs *readonlyFileSystem) RemoveXAttr(name string, attr string, context *fuse.Context) fuse.Status { 122 return fuse.EPERM 123} 124