github.com/hanwen/go-fuse@v1.0.0/fuse/pathfs/readonlyfs.go (about) 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 5 package pathfs 6 7 import ( 8 "fmt" 9 "time" 10 11 "github.com/hanwen/go-fuse/fuse" 12 "github.com/hanwen/go-fuse/fuse/nodefs" 13 ) 14 15 // NewReadonlyFileSystem returns a wrapper that only exposes read-only 16 // operations. 17 func NewReadonlyFileSystem(fs FileSystem) FileSystem { 18 return &readonlyFileSystem{fs} 19 } 20 21 type readonlyFileSystem struct { 22 FileSystem 23 } 24 25 func (fs *readonlyFileSystem) GetAttr(name string, context *fuse.Context) (*fuse.Attr, fuse.Status) { 26 return fs.FileSystem.GetAttr(name, context) 27 } 28 29 func (fs *readonlyFileSystem) Readlink(name string, context *fuse.Context) (string, fuse.Status) { 30 return fs.FileSystem.Readlink(name, context) 31 } 32 33 func (fs *readonlyFileSystem) Mknod(name string, mode uint32, dev uint32, context *fuse.Context) fuse.Status { 34 return fuse.EPERM 35 } 36 37 func (fs *readonlyFileSystem) Mkdir(name string, mode uint32, context *fuse.Context) fuse.Status { 38 return fuse.EPERM 39 } 40 41 func (fs *readonlyFileSystem) Unlink(name string, context *fuse.Context) (code fuse.Status) { 42 return fuse.EPERM 43 } 44 45 func (fs *readonlyFileSystem) Rmdir(name string, context *fuse.Context) (code fuse.Status) { 46 return fuse.EPERM 47 } 48 49 func (fs *readonlyFileSystem) Symlink(value string, linkName string, context *fuse.Context) (code fuse.Status) { 50 return fuse.EPERM 51 } 52 53 func (fs *readonlyFileSystem) Rename(oldName string, newName string, context *fuse.Context) (code fuse.Status) { 54 return fuse.EPERM 55 } 56 57 func (fs *readonlyFileSystem) Link(oldName string, newName string, context *fuse.Context) (code fuse.Status) { 58 return fuse.EPERM 59 } 60 61 func (fs *readonlyFileSystem) Chmod(name string, mode uint32, context *fuse.Context) (code fuse.Status) { 62 return fuse.EPERM 63 } 64 65 func (fs *readonlyFileSystem) Chown(name string, uid uint32, gid uint32, context *fuse.Context) (code fuse.Status) { 66 return fuse.EPERM 67 } 68 69 func (fs *readonlyFileSystem) Truncate(name string, offset uint64, context *fuse.Context) (code fuse.Status) { 70 return fuse.EPERM 71 } 72 73 func (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 81 func (fs *readonlyFileSystem) OpenDir(name string, context *fuse.Context) (stream []fuse.DirEntry, status fuse.Status) { 82 return fs.FileSystem.OpenDir(name, context) 83 } 84 85 func (fs *readonlyFileSystem) OnMount(nodeFs *PathNodeFs) { 86 fs.FileSystem.OnMount(nodeFs) 87 } 88 89 func (fs *readonlyFileSystem) OnUnmount() { 90 fs.FileSystem.OnUnmount() 91 } 92 93 func (fs *readonlyFileSystem) String() string { 94 return fmt.Sprintf("readonlyFileSystem(%v)", fs.FileSystem) 95 } 96 97 func (fs *readonlyFileSystem) Access(name string, mode uint32, context *fuse.Context) (code fuse.Status) { 98 return fs.FileSystem.Access(name, mode, context) 99 } 100 101 func (fs *readonlyFileSystem) Create(name string, flags uint32, mode uint32, context *fuse.Context) (file nodefs.File, code fuse.Status) { 102 return nil, fuse.EPERM 103 } 104 105 func (fs *readonlyFileSystem) Utimens(name string, atime *time.Time, ctime *time.Time, context *fuse.Context) (code fuse.Status) { 106 return fuse.EPERM 107 } 108 109 func (fs *readonlyFileSystem) GetXAttr(name string, attr string, context *fuse.Context) ([]byte, fuse.Status) { 110 return fs.FileSystem.GetXAttr(name, attr, context) 111 } 112 113 func (fs *readonlyFileSystem) SetXAttr(name string, attr string, data []byte, flags int, context *fuse.Context) fuse.Status { 114 return fuse.EPERM 115 } 116 117 func (fs *readonlyFileSystem) ListXAttr(name string, context *fuse.Context) ([]string, fuse.Status) { 118 return fs.FileSystem.ListXAttr(name, context) 119 } 120 121 func (fs *readonlyFileSystem) RemoveXAttr(name string, attr string, context *fuse.Context) fuse.Status { 122 return fuse.EPERM 123 }