github.com/jomix/afero@v1.1.1/readonlyfs.go (about) 1 package afero 2 3 import ( 4 "os" 5 "syscall" 6 "time" 7 ) 8 9 var _ Lstater = (*ReadOnlyFs)(nil) 10 11 type ReadOnlyFs struct { 12 source Fs 13 } 14 15 func NewReadOnlyFs(source Fs) Fs { 16 return &ReadOnlyFs{source: source} 17 } 18 19 func (r *ReadOnlyFs) ReadDir(name string) ([]os.FileInfo, error) { 20 return ReadDir(r.source, name) 21 } 22 23 func (r *ReadOnlyFs) Chtimes(n string, a, m time.Time) error { 24 return syscall.EPERM 25 } 26 27 func (r *ReadOnlyFs) Chmod(n string, m os.FileMode) error { 28 return syscall.EPERM 29 } 30 31 func (r *ReadOnlyFs) Name() string { 32 return "ReadOnlyFilter" 33 } 34 35 func (r *ReadOnlyFs) Stat(name string) (os.FileInfo, error) { 36 return r.source.Stat(name) 37 } 38 39 func (r *ReadOnlyFs) LstatIfPossible(name string) (os.FileInfo, bool, error) { 40 if lsf, ok := r.source.(Lstater); ok { 41 return lsf.LstatIfPossible(name) 42 } 43 fi, err := r.Stat(name) 44 return fi, false, err 45 } 46 47 func (r *ReadOnlyFs) Rename(o, n string) error { 48 return syscall.EPERM 49 } 50 51 func (r *ReadOnlyFs) RemoveAll(p string) error { 52 return syscall.EPERM 53 } 54 55 func (r *ReadOnlyFs) Remove(n string) error { 56 return syscall.EPERM 57 } 58 59 func (r *ReadOnlyFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) { 60 if flag&(os.O_WRONLY|syscall.O_RDWR|os.O_APPEND|os.O_CREATE|os.O_TRUNC) != 0 { 61 return nil, syscall.EPERM 62 } 63 return r.source.OpenFile(name, flag, perm) 64 } 65 66 func (r *ReadOnlyFs) Open(n string) (File, error) { 67 return r.source.Open(n) 68 } 69 70 func (r *ReadOnlyFs) Mkdir(n string, p os.FileMode) error { 71 return syscall.EPERM 72 } 73 74 func (r *ReadOnlyFs) MkdirAll(n string, p os.FileMode) error { 75 return syscall.EPERM 76 } 77 78 func (r *ReadOnlyFs) Create(n string) (File, error) { 79 return nil, syscall.EPERM 80 }