github.com/urjitbhatia/afero@v1.1.0/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  }