func (fs *helloFS) ReadFile(
op *fuseops.ReadFileOp) (err error) {
// Let io.ReaderAt deal with the semantics.
reader := strings.NewReader("Hello, world!")
op.Data = make([]byte, op.Size)
n, err := reader.ReadAt(op.Data, op.Offset)
op.Data = op.Data[:n]
// Special case: FUSE doesn't expect us to return io.EOF.
if err == io.EOF {
err = nil
}
return
}
func (fs *memFS) ReadFile(
op *fuseops.ReadFileOp) (err error) {
fs.mu.Lock()
defer fs.mu.Unlock()
// Find the inode in question.
inode := fs.getInodeOrDie(op.Inode)
// Serve the request.
op.Data = make([]byte, op.Size)
n, err := inode.ReadAt(op.Data, op.Offset)
op.Data = op.Data[:n]
// Don't return EOF errors; we just indicate EOF to fuse using a short read.
if err == io.EOF {
err = nil
}
return
}
func (fs *flushFS) ReadFile(
op *fuseops.ReadFileOp) (err error) {
fs.mu.Lock()
defer fs.mu.Unlock()
// Ensure the offset is in range.
if op.Offset > int64(len(fs.fooContents)) {
return
}
// Read what we can.
op.Data = make([]byte, op.Size)
copy(op.Data, fs.fooContents[op.Offset:])
return
}
