Implemented Write
This commit is contained in:
parent
a8dc017a48
commit
2a8de96773
58
fuse/main.go
58
fuse/main.go
@ -202,12 +202,12 @@ func (n *ITNode) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (*
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return nil, syscall.ENOENT
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return nil, syscall.ENOENT
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}
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}
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type bytesFileHandle struct {
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type bytesFileReadHandle struct {
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content []byte
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content []byte
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}
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}
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var _ = (fs.FileReader)((*bytesFileHandle)(nil))
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var _ = (fs.FileReader)((*bytesFileReadHandle)(nil))
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func (fh *bytesFileHandle) Read(ctx context.Context, dest []byte, off int64) (fuse.ReadResult, syscall.Errno) {
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func (fh *bytesFileReadHandle) Read(ctx context.Context, dest []byte, off int64) (fuse.ReadResult, syscall.Errno) {
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end := off + int64(len(dest))
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end := off + int64(len(dest))
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if end > int64(len(fh.content)) {
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if end > int64(len(fh.content)) {
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end = int64(len(fh.content))
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end = int64(len(fh.content))
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@ -215,11 +215,56 @@ func (fh *bytesFileHandle) Read(ctx context.Context, dest []byte, off int64) (fu
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return fuse.ReadResultData(fh.content[off:end]), 0
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return fuse.ReadResultData(fh.content[off:end]), 0
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}
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}
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type bytesFileWriteHandle struct {
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content []byte
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path string
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}
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var _ = (fs.FileWriter)((*bytesFileWriteHandle)(nil))
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func (fh *bytesFileWriteHandle) Write(ctx context.Context, data []byte, off int64) (written uint32, errno syscall.Errno) {
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if off != int64(len(fh.content)) {
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}
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fh.content = append(fh.content[:], data[:]...)
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return uint32(len(data)), 0
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}
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var _ = (fs.FileFlusher)((*bytesFileWriteHandle)(nil))
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func (fh *bytesFileWriteHandle) Flush(ctx context.Context) (errno syscall.Errno) {
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fp, err := myfs.Create(fh.path, uint32(len(fh.content)))
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if err != nil {
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return syscall.EROFS
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}
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nread, err := fp.Write(fh.content)
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if err != nil || nread != len(fh.content) {
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return syscall.EROFS
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}
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return 0
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}
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var _ = (fs.NodeSetattrer)((*ITNode)(nil))
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func (bn *ITNode) Setattr(ctx context.Context, fh fs.FileHandle, in *fuse.SetAttrIn, out *fuse.AttrOut) syscall.Errno {
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out.Size = 0;
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out.Mtime = 0;
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return 0
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}
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var _ = (fs.NodeOpener)((*ITNode)(nil))
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var _ = (fs.NodeOpener)((*ITNode)(nil))
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func (f *ITNode) Open(ctx context.Context, openFlags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
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func (f *ITNode) Open(ctx context.Context, openFlags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
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switch f.kind {
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switch f.kind {
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case 2:
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case 2:
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// FS file
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// FS file
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if openFlags&syscall.O_RDWR != 0 {
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return nil, 0, syscall.EROFS
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}
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if openFlags & syscall.O_WRONLY != 0 {
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fh = &bytesFileWriteHandle{
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path : f.path,
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content : make([]byte, 0),
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}
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return fh, fuse.FOPEN_DIRECT_IO, 0
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} else {
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fp, err := myfs.Open(f.path)
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fp, err := myfs.Open(f.path)
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if err != nil {
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if err != nil {
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return nil, 0, syscall.EROFS
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return nil, 0, syscall.EROFS
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@ -231,16 +276,17 @@ func (f *ITNode) Open(ctx context.Context, openFlags uint32) (fh fs.FileHandle,
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return nil, 0, syscall.EROFS
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return nil, 0, syscall.EROFS
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}
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}
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fh = &bytesFileHandle{
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fh = &bytesFileReadHandle{
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content: buf,
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content: buf,
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}
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}
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return fh, fuse.FOPEN_DIRECT_IO, 0
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return fh, fuse.FOPEN_DIRECT_IO, 0
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}
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case 3:
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case 3:
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// Device file
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// Device file
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// disallow writes
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// disallow writes
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if fuseFlags&(syscall.O_RDWR|syscall.O_WRONLY) != 0 {
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if openFlags&(syscall.O_RDWR|syscall.O_WRONLY) != 0 {
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return nil, 0, syscall.EROFS
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return nil, 0, syscall.EROFS
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}
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}
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@ -251,7 +297,7 @@ func (f *ITNode) Open(ctx context.Context, openFlags uint32) (fh fs.FileHandle,
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return nil, 0, syscall.EROFS
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return nil, 0, syscall.EROFS
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}
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}
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fh = &bytesFileHandle{
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fh = &bytesFileReadHandle{
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content: ans,
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content: ans,
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}
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}
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return fh, fuse.FOPEN_DIRECT_IO, 0
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return fh, fuse.FOPEN_DIRECT_IO, 0
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