Fuse SUCCESS

fuse.go

@@ -0,0 +1,121 @@
+package squashfs
+
+import (
+	"bytes"
+	"context"
+	"io"
+
+	"github.com/CalebQ42/fuse"
+	"github.com/CalebQ42/fuse/fs"
+	"github.com/CalebQ42/squashfs/internal/inode"
+)
+
+func (r *Reader) Mount(mountpoint string) (con *fuse.Conn, err error) {
+	con, err = fuse.Mount(mountpoint, fuse.ReadOnly())
+	if err != nil {
+		return
+	}
+	err = fs.Serve(con, &squashFuse{r: r})
+	return
+}
+
+type squashFuse struct {
+	r *Reader
+}
+
+func (s *squashFuse) Root() (fs.Node, error) {
+	return &fileNode{File: s.r.FS.File}, nil
+}
+
+type fileNode struct {
+	*File
+}
+
+func (f *fileNode) Attr(ctx context.Context, attr *fuse.Attr) error {
+	attr.Blocks = f.r.s.Size / 512
+	if f.r.s.Size%512 > 0 {
+		attr.Blocks++
+	}
+	attr.Gid = f.r.ids[f.i.GidInd]
+	attr.Inode = uint64(f.i.Num)
+	attr.Mode = f.i.Mode()
+	attr.Nlink = f.i.LinkCount()
+	attr.Size = f.i.Size()
+	attr.Uid = f.r.ids[f.i.UidInd]
+	return nil
+}
+
+func (f *fileNode) Id() uint64 {
+	return uint64(f.i.Num)
+}
+
+func (f *fileNode) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
+	return f.SymlinkPath(), nil
+}
+
+func (f *fileNode) Lookup(ctx context.Context, name string) (fs.Node, error) {
+	asFS, err := f.FS()
+	if err != nil {
+		return nil, fuse.ENOTDIR
+	}
+	ret, err := asFS.OpenFile(name)
+	if err != nil {
+		return nil, fuse.ENOENT
+	}
+	return &fileNode{File: ret}, nil
+}
+
+func (f *fileNode) ReadAll(ctx context.Context) ([]byte, error) {
+	if f.IsRegular() {
+		var buf bytes.Buffer
+		_, err := f.WriteTo(&buf)
+		return buf.Bytes(), err
+	}
+	return nil, fuse.ENODATA
+}
+
+func (f *fileNode) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
+	if f.IsRegular() {
+		buf := make([]byte, req.Size)
+		n, err := f.File.ReadAt(buf, req.Offset)
+		if err == io.EOF {
+			resp.Data = buf[:n]
+		}
+		return nil
+	}
+	return fuse.ENODATA
+}
+
+func (f *fileNode) ReadDirAll(ctx context.Context) (out []fuse.Dirent, err error) {
+	asFS, err := f.FS()
+	if err != nil {
+		return nil, fuse.ENOTDIR
+	}
+	var t fuse.DirentType
+	for i := range asFS.e {
+		switch asFS.e[i].Type {
+		case inode.Fil:
+			t = fuse.DT_File
+		case inode.Dir:
+			t = fuse.DT_Dir
+		case inode.Block:
+			t = fuse.DT_Block
+		case inode.Sym:
+			t = fuse.DT_Link
+		case inode.Char:
+			t = fuse.DT_Char
+		case inode.Fifo:
+			t = fuse.DT_FIFO
+		case inode.Sock:
+			t = fuse.DT_Socket
+		default:
+			t = fuse.DT_Unknown
+		}
+		out = append(out, fuse.Dirent{
+			Inode: uint64(asFS.e[i].Num),
+			Type:  t,
+			Name:  asFS.e[i].Name,
+		})
+	}
+	return
+}