From a8dc017a48d73b89b3b9716082f62b50253048f3 Mon Sep 17 00:00:00 2001
From: Yannick Ulrich <yannick.ulrich@durham.ac.uk>
Date: Sun, 19 Feb 2023 16:54:19 +0000
Subject: [PATCH] Implemented Read

---
 fuse/main.go | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/fuse/main.go b/fuse/main.go
index c5e60c5..769f593 100644
--- a/fuse/main.go
+++ b/fuse/main.go
@@ -49,6 +49,7 @@ type ITNode struct {
 	Ino uint64
 
 	lst []DirEntry
+	self DirEntry
 	path string
 }
 
@@ -188,7 +189,10 @@ func (n *ITNode) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (*
 					Mode: fuse.S_IFREG,
 					Ino: inodemap[file.path],
 				}
-				operations := &ITNode{kind: 2, path: file.path}
+				operations := &ITNode{
+					kind: 2, path: file.path,
+					self: file,
+				}
 				child := n.NewInode(ctx, operations, stable)
 				return child, 0
 			}
@@ -214,6 +218,24 @@ func (fh *bytesFileHandle) Read(ctx context.Context, dest []byte, off int64) (fu
 var _ = (fs.NodeOpener)((*ITNode)(nil))
 func (f *ITNode) Open(ctx context.Context, openFlags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
 	switch f.kind {
+	case 2:
+		// FS file
+		fp, err := myfs.Open(f.path)
+		if err != nil {
+			return nil, 0, syscall.EROFS
+		}
+
+		buf := make([]byte, f.self.size);
+		nread, err := fp.Read(buf)
+		if err != nil || nread != int(f.self.size) {
+			return nil, 0, syscall.EROFS
+		}
+
+		fh = &bytesFileHandle{
+			content: buf,
+		}
+		return fh, fuse.FOPEN_DIRECT_IO, 0
+
 	case 3:
 		// Device file