refactor: Rewrite path sanitizer to support write operations on relative tar archives

internal/fs/file.go

@@ -349,6 +349,9 @@ func (f *File) Name() string {
 		"name": f.name,
 	})
 
+	f.ioLock.Lock()
+	defer f.ioLock.Unlock()
+
 	return f.name
 }
 
@@ -357,6 +360,9 @@ func (f *File) Stat() (os.FileInfo, error) {
 		"name": f.name,
 	})
 
+	f.ioLock.Lock()
+	defer f.ioLock.Unlock()
+
 	return f.info, nil
 }
 
@@ -366,6 +372,9 @@ func (f *File) Readdir(count int) ([]os.FileInfo, error) {
 		"count": count,
 	})
 
+	f.ioLock.Lock()
+	defer f.ioLock.Unlock()
+
 	hdrs, err := inventory.List(
 		f.metadata,