Fix issue with reverse mode and excluded virtual filesHEADmaster

This fixes #686. Now the `gocryptfs.longname.*.name` are present and readable in the
reverse mount, regardless of the complexity of the exclusion patterns.

The main issue was a `cPath` instead of `dPath` for the exclude check in
`fusefrontend_reverse/node_helpers.go`. Also added a check to avoid the exclusion of
`gocryptfs.conf` in the root directory.

The test run results are in line with the main branch.

Fixes https://github.com/rfjakob/gocryptfs/issues/686

1 files changed, 1 insertions, 1 deletions

diff --git a/internal/fusefrontend_reverse/node_helpers.go b/internal/fusefrontend_reverse/node_helpers.go
index 3165db6..f733689 100644
--- a/internal/fusefrontend_reverse/node_helpers.go
+++ b/internal/fusefrontend_reverse/node_helpers.go
@@ -134,7 +134,7 @@ func (n *Node) lookupLongnameName(ctx context.Context, nameFile string, out *fus
 	if errno != 0 {
 		return
 	}
-	if rn.isExcludedPlain(filepath.Join(d.cPath, pName)) {
+	if rn.isExcludedPlain(filepath.Join(d.pPath, pName)) {
 		errno = syscall.EPERM
 		return
 	}