From 9d98326cde3bacb41e5af43f38727cd64322f9cd Mon Sep 17 00:00:00 2001
From: Charles Munson <jetwhiz@jetwhiz.com>
Date: Sat, 26 Jan 2019 18:43:21 -0500
Subject: [PATCH] Upstream patch: Ignore .encfs6.xml file in reverse mode
 (#478)

* Ignore .encfs6.xml file in reverse mode

# Conflicts:
#	encfs/DirNode.cpp
#	encfs/DirNode.h
#	integration/normal.t.pl
#	integration/reverse.t.pl
---
 encfs/DirNode.cpp | 22 ++++++++++++++++------
 encfs/DirNode.h   |  3 ++-
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/encfs/DirNode.cpp b/encfs/DirNode.cpp
index 7a004a45..2adafb81 100644
--- a/encfs/DirNode.cpp
+++ b/encfs/DirNode.cpp
@@ -52,8 +52,8 @@ class DirDeleter {
 };
 
 DirTraverse::DirTraverse(const std::shared_ptr<unix::DIR> &_dirPtr, uint64_t _iv,
-                         const std::shared_ptr<NameIO> &_naming)
-    : dir(_dirPtr), iv(_iv), naming(_naming) {}
+                         const std::shared_ptr<NameIO> &_naming, bool _root)
+    : dir(_dirPtr), iv(_iv), naming(_naming), root(_root) {}
 
 DirTraverse::DirTraverse(const DirTraverse &src)
     : dir(src.dir), iv(src.iv), naming(src.naming) {}
@@ -70,6 +70,7 @@ DirTraverse::~DirTraverse() {
   dir.reset();
   iv = 0;
   naming.reset();
+  root = false;
 }
 
 static bool _nextName(struct unix::dirent *&de, const std::shared_ptr<unix::DIR> &dir,
@@ -98,6 +99,10 @@ static bool _nextName(struct unix::dirent *&de, const std::shared_ptr<unix::DIR>
 std::string DirTraverse::nextPlaintextName(int *fileType, ino_t *inode) {
   struct unix::dirent *de = 0;
   while (_nextName(de, dir, fileType, inode)) {
+    if (root && (strcmp(".encfs6.xml", de->d_name) == 0)) {
+      VLOG(1) << "skipping filename: " << de->d_name;
+      continue;
+    }
     try {
       uint64_t localIv = iv;
       return naming->decodePath(de->d_name, &localIv);
@@ -113,7 +118,11 @@ std::string DirTraverse::nextPlaintextName(int *fileType, ino_t *inode) {
 std::string DirTraverse::nextInvalid() {
   struct unix::dirent *de = 0;
   // find the first name which produces a decoding error...
-  while (_nextName(de, dir, (int *)0, (ino_t *)0)) {
+  while (_nextName(de, dir, (int *)nullptr, (ino_t *)nullptr)) {
+    if (root && (strcmp(".encfs6.xml", de->d_name) == 0)) {
+      VLOG(1) << "skipping filename: " << de->d_name;
+      continue;
+    }
     try {
       uint64_t localIv = iv;
       naming->decodePath(de->d_name, &localIv);
@@ -364,8 +373,9 @@ DirTraverse DirNode::openDir(const char *plaintextPath) {
 
   unix::DIR *dir = unix::opendir(cyName.c_str());
   if (dir == NULL) {
-    VLOG(1) << "opendir error " << strerror(errno);
-    return DirTraverse(shared_ptr<unix::DIR>(), 0, std::shared_ptr<NameIO>());
+    int eno = errno;
+    VLOG(1) << "opendir error " << strerror(eno);
+    return DirTraverse(shared_ptr<unix::DIR>(), 0, std::shared_ptr<NameIO>(), false);
   } else {
     std::shared_ptr<unix::DIR> dp(dir, DirDeleter());
 
@@ -377,7 +387,7 @@ DirTraverse DirNode::openDir(const char *plaintextPath) {
     } catch (encfs::Error &err) {
       RLOG(ERROR) << "encode err: " << err.what();
     }
-    return DirTraverse(dp, iv, naming);
+    return DirTraverse(dp, iv, naming, (strlen(plaintextPath) == 1));
   }
 }
 
diff --git a/encfs/DirNode.h b/encfs/DirNode.h
index 2f6e87fd..5e8717f8 100644
--- a/encfs/DirNode.h
+++ b/encfs/DirNode.h
@@ -49,7 +49,7 @@ struct RenameEl;
 class DirTraverse {
  public:
   DirTraverse(const std::shared_ptr<unix::DIR> &dirPtr, uint64_t iv,
-              const std::shared_ptr<NameIO> &naming);
+              const std::shared_ptr<NameIO> &naming, bool root);
   DirTraverse(const DirTraverse &src);
   ~DirTraverse();
 
@@ -75,6 +75,7 @@ class DirTraverse {
   // more efficient to support filename IV chaining..
   uint64_t iv;
   std::shared_ptr<NameIO> naming;
+  bool root;
 };
 inline bool DirTraverse::valid() const { return dir.get() != 0; }