From 07c310c6152f47783933358208aa9fb1d88bf951 Mon Sep 17 00:00:00 2001
From: Marcus Holland-Moritz <github@mhxnet.de>
Date: Sun, 25 Jun 2023 09:46:20 +0200
Subject: [PATCH] Add listxattr implementation to make EAs work

---
 src/dwarfs_main.cpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/dwarfs_main.cpp b/src/dwarfs_main.cpp
index 40d5cc9e..215c9346 100644
--- a/src/dwarfs_main.cpp
+++ b/src/dwarfs_main.cpp
@@ -816,6 +816,26 @@ int op_getxattr(char const* path, char const* name, char* value, size_t size) {
 
   return err;
 }
+
+template <typename LoggerPolicy>
+int op_listxattr(char const* path, char* list, size_t size) {
+  dUSERDATA;
+  LOG_PROXY(LoggerPolicy, userdata->lgr);
+
+  LOG_DEBUG << __func__ << "(" << path << ", " << size << ")";
+
+  const std::string all_xattr = std::string(pid_xattr) + '\0';
+
+  if (size > 0) {
+    if (size < all_xattr.size()) {
+      return -ERANGE;
+    }
+
+    ::memcpy(list, all_xattr.data(), all_xattr.size());
+  }
+
+  return all_xattr.size();
+}
 #endif
 
 void usage(char const* progname) {
@@ -916,6 +936,7 @@ void init_fuse_ops(struct fuse_operations& ops) {
   ops.readdir = &op_readdir<LoggerPolicy>;
   ops.statfs = &op_statfs<LoggerPolicy>;
   ops.getxattr = &op_getxattr<LoggerPolicy>;
+  ops.listxattr = &op_listxattr<LoggerPolicy>;
 }
 #endif