From 1dbf49175649d4025d2a95a40bf34339650e9bff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=BD=D0=B0=D0=B1?= <nabijaczleweli@nabijaczleweli.xyz>
Date: Tue, 15 Oct 2024 18:23:19 +0200
Subject: [PATCH] Allow building with fuse3

---
 CMakeLists.txt |  8 ++++++--
 src/getattr.cc |  2 +-
 src/readdir.cc | 10 +++++-----
 src/tmfs.hh    | 10 ++++++++--
 4 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 074077e..95574f0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,9 +5,13 @@ project(TMFS CXX)
 set(CMAKE_CXX_STANDARD 17)
 
 find_package(PkgConfig)
-pkg_check_modules(FUSE REQUIRED fuse)
+pkg_check_modules(FUSE fuse3)
+if(NOT FUSE_FOUND)
+  pkg_check_modules(FUSE REQUIRED fuse)
+endif()
+string(REGEX REPLACE "\\..*" "" FUSE_VERSION ${FUSE_VERSION})
 
-add_definitions(${FUSE_CFLAGS} -Wall)
+add_definitions(${FUSE_CFLAGS} -DFUSE=${FUSE_VERSION} -Wall)
 include_directories(${Boost_INCLUDE_DIRS})
 
 add_executable(tmfs
diff --git a/src/getattr.cc b/src/getattr.cc
index 636b936..5ac4211 100644
--- a/src/getattr.cc
+++ b/src/getattr.cc
@@ -1,6 +1,6 @@
 #include "tmfs.hh"
 
-int tmfs_getattr(const char *path, struct stat *stbuf)
+int tmfs_getattr(const char *path, struct stat *stbuf FUSE3_ONLY(, struct fuse_file_info *))
 {
   // get the real path
   std::string real_path = get_real_path(path);
diff --git a/src/readdir.cc b/src/readdir.cc
index 9961b74..14b3b2a 100644
--- a/src/readdir.cc
+++ b/src/readdir.cc
@@ -1,7 +1,7 @@
 #include "tmfs.hh"
 
 int tmfs_readdir(const char * path, void * buf, fuse_fill_dir_t filler_cb, off_t offset,
-                 struct fuse_file_info * fi)
+                 struct fuse_file_info * fi FUSE3_ONLY(, enum fuse_readdir_flags))
 {
   // get the real path
   std::string real_path = get_real_path(path);
@@ -15,8 +15,8 @@ int tmfs_readdir(const char * path, void * buf, fuse_fill_dir_t filler_cb, off_t
   // report ./ and ../
   stbuf.st_mode = S_IFDIR | 0755;
   stbuf.st_nlink = 2;
-  filler_cb(buf, ".", &stbuf, 0);
-  filler_cb(buf, "..", &stbuf, 0);
+  filler_cb(buf, ".", &stbuf, 0 FUSE3_ONLY(, FUSE_FILL_DIR_PLUS));
+  filler_cb(buf, "..", &stbuf, 0 FUSE3_ONLY(, FUSE_FILL_DIR_PLUS));
 
   // now iterate over the real directory
   DIR * dir = opendir(real_path.c_str());
@@ -28,11 +28,11 @@ int tmfs_readdir(const char * path, void * buf, fuse_fill_dir_t filler_cb, off_t
   {
     // stat the file pointed by entry
     auto file_path = fs::path(path) / entry->d_name;
-    if (tmfs_getattr(file_path.string().c_str(), &stbuf))
+    if (tmfs_getattr(file_path.string().c_str(), &stbuf FUSE3_ONLY(, nullptr)))
       continue;
     stbuf.st_mode |= 0755;
     // report the entry
-    filler_cb(buf, entry->d_name, &stbuf, 0);
+    filler_cb(buf, entry->d_name, &stbuf, 0 FUSE3_ONLY(, FUSE_FILL_DIR_PLUS));
   }
   closedir(dir);
 
diff --git a/src/tmfs.hh b/src/tmfs.hh
index 8c16b9f..eea2163 100644
--- a/src/tmfs.hh
+++ b/src/tmfs.hh
@@ -1,6 +1,12 @@
 #pragma once
 
+#if FUSE == 2
 #define FUSE_USE_VERSION 26
+#define FUSE3_ONLY(...)
+#else
+#define FUSE_USE_VERSION FUSE_MAKE_VERSION(3, 14)
+#define FUSE3_ONLY(...) __VA_ARGS__
+#endif
 
 #include <sys/time.h>
 #include <sys/types.h>
@@ -38,9 +44,9 @@ std::string get_real_path(const std::string & path);
 
 /** fuse functions
  * @{ */
-int tmfs_getattr(const char * path, struct stat *stbuf);
+int tmfs_getattr(const char * path, struct stat *stbuf FUSE3_ONLY(, struct fuse_file_info *));
 int tmfs_readdir(const char * path, void * buf, fuse_fill_dir_t filler_callback,
-                 off_t offset, struct fuse_file_info * fi);
+                 off_t offset, struct fuse_file_info * fi FUSE3_ONLY(, enum fuse_readdir_flags));
 int tmfs_read(const char * path, char * buf, size_t nbytes, off_t offset,
               struct fuse_file_info * fi);
 int tmfs_readlink(const char * path, char * buf, size_t size);