From e399835466fb364572ab27ef6947f1a11c674549 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Mon, 29 Nov 2021 19:35:51 +0100
Subject: [PATCH] ChessEngine: Port to LibMain :^)

---
 Userland/Services/ChessEngine/CMakeLists.txt |  2 +-
 Userland/Services/ChessEngine/main.cpp       | 22 +++++++-------------
 2 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/Userland/Services/ChessEngine/CMakeLists.txt b/Userland/Services/ChessEngine/CMakeLists.txt
index d5b61aab8c..1af7be2aef 100644
--- a/Userland/Services/ChessEngine/CMakeLists.txt
+++ b/Userland/Services/ChessEngine/CMakeLists.txt
@@ -10,4 +10,4 @@ set(SOURCES
 )
 
 serenity_bin(ChessEngine)
-target_link_libraries(ChessEngine LibChess LibCore)
+target_link_libraries(ChessEngine LibChess LibCore LibMain)
diff --git a/Userland/Services/ChessEngine/main.cpp b/Userland/Services/ChessEngine/main.cpp
index d07e5ce173..8060b79ccd 100644
--- a/Userland/Services/ChessEngine/main.cpp
+++ b/Userland/Services/ChessEngine/main.cpp
@@ -7,24 +7,16 @@
 #include "ChessEngine.h"
 #include <LibCore/EventLoop.h>
 #include <LibCore/File.h>
-#include <unistd.h>
+#include <LibCore/System.h>
+#include <LibMain/Main.h>
 
-int main()
+ErrorOr<int> serenity_main(Main::Arguments)
 {
-    if (pledge("stdio recvfd sendfd unix rpath", nullptr) < 0) {
-        perror("pledge");
-        return 1;
-    }
+    TRY(Core::System::pledge("stdio recvfd sendfd unix rpath"));
     Core::EventLoop loop;
-    if (pledge("stdio recvfd sendfd unix", nullptr) < 0) {
-        perror("pledge");
-        return 1;
-    }
-    if (unveil(nullptr, nullptr) < 0) {
-        perror("unveil");
-        return 1;
-    }
+    TRY(Core::System::pledge("stdio recvfd sendfd unix"));
+    TRY(Core::System::unveil(nullptr, nullptr));
 
-    auto engine = ChessEngine::construct(Core::File::standard_input(), Core::File::standard_output());
+    auto engine = TRY(ChessEngine::try_create(Core::File::standard_input(), Core::File::standard_output()));
     return loop.exec();
 }