sync: Port to LibMain

Author: https://github.com/alexmajor
Commit: 6deb032335
Pull-request: https://github.com/SerenityOS/serenity/pull/12034
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/bgianfo
Reviewed-by: https://github.com/kennethmyhra
Reviewed-by: https://github.com/mjz19910

Userland/Utilities/CMakeLists.txt

@@ -164,8 +164,9 @@ target_link_libraries(sql LibLine LibSQL LibIPC)
 target_link_libraries(sort LibMain)
 target_link_libraries(stat LibMain)
 target_link_libraries(strace LibMain)
-target_link_libraries(tac LibMain)
 target_link_libraries(su LibCrypt LibMain)
+target_link_libraries(sync LibMain)
+target_link_libraries(tac LibMain)
 target_link_libraries(tail LibMain)
 target_link_libraries(tar LibArchive LibCompress)
 target_link_libraries(telws LibProtocol LibLine)

Userland/Utilities/sync.cpp

@@ -1,12 +1,14 @@
 /*
  * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2022, Alex Major
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibMain/Main.h>
 #include <unistd.h>
 
-int main(int, char**)
+ErrorOr<int> serenity_main(Main::Arguments)
 {
     sync();
     return 0;