sleep: Port to LibMain

Userland/Utilities/CMakeLists.txt

@@ -161,8 +161,9 @@ target_link_libraries(run-tests LibRegex LibCoredump)
 target_link_libraries(shot LibGUI LibMain)
 target_link_libraries(shuf LibMain)
 target_link_libraries(shutdown LibMain)
-target_link_libraries(sql LibLine LibMain LibSQL LibIPC)
+target_link_libraries(sleep LibMain)
 target_link_libraries(sort LibMain)
+target_link_libraries(sql LibLine LibMain LibSQL LibIPC)
 target_link_libraries(stat LibMain)
 target_link_libraries(strace LibMain)
 target_link_libraries(stty LibMain)

Userland/Utilities/sleep.cpp

@@ -1,10 +1,13 @@
 /*
  * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2022, Alex Major
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
 #include <LibCore/ArgsParser.h>
+#include <LibCore/System.h>
+#include <LibMain/Main.h>
 #include <errno.h>
 #include <signal.h>
 #include <stdio.h>
@@ -18,23 +21,20 @@ static void handle_sigint(int)
     g_interrupted = true;
 }
 
-int main(int argc, char** argv)
+ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
     double secs;
 
     Core::ArgsParser args_parser;
     args_parser.add_positional_argument(secs, "Number of seconds to sleep for", "num-seconds");
-    args_parser.parse(argc, argv);
+    args_parser.parse(arguments);
 
     struct sigaction sa;
     memset(&sa, 0, sizeof(struct sigaction));
     sa.sa_handler = handle_sigint;
     sigaction(SIGINT, &sa, nullptr);
 
-    if (pledge("stdio sigaction", nullptr) < 0) {
-        perror("pledge");
-        return 1;
-    }
+    TRY(Core::System::pledge("stdio sigaction", nullptr));
 
     double whole_seconds = static_cast<time_t>(secs);
     double fraction = secs - whole_seconds;
@@ -63,7 +63,7 @@ sleep_again:
         outln("Sleep interrupted with {}.{} seconds remaining.", remaining_sleep.tv_sec, remaining_sleep.tv_nsec);
     }
 
-    signal(SIGINT, SIG_DFL);
+    TRY(Core::System::signal(SIGINT, SIG_DFL));
     if (g_interrupted)
         raise(SIGINT);