From 8bc1a9e946b60932db83d451c20b7ae2ada82ffe Mon Sep 17 00:00:00 2001
From: Lucas CHOLLET <lucas.chollet@free.fr>
Date: Thu, 13 Jan 2022 23:15:25 +0100
Subject: [PATCH] hostname: Port to LibMain

---
 Userland/Utilities/CMakeLists.txt |  1 +
 Userland/Utilities/hostname.cpp   | 20 ++++++--------------
 2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/Userland/Utilities/CMakeLists.txt b/Userland/Utilities/CMakeLists.txt
index f8ec89ce7c..d50212c4e2 100644
--- a/Userland/Utilities/CMakeLists.txt
+++ b/Userland/Utilities/CMakeLists.txt
@@ -108,6 +108,7 @@ target_link_libraries(gzip LibCompress LibMain)
 target_link_libraries(head LibMain)
 target_link_libraries(hexdump LibMain)
 target_link_libraries(host LibMain)
+target_link_libraries(hostname LibMain)
 target_link_libraries(id LibMain)
 target_link_libraries(ini LibMain)
 target_link_libraries(jp LibMain)
diff --git a/Userland/Utilities/hostname.cpp b/Userland/Utilities/hostname.cpp
index b620242f50..b99713638f 100644
--- a/Userland/Utilities/hostname.cpp
+++ b/Userland/Utilities/hostname.cpp
@@ -5,37 +5,29 @@
  */
 
 #include <LibCore/ArgsParser.h>
+#include <LibCore/System.h>
+#include <LibMain/Main.h>
 #include <limits.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 
-int main(int argc, char** argv)
+ErrorOr<int> serenity_main(Main::Arguments args)
 {
     const char* hostname = nullptr;
 
     Core::ArgsParser args_parser;
     args_parser.add_positional_argument(hostname, "Hostname to set", "hostname", Core::ArgsParser::Required::No);
-    args_parser.parse(argc, argv);
+    args_parser.parse(args);
 
     if (!hostname) {
-        char buffer[HOST_NAME_MAX];
-        int rc = gethostname(buffer, sizeof(buffer));
-        if (rc < 0) {
-            perror("gethostname");
-            return 1;
-        }
-        outln("{}", buffer);
+        outln("{}", TRY(Core::System::gethostname()));
     } else {
         if (strlen(hostname) >= HOST_NAME_MAX) {
             warnln("Hostname must be less than {} characters", HOST_NAME_MAX);
             return 1;
         }
-        int rc = sethostname(hostname, strlen(hostname));
-        if (rc < 0) {
-            perror("sethostname");
-            return 1;
-        }
+        TRY(Core::System::sethostname(hostname));
     }
     return 0;
 }