socket-client: Send a user-provided message to the server

apps/socket-client.cpp

@@ -1,11 +1,20 @@
+#include <os/ArgumentParser.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <unistd.h>
 
-int main()
+Result<int> luna_main(int argc, char** argv)
 {
+    StringView message;
+
+    os::ArgumentParser parser;
+    parser.add_description("A UNIX domain socket client, to test said sockets.");
+    parser.add_system_program_info("socket-client"_sv);
+    parser.add_positional_argument(message, "message"_sv, "exit"_sv);
+    parser.parse(argc, argv);
+
     int sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
     if (sockfd < 0)
     {
@@ -31,8 +40,7 @@ int main()
         printf("Message from server: %s\n", buf);
     }
 
-    const char* message = "EXIT";
-    write(sockfd, message, strlen(message));
+    write(sockfd, message.chars(), message.length());
 
     close(sockfd);