Improved CLI experience

main.c

@@ -19,6 +19,7 @@
 static bool _to_work = true;
 static int _sig_fd = -1;
 static int _server_fd = -1;
+static bool _is_server = false;
 
 /*
  * Private API
@@ -68,7 +69,24 @@ bool parse_cli_args(int argc, char** argv) {
     required_args_present &= cli_arg_get("A") ? true : false;
     required_args_present &= cli_arg_get("P") ? true : false;
     required_args_present &= cli_arg_get("E") ? true : false;
-    return required_args_present;
+    if (!required_args_present) {
+        fprintf(stderr, "[!] Some required arguments are missing\n");
+        return false;
+    }
+    const char *mode = cli_arg_get("M");
+    if (strcmp(mode, "server") && strcmp(mode, "client")) {
+        fprintf(stderr, "[!] Unknown mode '%s'\n", mode);
+        return false;
+    }
+    _is_server = !strcmp(mode, "server");
+    flag_verbose = cli_arg_get("V") ? 1 : 0;
+    if (flag_verbose) {
+        fprintf(stdout, "[I] Being verbose\n");
+        fprintf(stdout, "[I]  - Mode ------ %s\n", cli_arg_get("M"));
+        fprintf(stdout, "[I]  - Address --- %s:%d\n", cli_arg_get("A"), atoi(cli_arg_get("P")));
+        fprintf(stdout, "[I]  - Extension - %s\n", cli_arg_get("E"));
+    }
+    return true;
 }
 
 // Initialize signals.
@@ -167,6 +185,7 @@ static void on_fd_event(int fd, uint32_t events) {
 }
 
 int main(int argc, char **argv) {
+    // Initialization
     if (!parse_cli_args(argc, argv)) {
         print_usage_text();
         return 1;
@@ -178,12 +197,14 @@ int main(int argc, char **argv) {
         loop_deinit();
         return 1;
     }
-    if (!server_init()) {
-        signals_deinit();
-        loop_deinit();
-        return 1;
+    if (_is_server) {
+        if (!server_init()) {
+            signals_deinit();
+            loop_deinit();
+            return 1;
+        }
     }
-
+    // Loop
     while (_to_work) {
         if (!loop_wait()) {
             fprintf(stderr, "[!] loop_wait returns false, stopping...\n");
@@ -191,8 +212,10 @@ int main(int argc, char **argv) {
         }
         fprintf(stderr, "--- loop ---\n");
     }
-    
-    server_close();
+    // Termination
+    if (_is_server) {
+        server_close();
+    }
     signals_deinit();
     loop_deinit();
     return 0;