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;

utils.c

@@ -22,16 +22,21 @@ typedef struct {
  */
 static cli_arg_t _cli_args[MAX_CLI_ARGS];
 
+/*
+ * Public data
+ */
+int flag_verbose = 0;
+
 /*
  * Public API
  */
 void print_usage_text() {
     printf("ipoim -M <mode> -A <address> -P <port> -C <carrier> ...\n");
     printf(" --- MANDATORY ARGUMENTS ---\n");
-    printf("    -M <mode>           - operation mode ('provider' or 'last-mile')\n");
+    printf("    -M <mode>           - operation mode ('server' or 'client')\n");
     printf("    -A <address>        - IPv4 to listen on/connect to\n");
     printf("    -P <port>           - port to listen on/connect to\n");
-    printf("    -E <carrier>        - extension to use, one of:\n");
+    printf("    -E <extension>      - extension to use, one of:\n");
     printf("        * pipe          - use STDIN and STDOUT\n");
     printf(" --- OPTIONAL ARGUMENTS ---\n");
     printf("    +V                  - be verbose\n");

utils.h

@@ -3,6 +3,14 @@
 
 #include <stdbool.h>
 
+/*
+ * Public data
+ */
+extern int flag_verbose;
+
+/*
+ * Public API
+ */
 // Print usage text.
 void print_usage_text();