Add define to printf and fflush in telnetsrv for real-time logs

common/utils/telnetsrv/telnetsrv.c

@@ -67,6 +67,12 @@ static telnetsrv_params_t telnetparams;
 #define TELNETSRV_OPTNAME_STATICMOD   "staticmod"
 #define TELNETSRV_OPTNAME_SHRMOD      "shrmod"
 
+#define TELNET_LOG(fmt, ...)                               \
+  do {                                                     \
+    printf("[TELNETSRV] " fmt __VA_OPT__(, ) __VA_ARGS__); \
+    fflush(stdout);                                        \
+  } while (0)
+
 // clang-format off
 paramdef_t telnetoptions[] = {
     /*-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
@@ -653,10 +659,10 @@ void run_telnetsrv(void) {
 
   using_history();
   int plen=sprintf(prompt,"%s_%s> ",TELNET_PROMPT_PREFIX,get_softmodem_function(NULL));
-  printf("\nInitializing telnet server...\n");
+  TELNET_LOG("\nInitializing telnet server...\n");
 
   while( (telnetparams.new_socket = accept(sock, &cli_addr, &cli_len)) ) {
-    printf("[TELNETSRV] Telnet client connected....\n");
+    TELNET_LOG("Telnet client connected....\n");
     read_history(telnetparams.histfile);
     stifle_history(telnetparams.histsize);
 
@@ -682,12 +688,12 @@ void run_telnetsrv(void) {
       }
 
       if(!readc) {
-        printf ("[TELNETSRV] Telnet Client disconnected.\n");
+        TELNET_LOG("Telnet Client disconnected.\n");
         break;
       }
 
       if (telnetparams.telnetdbg > 0)
-        printf("[TELNETSRV] Command received: readc %i filled %i \"%s\"\n", readc, filled,buf);
+        TELNET_LOG("Command received: readc %i filled %i \"%s\"\n", readc, filled, buf);
 
       if (buf[0] == '!') {
         if (buf[1] == '!') {
@@ -720,7 +726,7 @@ void run_telnetsrv(void) {
 
         send(telnetparams.new_socket, prompt, strlen(prompt), MSG_NOSIGNAL);
       } else {
-        printf ("[TELNETSRV] Closing telnet connection...\n");
+        TELNET_LOG("Closing telnet connection...\n");
         break;
       }
     }
@@ -728,7 +734,7 @@ void run_telnetsrv(void) {
     write_history(telnetparams.histfile);
     clear_history();
     close(telnetparams.new_socket);
-    printf ("[TELNETSRV] Telnet server waitting for connection...\n");
+    TELNET_LOG("Telnet server waiting for connection...\n");
   }
 
   close(sock);
@@ -927,7 +933,7 @@ int add_telnetcmd(char *modulename, telnetshell_vardef_t *var, telnetshell_cmdde
           cmd[j].qptr = afifo;
         }
       }
-      printf("[TELNETSRV] Telnet server: module %i = %s added to shell\n", i, telnetparams.CmdParsers[i].module);
+      TELNET_LOG("Telnet server: module %i = %s added to shell\n", i, telnetparams.CmdParsers[i].module);
       break;
     }
   }