Let rigctl_parse return when EOF is detected

tests/rigctl_parse.c

@@ -490,6 +490,8 @@ static int scanfc(FILE *fin, const char *format, void *p)
         }
 
         if (ret < 1) rig_debug(RIG_DEBUG_TRACE, "%s: ret=%d\n", __func__, ret);
+        if (ferror(fin)) rig_debug(RIG_DEBUG_TRACE, "%s: errno=%d\n", __func__, errno);
+ 
         return ret;
     }
     while (1);
@@ -626,11 +628,10 @@ int rigctl_parse(RIG *my_rig, FILE *fin, FILE *fout, char *argv[], int argc,
 
             do
             {
-                if (scanfc(fin, "%c", &cmd) < 1)
+                if ((retcode = scanfc(fin, "%c", &cmd)) < 1)
                 {
-                    rig_debug(RIG_DEBUG_WARN, "%s: nothing to scan#1?\n", __func__);
-                    cmd = 0x0a; // setting 0x0a as though CR/LF was sent
-                    hl_usleep(200*1e6);
+                    rig_debug(RIG_DEBUG_WARN, "%s: nothing to scan#1? retcode=%d\n", __func__, retcode);
+                    return -1;
                 }
 
                 /* Extended response protocol requested with leading '+' on command

tests/rigctld.c

@@ -1031,7 +1031,7 @@ void *handle_socket(void *arg)
             retcode = 1;
         }
 
-        if (retcode == 1)
+        if (retcode == 1 || retcode == -1)
         {
             retcode = rig_close(my_rig);
             rig_debug(RIG_DEBUG_ERR,"%s: rig_close retcode=%d\n", __func__, retcode);