Modules: return bool to indicate whether the detection is succeeded

src/modules/monitor/monitor.c

@@ -6,14 +6,14 @@
 
 #include <math.h>
 
-void ffPrintMonitor(FFMonitorOptions* options)
+bool ffPrintMonitor(FFMonitorOptions* options)
 {
     const FFDisplayServerResult* result = ffConnectDisplayServer();
 
     if(!result->displays.length)
     {
         ffPrintError(FF_MONITOR_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "No display detected");
-        return;
+        return false;
     }
 
     FF_STRBUF_AUTO_DESTROY key = ffStrbufCreate();
@@ -84,6 +84,8 @@ void ffPrintMonitor(FFMonitorOptions* options)
         ffStrbufDestroy(&display->name);
         ++index;
     }
+
+    return true;
 }
 
 void ffParseMonitorJsonObject(FFMonitorOptions* options, yyjson_val* module)
@@ -104,9 +106,10 @@ void ffGenerateMonitorJsonConfig(FFMonitorOptions* options, yyjson_mut_doc* doc,
     ffJsonConfigGenerateModuleArgsConfig(doc, module, &options->moduleArgs);
 }
 
-void ffGenerateMonitorJsonResult(FF_MAYBE_UNUSED FFMonitorOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module)
+bool ffGenerateMonitorJsonResult(FF_MAYBE_UNUSED FFMonitorOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module)
 {
     yyjson_mut_obj_add_str(doc, module, "error", "Monitor module is an alias of Display module");
+    return false;
 }
 
 void ffInitMonitorOptions(FFMonitorOptions* options)

src/modules/monitor/monitor.h

@@ -4,7 +4,7 @@
 
 #define FF_MONITOR_MODULE_NAME "Monitor"
 
-void ffPrintMonitor(FFMonitorOptions* options);
+bool ffPrintMonitor(FFMonitorOptions* options);
 void ffInitMonitorOptions(FFMonitorOptions* options);
 void ffDestroyMonitorOptions(FFMonitorOptions* options);