Merge pull request #38929 from touilleMan/exit-status-on-godot-error

Fix Godot returned status code on unexpected error

core/core_bind.cpp

@@ -322,18 +322,6 @@ uint64_t _OS::get_static_memory_peak_usage() const {
 	return OS::get_singleton()->get_static_memory_peak_usage();
 }
 
-int _OS::get_exit_code() const {
-	return OS::get_singleton()->get_exit_code();
-}
-
-void _OS::set_exit_code(int p_code) {
-	if (p_code < 0 || p_code > 125) {
-		WARN_PRINT("For portability reasons, the exit code should be set between 0 and 125 (inclusive).");
-	}
-
-	OS::get_singleton()->set_exit_code(p_code);
-}
-
 /**
  *  Get current datetime with consideration for utc and
  *     dst
@@ -730,9 +718,6 @@ void _OS::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_datetime_from_unix_time", "unix_time_val"), &_OS::get_datetime_from_unix_time);
 	ClassDB::bind_method(D_METHOD("get_unix_time_from_datetime", "datetime"), &_OS::get_unix_time_from_datetime);
 
-	ClassDB::bind_method(D_METHOD("get_exit_code"), &_OS::get_exit_code);
-	ClassDB::bind_method(D_METHOD("set_exit_code", "code"), &_OS::set_exit_code);
-
 	ClassDB::bind_method(D_METHOD("delay_usec", "usec"), &_OS::delay_usec);
 	ClassDB::bind_method(D_METHOD("delay_msec", "msec"), &_OS::delay_msec);
 	ClassDB::bind_method(D_METHOD("get_ticks_msec"), &_OS::get_ticks_msec);
@@ -777,7 +762,6 @@ void _OS::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("request_permissions"), &_OS::request_permissions);
 	ClassDB::bind_method(D_METHOD("get_granted_permissions"), &_OS::get_granted_permissions);
 
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "exit_code"), "set_exit_code", "get_exit_code");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "low_processor_usage_mode"), "set_low_processor_usage_mode", "is_in_low_processor_usage_mode");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "low_processor_usage_mode_sleep_usec"), "set_low_processor_usage_mode_sleep_usec", "get_low_processor_usage_mode_sleep_usec");
 

core/core_bind.h

@@ -199,8 +199,6 @@ public:
 
 	void set_use_file_access_save_and_swap(bool p_enable);
 
-	int get_exit_code() const;
-	void set_exit_code(int p_code);
 	Dictionary get_date(bool utc) const;
 	Dictionary get_time(bool utc) const;
 	Dictionary get_datetime(bool utc) const;

core/os/os.h

@@ -40,6 +40,7 @@
 #include "core/templates/vector.h"
 
 #include <stdarg.h>
+#include <stdlib.h>
 
 class OS {
 	static OS *singleton;
@@ -53,7 +54,7 @@ class OS {
 	bool _debug_stdout = false;
 	String _local_clipboard;
 	bool _no_window = false;
-	int _exit_code = 0;
+	int _exit_code = EXIT_FAILURE; // unexpected exit is marked as failure
 	int _orientation;
 	bool _allow_hidpi = false;
 	bool _allow_layered = false;

doc/classes/OS.xml

@@ -549,10 +549,6 @@
 		</method>
 	</methods>
 	<members>
-		<member name="exit_code" type="int" setter="set_exit_code" getter="get_exit_code" default="0">
-			The exit code passed to the OS when the main loop exits. By convention, an exit code of [code]0[/code] indicates success whereas a non-zero exit code indicates an error. For portability reasons, the exit code should be set between 0 and 125 (inclusive).
-			[b]Note:[/b] This value will be ignored if using [method SceneTree.quit] with an [code]exit_code[/code] argument passed.
-		</member>
 		<member name="low_processor_usage_mode" type="bool" setter="set_low_processor_usage_mode" getter="is_in_low_processor_usage_mode" default="false">
 			If [code]true[/code], the engine optimizes for low processor usage by only refreshing the screen if needed. Can improve battery consumption on mobile.
 		</member>

doc/classes/SceneTree.xml

@@ -181,10 +181,12 @@
 		<method name="quit">
 			<return type="void">
 			</return>
-			<argument index="0" name="exit_code" type="int" default="-1">
+			<argument index="0" name="exit_code" type="int" default="0">
 			</argument>
 			<description>
-				Quits the application at the end of the current iteration. A process [code]exit_code[/code] can optionally be passed as an argument. If this argument is [code]0[/code] or greater, it will override the [member OS.exit_code] defined before quitting the application.
+				Quits the application at the end of the current iteration. Argument [code]exit_code[/code] can optionally be given (defaulting to 0) to customize the exit status code.
+				By convention, an exit code of [code]0[/code] indicates success whereas a non-zero exit code indicates an error.
+				For portability reasons, the exit code should be set between 0 and 125 (inclusive).
 			</description>
 		</method>
 		<method name="reload_current_scene">

main/main.cpp

@@ -1992,7 +1992,7 @@ bool Main::start() {
 
 		if (check_only) {
 			if (!script_res->is_valid()) {
-				OS::get_singleton()->set_exit_code(1);
+				OS::get_singleton()->set_exit_code(EXIT_FAILURE);
 			}
 			return false;
 		}

scene/main/scene_tree.cpp

@@ -54,6 +54,7 @@
 #include "window.h"
 
 #include <stdio.h>
+#include <stdlib.h>
 
 void SceneTreeTimer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_time_left", "time"), &SceneTreeTimer::set_time_left);
@@ -534,12 +535,7 @@ void SceneTree::finalize() {
 }
 
 void SceneTree::quit(int p_exit_code) {
-	if (p_exit_code >= 0) {
-		// Override the exit code if a positive argument is given (the default is `-1`).
-		// This is a shorthand for calling `set_exit_code()` on the OS singleton then quitting.
-		OS::get_singleton()->set_exit_code(p_exit_code);
-	}
-
+	OS::get_singleton()->set_exit_code(p_exit_code);
 	_quit = true;
 }
 
@@ -1205,7 +1201,7 @@ void SceneTree::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("get_node_count"), &SceneTree::get_node_count);
 	ClassDB::bind_method(D_METHOD("get_frame"), &SceneTree::get_frame);
-	ClassDB::bind_method(D_METHOD("quit", "exit_code"), &SceneTree::quit, DEFVAL(-1));
+	ClassDB::bind_method(D_METHOD("quit", "exit_code"), &SceneTree::quit, DEFVAL(EXIT_SUCCESS));
 
 	ClassDB::bind_method(D_METHOD("queue_delete", "obj"), &SceneTree::queue_delete);
 

scene/main/scene_tree.h

@@ -245,7 +245,7 @@ public:
 	void set_auto_accept_quit(bool p_enable);
 	void set_quit_on_go_back(bool p_enable);
 
-	void quit(int p_exit_code = -1);
+	void quit(int p_exit_code = EXIT_SUCCESS);
 
 	_FORCE_INLINE_ float get_physics_process_time() const { return physics_process_time; }
 	_FORCE_INLINE_ float get_process_time() const { return process_time; }