Don't make SHM extension dependent option

This was here because I though banan-os didn't define them, but they do
exist there :^)

0001-linux-window-server-sdl2.patch

@@ -1,6 +1,6 @@
-From 075f6a11926e247ba64efd25a3acf7a3d3be0bbc Mon Sep 17 00:00:00 2001
+From c9dd87198ce5262e6ddf6bf3b0c18eb84784d35e Mon Sep 17 00:00:00 2001
 From: Oskari Alaranta <oskari.alaranta@bananymous.com>
-Date: Wed, 15 Apr 2026 16:51:16 +0300
+Date: Wed, 15 Apr 2026 17:52:54 +0300
 Subject: [PATCH] linux-window-server-sdl2
 
 ---
@@ -13,8 +13,8 @@ Subject: [PATCH] linux-window-server-sdl2
  userspace/programs/WindowServer/Window.cpp    |  29 +-
  .../programs/WindowServer/WindowServer.cpp    |  47 ++-
  .../programs/WindowServer/WindowServer.h      |   1 +
- userspace/programs/WindowServer/main.cpp      | 362 ++++++++++++------
- 10 files changed, 338 insertions(+), 173 deletions(-)
+ userspace/programs/WindowServer/main.cpp      | 357 ++++++++++++------
+ 10 files changed, 340 insertions(+), 166 deletions(-)
 
 diff --git a/userspace/libraries/LibGUI/Widget/Widget.cpp b/userspace/libraries/LibGUI/Widget/Widget.cpp
 index d6489d87..c532fb04 100644
@@ -376,7 +376,7 @@ index 94fbc774..bcd7a6b9 100644
  private:
  	void on_mouse_move_impl(int32_t new_x, int32_t new_y);
 diff --git a/userspace/programs/WindowServer/main.cpp b/userspace/programs/WindowServer/main.cpp
-index 41bd7e8c..cb066bd3 100644
+index 46f2ba6d..520c8e7d 100644
 --- a/userspace/programs/WindowServer/main.cpp
 +++ b/userspace/programs/WindowServer/main.cpp
 @@ -10,7 +10,6 @@
@@ -425,7 +425,7 @@ index 41bd7e8c..cb066bd3 100644
  		signal(sig, exit);
  	for (int sig : non_terminating_signals)
  		signal(sig, SIG_DFL);
-@@ -208,55 +202,10 @@ int main()
+@@ -208,51 +202,15 @@ int main()
  		signal(sig, SIG_IGN);
  
  	MUST(LibInput::KeyboardLayout::initialize());
@@ -469,20 +469,18 @@ index 41bd7e8c..cb066bd3 100644
  	dprintln("Window server started");
  
 -	if (access("/usr/bin/xbanan", X_OK) == 0)
--	{
--		if (fork() == 0)
--		{
++	if (access("./build/xbanan/xbanan", X_OK) == 0)
+ 	{
+ 		if (fork() == 0)
+ 		{
 -			dup2(STDDBG_FILENO, STDOUT_FILENO);
 -			dup2(STDDBG_FILENO, STDERR_FILENO);
 -			execl("/usr/bin/xbanan", "xbanan", NULL);
--			exit(1);
--		}
--	}
--
- 	auto config = parse_config();
- 
- 	WindowServer window_server(framebuffer, config.corner_radius);
-@@ -276,26 +225,23 @@ int main()
++			execl("./build/xbanan/xbanan", "xbanan", NULL);
+ 			exit(1);
+ 		}
+ 	}
+@@ -276,26 +234,23 @@ int main()
  	uint64_t last_sync_us = get_current_us() - sync_interval_us;
  	while (!window_server.is_stopped())
  	{
@@ -520,7 +518,7 @@ index 41bd7e8c..cb066bd3 100644
  		if (epoll_events == -1 && errno != EINTR)
  		{
  			dwarnln("epoll_pwait2: {}", strerror(errno));
-@@ -333,48 +279,6 @@ int main()
+@@ -333,48 +288,6 @@ int main()
  				continue;
  			}
  
@@ -569,7 +567,7 @@ index 41bd7e8c..cb066bd3 100644
  			const int client_fd = events[i].data.fd;
  			if (events[i].events & (EPOLLHUP | EPOLLERR))
  			{
-@@ -500,3 +404,237 @@ int main()
+@@ -500,3 +413,237 @@ int main()
  		}
  	}
  }

LICENSE

@@ -0,0 +1,24 @@
+BSD 2-Clause License
+
+Copyright (c) 2026, Oskari Alaranta
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

@@ -0,0 +1,29 @@
+# xbanan
+
+An X11 compatibility layer for [banan-os's](https://git.bananymous.com/Bananymous/banan-os) native GUI windowing system.
+
+## Running on linux
+
+### Building
+```sh
+git clone --recursive https://git.bananymous.com/Bananymous/xbanan.git
+cd xbanan
+
+cd banan-os
+git apply ../0001-linux-window-server-sdl2.patch
+cd ..
+
+cmake -B build -S . -G Ninja
+cmake --build build
+```
+
+### Running
+
+To start the WindowServer, run the following command in project root
+```sh
+./build/banan-os/userspace/programs/WindowServer/WindowServer
+```
+To run X11 apps specify `DISPLAY=:69` environment variable. For example
+```sh
+DISPLAY=:69 xeyes
+```

xbanan/Base.cpp

@@ -1400,6 +1400,8 @@ BAN::ErrorOr<void> handle_packet(Client& client_info, BAN::ConstByteSpan packet)
 			if (event_mask != 0)
 				TRY(object_it->value->object.get<Object::Window>().event_masks.insert(&client_info, event_mask));
 
+			TRY(parent_window.children.push_back(request.wid));
+
 			if (gui_window_ptr)
 			{
 				const WINDOW wid = request.wid;

xbanan/CMakeLists.txt

@@ -12,12 +12,7 @@ set(SOURCES
 )
 
 option(ENABLE_GLX "enable glx extension" ON)
-
-include(CheckSymbolExists)
-include(CMakeDependentOption)
-check_symbol_exists(shmat "sys/shm.h" HAVE_SHMAT)
-check_symbol_exists(shmdt "sys/shm.h" HAVE_SHMDT)
-cmake_dependent_option(ENABLE_SHM "enable shm extension" ON "HAVE_SHMAT;HAVE_SHMDT" OFF)
+option(ENABLE_SHM "enable shm extension" ON)
 
 if(ENABLE_GLX)
 	set(SOURCES ${SOURCES} ExtGLX.cpp)

xbanan/ExtGLX.cpp

@@ -1,8 +1,8 @@
 #include "Extensions.h"
 #include "Utils.h"
 
-#include <GL/glx.h>
 #include <GL/glxproto.h>
+#include <GL/glxtokens.h>
 
 using BOOL32 = CARD32;
 
@@ -12,11 +12,11 @@ CARD32 g_fb_configs[2][24][2] {
 		{ GLX_VISUAL_ID,           g_visual.visualID },
 		{ GLX_BUFFER_SIZE,         32 },
 		{ GLX_LEVEL,               0 },
-		{ GLX_DOUBLEBUFFER,     True },
-		{ GLX_STEREO,           False },
+		{ GLX_DOUBLEBUFFER,        xTrue },
+		{ GLX_STEREO,              xFalse },
 		{ GLX_RENDER_TYPE,         GLX_RGBA_BIT },
 		{ GLX_DRAWABLE_TYPE,       GLX_WINDOW_BIT },
-		{ GLX_X_RENDERABLE,     True },
+		{ GLX_X_RENDERABLE,        xTrue },
 		{ GLX_X_VISUAL_TYPE,       GLX_TRUE_COLOR },
 		{ GLX_CONFIG_CAVEAT,       GLX_NONE },
 		{ GLX_TRANSPARENT_TYPE,    GLX_NONE },
@@ -30,19 +30,19 @@ CARD32 g_fb_configs[2][24][2] {
 		{ GLX_ACCUM_GREEN_SIZE,    0 },
 		{ GLX_ACCUM_BLUE_SIZE,     0 },
 		{ GLX_ACCUM_ALPHA_SIZE,    0 },
-		{ GLX_SAMPLE_BUFFERS,   0 },
-		{ GLX_SAMPLES,          0 },
+		{ GLX_SAMPLE_BUFFERS_SGIS, 0 },
+		{ GLX_SAMPLES_SGIS,        0 },
 	},
 	{
 		{ GLX_FBCONFIG_ID,         2 },
 		{ GLX_VISUAL_ID,           g_visual.visualID },
 		{ GLX_BUFFER_SIZE,         32 },
 		{ GLX_LEVEL,               0 },
-		{ GLX_DOUBLEBUFFER,     False },
-		{ GLX_STEREO,           False },
+		{ GLX_DOUBLEBUFFER,        xFalse },
+		{ GLX_STEREO,              xFalse },
 		{ GLX_RENDER_TYPE,         GLX_RGBA_BIT },
 		{ GLX_DRAWABLE_TYPE,       GLX_WINDOW_BIT },
-		{ GLX_X_RENDERABLE,     True },
+		{ GLX_X_RENDERABLE,        xTrue },
 		{ GLX_X_VISUAL_TYPE,       GLX_TRUE_COLOR },
 		{ GLX_CONFIG_CAVEAT,       GLX_NONE },
 		{ GLX_TRANSPARENT_TYPE,    GLX_NONE },
@@ -56,8 +56,8 @@ CARD32 g_fb_configs[2][24][2] {
 		{ GLX_ACCUM_GREEN_SIZE,    0 },
 		{ GLX_ACCUM_BLUE_SIZE,     0 },
 		{ GLX_ACCUM_ALPHA_SIZE,    0 },
-		{ GLX_SAMPLE_BUFFERS,   0 },
-		{ GLX_SAMPLES,          0 },
+		{ GLX_SAMPLE_BUFFERS_SGIS, 0 },
+		{ GLX_SAMPLES_SGIS,        0 },
 	},
 };
 

xbanan/main.cpp

@@ -7,6 +7,7 @@
 
 #include <signal.h>
 #include <sys/epoll.h>
+#include <sys/socket.h>
 #include <sys/stat.h>
 #include <unistd.h>
 
@@ -18,18 +19,19 @@
 #include <netinet/in.h>
 #endif
 
-static const xRectangle s_screen_bounds =
+static BAN::UniqPtr<LibGUI::Window> s_dummy_window =
 	[]() {
 		auto attributes = LibGUI::Window::default_attributes;
 		attributes.shown = false;
-		auto window = MUST(LibGUI::Window::create(0, 0, ""_sv, attributes));
-		return xRectangle {
+		return MUST(LibGUI::Window::create(0, 0, ""_sv, attributes));
+	}();
+
+static const xRectangle s_screen_bounds = {
 	.x = 0,
 	.y = 0,
-			.width = static_cast<CARD16>(window->width()),
-			.height = static_cast<CARD16>(window->height()),
+	.width = static_cast<CARD16>(s_dummy_window->width()),
+	.height = static_cast<CARD16>(s_dummy_window->height()),
 };
-	}();
 
 const xPixmapFormat g_formats[6] {
 	{
@@ -172,12 +174,25 @@ int main()
 		return 1;
 	}
 
+	{
 		epoll_event event { .events = EPOLLIN, .data = { .ptr = nullptr } };
 		if (epoll_ctl(g_epoll_fd, EPOLL_CTL_ADD, server_sock, &event) == -1)
 		{
 			perror("xbanan: epoll_ctl");
 			return 1;
 		}
+	}
+
+	{
+		epoll_event event { .events = EPOLLIN, .data = { .ptr = (void*)1 } };
+		if (epoll_ctl(g_epoll_fd, EPOLL_CTL_ADD, s_dummy_window->server_fd(), &event) == -1)
+		{
+			perror("xbanan: epoll_ctl");
+			return 1;
+		}
+
+		s_dummy_window->request_resize(1, 1);
+	}
 
 #define APPEND_ATOM(name) do { \
 			MUST(g_atoms_id_to_name.insert(name, #name##_sv.substring(3))); \
@@ -397,6 +412,12 @@ int main()
 				continue;
 			}
 
+			if (events[i].data.ptr == (void*)1)
+			{
+				s_dummy_window->poll_events();
+				continue;
+			}
+
 			auto it = g_epoll_thingies.find(events[i].data.fd);
 			if (it == g_epoll_thingies.end())
 				continue;