From 45a24f90b99b2264e2a8fd9356d6ee11c3d7d83e Mon Sep 17 00:00:00 2001
From: NishiOwO <nishi@nishi.boats>
Date: Sun, 16 Nov 2025 08:26:47 +0900
Subject: [PATCH] mdm

---
 mdm/CMakeLists.txt | 17 +++++++++++-
 mdm/login.c        | 29 ++++++++++++++++++++
 mdm/main.c         | 30 ++++++++++++++++++++-
 mdm/mdm.h          | 11 ++++++++
 mdm/xserver.c      | 67 ++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 152 insertions(+), 2 deletions(-)
 create mode 100644 mdm/login.c
 create mode 100644 mdm/mdm.h
 create mode 100644 mdm/xserver.c

diff --git a/mdm/CMakeLists.txt b/mdm/CMakeLists.txt
index b3776a4..2610e02 100644
--- a/mdm/CMakeLists.txt
+++ b/mdm/CMakeLists.txt
@@ -2,6 +2,9 @@ project(
 	mdm
 )
 
+find_package(PkgConfig)
+pkg_check_modules(X11 REQUIRED x11)
+
 file(
 	GLOB
 	mdm_SRC
@@ -13,10 +16,22 @@ add_executable(
 	${mdm_SRC}
 )
 
+target_include_directories(
+	mdm
+	PRIVATE
+	${X11_INCLUDE_DIRS}
+)
+
+target_link_directories(
+	mdm
+	PRIVATE
+	${X11_LIBRARY_DIRS}
+)
+
 target_link_libraries(
 	mdm
 	PRIVATE
-	MDELib
+	${X11_LIBRARIES} MDELib Mw
 )
 
 include(GNUInstallDirs)
diff --git a/mdm/login.c b/mdm/login.c
new file mode 100644
index 0000000..c09a2fd
--- /dev/null
+++ b/mdm/login.c
@@ -0,0 +1,29 @@
+#include "mdm.h"
+
+#include <Mw/Milsko.h>
+
+void make_login_window(void){
+	MwWidget w, pic, userlabel, usercombo, passlabel, passentry;
+
+	MwLibraryInit();
+	
+	w = MwVaCreateWidget(MwWindowClass, "login", NULL, (x_width() - 366) / 2, (x_height() - 183) / 2, 366, 183,
+		MwNhasBorder, 1,
+		MwNinverted, 0,
+	NULL);
+	pic = MwVaCreateWidget(MwImageClass, "image", w, 10, 10, 80, 137,
+		MwNhasBorder, 1,
+	NULL);
+	userlabel = MwVaCreateWidget(MwLabelClass, "userlabel", w, 95, 10, MwTextWidth(w, "User:"), 16,
+		MwNtext, "User:",
+	NULL);
+	usercombo = MwCreateWidget(MwComboBoxClass, "usercombo", w, 95, 10+16+5, 265, 18);
+	passlabel = MwVaCreateWidget(MwLabelClass, "passlabel", w, 95, 10+16+5+18+5, MwTextWidth(w, "Password:"), 16,
+		MwNtext, "Password:",
+	NULL);
+	passentry = MwVaCreateWidget(MwEntryClass, "passentry", w, 95, 10+16+5+18+5+16+5, 265, 18,
+		MwNhideInput, 1,
+	NULL);
+
+	MwLoop(w);
+}
diff --git a/mdm/main.c b/mdm/main.c
index 979a1cd..0231884 100644
--- a/mdm/main.c
+++ b/mdm/main.c
@@ -1 +1,29 @@
-int main(){}
+#include "mdm.h"
+
+#include <stdio.h>
+#include <string.h>
+
+int is_launch_x = 1;
+
+int main(int argc, char** argv){
+	int i, st;
+	
+	for(i = 1; i < argc; i++){
+		if(argv[i][0] == '-'){
+			if(strcmp(argv[i], "-X") == 0 || strcmp(argv[i], "--no-launch-x") == 0){
+				is_launch_x = 0;
+			}else{
+				fprintf(stderr, "%s: bad option: %s\n", argv[0], argv[i]);
+				return 1;
+			}
+		}
+	}
+
+	if(is_launch_x){
+		if((st = launch_x()) != 0) return st;
+	}
+
+	init_x();
+
+	make_login_window();
+}
diff --git a/mdm/mdm.h b/mdm/mdm.h
new file mode 100644
index 0000000..60b27ed
--- /dev/null
+++ b/mdm/mdm.h
@@ -0,0 +1,11 @@
+#ifndef __MDM_H__
+#define __MDM_H__
+
+int launch_x(void);
+int x_width(void);
+int x_height(void);
+void init_x(void);
+
+void make_login_window(void);
+
+#endif
diff --git a/mdm/xserver.c b/mdm/xserver.c
new file mode 100644
index 0000000..1bef1b0
--- /dev/null
+++ b/mdm/xserver.c
@@ -0,0 +1,67 @@
+#include "mdm.h"
+
+#include <X11/Xlib.h>
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static pid_t x_server;
+static int got_usr1;
+static Display* display;
+
+static void catch_usr1(int sig){
+	got_usr1 = 1;
+}
+
+int launch_x(void){
+	got_usr1 = 0;
+
+	signal(SIGUSR1, catch_usr1);
+
+	if((x_server = fork()) == 0){
+		signal(SIGUSR1, SIG_IGN);
+		execlp("X", "X", ":0", NULL);
+		_exit(-1);
+	}else{
+		while(!got_usr1){
+			if(waitpid(x_server, NULL, WNOHANG) != 0){
+				fprintf(stderr, "server died. what happened?\n");
+				return 1;
+			}
+			usleep(1000);
+		}
+	}
+
+	setenv("DISPLAY", ":0", 1);
+
+	return 0;
+}
+
+void init_x(void){
+	XColor bg;
+
+	display = XOpenDisplay(NULL);
+
+	bg.red = 0x1c * 256;
+	bg.green = 0x45 * 256;
+	bg.blue = 0x73 * 256;
+	XAllocColor(display, DefaultColormap(display, DefaultScreen(display)), &bg);
+
+	XSetWindowBackground(display, DefaultRootWindow(display), bg.pixel);
+	XClearWindow(display, DefaultRootWindow(display));
+	XFlush(display);
+}
+
+int x_width(void){
+	return DisplayWidth(display, DefaultScreen(display));
+}
+
+int x_height(void){
+	return DisplayHeight(display, DefaultScreen(display));
+}