1 files changed, 149 insertions, 0 deletions
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..750423c
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,149 @@
+/*
+ * main.c: desktop session starter
+ *
+ * (C) Copyright 2009 Intel Corporation
+ * Authors:
+ *     Auke Kok <auke@linux.intel.com>
+ *     Arjan van de Ven <arjan@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <pwd.h>
+
+#include "user-session.h"
+
+#define DEFAULT_USERNAME "app"
+
+int tty = 1;
+char username[256] = DEFAULT_USERNAME;
+char dpinum[256] = "auto";
+char addn_xopts[256] = "";
+int session_pid;
+
+
+static void
+start_systemd_session(void)
+{
+	char *ptrs[3];
+	int ret;
+
+	ret = fork();
+	if (ret) {
+		session_pid = ret;
+		return; /* parent remains active */
+	}
+
+	ret = system("/usr/bin/xdg-user-dirs-update");
+	if (ret)
+		lprintf("/usr/bin/xdg-user-dirs-update failed");
+
+	ptrs[0] = strdup("/usr/lib/systemd/systemd");
+	ptrs[1] = strdup("--user");
+	ptrs[2] = NULL;
+	ret = execv(ptrs[0], ptrs);
+
+	if (ret != EXIT_SUCCESS)
+		lprintf("Failed to start systemd --user");
+
+	return;
+}
+
+/*
+ * Launch apps that form the user's X session
+ */
+static void
+launch_user_session(void)
+{
+	char xhost_cmd[80];
+
+	dprintf("entering launch_user_session()");
+
+	setup_user_environment();
+
+	start_systemd_session();
+
+	/* finally, set local username to be allowed at any time,
+	 * which is not depenedent on hostname changes */
+	snprintf(xhost_cmd, 80, "/usr/bin/xhost +SI:localuser:%s",
+		 pass->pw_name);
+	if (system(xhost_cmd) != 0)
+		lprintf("%s failed", xhost_cmd);
+
+	dprintf("leaving launch_user_session()");
+}
+
+int main(int argc, char **argv)
+{
+	/*
+	 * General objective:
+	 * Do the things that need root privs first,
+	 * then switch to the final user ASAP.
+	 *
+	 * Once we're at the target user ID, we need
+	 * to start X since that's the critical element
+	 * from that point on.
+	 *
+	 * While X is starting, we can do the things
+	 * that we need to do as the user UID, but that
+	 * don't need X running yet.
+	 *
+	 * We then wait for X to signal that it's ready
+	 * to draw stuff.
+	 *
+	 * Once X is running, we set up the ConsoleKit session,
+	 * check if the screensaver needs to lock the screen
+	 * and then start the window manager.
+	 * After that we go over the autostart .desktop files
+	 * to launch the various autostart processes....
+	 * ... and we're done.
+	 */
+
+	pass = getpwnam(username);
+	
+	set_tty();
+
+	setup_xauth();
+
+	setup_pam_session();
+
+	switch_to_user();
+
+	start_X_server();
+
+	/*
+	 * These steps don't need X running
+	 * so can happen while X is talking to the
+	 * hardware
+	 */
+	wait_for_X_signal();
+
+	launch_user_session();
+
+	/*
+	 * The desktop session runs here
+	 */
+	wait_for_X_exit();
+
+	set_text_mode();
+
+	// close_consolekit_session();
+	close_pam_session();
+
+	unlink(xauth_cookie_file);
+
+	/* Make sure that we clean up after ourselves */
+	sleep(1);
+
+	lprintf("Terminating user-session and all children");
+	kill(0, SIGKILL);
+
+	return EXIT_SUCCESS;
+}