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/*
* 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"
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;
}
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