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/*
* Copyright (C) 2010 Robert Ancell.
* Author: Robert Ancell <robert.ancell@canonical.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, either version 3 of the License, or (at your option) any later
* version. See http://www.gnu.org/copyleft/gpl.html the full text of the
* license.
*/
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <glib.h>
#include <glib/gi18n.h>
#include <unistd.h>
#include <dbus/dbus-glib-bindings.h>
#include "display-manager.h"
#include "user-manager.h"
#include "xserver.h"
static DBusGConnection *bus = NULL;
static GKeyFile *config_file = NULL;
static const gchar *config_path = CONFIG_FILE;
static const gchar *pid_path = "/var/run/lightdm.pid";
static GMainLoop *loop = NULL;
static gboolean test_mode = FALSE;
static GTimer *log_timer;
static FILE *log_file;
static gboolean debug = FALSE;
static DisplayManager *display_manager = NULL;
#define LDM_BUS_NAME "org.lightdm.LightDisplayManager"
static void
version (void)
{
/* NOTE: Is not translated so can be easily parsed */
g_printerr ("%s %s\n", LIGHTDM_BINARY, VERSION);
}
static void
usage (void)
{
g_printerr (/* Description on how to use Light Display Manager displayed on command-line */
_("Usage:\n"
" %s - Display Manager"), LIGHTDM_BINARY);
g_printerr ("\n\n");
g_printerr (/* Description on how to use Light Display Manager displayed on command-line */
_("Help Options:\n"
" -c, --config <file> Use configuration file\n"
" --pid-file <file> File to write PID into\n"
" -d, --debug Print debugging messages\n"
" --test-mode Run as unprivileged user\n"
" -v, --version Show release version\n"
" -h, --help Show help options"));
g_printerr ("\n\n");
}
static void
get_options (int argc, char **argv)
{
int i;
for (i = 1; i < argc; i++)
{
char *arg = argv[i];
if (strcmp (arg, "-c") == 0 ||
strcmp (arg, "--config") == 0) {
i++;
if (i == argc)
{
usage ();
exit (1);
}
config_path = argv[i];
}
else if (strcmp (arg, "--pid-file") == 0)
{
i++;
if (i == argc)
{
usage ();
exit (1);
}
pid_path = argv[i];
}
else if (strcmp (arg, "-d") == 0 ||
strcmp (arg, "--debug") == 0) {
debug = TRUE;
}
else if (strcmp (arg, "--test-mode") == 0) {
test_mode = TRUE;
}
else if (strcmp (arg, "-v") == 0 ||
strcmp (arg, "--version") == 0)
{
version ();
exit (0);
}
else if (strcmp (arg, "-h") == 0 ||
strcmp (arg, "--help") == 0)
{
usage ();
exit (0);
}
else
{
g_printerr ("Unknown argument: '%s'\n", arg);
exit (1);
}
}
}
static DBusGConnection *
start_dbus (void)
{
DBusGConnection *bus;
DBusGProxy *proxy;
guint result;
GError *error = NULL;
bus = dbus_g_bus_get (test_mode ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error);
if (!bus)
{
if (test_mode)
g_critical ("Failed to get session bus: %s", error->message);
else
g_critical ("Failed to get system bus: %s", error->message);
return NULL;
}
g_clear_error (&error);
proxy = dbus_g_proxy_new_for_name (bus,
DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS);
if (!org_freedesktop_DBus_request_name (proxy,
LDM_BUS_NAME,
DBUS_NAME_FLAG_DO_NOT_QUEUE, &result, &error))
{
if (g_error_matches (error, DBUS_GERROR, DBUS_GERROR_ACCESS_DENIED))
g_printerr ("Not authorised to use bus name " LDM_BUS_NAME ", do you have appropriate permissions?\n");
else
g_printerr ("Failed to register D-Bus name: %s\n", error->message);
exit (1);
}
if (result != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
{
g_printerr ("Light Display Manager already running\n");
exit (1);
}
g_object_unref (proxy);
return bus;
}
static void
load_config (void)
{
GError *error = NULL;
config_file = g_key_file_new ();
if (!g_key_file_load_from_file (config_file, config_path, G_KEY_FILE_NONE, &error))
g_warning ("Failed to load configuration from %s: %s", config_path, error->message); // FIXME: Don't make warning on no file, just info
g_clear_error (&error);
if (test_mode)
{
gchar *path;
g_key_file_set_boolean (config_file, "LightDM", "test-mode", TRUE);
path = g_build_filename (g_get_user_cache_dir (), "lightdm", "authority", NULL);
g_key_file_set_string (config_file, "LightDM", "authorization-directory", path);
g_free (path);
path = g_build_filename (g_get_user_cache_dir (), "lightdm", NULL);
g_key_file_set_string (config_file, "LightDM", "log-directory", path);
g_free (path);
}
}
static void
log_cb (const gchar *log_domain, GLogLevelFlags log_level,
const gchar *message, gpointer data)
{
/* Log everything to a file */
if (log_file) {
const gchar *prefix;
switch (log_level & G_LOG_LEVEL_MASK) {
case G_LOG_LEVEL_ERROR:
prefix = "ERROR:";
break;
case G_LOG_LEVEL_CRITICAL:
prefix = "CRITICAL:";
break;
case G_LOG_LEVEL_WARNING:
prefix = "WARNING:";
break;
case G_LOG_LEVEL_MESSAGE:
prefix = "MESSAGE:";
break;
case G_LOG_LEVEL_INFO:
prefix = "INFO:";
break;
case G_LOG_LEVEL_DEBUG:
prefix = "DEBUG:";
break;
default:
prefix = "LOG:";
break;
}
fprintf (log_file, "[%+.2fs] %s %s\n", g_timer_elapsed (log_timer, NULL), prefix, message);
fflush (log_file);
}
/* Only show debug if requested */
if (log_level & G_LOG_LEVEL_DEBUG) {
if (debug)
g_log_default_handler (log_domain, log_level, message, data);
}
else
g_log_default_handler (log_domain, log_level, message, data);
}
static void
log_init (void)
{
gchar *log_dir, *path;
log_timer = g_timer_new ();
/* Log to a file */
log_dir = g_key_file_get_string (config_file, "LightDM", "log-directory", NULL);
if (!log_dir)
log_dir = g_strdup (LOG_DIR);
g_mkdir_with_parents (log_dir, 0755);
path = g_build_filename (log_dir, "lightdm.log", NULL);
g_free (log_dir);
log_file = fopen (path, "w");
g_log_set_default_handler (log_cb, NULL);
g_debug ("Logging to %s", path);
g_free (path);
}
static void
signal_cb (ChildProcess *process, int signum)
{
g_debug ("Caught %s signal, exiting", g_strsignal (signum));
g_object_unref (display_manager);
g_main_loop_quit (loop);
}
int
main(int argc, char **argv)
{
FILE *pid_file;
UserManager *user_manager;
g_thread_init (NULL);
g_type_init ();
g_signal_connect (child_process_get_parent (), "got-signal", G_CALLBACK (signal_cb), NULL);
get_options (argc, argv);
/* Write PID file */
pid_file = fopen (pid_path, "w");
if (pid_file)
{
fprintf (pid_file, "%d\n", getpid ());
fclose (pid_file);
}
/* Check if root */
if (!test_mode && getuid () != 0)
{
g_printerr ("Only root can run Light Display Manager\n");
return 1;
}
bus = start_dbus ();
if (!bus)
return 1;
// Change working directory?
loop = g_main_loop_new (NULL, FALSE);
load_config ();
log_init ();
g_debug ("Starting Light Display Manager %s, PID=%i", VERSION, getpid ());
g_debug ("Loaded configuration from %s", config_path);
user_manager = user_manager_new (config_file);
dbus_g_connection_register_g_object (bus, "/org/lightdm/LightDisplayManager/Users", G_OBJECT (user_manager));
display_manager = display_manager_new (config_file);
dbus_g_connection_register_g_object (bus, "/org/lightdm/LightDisplayManager", G_OBJECT (display_manager));
display_manager_start (display_manager);
g_main_loop_run (loop);
return 0;
}
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