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seat.c
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seat.c
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/*
* Copyright (C) 2010-2011 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 <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include "seat.h"
#include "configuration.h"
#include "guest-account.h"
#include "greeter-session.h"
#include "session-config.h"
enum {
SESSION_ADDED,
RUNNING_USER_SESSION,
SESSION_REMOVED,
STOPPED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
typedef struct
{
/* XDG name for this seat */
gchar *name;
/* Configuration for this seat */
GHashTable *properties;
/* TRUE if this seat can run multiple sessions at once */
gboolean supports_multi_session;
/* TRUE if display server can be shared for sessions */
gboolean share_display_server;
/* The display servers on this seat */
GList *display_servers;
/* The sessions on this seat */
GList *sessions;
/* The last session set to active */
Session *active_session;
/* The session belonging to the active greeter user */
Session *next_session;
/* The session to set active when it starts */
Session *session_to_activate;
/* TRUE once we have started */
gboolean started;
/* TRUE if stopping this seat (waiting for displays to stop) */
gboolean stopping;
/* TRUE if stopped */
gboolean stopped;
/* The greeter to be started to replace the current one */
GreeterSession *replacement_greeter;
} SeatPrivate;
static void seat_logger_iface_init (LoggerInterface *iface);
G_DEFINE_TYPE_WITH_CODE (Seat, seat, G_TYPE_OBJECT,
G_ADD_PRIVATE (Seat)
G_IMPLEMENT_INTERFACE (
LOGGER_TYPE, seat_logger_iface_init))
typedef struct
{
gchar *name;
GType type;
} SeatModule;
static GHashTable *seat_modules = NULL;
// FIXME: Make a get_display_server() that re-uses display servers if supported
static DisplayServer *create_display_server (Seat *seat, Session *session);
static gboolean start_display_server (Seat *seat, DisplayServer *display_server);
static GreeterSession *create_greeter_session (Seat *seat);
static void start_session (Seat *seat, Session *session);
static void
free_seat_module (gpointer data)
{
SeatModule *module = data;
g_free (module->name);
g_free (module);
}
void
seat_register_module (const gchar *name, GType type)
{
if (!seat_modules)
seat_modules = g_hash_table_new_full (g_str_hash, g_str_equal, free_seat_module, NULL);
g_debug ("Registered seat module %s", name);
SeatModule *module = g_malloc0 (sizeof (SeatModule));
module->name = g_strdup (name);
module->type = type;
g_hash_table_insert (seat_modules, g_strdup (name), module);
}
Seat *
seat_new (const gchar *module_name)
{
g_return_val_if_fail (module_name != NULL, NULL);
SeatModule *m = NULL;
if (seat_modules)
m = g_hash_table_lookup (seat_modules, module_name);
if (!m)
return NULL;
return g_object_new (m->type, NULL);
}
void
seat_set_name (Seat *seat, const gchar *name)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_if_fail (seat != NULL);
g_free (priv->name);
priv->name = g_strdup (name);
}
void
seat_set_property (Seat *seat, const gchar *name, const gchar *value)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_if_fail (seat != NULL);
g_hash_table_insert (priv->properties, g_strdup (name), g_strdup (value));
}
const gchar *
seat_get_string_property (Seat *seat, const gchar *name)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_val_if_fail (seat != NULL, NULL);
return g_hash_table_lookup (priv->properties, name);
}
gchar **
seat_get_string_list_property (Seat *seat, const gchar *name)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_val_if_fail (seat != NULL, NULL);
return g_strsplit (g_hash_table_lookup (priv->properties, name), ";", 0);
}
gboolean
seat_get_boolean_property (Seat *seat, const gchar *name)
{
const gchar *value = seat_get_string_property (seat, name);
if (!value)
return FALSE;
/* Count the number of non-whitespace characters */
gint length = 0;
for (gint i = 0; value[i]; i++)
if (!g_ascii_isspace (value[i]))
length = i + 1;
return strncmp (value, "true", MAX (length, 4)) == 0;
}
gint
seat_get_integer_property (Seat *seat, const gchar *name)
{
const gchar *value = seat_get_string_property (seat, name);
return value ? atoi (value) : 0;
}
const gchar *
seat_get_name (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_val_if_fail (seat != NULL, NULL);
return priv->name;
}
void
seat_set_supports_multi_session (Seat *seat, gboolean supports_multi_session)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_if_fail (seat != NULL);
priv->supports_multi_session = supports_multi_session;
}
void
seat_set_share_display_server (Seat *seat, gboolean share_display_server)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_if_fail (seat != NULL);
priv->share_display_server = share_display_server;
}
gboolean
seat_start (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_val_if_fail (seat != NULL, FALSE);
l_debug (seat, "Starting");
SEAT_GET_CLASS (seat)->setup (seat);
priv->started = SEAT_GET_CLASS (seat)->start (seat);
return priv->started;
}
GList *
seat_get_sessions (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_val_if_fail (seat != NULL, NULL);
return priv->sessions;
}
static gboolean
set_greeter_idle (gpointer greeter)
{
greeter_idle (GREETER (greeter));
return FALSE;
}
void
seat_set_active_session (Seat *seat, Session *session)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_if_fail (seat != NULL);
SEAT_GET_CLASS (seat)->set_active_session (seat, session);
/* Stop any greeters */
for (GList *link = priv->sessions; link; link = link->next)
{
Session *s = link->data;
if (s == session || session_get_is_stopping (s))
continue;
if (IS_GREETER_SESSION (s))
{
Greeter *greeter = greeter_session_get_greeter (GREETER_SESSION (s));
if (greeter_get_resettable (greeter))
{
if (priv->active_session == s)
{
l_debug (seat, "Idling greeter");
/* Do this in an idle callback, because we might very well
be in the middle of responding to a START_SESSION
request by a greeter. So they won't expect an IDLE
call during that. Plus, this isn't time-sensitive. */
g_idle_add (set_greeter_idle, greeter);
}
}
else
{
l_debug (seat, "Stopping greeter");
session_stop (s);
}
}
}
/* Lock previous sessions */
if (priv->active_session && session != priv->active_session && !IS_GREETER_SESSION (priv->active_session))
session_lock (priv->active_session);
session_activate (session);
g_clear_object (&priv->active_session);
priv->active_session = g_object_ref (session);
}
Session *
seat_get_active_session (Seat *seat)
{
g_return_val_if_fail (seat != NULL, NULL);
return SEAT_GET_CLASS (seat)->get_active_session (seat);
}
Session *
seat_get_next_session (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_val_if_fail (seat != NULL, NULL);
return priv->next_session;
}
/**
* Obtains the active session which lightdm expects to be active.
*
* This function is different from seat_get_active_session() in that the
* later (in the case of local seats) dynamically finds the session that is
* really active (based on the active VT), whereas this function returns the
* session that lightdm activated last by itself, which may not be the actual
* active session (i.e. VT changes).
*/
Session *
seat_get_expected_active_session (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_val_if_fail (seat != NULL, NULL);
return priv->active_session;
}
/**
* Sets the active session which lightdm expects to be active.
*
* This function is different from seat_set_active_session() in that the
* later performs an actual session activation, whereas this function just
* updates the active session after the session has been activated by some
* means external to lightdm (i.e. VT changes).
*/
void
seat_set_externally_activated_session (Seat *seat, Session *session)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_if_fail (seat != NULL);
g_clear_object (&priv->active_session);
priv->active_session = g_object_ref (session);
}
Session *
seat_find_session_by_login1_id (Seat *seat, const gchar *login1_session_id)
{
SeatPrivate *priv = seat_get_instance_private (seat);
for (GList *session_link = priv->sessions; session_link; session_link = session_link->next)
{
Session *session = session_link->data;
if (g_strcmp0 (login1_session_id, session_get_login1_session_id (session)) == 0)
return session;
}
return NULL;
}
gboolean
seat_get_can_switch (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
g_return_val_if_fail (seat != NULL, FALSE);
return seat_get_boolean_property (seat, "allow-user-switching") && priv->supports_multi_session;
}
gboolean
seat_get_allow_guest (Seat *seat)
{
g_return_val_if_fail (seat != NULL, FALSE);
return seat_get_boolean_property (seat, "allow-guest") && guest_account_is_installed ();
}
static gboolean
run_script (Seat *seat, DisplayServer *display_server, const gchar *script_name, User *user)
{
g_autoptr(Process) script = process_new (NULL, NULL);
process_set_command (script, script_name);
/* Set POSIX variables */
process_set_clear_environment (script, TRUE);
process_set_env (script, "SHELL", "/bin/sh");
if (g_getenv ("LD_PRELOAD"))
process_set_env (script, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
if (g_getenv ("LD_LIBRARY_PATH"))
process_set_env (script, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
if (g_getenv ("PATH"))
process_set_env (script, "PATH", g_getenv ("PATH"));
/* Variables required for regression tests */
if (g_getenv ("LIGHTDM_TEST_ROOT"))
process_set_env (script, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
process_set_env (script, "XDG_SEAT", seat_get_name (seat));
if (user)
{
process_set_env (script, "USER", user_get_name (user));
process_set_env (script, "LOGNAME", user_get_name (user));
process_set_env (script, "HOME", user_get_home_directory (user));
}
else
process_set_env (script, "HOME", "/");
SEAT_GET_CLASS (seat)->run_script (seat, display_server, script);
gboolean result = FALSE;
if (process_start (script, TRUE))
{
int exit_status = process_get_exit_status (script);
if (WIFEXITED (exit_status))
{
l_debug (seat, "Exit status of %s: %d", script_name, WEXITSTATUS (exit_status));
result = WEXITSTATUS (exit_status) == EXIT_SUCCESS;
}
}
return result;
}
static void
seat_real_run_script (Seat *seat, DisplayServer *display_server, Process *process)
{
}
static void
emit_upstart_signal (const gchar *signal)
{
g_return_if_fail (signal != NULL);
g_return_if_fail (signal[0] != 0);
if (getuid () != 0)
return;
/* OK if it fails, probably not installed or not running upstart */
g_autoptr(GSubprocess) p = g_subprocess_new (G_SUBPROCESS_FLAGS_STDERR_SILENCE, NULL, "initctl", "-q", "emit", signal, "DISPLAY_MANAGER=lightdm", NULL);
}
static void
check_stopped (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
if (priv->stopping &&
!priv->stopped &&
g_list_length (priv->display_servers) == 0 &&
g_list_length (priv->sessions) == 0)
{
priv->stopped = TRUE;
l_debug (seat, "Stopped");
g_signal_emit (seat, signals[STOPPED], 0);
}
}
static void
display_server_stopped_cb (DisplayServer *display_server, Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
l_debug (seat, "Display server stopped");
/* Run a script right after stopping the display server */
const gchar *script = seat_get_string_property (seat, "display-stopped-script");
if (script)
run_script (seat, NULL, script, NULL);
g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
priv->display_servers = g_list_remove (priv->display_servers, display_server);
if (priv->stopping || !priv->started)
{
check_stopped (seat);
g_object_unref (display_server);
return;
}
/* Stop all sessions on this display server */
GList *list = g_list_copy (priv->sessions);
for (GList *link = list; link; link = link->next)
g_object_ref (link->data);
for (GList *link = list; link; link = link->next)
{
Session *session = link->data;
if (session_get_display_server (session) != display_server || session_get_is_stopping (session))
continue;
gboolean is_failed_greeter = IS_GREETER_SESSION (session) && !session_get_is_started (session);
l_debug (seat, "Stopping session");
session_stop (session);
/* Stop seat if this is the only display server and it failed to start a greeter */
if (is_failed_greeter &&
g_list_length (priv->display_servers) == 0)
{
l_debug (seat, "Stopping; greeter display server failed to start");
seat_stop (seat);
}
}
g_list_free_full (list, g_object_unref);
if (!priv->stopping)
{
/* If we were the active session, switch to a greeter */
Session *active_session = seat_get_active_session (seat);
if (!active_session || session_get_display_server (active_session) == display_server)
{
l_debug (seat, "Active display server stopped, starting greeter");
if (!seat_switch_to_greeter (seat))
{
l_debug (seat, "Stopping; failed to start a greeter");
seat_stop (seat);
}
}
}
g_object_unref (display_server);
}
static gboolean
can_share_display_server (Seat *seat, DisplayServer *display_server)
{
SeatPrivate *priv = seat_get_instance_private (seat);
return priv->share_display_server && display_server_get_can_share (display_server);
}
static GreeterSession *
find_greeter_session (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
for (GList *link = priv->sessions; link; link = link->next)
{
Session *session = link->data;
if (!session_get_is_stopping (session) && IS_GREETER_SESSION (session))
return GREETER_SESSION (session);
}
return NULL;
}
static GreeterSession *
find_resettable_greeter (Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
for (GList *link = priv->sessions; link; link = link->next)
{
Session *session = link->data;
if (!session_get_is_stopping (session) && IS_GREETER_SESSION (session) &&
greeter_get_resettable (greeter_session_get_greeter (GREETER_SESSION (session))))
return GREETER_SESSION (session);
}
return NULL;
}
static void
set_greeter_hints (Seat *seat, Greeter *greeter)
{
greeter_clear_hints (greeter);
greeter_set_hint (greeter, "default-session", seat_get_string_property (seat, "user-session"));
greeter_set_hint (greeter, "hide-users", seat_get_boolean_property (seat, "greeter-hide-users") ? "true" : "false");
greeter_set_hint (greeter, "show-manual-login", seat_get_boolean_property (seat, "greeter-show-manual-login") ? "true" : "false");
greeter_set_hint (greeter, "show-remote-login", seat_get_boolean_property (seat, "greeter-show-remote-login") ? "true" : "false");
greeter_set_hint (greeter, "has-guest-account", seat_get_allow_guest (seat) && seat_get_boolean_property (seat, "greeter-allow-guest") ? "true" : "false");
}
static void
switch_to_greeter_from_failed_session (Seat *seat, Session *session)
{
SeatPrivate *priv = seat_get_instance_private (seat);
/* Switch to greeter if one open */
GreeterSession *greeter_session = find_resettable_greeter (seat);
gboolean existing = FALSE;
if (greeter_session)
{
l_debug (seat, "Switching to existing greeter");
set_greeter_hints (seat, greeter_session_get_greeter (greeter_session));
existing = TRUE;
}
else
{
greeter_session = create_greeter_session (seat);
}
Greeter *greeter = greeter_session_get_greeter (greeter_session);
if (session_get_is_guest (session))
greeter_set_hint (greeter, "select-guest", "true");
else
greeter_set_hint (greeter, "select-user", session_get_username (session));
if (existing)
{
greeter_reset (greeter);
seat_set_active_session (seat, SESSION (greeter_session));
}
else
{
g_clear_object (&priv->session_to_activate);
priv->session_to_activate = g_object_ref (SESSION (greeter_session));
if (can_share_display_server (seat, session_get_display_server (session)))
session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
else
{
DisplayServer *display_server = create_display_server (seat, session);
session_set_display_server (session, display_server);
if (!start_display_server (seat, display_server))
{
l_debug (seat, "Failed to start display server for greeter");
seat_stop (seat);
}
}
start_session (seat, SESSION (greeter_session));
}
/* Stop failed session */
session_stop (session);
}
static void
start_session (Seat *seat, Session *session)
{
/* Use system location for greeter log file */
if (IS_GREETER_SESSION (session))
{
g_autofree gchar *log_dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
g_autofree gchar *filename = g_strdup_printf ("%s-greeter.log", seat_get_name (seat));
g_autofree gchar *log_filename = g_build_filename (log_dir, filename, NULL);
gboolean backup_logs = config_get_boolean (config_get_instance (), "LightDM", "backup-logs");
session_set_log_file (session, log_filename, backup_logs ? LOG_MODE_BACKUP_AND_TRUNCATE : LOG_MODE_APPEND);
}
if (session_start (session))
return;
if (IS_GREETER_SESSION (session))
{
l_debug (seat, "Failed to start greeter");
display_server_stop (session_get_display_server (session));
return;
}
l_debug (seat, "Failed to start session, starting greeter");
switch_to_greeter_from_failed_session (seat, session);
}
static void
run_session (Seat *seat, Session *session)
{
SeatPrivate *priv = seat_get_instance_private (seat);
const gchar *script;
if (IS_GREETER_SESSION (session))
script = seat_get_string_property (seat, "greeter-setup-script");
else
script = seat_get_string_property (seat, "session-setup-script");
if (script && !run_script (seat, session_get_display_server (session), script, session_get_user (session)))
{
l_debug (seat, "Switching to greeter due to failed setup script");
switch_to_greeter_from_failed_session (seat, session);
return;
}
if (!IS_GREETER_SESSION (session))
{
g_signal_emit (seat, signals[RUNNING_USER_SESSION], 0, session);
emit_upstart_signal ("desktop-session-start");
}
session_run (session);
// FIXME: Wait until the session is ready
if (session == priv->session_to_activate)
{
seat_set_active_session (seat, session);
g_clear_object (&priv->session_to_activate);
}
else if (priv->active_session)
{
/* Multiple sessions can theoretically be on the same VT (especially
if using Mir). If a new session appears on an existing active VT,
logind will mark it as active, while ConsoleKit will re-mark the
oldest session as active. In either case, that may not be the
session that we want to be active. So let's be explicit and
re-activate the correct session whenever a new session starts.
There's no harm to do this in seats that enforce separate VTs. */
session_activate (priv->active_session);
}
}
static Session *
find_user_session (Seat *seat, const gchar *username, Session *ignore_session)
{
SeatPrivate *priv = seat_get_instance_private (seat);
if (!username)
return NULL;
for (GList *link = priv->sessions; link; link = link->next)
{
Session *session = link->data;
if (session == ignore_session)
continue;
if (!session_get_is_stopping (session) && g_strcmp0 (session_get_username (session), username) == 0)
return session;
}
return NULL;
}
static void
greeter_active_username_changed_cb (Greeter *greeter, GParamSpec *pspec, Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
Session *session = find_user_session (seat, greeter_get_active_username (greeter), priv->active_session);
g_clear_object (&priv->next_session);
priv->next_session = session ? g_object_ref (session) : NULL;
SEAT_GET_CLASS (seat)->set_next_session (seat, session);
}
static void
session_authentication_complete_cb (Session *session, Seat *seat)
{
if (session_get_is_authenticated (session))
{
Session *s = find_user_session (seat, session_get_username (session), session);
if (s)
{
l_debug (seat, "Session authenticated, switching to existing user session");
seat_set_active_session (seat, s);
session_stop (session);
}
else
{
l_debug (seat, "Session authenticated, running command");
run_session (seat, session);
}
}
else if (!IS_GREETER_SESSION (session))
{
l_debug (seat, "Switching to greeter due to failed authentication");
switch_to_greeter_from_failed_session (seat, session);
}
else
{
l_debug (seat, "Stopping session that failed authentication");
session_stop (session);
}
}
static void
session_stopped_cb (Session *session, Seat *seat)
{
SeatPrivate *priv = seat_get_instance_private (seat);
l_debug (seat, "Session stopped");
g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
priv->sessions = g_list_remove (priv->sessions, session);
if (session == priv->active_session)
g_clear_object (&priv->active_session);
if (session == priv->next_session)
g_clear_object (&priv->next_session);
if (session == priv->session_to_activate)
g_clear_object (&priv->session_to_activate);
DisplayServer *display_server = session_get_display_server (session);
/* Cleanup */
if (!IS_GREETER_SESSION (session))
{
const gchar *script = seat_get_string_property (seat, "session-cleanup-script");
if (script)
run_script (seat, display_server, script, session_get_user (session));
}
/* We were waiting for this session, but it didn't start :( */
// FIXME: Start a greeter on this?
if (session == priv->session_to_activate)
g_clear_object (&priv->session_to_activate);
if (priv->stopping)
{
check_stopped (seat);
g_object_unref (session);
return;
}
/* If there is a pending replacement greeter, start it */
if (IS_GREETER_SESSION (session) && priv->replacement_greeter)
{
GreeterSession *replacement_greeter = priv->replacement_greeter;
priv->replacement_greeter = NULL;
if (session_get_is_authenticated (SESSION (replacement_greeter)))
{
l_debug (seat, "Greeter stopped, running session");
run_session (seat, SESSION (replacement_greeter));
}
else
{
l_debug (seat, "Greeter stopped, starting session authentication");
start_session (seat, SESSION (replacement_greeter));
}
g_object_unref (replacement_greeter);
}
/* If this is the greeter session then re-use this display server */
else if (IS_GREETER_SESSION (session) &&
can_share_display_server (seat, display_server) &&
greeter_get_start_session (greeter_session_get_greeter (GREETER_SESSION (session))))
{
for (GList *link = priv->sessions; link; link = link->next)
{
Session *s = link->data;
/* Skip this session and sessions on other display servers */
if (s == session || session_get_display_server (s) != display_server || session_get_is_stopping (s))
continue;
if (session_get_is_authenticated (s))
{
l_debug (seat, "Greeter stopped, running session");
run_session (seat, s);
}
else
{
l_debug (seat, "Greeter stopped, starting session authentication");
start_session (seat, s);
}
break;
}
}
/* If this is the greeter and nothing else is running then stop the seat */
else if (IS_GREETER_SESSION (session) &&
!greeter_get_start_session (greeter_session_get_greeter (GREETER_SESSION (session))) &&
g_list_length (priv->display_servers) == 1 &&
g_list_nth_data (priv->display_servers, 0) == display_server)
{
l_debug (seat, "Stopping; failed to start a greeter");
seat_stop (seat);
}
/* If we were the active session, switch to a greeter */
else if (!IS_GREETER_SESSION (session) && session == seat_get_active_session (seat))
{
l_debug (seat, "Active session stopped, starting greeter");
if (!seat_switch_to_greeter (seat))
{
l_debug (seat, "Stopping; failed to start a greeter");
seat_stop (seat);
}
}
g_signal_emit (seat, signals[SESSION_REMOVED], 0, session);
g_object_unref (session);
/* Stop the display server if no-longer required */
if (display_server && !display_server_get_is_stopping (display_server) &&
!SEAT_GET_CLASS (seat)->display_server_is_used (seat, display_server))
{
l_debug (seat, "Stopping display server, no sessions require it");
display_server_stop (display_server);
}
}
static void
set_session_env (Session *session)
{
/* Connect using the session bus */
if (getuid () != 0)
{
if (g_getenv ("DBUS_SESSION_BUS_ADDRESS"))
session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
session_set_env (session, "LDM_BUS", "SESSION");
}
/* Variables required for regression tests */
if (g_getenv ("LIGHTDM_TEST_ROOT"))
{
session_set_env (session, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
session_set_env (session, "DBUS_SYSTEM_BUS_ADDRESS", g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
session_set_env (session, "GI_TYPELIB_PATH", g_getenv ("GI_TYPELIB_PATH"));
}
if (g_getenv ("LD_PRELOAD"))
session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
if (g_getenv ("LD_LIBRARY_PATH"))
session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
}
static Session *
create_session (Seat *seat, gboolean autostart)
{
SeatPrivate *priv = seat_get_instance_private (seat);
Session *session = SEAT_GET_CLASS (seat)->create_session (seat);
priv->sessions = g_list_append (priv->sessions, session);
if (autostart)
g_signal_connect (session, SESSION_SIGNAL_AUTHENTICATION_COMPLETE, G_CALLBACK (session_authentication_complete_cb), seat);
g_signal_connect (session, SESSION_SIGNAL_STOPPED, G_CALLBACK (session_stopped_cb), seat);
set_session_env (session);
g_signal_emit (seat, signals[SESSION_ADDED], 0, session);
return session;
}
static gchar **
get_session_argv (Seat *seat, SessionConfig *session_config, const gchar *session_wrapper)
{
/* If configured, run sessions through a wrapper */
if (session_wrapper)
{
gchar **argv = g_malloc (sizeof (gchar *) * 3);
g_autofree gchar *path = g_find_program_in_path (session_wrapper);
argv[0] = path ? g_steal_pointer (&path) : g_strdup (session_wrapper);
argv[1] = g_strdup (session_config_get_command (session_config));
argv[2] = NULL;
return argv;
}
/* Split command into an array listing and make command absolute */
int argc;
g_auto(GStrv) argv = NULL;
g_autoptr(GError) error = NULL;
gboolean result = g_shell_parse_argv (session_config_get_command (session_config), &argc, &argv, &error);
if (error)
l_debug (seat, "Invalid session command '%s': %s", session_config_get_command (session_config), error->message);
if (!result)
return NULL;
g_autofree gchar *path = g_find_program_in_path (argv[0]);
if (path)
{
g_free (argv[0]);
argv[0] = g_steal_pointer (&path);
}
return g_steal_pointer (&argv);
}
static SessionConfig *
find_session_config (Seat *seat, const gchar *sessions_dir, const gchar *session_name)
{
g_return_val_if_fail (sessions_dir != NULL, NULL);
g_return_val_if_fail (session_name != NULL, NULL);
g_auto(GStrv) dirs = g_strsplit (sessions_dir, ":", -1);
for (int i = 0; dirs[i]; i++)
{
const gchar *default_session_type = "x";
if (strcmp (dirs[i], WAYLAND_SESSIONS_DIR) == 0)
default_session_type = "wayland";
g_autofree gchar *filename = g_strdup_printf ("%s.desktop", session_name);
g_autofree gchar *path = g_build_filename (dirs[i], filename, NULL);
g_autoptr(GError) error = NULL;
SessionConfig *session_config = session_config_new_from_file (path, default_session_type, &error);
if (session_config)
return session_config;
}
l_debug (seat, "Failed to find session configuration %s", session_name);
return NULL;
}
static void
configure_session (Session *session, SessionConfig *config, const gchar *session_name, const gchar *language)
{
session_set_config (session, config);
session_set_env (session, "XDG_SESSION_DESKTOP", session_name);
session_set_env (session, "DESKTOP_SESSION", session_name);
session_set_env (session, "GDMSESSION", session_name);
gchar **desktop_names = session_config_get_desktop_names (config);
if (desktop_names)
{
g_autofree gchar *value = g_strjoinv (":", desktop_names);
session_set_env (session, "XDG_CURRENT_DESKTOP", value);
}
if (language && language[0] != '\0')
{
session_set_env (session, "LANG", language);
session_set_env (session, "GDM_LANG", language);
}
}
static Session *
create_user_session (Seat *seat, const gchar *username, gboolean autostart)
{
l_debug (seat, "Creating user session");
/* Load user preferences */