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gnome-shell/src/gdmuser/gdm-user-manager.c
Dan Winship 9ddebf0480 Introspect src/gdmuser 
In addition to the Makefile changes, we also change uid_t to gulong in
the public API (which matches how it was already represented in the
gobject properties).

https://bugzilla.gnome.org/show_bug.cgi?id=601458
2009-11-13 14:20:45 -05:00

1669 lines
53 KiB
C
Raw Blame History

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
*
* Copyright (C) 2007-2008 William Jon McCann <mccann@jhu.edu>
*
* 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 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif /* HAVE_PATHS_H */
#include <glib.h>
/* Note on sync with gdm; need to use -lib here */
#include <glib/gi18n-lib.h>
#include <glib/gstdio.h>
#include <glib-object.h>
#include <gio/gio.h>
#include <dbus/dbus.h>
#include <dbus/dbus-glib.h>
#include <dbus/dbus-glib-lowlevel.h>
#include "gdm-user-manager.h"
#include "gdm-user-private.h"
#define GDM_USER_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_USER_MANAGER, GdmUserManagerPrivate))
#define CK_NAME "org.freedesktop.ConsoleKit"
#define CK_PATH "/org/freedesktop/ConsoleKit"
#define CK_INTERFACE "org.freedesktop.ConsoleKit"
#define CK_MANAGER_PATH "/org/freedesktop/ConsoleKit/Manager"
#define CK_MANAGER_INTERFACE "org.freedesktop.ConsoleKit.Manager"
#define CK_SEAT_INTERFACE "org.freedesktop.ConsoleKit.Seat"
#define CK_SESSION_INTERFACE "org.freedesktop.ConsoleKit.Session"
/* Prefs Defaults */
#define DEFAULT_ALLOW_ROOT TRUE
#define DEFAULT_MAX_ICON_SIZE 128
#define DEFAULT_USER_MAX_FILE 65536
#ifdef __sun
#define DEFAULT_MINIMAL_UID 100
#else
#define DEFAULT_MINIMAL_UID 500
#endif
#ifndef _PATH_SHELLS
#define _PATH_SHELLS "/etc/shells"
#endif
#define PATH_PASSWD "/etc/passwd"
#define DEFAULT_GLOBAL_FACE_DIR DATADIR "/faces"
#define DEFAULT_USER_ICON "stock_person"
#define DEFAULT_EXCLUDE { "bin", \
"root", \
"daemon", \
"adm", \
"lp", \
"sync", \
"shutdown", \
"halt", \
"mail", \
"news", \
"uucp", \
"operator", \
"nobody", \
"gdm", \
"postgres", \
"pvm", \
"rpm", \
"nfsnobody", \
"pcap", \
NULL }
struct GdmUserManagerPrivate
{
GHashTable *users;
GHashTable *sessions;
GHashTable *exclusions;
GHashTable *shells;
DBusGConnection *connection;
DBusGProxy *seat_proxy;
char *seat_id;
GFileMonitor *passwd_monitor;
GFileMonitor *shells_monitor;
guint reload_id;
guint ck_history_id;
guint8 users_dirty : 1;
};
enum {
LOADING_USERS,
USERS_LOADED,
USER_ADDED,
USER_REMOVED,
USER_IS_LOGGED_IN_CHANGED,
USER_LOGIN_FREQUENCY_CHANGED,
LAST_SIGNAL
};
static guint signals [LAST_SIGNAL] = { 0, };
static void gdm_user_manager_class_init (GdmUserManagerClass *klass);
static void gdm_user_manager_init (GdmUserManager *user_manager);
static void gdm_user_manager_finalize (GObject *object);
static gpointer user_manager_object = NULL;
G_DEFINE_TYPE (GdmUserManager, gdm_user_manager, G_TYPE_OBJECT)
GQuark
gdm_user_manager_error_quark (void)
{
static GQuark ret = 0;
if (ret == 0) {
ret = g_quark_from_static_string ("gdm_user_manager_error");
}
return ret;
}
static gboolean
start_new_login_session (GdmUserManager *manager)
{
GError *error;
gboolean res;
res = g_spawn_command_line_async ("gdmflexiserver -s", &error);
if (! res) {
g_warning ("Unable to start new login: %s", error->message);
g_error_free (error);
}
return res;
}
/* needs to stay in sync with gdm-slave */
static char *
_get_primary_user_session_id (GdmUserManager *manager,
GdmUser *user)
{
gboolean res;
gboolean can_activate_sessions;
GError *error;
GList *sessions;
GList *l;
char *primary_ssid;
if (manager->priv->seat_id == NULL || manager->priv->seat_id[0] == '\0') {
g_debug ("GdmUserManager: display seat id is not set; can't switch sessions");
return NULL;
}
primary_ssid = NULL;
sessions = NULL;
g_debug ("GdmUserManager: checking if seat can activate sessions");
error = NULL;
res = dbus_g_proxy_call (manager->priv->seat_proxy,
"CanActivateSessions",
&error,
G_TYPE_INVALID,
G_TYPE_BOOLEAN, &can_activate_sessions,
G_TYPE_INVALID);
if (! res) {
g_warning ("unable to determine if seat can activate sessions: %s",
error->message);
g_error_free (error);
goto out;
}
if (! can_activate_sessions) {
g_debug ("GdmUserManager: seat is unable to activate sessions");
goto out;
}
sessions = gdm_user_get_sessions (user);
if (sessions == NULL) {
g_warning ("unable to determine sessions for user: %s",
gdm_user_get_user_name (user));
goto out;
}
for (l = sessions; l != NULL; l = l->next) {
const char *ssid;
ssid = l->data;
/* FIXME: better way to choose? */
if (ssid != NULL) {
primary_ssid = g_strdup (ssid);
break;
}
}
out:
return primary_ssid;
}
static gboolean
activate_session_id (GdmUserManager *manager,
const char *seat_id,
const char *session_id)
{
DBusError local_error;
DBusMessage *message;
DBusMessage *reply;
gboolean ret;
ret = FALSE;
reply = NULL;
dbus_error_init (&local_error);
message = dbus_message_new_method_call ("org.freedesktop.ConsoleKit",
seat_id,
"org.freedesktop.ConsoleKit.Seat",
"ActivateSession");
if (message == NULL) {
goto out;
}
if (! dbus_message_append_args (message,
DBUS_TYPE_OBJECT_PATH, &session_id,
DBUS_TYPE_INVALID)) {
goto out;
}
dbus_error_init (&local_error);
reply = dbus_connection_send_with_reply_and_block (dbus_g_connection_get_connection (manager->priv->connection),
message,
-1,
&local_error);
if (reply == NULL) {
if (dbus_error_is_set (&local_error)) {
g_warning ("Unable to activate session: %s", local_error.message);
dbus_error_free (&local_error);
goto out;
}
}
ret = TRUE;
out:
if (message != NULL) {
dbus_message_unref (message);
}
if (reply != NULL) {
dbus_message_unref (reply);
}
return ret;
}
static gboolean
session_is_login_window (GdmUserManager *manager,
const char *session_id)
{
DBusGProxy *proxy;
GError *error;
gboolean res;
gboolean ret;
char *session_type;
ret = FALSE;
proxy = dbus_g_proxy_new_for_name (manager->priv->connection,
CK_NAME,
session_id,
CK_SESSION_INTERFACE);
if (proxy == NULL) {
g_warning ("Failed to connect to the ConsoleKit seat object");
goto out;
}
session_type = NULL;
error = NULL;
res = dbus_g_proxy_call (proxy,
"GetSessionType",
&error,
G_TYPE_INVALID,
G_TYPE_STRING, &session_type,
G_TYPE_INVALID);
if (! res) {
g_debug ("Failed to identify the session type: %s", error->message);
g_error_free (error);
goto out;
}
if (session_type == NULL || session_type[0] == '\0' || strcmp (session_type, "LoginWindow") != 0) {
goto out;
}
ret = TRUE;
out:
if (proxy != NULL) {
g_object_unref (proxy);
}
return ret;
}
static char *
_get_login_window_session_id (GdmUserManager *manager)
{
gboolean res;
gboolean can_activate_sessions;
GError *error;
GPtrArray *sessions;
char *primary_ssid;
int i;
if (manager->priv->seat_id == NULL || manager->priv->seat_id[0] == '\0') {
g_debug ("GdmUserManager: display seat id is not set; can't switch sessions");
return NULL;
}
primary_ssid = NULL;
sessions = NULL;
g_debug ("GdmSlave: checking if seat can activate sessions");
error = NULL;
res = dbus_g_proxy_call (manager->priv->seat_proxy,
"CanActivateSessions",
&error,
G_TYPE_INVALID,
G_TYPE_BOOLEAN, &can_activate_sessions,
G_TYPE_INVALID);
if (! res) {
g_warning ("unable to determine if seat can activate sessions: %s",
error->message);
g_error_free (error);
goto out;
}
if (! can_activate_sessions) {
g_debug ("GdmSlave: seat is unable to activate sessions");
goto out;
}
error = NULL;
res = dbus_g_proxy_call (manager->priv->seat_proxy,
"GetSessions",
&error,
G_TYPE_INVALID,
dbus_g_type_get_collection ("GPtrArray", DBUS_TYPE_G_OBJECT_PATH), &sessions,
G_TYPE_INVALID);
if (! res) {
g_warning ("unable to determine sessions for user: %s",
error->message);
g_error_free (error);
goto out;
}
for (i = 0; i < sessions->len; i++) {
char *ssid;
ssid = g_ptr_array_index (sessions, i);
if (session_is_login_window (manager, ssid)) {
primary_ssid = g_strdup (ssid);
break;
}
}
g_ptr_array_foreach (sessions, (GFunc)g_free, NULL);
g_ptr_array_free (sessions, TRUE);
out:
return primary_ssid;
}
gboolean
gdm_user_manager_goto_login_session (GdmUserManager *manager)
{
gboolean ret;
gboolean res;
char *ssid;
g_return_val_if_fail (GDM_IS_USER_MANAGER (manager), FALSE);
ret = FALSE;
/* First look for any existing LoginWindow sessions on the seat.
If none are found, create a new one. */
ssid = _get_login_window_session_id (manager);
if (ssid != NULL) {
res = activate_session_id (manager, manager->priv->seat_id, ssid);
if (res) {
ret = TRUE;
}
}
if (! ret) {
res = start_new_login_session (manager);
if (res) {
ret = TRUE;
}
}
return ret;
}
gboolean
gdm_user_manager_activate_user_session (GdmUserManager *manager,
GdmUser *user)
{
gboolean ret;
char *ssid;
gboolean res;
g_return_val_if_fail (GDM_IS_USER_MANAGER (manager), FALSE);
g_return_val_if_fail (GDM_IS_USER (user), FALSE);
ret = FALSE;
ssid = _get_primary_user_session_id (manager, user);
if (ssid == NULL) {
goto out;
}
res = activate_session_id (manager, manager->priv->seat_id, ssid);
if (! res) {
g_debug ("GdmUserManager: unable to activate session: %s", ssid);
goto out;
}
ret = TRUE;
out:
return ret;
}
static void
on_user_sessions_changed (GdmUser *user,
GdmUserManager *manager)
{
guint nsessions;
nsessions = gdm_user_get_num_sessions (user);
g_debug ("GdmUserManager: sessions changed user=%s num=%d",
gdm_user_get_user_name (user),
nsessions);
/* only signal on zero and one */
if (nsessions > 1) {
return;
}
g_signal_emit (manager, signals [USER_IS_LOGGED_IN_CHANGED], 0, user);
}
static void
on_user_icon_changed (GdmUser *user,
GdmUserManager *manager)
{
g_debug ("GdmUserManager: user icon changed");
}
static char *
get_seat_id_for_session (DBusGConnection *connection,
const char *session_id)
{
DBusGProxy *proxy;
GError *error;
char *seat_id;
gboolean res;
proxy = NULL;
seat_id = NULL;
proxy = dbus_g_proxy_new_for_name (connection,
CK_NAME,
session_id,
CK_SESSION_INTERFACE);
if (proxy == NULL) {
g_warning ("Failed to connect to the ConsoleKit session object");
goto out;
}
error = NULL;
res = dbus_g_proxy_call (proxy,
"GetSeatId",
&error,
G_TYPE_INVALID,
DBUS_TYPE_G_OBJECT_PATH, &seat_id,
G_TYPE_INVALID);
if (! res) {
g_debug ("Failed to identify the current seat: %s", error->message);
g_error_free (error);
}
out:
if (proxy != NULL) {
g_object_unref (proxy);
}
return seat_id;
}
static char *
get_x11_display_for_session (DBusGConnection *connection,
const char *session_id)
{
DBusGProxy *proxy;
GError *error;
char *x11_display;
gboolean res;
proxy = NULL;
x11_display = NULL;
proxy = dbus_g_proxy_new_for_name (connection,
CK_NAME,
session_id,
CK_SESSION_INTERFACE);
if (proxy == NULL) {
g_warning ("Failed to connect to the ConsoleKit session object");
goto out;
}
error = NULL;
res = dbus_g_proxy_call (proxy,
"GetX11Display",
&error,
G_TYPE_INVALID,
G_TYPE_STRING, &x11_display,
G_TYPE_INVALID);
if (! res) {
g_debug ("Failed to identify the x11 display: %s", error->message);
g_error_free (error);
}
out:
if (proxy != NULL) {
g_object_unref (proxy);
}
return x11_display;
}
static gboolean
maybe_add_session_for_user (GdmUserManager *manager,
GdmUser *user,
const char *ssid)
{
char *sid;
char *x11_display;
gboolean ret;
ret = FALSE;
sid = NULL;
x11_display = NULL;
/* skip if on another seat */
sid = get_seat_id_for_session (manager->priv->connection, ssid);
if (sid == NULL
|| manager->priv->seat_id == NULL
|| strcmp (sid, manager->priv->seat_id) != 0) {
g_debug ("GdmUserManager: not adding session on other seat: %s", ssid);
goto out;
}
/* skip if doesn't have an x11 display */
x11_display = get_x11_display_for_session (manager->priv->connection, ssid);
if (x11_display == NULL || x11_display[0] == '\0') {
g_debug ("GdmUserManager: not adding session without a x11 display: %s", ssid);
goto out;
}
if (g_hash_table_lookup (manager->priv->exclusions, gdm_user_get_user_name (user))) {
g_debug ("GdmUserManager: excluding user '%s'", gdm_user_get_user_name (user));
goto out;
}
g_hash_table_insert (manager->priv->sessions,
g_strdup (ssid),
g_strdup (gdm_user_get_user_name (user)));
_gdm_user_add_session (user, ssid);
g_debug ("GdmUserManager: added session for user: %s", gdm_user_get_user_name (user));
ret = TRUE;
out:
g_free (sid);
g_free (x11_display);
return ret;
}
static void
add_sessions_for_user (GdmUserManager *manager,
GdmUser *user)
{
DBusGProxy *proxy;
GError *error;
gboolean res;
guint32 uid;
GPtrArray *sessions;
int i;
proxy = dbus_g_proxy_new_for_name (manager->priv->connection,
CK_NAME,
CK_MANAGER_PATH,
CK_MANAGER_INTERFACE);
if (proxy == NULL) {
g_warning ("Failed to connect to the ConsoleKit manager object");
goto out;
}
uid = gdm_user_get_uid (user);
g_debug ("Getting list of sessions for user %u", uid);
error = NULL;
res = dbus_g_proxy_call (proxy,
"GetSessionsForUnixUser",
&error,
G_TYPE_UINT, uid,
G_TYPE_INVALID,
dbus_g_type_get_collection ("GPtrArray", DBUS_TYPE_G_OBJECT_PATH),
&sessions,
G_TYPE_INVALID);
if (! res) {
g_debug ("Failed to find sessions for user: %s", error->message);
g_error_free (error);
goto out;
}
g_debug ("Found %d sessions for user %s", sessions->len, gdm_user_get_user_name (user));
for (i = 0; i < sessions->len; i++) {
char *ssid;
ssid = g_ptr_array_index (sessions, i);
maybe_add_session_for_user (manager, user, ssid);
}
g_ptr_array_foreach (sessions, (GFunc)g_free, NULL);
g_ptr_array_free (sessions, TRUE);
out:
if (proxy != NULL) {
g_object_unref (proxy);
}
}
static GdmUser *
create_user (GdmUserManager *manager)
{
GdmUser *user;
user = g_object_new (GDM_TYPE_USER, "manager", manager, NULL);
g_signal_connect (user,
"sessions-changed",
G_CALLBACK (on_user_sessions_changed),
manager);
g_signal_connect (user,
"icon-changed",
G_CALLBACK (on_user_icon_changed),
manager);
return user;
}
static void
add_user (GdmUserManager *manager,
GdmUser *user)
{
add_sessions_for_user (manager, user);
g_hash_table_insert (manager->priv->users,
g_strdup (gdm_user_get_user_name (user)),
g_object_ref (user));
g_signal_emit (manager, signals[USER_ADDED], 0, user);
}
static GdmUser *
add_new_user_for_pwent (GdmUserManager *manager,
struct passwd *pwent)
{
GdmUser *user;
g_debug ("Creating new user");
user = create_user (manager);
_gdm_user_update (user, pwent);
add_user (manager, user);
return user;
}
static char *
get_current_seat_id (DBusGConnection *connection)
{
DBusGProxy *proxy;
GError *error;
char *session_id;
char *seat_id;
gboolean res;
proxy = NULL;
session_id = NULL;
seat_id = NULL;
proxy = dbus_g_proxy_new_for_name (connection,
CK_NAME,
CK_MANAGER_PATH,
CK_MANAGER_INTERFACE);
if (proxy == NULL) {
g_warning ("Failed to connect to the ConsoleKit manager object");
goto out;
}
error = NULL;
res = dbus_g_proxy_call (proxy,
"GetCurrentSession",
&error,
G_TYPE_INVALID,
DBUS_TYPE_G_OBJECT_PATH,
&session_id,
G_TYPE_INVALID);
if (! res) {
g_debug ("Failed to identify the current session: %s", error->message);
g_error_free (error);
goto out;
}
seat_id = get_seat_id_for_session (connection, session_id);
out:
if (proxy != NULL) {
g_object_unref (proxy);
}
g_free (session_id);
return seat_id;
}
static gboolean
get_uid_from_session_id (GdmUserManager *manager,
const char *session_id,
uid_t *uidp)
{
DBusGProxy *proxy;
GError *error;
guint uid;
gboolean res;
proxy = dbus_g_proxy_new_for_name (manager->priv->connection,
CK_NAME,
session_id,
CK_SESSION_INTERFACE);
if (proxy == NULL) {
g_warning ("Failed to connect to the ConsoleKit session object");
return FALSE;
}
error = NULL;
res = dbus_g_proxy_call (proxy,
"GetUnixUser",
&error,
G_TYPE_INVALID,
G_TYPE_UINT, &uid,
G_TYPE_INVALID);
g_object_unref (proxy);
if (! res) {
g_warning ("Failed to query the session: %s", error->message);
g_error_free (error);
return FALSE;
}
if (uidp != NULL) {
*uidp = (uid_t) uid;
}
return TRUE;
}
static void
seat_session_added (DBusGProxy *seat_proxy,
const char *session_id,
GdmUserManager *manager)
{
uid_t uid;
gboolean res;
struct passwd *pwent;
GdmUser *user;
gboolean is_new;
g_debug ("Session added: %s", session_id);
res = get_uid_from_session_id (manager, session_id, &uid);
if (! res) {
g_warning ("Unable to lookup user for session");
return;
}
errno = 0;
pwent = getpwuid (uid);
if (pwent == NULL) {
g_warning ("Unable to lookup user id %d: %s", (int)uid, g_strerror (errno));
return;
}
/* check exclusions up front */
if (g_hash_table_lookup (manager->priv->exclusions, pwent->pw_name)) {
g_debug ("GdmUserManager: excluding user '%s'", pwent->pw_name);
return;
}
user = g_hash_table_lookup (manager->priv->users, pwent->pw_name);
if (user == NULL) {
g_debug ("Creating new user");
user = create_user (manager);
_gdm_user_update (user, pwent);
is_new = TRUE;
} else {
is_new = FALSE;
}
res = maybe_add_session_for_user (manager, user, session_id);
/* only add the user if we added a session */
if (is_new) {
if (res) {
add_user (manager, user);
} else {
g_object_unref (user);
}
}
}
static void
seat_session_removed (DBusGProxy *seat_proxy,
const char *session_id,
GdmUserManager *manager)
{
GdmUser *user;
char *username;
g_debug ("Session removed: %s", session_id);
/* since the session object may already be gone
* we can't query CK directly */
username = g_hash_table_lookup (manager->priv->sessions, session_id);
if (username == NULL) {
return;
}
user = g_hash_table_lookup (manager->priv->users, username);
if (user == NULL) {
/* nothing to do */
return;
}
g_debug ("GdmUserManager: Session removed for %s", username);
_gdm_user_remove_session (user, session_id);
}
static void
on_proxy_destroy (DBusGProxy *proxy,
GdmUserManager *manager)
{
g_debug ("GdmUserManager: seat proxy destroyed");
manager->priv->seat_proxy = NULL;
}
static void
get_seat_proxy (GdmUserManager *manager)
{
DBusGProxy *proxy;
GError *error;
g_assert (manager->priv->seat_proxy == NULL);
error = NULL;
manager->priv->connection = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
if (manager->priv->connection == NULL) {
g_warning ("Failed to connect to the D-Bus daemon: %s", error->message);
g_error_free (error);
return;
}
manager->priv->seat_id = get_current_seat_id (manager->priv->connection);
if (manager->priv->seat_id == NULL) {
return;
}
g_debug ("GdmUserManager: Found current seat: %s", manager->priv->seat_id);
error = NULL;
proxy = dbus_g_proxy_new_for_name_owner (manager->priv->connection,
CK_NAME,
manager->priv->seat_id,
CK_SEAT_INTERFACE,
&error);
if (proxy == NULL) {
g_warning ("Failed to connect to the ConsoleKit seat object: %s", error->message);
g_error_free (error);
return;
}
g_signal_connect (proxy, "destroy", G_CALLBACK (on_proxy_destroy), manager);
dbus_g_proxy_add_signal (proxy,
"SessionAdded",
DBUS_TYPE_G_OBJECT_PATH,
G_TYPE_INVALID);
dbus_g_proxy_add_signal (proxy,
"SessionRemoved",
DBUS_TYPE_G_OBJECT_PATH,
G_TYPE_INVALID);
dbus_g_proxy_connect_signal (proxy,
"SessionAdded",
G_CALLBACK (seat_session_added),
manager,
NULL);
dbus_g_proxy_connect_signal (proxy,
"SessionRemoved",
G_CALLBACK (seat_session_removed),
manager,
NULL);
manager->priv->seat_proxy = proxy;
}
/**
* gdm_manager_get_user:
* @manager: the manager to query.
* @username: the login name of the user to get.
*
* Retrieves a pointer to the #GdmUser object for the login named @username
* from @manager. This pointer is not a reference, and should not be released.
*
* Returns: a pointer to a #GdmUser object.
**/
GdmUser *
gdm_user_manager_get_user (GdmUserManager *manager,
const char *username)
{
GdmUser *user;
g_return_val_if_fail (GDM_IS_USER_MANAGER (manager), NULL);
g_return_val_if_fail (username != NULL && username[0] != '\0', NULL);
user = g_hash_table_lookup (manager->priv->users, username);
if (user == NULL) {
struct passwd *pwent;
pwent = getpwnam (username);
if (pwent != NULL) {
user = add_new_user_for_pwent (manager, pwent);
}
}
return user;
}
GdmUser *
gdm_user_manager_get_user_by_uid (GdmUserManager *manager,
gulong uid)
{
GdmUser *user;
struct passwd *pwent;
g_return_val_if_fail (GDM_IS_USER_MANAGER (manager), NULL);
pwent = getpwuid (uid);
if (pwent == NULL) {
g_warning ("GdmUserManager: unable to lookup uid %d", (int)uid);
return NULL;
}
user = g_hash_table_lookup (manager->priv->users, pwent->pw_name);
if (user == NULL) {
user = add_new_user_for_pwent (manager, pwent);
}
return user;
}
static void
listify_hash_values_hfunc (gpointer key,
gpointer value,
gpointer user_data)
{
GSList **list = user_data;
*list = g_slist_prepend (*list, value);
}
GSList *
gdm_user_manager_list_users (GdmUserManager *manager)
{
GSList *retval;
g_return_val_if_fail (GDM_IS_USER_MANAGER (manager), NULL);
retval = NULL;
g_hash_table_foreach (manager->priv->users, listify_hash_values_hfunc, &retval);
return g_slist_sort (retval, (GCompareFunc) gdm_user_collate);
}
static gboolean
parse_value_as_ulong (const char *value,
gulong *ulongval)
{
char *end_of_valid_long;
glong long_value;
gulong ulong_value;
errno = 0;
long_value = strtol (value, &end_of_valid_long, 10);
if (*value == '\0' || *end_of_valid_long != '\0') {
return FALSE;
}
ulong_value = long_value;
if (ulong_value != long_value || errno == ERANGE) {
return FALSE;
}
*ulongval = ulong_value;
return TRUE;
}
static gboolean
parse_ck_history_line (const char *line,
char **user_namep,
gulong *frequencyp)
{
GRegex *re;
GMatchInfo *match_info;
gboolean res;
gboolean ret;
GError *error;
ret = FALSE;
re = NULL;
match_info = NULL;
error = NULL;
re = g_regex_new ("(?P<username>[0-9a-zA-Z]+)[ ]+(?P<frequency>[0-9]+)", 0, 0, &error);
if (re == NULL) {
g_critical ("%s", error->message);
goto out;
}
g_regex_match (re, line, 0, &match_info);
res = g_match_info_matches (match_info);
if (! res) {
g_warning ("Unable to parse history: %s", line);
goto out;
}
if (user_namep != NULL) {
*user_namep = g_match_info_fetch_named (match_info, "username");
}
if (frequencyp != NULL) {
char *freq;
freq = g_match_info_fetch_named (match_info, "frequency");
res = parse_value_as_ulong (freq, frequencyp);
g_free (freq);
if (! res) {
goto out;
}
}
ret = TRUE;
out:
if (match_info != NULL) {
g_match_info_free (match_info);
}
if (re != NULL) {
g_regex_unref (re);
}
return ret;
}
static void
process_ck_history_line (GdmUserManager *manager,
const char *line)
{
gboolean res;
char *username;
gulong frequency;
GdmUser *user;
frequency = 0;
username = NULL;
res = parse_ck_history_line (line, &username, &frequency);
if (! res) {
return;
}
if (g_hash_table_lookup (manager->priv->exclusions, username)) {
g_debug ("GdmUserManager: excluding user '%s'", username);
g_free (username);
return;
}
user = gdm_user_manager_get_user (manager, username);
if (user == NULL) {
g_debug ("GdmUserManager: unable to lookup user '%s'", username);
g_free (username);
return;
}
g_object_set (user, "login-frequency", frequency, NULL);
g_signal_emit (manager, signals [USER_LOGIN_FREQUENCY_CHANGED], 0, user);
g_free (username);
}
static gboolean
ck_history_watch (GIOChannel *source,
GIOCondition condition,
GdmUserManager *manager)
{
GIOStatus status;
gboolean done = FALSE;
g_return_val_if_fail (manager != NULL, FALSE);
if (condition & G_IO_IN) {
char *str;
GError *error;
error = NULL;
status = g_io_channel_read_line (source, &str, NULL, NULL, &error);
if (error != NULL) {
g_warning ("GdmUserManager: unable to read line: %s", error->message);
g_error_free (error);
}
if (status == G_IO_STATUS_NORMAL) {
g_debug ("GdmUserManager: history output: %s", str);
process_ck_history_line (manager, str);
} else if (status == G_IO_STATUS_EOF) {
done = TRUE;
}
g_free (str);
} else if (condition & G_IO_HUP) {
done = TRUE;
}
if (done) {
g_signal_emit (G_OBJECT (manager), signals[USERS_LOADED], 0);
manager->priv->ck_history_id = 0;
return FALSE;
}
return TRUE;
}
static void
reload_ck_history (GdmUserManager *manager)
{
char *command;
const char *seat_id;
GError *error;
gboolean res;
char **argv;
int standard_out;
GIOChannel *channel;
seat_id = NULL;
if (manager->priv->seat_id != NULL
&& g_str_has_prefix (manager->priv->seat_id, "/org/freedesktop/ConsoleKit/")) {
seat_id = manager->priv->seat_id + strlen ("/org/freedesktop/ConsoleKit/");
}
if (seat_id == NULL) {
g_debug ("Unable to find users: no seat-id found");
return;
}
command = g_strdup_printf ("ck-history --frequent --seat='%s' --session-type=''",
seat_id);
g_debug ("GdmUserManager: running '%s'", command);
error = NULL;
if (! g_shell_parse_argv (command, NULL, &argv, &error)) {
g_warning ("Could not parse command: %s", error->message);
g_error_free (error);
goto out;
}
error = NULL;
res = g_spawn_async_with_pipes (NULL,
argv,
NULL,
G_SPAWN_SEARCH_PATH,
NULL,
NULL,
NULL, /* pid */
NULL,
&standard_out,
NULL,
&error);
g_strfreev (argv);
if (! res) {
g_warning ("Unable to run ck-history: %s", error->message);
g_error_free (error);
goto out;
}
channel = g_io_channel_unix_new (standard_out);
g_io_channel_set_close_on_unref (channel, TRUE);
g_io_channel_set_flags (channel,
g_io_channel_get_flags (channel) | G_IO_FLAG_NONBLOCK,
NULL);
manager->priv->ck_history_id = g_io_add_watch (channel,
G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
(GIOFunc)ck_history_watch,
manager);
g_io_channel_unref (channel);
out:
g_free (command);
}
static void
reload_passwd (GdmUserManager *manager)
{
struct passwd *pwent;
GSList *old_users;
GSList *new_users;
GSList *list;
FILE *fp;
old_users = NULL;
new_users = NULL;
errno = 0;
fp = fopen (PATH_PASSWD, "r");
if (fp == NULL) {
g_warning ("Unable to open %s: %s", PATH_PASSWD, g_strerror (errno));
goto out;
}
g_hash_table_foreach (manager->priv->users, listify_hash_values_hfunc, &old_users);
g_slist_foreach (old_users, (GFunc) g_object_ref, NULL);
/* Make sure we keep users who are logged in no matter what. */
for (list = old_users; list; list = list->next) {
if (gdm_user_get_num_sessions (list->data) > 0) {
g_object_freeze_notify (G_OBJECT (list->data));
new_users = g_slist_prepend (new_users, g_object_ref (list->data));
}
}
for (pwent = fgetpwent (fp); pwent != NULL; pwent = fgetpwent (fp)) {
GdmUser *user;
user = NULL;
/* Skip users below MinimalUID... */
if (pwent->pw_uid < DEFAULT_MINIMAL_UID) {
continue;
}
/* ...And users w/ invalid shells... */
if (pwent->pw_shell == NULL ||
!g_hash_table_lookup (manager->priv->shells, pwent->pw_shell)) {
g_debug ("GdmUserManager: skipping user with bad shell: %s", pwent->pw_name);
continue;
}
/* ...And explicitly excluded users */
if (g_hash_table_lookup (manager->priv->exclusions, pwent->pw_name)) {
g_debug ("GdmUserManager: explicitly skipping user: %s", pwent->pw_name);
continue;
}
user = g_hash_table_lookup (manager->priv->users, pwent->pw_name);
/* Update users already in the *new* list */
if (g_slist_find (new_users, user)) {
_gdm_user_update (user, pwent);
continue;
}
if (user == NULL) {
user = create_user (manager);
} else {
g_object_ref (user);
}
/* Freeze & update users not already in the new list */
g_object_freeze_notify (G_OBJECT (user));
_gdm_user_update (user, pwent);
new_users = g_slist_prepend (new_users, user);
}
/* Go through and handle added users */
for (list = new_users; list; list = list->next) {
if (! g_slist_find (old_users, list->data)) {
add_user (manager, list->data);
}
}
/* Go through and handle removed users */
for (list = old_users; list; list = list->next) {
if (! g_slist_find (new_users, list->data)) {
g_signal_emit (manager, signals[USER_REMOVED], 0, list->data);
g_hash_table_remove (manager->priv->users,
gdm_user_get_user_name (list->data));
}
}
out:
/* Cleanup */
fclose (fp);
g_slist_foreach (new_users, (GFunc) g_object_thaw_notify, NULL);
g_slist_foreach (new_users, (GFunc) g_object_unref, NULL);
g_slist_free (new_users);
g_slist_foreach (old_users, (GFunc) g_object_unref, NULL);
g_slist_free (old_users);
}
static void
reload_users (GdmUserManager *manager)
{
reload_ck_history (manager);
reload_passwd (manager);
}
static gboolean
reload_users_timeout (GdmUserManager *manager)
{
reload_users (manager);
manager->priv->reload_id = 0;
return FALSE;
}
static void
queue_reload_users (GdmUserManager *manager)
{
if (manager->priv->reload_id > 0) {
return;
}
g_signal_emit (G_OBJECT (manager), signals[LOADING_USERS], 0);
manager->priv->reload_id = g_idle_add ((GSourceFunc)reload_users_timeout, manager);
}
static void
reload_shells (GdmUserManager *manager)
{
char *shell;
setusershell ();
g_hash_table_remove_all (manager->priv->shells);
for (shell = getusershell (); shell != NULL; shell = getusershell ()) {
/* skip well known not-real shells */
if (shell == NULL
|| strcmp (shell, "/sbin/nologin") == 0
|| strcmp (shell, "/bin/false") == 0) {
g_debug ("GdmUserManager: skipping shell %s", shell);
continue;
}
g_hash_table_insert (manager->priv->shells,
g_strdup (shell),
GUINT_TO_POINTER (TRUE));
}
endusershell ();
}
static void
on_shells_monitor_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
GdmUserManager *manager)
{
if (event_type != G_FILE_MONITOR_EVENT_CHANGED &&
event_type != G_FILE_MONITOR_EVENT_CREATED) {
return;
}
reload_shells (manager);
reload_passwd (manager);
}
static void
on_passwd_monitor_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
GdmUserManager *manager)
{
if (event_type != G_FILE_MONITOR_EVENT_CHANGED &&
event_type != G_FILE_MONITOR_EVENT_CREATED) {
return;
}
reload_passwd (manager);
}
static void
ignore_log_handler (const char *log_domain,
GLogLevelFlags log_level,
const char *message,
gpointer user_data)
{
return;
}
static void
check_gdm_debug (void)
{
GDebugKey gdmkeys[] = { { "gdm", 1 } };
const char *gnome_shell_debug = g_getenv ("GNOME_SHELL_DEBUG");
if (!gnome_shell_debug ||
!g_parse_debug_string (gnome_shell_debug, gdmkeys, 1)) {
g_log_set_handler (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
ignore_log_handler, NULL);
}
}
static void
gdm_user_manager_class_init (GdmUserManagerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gdm_user_manager_finalize;
signals [LOADING_USERS] =
g_signal_new ("loading-users",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdmUserManagerClass, loading_users),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals [USERS_LOADED] =
g_signal_new ("users-loaded",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdmUserManagerClass, users_loaded),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals [USER_ADDED] =
g_signal_new ("user-added",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdmUserManagerClass, user_added),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GDM_TYPE_USER);
signals [USER_REMOVED] =
g_signal_new ("user-removed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdmUserManagerClass, user_removed),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GDM_TYPE_USER);
signals [USER_IS_LOGGED_IN_CHANGED] =
g_signal_new ("user-is-logged-in-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdmUserManagerClass, user_is_logged_in_changed),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GDM_TYPE_USER);
signals [USER_LOGIN_FREQUENCY_CHANGED] =
g_signal_new ("user-login-frequency-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdmUserManagerClass, user_login_frequency_changed),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GDM_TYPE_USER);
g_type_class_add_private (klass, sizeof (GdmUserManagerPrivate));
check_gdm_debug ();
}
static void
gdm_user_manager_init (GdmUserManager *manager)
{
int i;
GFile *file;
GError *error;
const char *exclude_default[] = DEFAULT_EXCLUDE;
manager->priv = GDM_USER_MANAGER_GET_PRIVATE (manager);
/* sessions */
manager->priv->sessions = g_hash_table_new_full (g_str_hash,
g_str_equal,
g_free,
g_free);
/* exclusions */
manager->priv->exclusions = g_hash_table_new_full (g_str_hash,
g_str_equal,
g_free,
NULL);
for (i = 0; exclude_default[i] != NULL; i++) {
g_hash_table_insert (manager->priv->exclusions,
g_strdup (exclude_default [i]),
GUINT_TO_POINTER (TRUE));
}
/* /etc/shells */
manager->priv->shells = g_hash_table_new_full (g_str_hash,
g_str_equal,
g_free,
NULL);
reload_shells (manager);
file = g_file_new_for_path (_PATH_SHELLS);
error = NULL;
manager->priv->shells_monitor = g_file_monitor_file (file,
G_FILE_MONITOR_NONE,
NULL,
&error);
if (manager->priv->shells_monitor != NULL) {
g_signal_connect (manager->priv->shells_monitor,
"changed",
G_CALLBACK (on_shells_monitor_changed),
manager);
} else {
g_warning ("Unable to monitor %s: %s", _PATH_SHELLS, error->message);
g_error_free (error);
}
g_object_unref (file);
/* /etc/passwd */
manager->priv->users = g_hash_table_new_full (g_str_hash,
g_str_equal,
g_free,
(GDestroyNotify) g_object_run_dispose);
file = g_file_new_for_path (PATH_PASSWD);
manager->priv->passwd_monitor = g_file_monitor_file (file,
G_FILE_MONITOR_NONE,
NULL,
&error);
if (manager->priv->passwd_monitor != NULL) {
g_signal_connect (manager->priv->passwd_monitor,
"changed",
G_CALLBACK (on_passwd_monitor_changed),
manager);
} else {
g_warning ("Unable to monitor %s: %s", PATH_PASSWD, error->message);
g_error_free (error);
}
g_object_unref (file);
get_seat_proxy (manager);
queue_reload_users (manager);
manager->priv->users_dirty = FALSE;
}
static void
gdm_user_manager_finalize (GObject *object)
{
GdmUserManager *manager;
g_return_if_fail (object != NULL);
g_return_if_fail (GDM_IS_USER_MANAGER (object));
manager = GDM_USER_MANAGER (object);
g_return_if_fail (manager->priv != NULL);
if (manager->priv->seat_proxy != NULL) {
g_object_unref (manager->priv->seat_proxy);
}
if (manager->priv->ck_history_id != 0) {
g_source_remove (manager->priv->ck_history_id);
manager->priv->ck_history_id = 0;
}
if (manager->priv->reload_id > 0) {
g_source_remove (manager->priv->reload_id);
manager->priv->reload_id = 0;
}
g_hash_table_destroy (manager->priv->sessions);
g_file_monitor_cancel (manager->priv->passwd_monitor);
g_hash_table_destroy (manager->priv->users);
g_file_monitor_cancel (manager->priv->shells_monitor);
g_hash_table_destroy (manager->priv->shells);
g_free (manager->priv->seat_id);
G_OBJECT_CLASS (gdm_user_manager_parent_class)->finalize (object);
}
GdmUserManager *
gdm_user_manager_ref_default (void)
{
if (user_manager_object != NULL) {
g_object_ref (user_manager_object);
} else {
user_manager_object = g_object_new (GDM_TYPE_USER_MANAGER, NULL);
g_object_add_weak_pointer (user_manager_object,
(gpointer *) &user_manager_object);
}
return GDM_USER_MANAGER (user_manager_object);
}
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