[134] | 1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- |
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| 2 | * |
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| 3 | * Copyright (C) 2006 Ray Strode <rstrode@redhat.com> |
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| 4 | * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu> |
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| 5 | * |
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| 6 | * This program is free software; you can redistribute it and/or modify |
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| 7 | * it under the terms of the GNU General Public License as published by |
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| 8 | * the Free Software Foundation; either version 2 of the License, or |
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| 9 | * (at your option) any later version. |
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| 10 | * |
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| 11 | * This program is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | * GNU General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU General Public License |
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| 17 | * along with this program; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 19 | * |
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| 20 | */ |
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| 21 | |
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| 22 | #include "config.h" |
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| 23 | |
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| 24 | #include <stdlib.h> |
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| 25 | #include <stdio.h> |
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| 26 | #include <fcntl.h> |
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| 27 | #include <unistd.h> |
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| 28 | #include <string.h> |
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| 29 | #include <sys/types.h> |
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| 30 | #include <sys/wait.h> |
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| 31 | #include <errno.h> |
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| 32 | #include <grp.h> |
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| 33 | #include <pwd.h> |
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| 34 | |
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| 35 | #ifdef HAVE_LOGINDEVPERM |
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| 36 | #include <libdevinfo.h> |
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| 37 | #endif /* HAVE_LOGINDEVPERM */ |
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| 38 | |
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| 39 | #include <security/pam_appl.h> |
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| 40 | |
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| 41 | #include <glib.h> |
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| 42 | #include <glib/gi18n.h> |
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| 43 | #include <glib/gstdio.h> |
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| 44 | #include <glib-object.h> |
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| 45 | #include <gio/gio.h> |
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| 46 | #define DBUS_API_SUBJECT_TO_CHANGE |
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| 47 | #include <dbus/dbus.h> |
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| 48 | #include <dbus/dbus-glib.h> |
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| 49 | #include <dbus/dbus-glib-lowlevel.h> |
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| 50 | |
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| 51 | #include <X11/Xauth.h> |
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| 52 | |
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| 53 | #include "ck-connector.h" |
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| 54 | |
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| 55 | #include "gdm-session-worker.h" |
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| 56 | #include "gdm-marshal.h" |
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| 57 | |
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| 58 | #if defined (HAVE_ADT) |
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| 59 | #include "gdm-session-solaris-auditor.h" |
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| 60 | #elif defined (HAVE_LIBAUDIT) |
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| 61 | #include "gdm-session-linux-auditor.h" |
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| 62 | #else |
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| 63 | #include "gdm-session-auditor.h" |
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| 64 | #endif |
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| 65 | |
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| 66 | #include "gdm-session-settings.h" |
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| 67 | |
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| 68 | #define GDM_SESSION_WORKER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_SESSION_WORKER, GdmSessionWorkerPrivate)) |
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| 69 | |
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| 70 | #define GDM_SESSION_DBUS_PATH "/org/gnome/DisplayManager/Session" |
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| 71 | #define GDM_SESSION_DBUS_INTERFACE "org.gnome.DisplayManager.Session" |
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| 72 | #define GDM_SESSION_DBUS_ERROR_CANCEL "org.gnome.DisplayManager.Session.Error.Cancel" |
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| 73 | |
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| 74 | #ifndef GDM_PASSWD_AUXILLARY_BUFFER_SIZE |
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| 75 | #define GDM_PASSWD_AUXILLARY_BUFFER_SIZE 1024 |
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| 76 | #endif |
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| 77 | |
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| 78 | #ifndef GDM_SESSION_DEFAULT_PATH |
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| 79 | #define GDM_SESSION_DEFAULT_PATH "/usr/local/bin:/usr/bin:/bin" |
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| 80 | #endif |
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| 81 | |
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| 82 | #ifndef GDM_SESSION_ROOT_UID |
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| 83 | #define GDM_SESSION_ROOT_UID 0 |
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| 84 | #endif |
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| 85 | |
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| 86 | #ifndef GDM_SESSION_LOG_FILENAME |
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| 87 | #define GDM_SESSION_LOG_FILENAME ".xsession-errors" |
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| 88 | #endif |
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| 89 | |
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| 90 | #define MESSAGE_REPLY_TIMEOUT (10 * 60 * 1000) |
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| 91 | |
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| 92 | #define MAX_FILE_SIZE 65536 |
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| 93 | |
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| 94 | enum { |
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| 95 | GDM_SESSION_WORKER_STATE_NONE = 0, |
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| 96 | GDM_SESSION_WORKER_STATE_SETUP_COMPLETE, |
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| 97 | GDM_SESSION_WORKER_STATE_AUTHENTICATED, |
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| 98 | GDM_SESSION_WORKER_STATE_AUTHORIZED, |
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| 99 | GDM_SESSION_WORKER_STATE_ACCREDITED, |
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| 100 | GDM_SESSION_WORKER_STATE_SESSION_OPENED, |
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| 101 | GDM_SESSION_WORKER_STATE_SESSION_STARTED, |
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| 102 | GDM_SESSION_WORKER_STATE_REAUTHENTICATED, |
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| 103 | GDM_SESSION_WORKER_STATE_REAUTHORIZED, |
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| 104 | GDM_SESSION_WORKER_STATE_REACCREDITED, |
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| 105 | }; |
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| 106 | |
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| 107 | struct GdmSessionWorkerPrivate |
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| 108 | { |
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| 109 | int state; |
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| 110 | |
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| 111 | int exit_code; |
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| 112 | |
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| 113 | CkConnector *ckc; |
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| 114 | pam_handle_t *pam_handle; |
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| 115 | |
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| 116 | GPid child_pid; |
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| 117 | guint child_watch_id; |
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| 118 | |
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| 119 | /* from Setup */ |
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| 120 | char *service; |
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| 121 | char *x11_display_name; |
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| 122 | char *x11_authority_file; |
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| 123 | char *display_device; |
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| 124 | char *hostname; |
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| 125 | char *username; |
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| 126 | uid_t uid; |
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| 127 | gid_t gid; |
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| 128 | gboolean password_is_required; |
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| 129 | |
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| 130 | int cred_flags; |
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| 131 | |
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| 132 | char **arguments; |
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| 133 | GHashTable *environment; |
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| 134 | guint32 cancelled : 1; |
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| 135 | guint32 timed_out : 1; |
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| 136 | guint state_change_idle_id; |
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| 137 | |
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| 138 | char *server_address; |
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| 139 | DBusConnection *connection; |
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| 140 | |
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| 141 | GdmSessionAuditor *auditor; |
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| 142 | GdmSessionSettings *user_settings; |
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| 143 | }; |
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| 144 | |
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| 145 | enum { |
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| 146 | PROP_0, |
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| 147 | PROP_SERVER_ADDRESS, |
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| 148 | }; |
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| 149 | |
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| 150 | static void gdm_session_worker_class_init (GdmSessionWorkerClass *klass); |
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| 151 | static void gdm_session_worker_init (GdmSessionWorker *session_worker); |
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| 152 | static void gdm_session_worker_finalize (GObject *object); |
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| 153 | |
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| 154 | static void queue_state_change (GdmSessionWorker *worker); |
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| 155 | |
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| 156 | typedef int (* GdmSessionWorkerPamNewMessagesFunc) (int, |
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| 157 | const struct pam_message **, |
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| 158 | struct pam_response **, |
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| 159 | gpointer); |
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| 160 | |
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| 161 | G_DEFINE_TYPE (GdmSessionWorker, gdm_session_worker, G_TYPE_OBJECT) |
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| 162 | |
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| 163 | GQuark |
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| 164 | gdm_session_worker_error_quark (void) |
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| 165 | { |
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| 166 | static GQuark error_quark = 0; |
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| 167 | |
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| 168 | if (error_quark == 0) |
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| 169 | error_quark = g_quark_from_static_string ("gdm-session-worker"); |
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| 170 | |
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| 171 | return error_quark; |
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| 172 | } |
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| 173 | |
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| 174 | static gboolean |
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| 175 | open_ck_session (GdmSessionWorker *worker) |
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| 176 | { |
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| 177 | struct passwd *pwent; |
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| 178 | gboolean ret; |
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| 179 | int res; |
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| 180 | DBusError error; |
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| 181 | const char *display_name; |
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| 182 | const char *display_device; |
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| 183 | const char *display_hostname; |
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| 184 | gboolean is_local; |
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| 185 | |
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| 186 | ret = FALSE; |
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| 187 | |
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| 188 | if (worker->priv->x11_display_name != NULL) { |
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| 189 | display_name = worker->priv->x11_display_name; |
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| 190 | } else { |
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| 191 | display_name = ""; |
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| 192 | } |
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| 193 | if (worker->priv->hostname != NULL) { |
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| 194 | display_hostname = worker->priv->hostname; |
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| 195 | } else { |
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| 196 | display_hostname = ""; |
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| 197 | } |
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| 198 | if (worker->priv->display_device != NULL) { |
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| 199 | display_device = worker->priv->display_device; |
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| 200 | } else { |
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| 201 | display_device = ""; |
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| 202 | } |
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| 203 | |
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| 204 | g_assert (worker->priv->username != NULL); |
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| 205 | |
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| 206 | /* FIXME: this isn't very good */ |
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| 207 | if (display_hostname == NULL |
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| 208 | || display_hostname[0] == '\0' |
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| 209 | || strcmp (display_hostname, "localhost") == 0) { |
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| 210 | is_local = TRUE; |
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| 211 | } else { |
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| 212 | is_local = FALSE; |
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| 213 | } |
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| 214 | |
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| 215 | pwent = getpwnam (worker->priv->username); |
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| 216 | if (pwent == NULL) { |
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| 217 | goto out; |
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| 218 | } |
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| 219 | |
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| 220 | worker->priv->ckc = ck_connector_new (); |
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| 221 | if (worker->priv->ckc == NULL) { |
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| 222 | g_warning ("Couldn't create new ConsoleKit connector"); |
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| 223 | goto out; |
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| 224 | } |
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| 225 | |
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| 226 | dbus_error_init (&error); |
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| 227 | res = ck_connector_open_session_with_parameters (worker->priv->ckc, |
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| 228 | &error, |
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| 229 | "unix-user", &pwent->pw_uid, |
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| 230 | "x11-display", &display_name, |
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| 231 | "x11-display-device", &display_device, |
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| 232 | "remote-host-name", &display_hostname, |
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| 233 | "is-local", &is_local, |
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| 234 | NULL); |
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| 235 | |
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| 236 | if (! res) { |
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| 237 | if (dbus_error_is_set (&error)) { |
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| 238 | g_warning ("%s\n", error.message); |
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| 239 | dbus_error_free (&error); |
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| 240 | } else { |
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| 241 | g_warning ("cannot open CK session: OOM, D-Bus system bus not available,\n" |
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| 242 | "ConsoleKit not available or insufficient privileges.\n"); |
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| 243 | } |
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| 244 | goto out; |
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| 245 | } |
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| 246 | |
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| 247 | ret = TRUE; |
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| 248 | |
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| 249 | out: |
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| 250 | return ret; |
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| 251 | } |
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| 252 | |
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| 253 | /* adapted from glib script_execute */ |
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| 254 | static void |
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| 255 | script_execute (const gchar *file, |
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| 256 | char **argv, |
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| 257 | char **envp, |
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| 258 | gboolean search_path) |
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| 259 | { |
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| 260 | /* Count the arguments. */ |
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| 261 | int argc = 0; |
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| 262 | |
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| 263 | while (argv[argc]) { |
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| 264 | ++argc; |
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| 265 | } |
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| 266 | |
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| 267 | /* Construct an argument list for the shell. */ |
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| 268 | { |
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| 269 | char **new_argv; |
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| 270 | |
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| 271 | new_argv = g_new0 (gchar*, argc + 2); /* /bin/sh and NULL */ |
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| 272 | |
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| 273 | new_argv[0] = (char *) "/bin/sh"; |
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| 274 | new_argv[1] = (char *) file; |
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| 275 | while (argc > 0) { |
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| 276 | new_argv[argc + 1] = argv[argc]; |
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| 277 | --argc; |
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| 278 | } |
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| 279 | |
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| 280 | /* Execute the shell. */ |
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| 281 | if (envp) { |
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| 282 | execve (new_argv[0], new_argv, envp); |
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| 283 | } else { |
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| 284 | execv (new_argv[0], new_argv); |
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| 285 | } |
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| 286 | |
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| 287 | g_free (new_argv); |
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| 288 | } |
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| 289 | } |
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| 290 | |
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| 291 | static char * |
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| 292 | my_strchrnul (const char *str, char c) |
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| 293 | { |
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| 294 | char *p = (char*) str; |
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| 295 | while (*p && (*p != c)) { |
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| 296 | ++p; |
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| 297 | } |
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| 298 | |
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| 299 | return p; |
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| 300 | } |
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| 301 | |
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| 302 | /* adapted from glib g_execute */ |
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| 303 | static gint |
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| 304 | gdm_session_execute (const char *file, |
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| 305 | char **argv, |
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| 306 | char **envp, |
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| 307 | gboolean search_path) |
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| 308 | { |
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| 309 | if (*file == '\0') { |
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| 310 | /* We check the simple case first. */ |
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| 311 | errno = ENOENT; |
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| 312 | return -1; |
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| 313 | } |
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| 314 | |
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| 315 | if (!search_path || strchr (file, '/') != NULL) { |
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| 316 | /* Don't search when it contains a slash. */ |
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| 317 | if (envp) { |
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| 318 | execve (file, argv, envp); |
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| 319 | } else { |
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| 320 | execv (file, argv); |
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| 321 | } |
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| 322 | |
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| 323 | if (errno == ENOEXEC) { |
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| 324 | script_execute (file, argv, envp, FALSE); |
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| 325 | } |
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| 326 | } else { |
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| 327 | gboolean got_eacces = 0; |
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| 328 | const char *path, *p; |
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| 329 | char *name, *freeme; |
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| 330 | gsize len; |
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| 331 | gsize pathlen; |
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| 332 | |
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| 333 | path = g_getenv ("PATH"); |
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| 334 | if (path == NULL) { |
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| 335 | /* There is no `PATH' in the environment. The default |
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| 336 | * search path in libc is the current directory followed by |
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| 337 | * the path `confstr' returns for `_CS_PATH'. |
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| 338 | */ |
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| 339 | |
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| 340 | /* In GLib we put . last, for security, and don't use the |
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| 341 | * unportable confstr(); UNIX98 does not actually specify |
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| 342 | * what to search if PATH is unset. POSIX may, dunno. |
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| 343 | */ |
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| 344 | |
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| 345 | path = "/bin:/usr/bin:."; |
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| 346 | } |
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| 347 | |
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| 348 | len = strlen (file) + 1; |
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| 349 | pathlen = strlen (path); |
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| 350 | freeme = name = g_malloc (pathlen + len + 1); |
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| 351 | |
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| 352 | /* Copy the file name at the top, including '\0' */ |
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| 353 | memcpy (name + pathlen + 1, file, len); |
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| 354 | name = name + pathlen; |
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| 355 | /* And add the slash before the filename */ |
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| 356 | *name = '/'; |
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| 357 | |
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| 358 | p = path; |
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| 359 | do { |
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| 360 | char *startp; |
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| 361 | |
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| 362 | path = p; |
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| 363 | p = my_strchrnul (path, ':'); |
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| 364 | |
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| 365 | if (p == path) { |
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| 366 | /* Two adjacent colons, or a colon at the beginning or the end |
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| 367 | * of `PATH' means to search the current directory. |
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| 368 | */ |
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| 369 | startp = name + 1; |
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| 370 | } else { |
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| 371 | startp = memcpy (name - (p - path), path, p - path); |
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| 372 | } |
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| 373 | |
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| 374 | /* Try to execute this name. If it works, execv will not return. */ |
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| 375 | if (envp) { |
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| 376 | execve (startp, argv, envp); |
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| 377 | } else { |
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| 378 | execv (startp, argv); |
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| 379 | } |
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| 380 | |
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| 381 | if (errno == ENOEXEC) { |
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| 382 | script_execute (startp, argv, envp, search_path); |
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| 383 | } |
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| 384 | |
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| 385 | switch (errno) { |
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| 386 | case EACCES: |
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| 387 | /* Record the we got a `Permission denied' error. If we end |
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| 388 | * up finding no executable we can use, we want to diagnose |
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| 389 | * that we did find one but were denied access. |
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| 390 | */ |
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| 391 | got_eacces = TRUE; |
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| 392 | |
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| 393 | /* FALL THRU */ |
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| 394 | |
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| 395 | case ENOENT: |
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| 396 | #ifdef ESTALE |
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| 397 | case ESTALE: |
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| 398 | #endif |
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| 399 | #ifdef ENOTDIR |
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| 400 | case ENOTDIR: |
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| 401 | #endif |
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| 402 | /* Those errors indicate the file is missing or not executable |
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| 403 | * by us, in which case we want to just try the next path |
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| 404 | * directory. |
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| 405 | */ |
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| 406 | break; |
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| 407 | |
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| 408 | default: |
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| 409 | /* Some other error means we found an executable file, but |
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| 410 | * something went wrong executing it; return the error to our |
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| 411 | * caller. |
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| 412 | */ |
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| 413 | g_free (freeme); |
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| 414 | return -1; |
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| 415 | } |
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| 416 | } while (*p++ != '\0'); |
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| 417 | |
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| 418 | /* We tried every element and none of them worked. */ |
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| 419 | if (got_eacces) { |
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| 420 | /* At least one failure was due to permissions, so report that |
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| 421 | * error. |
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| 422 | */ |
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| 423 | errno = EACCES; |
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| 424 | } |
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| 425 | |
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| 426 | g_free (freeme); |
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| 427 | } |
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| 428 | |
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| 429 | /* Return the error from the last attempt (probably ENOENT). */ |
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| 430 | return -1; |
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| 431 | } |
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| 432 | |
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| 433 | static gboolean |
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| 434 | send_dbus_string_method (DBusConnection *connection, |
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| 435 | const char *method, |
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| 436 | const char *payload) |
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| 437 | { |
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| 438 | DBusError error; |
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| 439 | DBusMessage *message; |
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| 440 | DBusMessage *reply; |
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| 441 | DBusMessageIter iter; |
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| 442 | const char *str; |
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| 443 | |
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| 444 | if (payload != NULL) { |
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| 445 | str = payload; |
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| 446 | } else { |
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| 447 | str = ""; |
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| 448 | } |
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| 449 | |
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| 450 | g_debug ("GdmSessionWorker: Calling %s", method); |
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| 451 | message = dbus_message_new_method_call (NULL, |
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| 452 | GDM_SESSION_DBUS_PATH, |
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| 453 | GDM_SESSION_DBUS_INTERFACE, |
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| 454 | method); |
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| 455 | if (message == NULL) { |
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| 456 | g_warning ("Couldn't allocate the D-Bus message"); |
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| 457 | return FALSE; |
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| 458 | } |
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| 459 | |
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| 460 | dbus_message_iter_init_append (message, &iter); |
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| 461 | dbus_message_iter_append_basic (&iter, |
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| 462 | DBUS_TYPE_STRING, |
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| 463 | &str); |
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| 464 | |
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| 465 | dbus_error_init (&error); |
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| 466 | reply = dbus_connection_send_with_reply_and_block (connection, |
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| 467 | message, |
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| 468 | -1, |
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| 469 | &error); |
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| 470 | |
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| 471 | dbus_message_unref (message); |
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| 472 | |
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| 473 | if (dbus_error_is_set (&error)) { |
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| 474 | g_debug ("%s %s raised: %s\n", |
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| 475 | method, |
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| 476 | error.name, |
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| 477 | error.message); |
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| 478 | return FALSE; |
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| 479 | } |
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| 480 | if (reply != NULL) { |
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| 481 | dbus_message_unref (reply); |
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| 482 | } |
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| 483 | dbus_connection_flush (connection); |
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| 484 | |
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| 485 | return TRUE; |
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| 486 | } |
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| 487 | |
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| 488 | static gboolean |
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| 489 | send_dbus_int_method (DBusConnection *connection, |
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| 490 | const char *method, |
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| 491 | int payload) |
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| 492 | { |
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| 493 | DBusError error; |
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| 494 | DBusMessage *message; |
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| 495 | DBusMessage *reply; |
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| 496 | DBusMessageIter iter; |
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| 497 | |
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| 498 | g_debug ("GdmSessionWorker: Calling %s", method); |
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| 499 | message = dbus_message_new_method_call (NULL, |
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| 500 | GDM_SESSION_DBUS_PATH, |
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| 501 | GDM_SESSION_DBUS_INTERFACE, |
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| 502 | method); |
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| 503 | if (message == NULL) { |
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| 504 | g_warning ("Couldn't allocate the D-Bus message"); |
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| 505 | return FALSE; |
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| 506 | } |
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| 507 | |
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| 508 | dbus_message_iter_init_append (message, &iter); |
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| 509 | dbus_message_iter_append_basic (&iter, |
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| 510 | DBUS_TYPE_INT32, |
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| 511 | &payload); |
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| 512 | |
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| 513 | dbus_error_init (&error); |
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| 514 | reply = dbus_connection_send_with_reply_and_block (connection, |
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| 515 | message, |
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| 516 | -1, |
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| 517 | &error); |
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| 518 | dbus_message_unref (message); |
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| 519 | if (reply != NULL) { |
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| 520 | dbus_message_unref (reply); |
---|
| 521 | } |
---|
| 522 | dbus_connection_flush (connection); |
---|
| 523 | |
---|
| 524 | if (dbus_error_is_set (&error)) { |
---|
| 525 | g_debug ("%s %s raised: %s\n", |
---|
| 526 | method, |
---|
| 527 | error.name, |
---|
| 528 | error.message); |
---|
| 529 | return FALSE; |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | return TRUE; |
---|
| 533 | } |
---|
| 534 | |
---|
| 535 | static gboolean |
---|
| 536 | send_dbus_void_method (DBusConnection *connection, |
---|
| 537 | const char *method) |
---|
| 538 | { |
---|
| 539 | DBusError error; |
---|
| 540 | DBusMessage *message; |
---|
| 541 | DBusMessage *reply; |
---|
| 542 | |
---|
| 543 | g_debug ("GdmSessionWorker: Calling %s", method); |
---|
| 544 | message = dbus_message_new_method_call (NULL, |
---|
| 545 | GDM_SESSION_DBUS_PATH, |
---|
| 546 | GDM_SESSION_DBUS_INTERFACE, |
---|
| 547 | method); |
---|
| 548 | if (message == NULL) { |
---|
| 549 | g_warning ("Couldn't allocate the D-Bus message"); |
---|
| 550 | return FALSE; |
---|
| 551 | } |
---|
| 552 | |
---|
| 553 | dbus_error_init (&error); |
---|
| 554 | reply = dbus_connection_send_with_reply_and_block (connection, |
---|
| 555 | message, |
---|
| 556 | -1, |
---|
| 557 | &error); |
---|
| 558 | dbus_message_unref (message); |
---|
| 559 | if (reply != NULL) { |
---|
| 560 | dbus_message_unref (reply); |
---|
| 561 | } |
---|
| 562 | dbus_connection_flush (connection); |
---|
| 563 | |
---|
| 564 | if (dbus_error_is_set (&error)) { |
---|
| 565 | g_debug ("%s %s raised: %s\n", |
---|
| 566 | method, |
---|
| 567 | error.name, |
---|
| 568 | error.message); |
---|
| 569 | return FALSE; |
---|
| 570 | } |
---|
| 571 | |
---|
| 572 | return TRUE; |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | static gboolean |
---|
| 576 | gdm_session_worker_get_username (GdmSessionWorker *worker, |
---|
| 577 | char **username) |
---|
| 578 | { |
---|
| 579 | gconstpointer item; |
---|
| 580 | |
---|
| 581 | g_assert (worker->priv->pam_handle != NULL); |
---|
| 582 | |
---|
| 583 | if (pam_get_item (worker->priv->pam_handle, PAM_USER, &item) == PAM_SUCCESS) { |
---|
| 584 | if (username != NULL) { |
---|
| 585 | *username = g_strdup ((char *) item); |
---|
| 586 | g_debug ("GdmSessionWorker: username is '%s'", |
---|
| 587 | *username != NULL ? *username : "<unset>"); |
---|
| 588 | } |
---|
| 589 | return TRUE; |
---|
| 590 | } |
---|
| 591 | |
---|
| 592 | return FALSE; |
---|
| 593 | } |
---|
| 594 | |
---|
| 595 | static void |
---|
| 596 | attempt_to_load_user_settings (GdmSessionWorker *worker, |
---|
| 597 | const char *username) |
---|
| 598 | { |
---|
| 599 | gdm_session_settings_load (worker->priv->user_settings, |
---|
| 600 | username, |
---|
| 601 | NULL); |
---|
| 602 | } |
---|
| 603 | |
---|
| 604 | static void |
---|
| 605 | gdm_session_worker_update_username (GdmSessionWorker *worker) |
---|
| 606 | { |
---|
| 607 | char *username; |
---|
| 608 | gboolean res; |
---|
| 609 | |
---|
| 610 | username = NULL; |
---|
| 611 | res = gdm_session_worker_get_username (worker, &username); |
---|
| 612 | if (res) { |
---|
| 613 | g_debug ("GdmSessionWorker: old-username='%s' new-username='%s'", |
---|
| 614 | worker->priv->username != NULL ? worker->priv->username : "<unset>", |
---|
| 615 | username != NULL ? username : "<unset>"); |
---|
| 616 | |
---|
| 617 | |
---|
| 618 | gdm_session_auditor_set_username (worker->priv->auditor, worker->priv->username); |
---|
| 619 | |
---|
| 620 | if ((worker->priv->username == username) || |
---|
| 621 | ((worker->priv->username != NULL) && (username != NULL) && |
---|
| 622 | (strcmp (worker->priv->username, username) == 0))) |
---|
| 623 | goto out; |
---|
| 624 | |
---|
| 625 | g_debug ("GdmSessionWorker: setting username to '%s'", username); |
---|
| 626 | |
---|
| 627 | g_free (worker->priv->username); |
---|
| 628 | worker->priv->username = username; |
---|
| 629 | username = NULL; |
---|
| 630 | |
---|
| 631 | send_dbus_string_method (worker->priv->connection, |
---|
| 632 | "UsernameChanged", |
---|
| 633 | worker->priv->username); |
---|
| 634 | |
---|
| 635 | /* We have a new username to try. If we haven't been able to |
---|
| 636 | * read user settings up until now, then give it a go now |
---|
| 637 | * (see the comment in do_setup for rationale on why it's useful |
---|
| 638 | * to keep trying to read settings) |
---|
| 639 | */ |
---|
| 640 | if (worker->priv->username != NULL && |
---|
| 641 | !gdm_session_settings_is_loaded (worker->priv->user_settings)) { |
---|
| 642 | attempt_to_load_user_settings (worker, worker->priv->username); |
---|
| 643 | } |
---|
| 644 | } |
---|
| 645 | |
---|
| 646 | out: |
---|
| 647 | g_free (username); |
---|
| 648 | } |
---|
| 649 | |
---|
| 650 | static gboolean |
---|
| 651 | send_question_method (GdmSessionWorker *worker, |
---|
| 652 | const char *method, |
---|
| 653 | const char *question, |
---|
| 654 | char **answerp) |
---|
| 655 | { |
---|
| 656 | DBusError error; |
---|
| 657 | DBusMessage *message; |
---|
| 658 | DBusMessage *reply; |
---|
| 659 | DBusMessageIter iter; |
---|
| 660 | gboolean ret; |
---|
| 661 | const char *answer; |
---|
| 662 | |
---|
| 663 | ret = FALSE; |
---|
| 664 | |
---|
| 665 | g_debug ("GdmSessionWorker: Calling %s", method); |
---|
| 666 | message = dbus_message_new_method_call (NULL, |
---|
| 667 | GDM_SESSION_DBUS_PATH, |
---|
| 668 | GDM_SESSION_DBUS_INTERFACE, |
---|
| 669 | method); |
---|
| 670 | if (message == NULL) { |
---|
| 671 | g_warning ("Couldn't allocate the D-Bus message"); |
---|
| 672 | return FALSE; |
---|
| 673 | } |
---|
| 674 | |
---|
| 675 | dbus_message_iter_init_append (message, &iter); |
---|
| 676 | dbus_message_iter_append_basic (&iter, |
---|
| 677 | DBUS_TYPE_STRING, |
---|
| 678 | &question); |
---|
| 679 | |
---|
| 680 | dbus_error_init (&error); |
---|
| 681 | reply = dbus_connection_send_with_reply_and_block (worker->priv->connection, |
---|
| 682 | message, |
---|
| 683 | MESSAGE_REPLY_TIMEOUT, |
---|
| 684 | &error); |
---|
| 685 | dbus_message_unref (message); |
---|
| 686 | |
---|
| 687 | if (dbus_error_is_set (&error)) { |
---|
| 688 | if (dbus_error_has_name (&error, GDM_SESSION_DBUS_ERROR_CANCEL)) { |
---|
| 689 | worker->priv->cancelled = TRUE; |
---|
| 690 | } else if (dbus_error_has_name (&error, DBUS_ERROR_NO_REPLY)) { |
---|
| 691 | worker->priv->timed_out = TRUE; |
---|
| 692 | } |
---|
| 693 | g_debug ("%s %s raised: %s\n", |
---|
| 694 | method, |
---|
| 695 | error.name, |
---|
| 696 | error.message); |
---|
| 697 | goto out; |
---|
| 698 | } |
---|
| 699 | |
---|
| 700 | dbus_message_iter_init (reply, &iter); |
---|
| 701 | dbus_message_iter_get_basic (&iter, &answer); |
---|
| 702 | if (answerp != NULL) { |
---|
| 703 | *answerp = g_strdup (answer); |
---|
| 704 | } |
---|
| 705 | ret = TRUE; |
---|
| 706 | |
---|
| 707 | dbus_message_unref (reply); |
---|
| 708 | dbus_connection_flush (worker->priv->connection); |
---|
| 709 | |
---|
| 710 | out: |
---|
| 711 | |
---|
| 712 | return ret; |
---|
| 713 | } |
---|
| 714 | |
---|
| 715 | static gboolean |
---|
| 716 | gdm_session_worker_ask_question (GdmSessionWorker *worker, |
---|
| 717 | const char *question, |
---|
| 718 | char **answerp) |
---|
| 719 | { |
---|
| 720 | return send_question_method (worker, "InfoQuery", question, answerp); |
---|
| 721 | } |
---|
| 722 | |
---|
| 723 | static gboolean |
---|
| 724 | gdm_session_worker_ask_for_secret (GdmSessionWorker *worker, |
---|
| 725 | const char *question, |
---|
| 726 | char **answerp) |
---|
| 727 | { |
---|
| 728 | return send_question_method (worker, "SecretInfoQuery", question, answerp); |
---|
| 729 | } |
---|
| 730 | |
---|
| 731 | static gboolean |
---|
| 732 | gdm_session_worker_report_info (GdmSessionWorker *worker, |
---|
| 733 | const char *info) |
---|
| 734 | { |
---|
| 735 | return send_dbus_string_method (worker->priv->connection, |
---|
| 736 | "Info", |
---|
| 737 | info); |
---|
| 738 | } |
---|
| 739 | |
---|
| 740 | static gboolean |
---|
| 741 | gdm_session_worker_report_problem (GdmSessionWorker *worker, |
---|
| 742 | const char *problem) |
---|
| 743 | { |
---|
| 744 | return send_dbus_string_method (worker->priv->connection, |
---|
| 745 | "Problem", |
---|
| 746 | problem); |
---|
| 747 | } |
---|
| 748 | |
---|
| 749 | static char * |
---|
| 750 | convert_to_utf8 (const char *str) |
---|
| 751 | { |
---|
| 752 | char *utf8; |
---|
| 753 | utf8 = g_locale_to_utf8 (str, |
---|
| 754 | -1, |
---|
| 755 | NULL, |
---|
| 756 | NULL, |
---|
| 757 | NULL); |
---|
| 758 | |
---|
| 759 | /* if we couldn't convert text from locale then |
---|
| 760 | * assume utf-8 and hope for the best */ |
---|
| 761 | if (utf8 == NULL) { |
---|
| 762 | char *p; |
---|
| 763 | char *q; |
---|
| 764 | |
---|
| 765 | utf8 = g_strdup (str); |
---|
| 766 | |
---|
| 767 | p = utf8; |
---|
| 768 | while (*p != '\0' && !g_utf8_validate ((const char *)p, -1, (const char **)&q)) { |
---|
| 769 | *q = '?'; |
---|
| 770 | p = q + 1; |
---|
| 771 | } |
---|
| 772 | } |
---|
| 773 | |
---|
| 774 | return utf8; |
---|
| 775 | } |
---|
| 776 | |
---|
| 777 | static gboolean |
---|
| 778 | gdm_session_worker_process_pam_message (GdmSessionWorker *worker, |
---|
| 779 | const struct pam_message *query, |
---|
| 780 | char **response_text) |
---|
| 781 | { |
---|
| 782 | char *user_answer; |
---|
| 783 | gboolean res; |
---|
| 784 | char *utf8_msg; |
---|
| 785 | |
---|
| 786 | if (response_text != NULL) { |
---|
| 787 | *response_text = NULL; |
---|
| 788 | } |
---|
| 789 | |
---|
| 790 | gdm_session_worker_update_username (worker); |
---|
| 791 | |
---|
| 792 | g_debug ("GdmSessionWorker: received pam message of type %u with payload '%s'", |
---|
| 793 | query->msg_style, query->msg); |
---|
| 794 | |
---|
| 795 | utf8_msg = convert_to_utf8 (query->msg); |
---|
| 796 | |
---|
| 797 | worker->priv->cancelled = FALSE; |
---|
| 798 | worker->priv->timed_out = FALSE; |
---|
| 799 | |
---|
| 800 | user_answer = NULL; |
---|
| 801 | res = FALSE; |
---|
| 802 | switch (query->msg_style) { |
---|
| 803 | case PAM_PROMPT_ECHO_ON: |
---|
| 804 | res = gdm_session_worker_ask_question (worker, utf8_msg, &user_answer); |
---|
| 805 | break; |
---|
| 806 | case PAM_PROMPT_ECHO_OFF: |
---|
| 807 | res = gdm_session_worker_ask_for_secret (worker, utf8_msg, &user_answer); |
---|
| 808 | break; |
---|
| 809 | case PAM_TEXT_INFO: |
---|
| 810 | res = gdm_session_worker_report_info (worker, utf8_msg); |
---|
| 811 | break; |
---|
| 812 | case PAM_ERROR_MSG: |
---|
| 813 | res = gdm_session_worker_report_problem (worker, utf8_msg); |
---|
| 814 | break; |
---|
| 815 | default: |
---|
| 816 | g_assert_not_reached (); |
---|
| 817 | break; |
---|
| 818 | } |
---|
| 819 | |
---|
| 820 | if (worker->priv->timed_out) { |
---|
| 821 | send_dbus_void_method (worker->priv->connection, "CancelPendingQuery"); |
---|
| 822 | worker->priv->timed_out = FALSE; |
---|
| 823 | } |
---|
| 824 | |
---|
| 825 | if (user_answer != NULL) { |
---|
| 826 | /* we strdup and g_free to make sure we return malloc'd |
---|
| 827 | * instead of g_malloc'd memory |
---|
| 828 | */ |
---|
| 829 | if (res && response_text != NULL) { |
---|
| 830 | *response_text = strdup (user_answer); |
---|
| 831 | } |
---|
| 832 | |
---|
| 833 | memset (user_answer, '\0', strlen (user_answer)); |
---|
| 834 | g_free (user_answer); |
---|
| 835 | |
---|
| 836 | g_debug ("GdmSessionWorker: trying to get updated username"); |
---|
| 837 | |
---|
| 838 | res = TRUE; |
---|
| 839 | } |
---|
| 840 | |
---|
| 841 | g_free (utf8_msg); |
---|
| 842 | |
---|
| 843 | return res; |
---|
| 844 | } |
---|
| 845 | |
---|
| 846 | static int |
---|
| 847 | gdm_session_worker_pam_new_messages_handler (int number_of_messages, |
---|
| 848 | const struct pam_message **messages, |
---|
| 849 | struct pam_response **responses, |
---|
| 850 | GdmSessionWorker *worker) |
---|
| 851 | { |
---|
| 852 | struct pam_response *replies; |
---|
| 853 | int return_value; |
---|
| 854 | int i; |
---|
| 855 | |
---|
| 856 | g_debug ("GdmSessionWorker: %d new messages received from PAM\n", number_of_messages); |
---|
| 857 | |
---|
| 858 | return_value = PAM_CONV_ERR; |
---|
| 859 | |
---|
| 860 | if (number_of_messages < 0) { |
---|
| 861 | return PAM_CONV_ERR; |
---|
| 862 | } |
---|
| 863 | |
---|
| 864 | if (number_of_messages == 0) { |
---|
| 865 | if (responses) { |
---|
| 866 | *responses = NULL; |
---|
| 867 | } |
---|
| 868 | |
---|
| 869 | return PAM_SUCCESS; |
---|
| 870 | } |
---|
| 871 | |
---|
| 872 | /* we want to generate one reply for every question |
---|
| 873 | */ |
---|
| 874 | replies = (struct pam_response *) calloc (number_of_messages, |
---|
| 875 | sizeof (struct pam_response)); |
---|
| 876 | for (i = 0; i < number_of_messages; i++) { |
---|
| 877 | gboolean got_response; |
---|
| 878 | char *response_text; |
---|
| 879 | |
---|
| 880 | response_text = NULL; |
---|
| 881 | got_response = gdm_session_worker_process_pam_message (worker, |
---|
| 882 | messages[i], |
---|
| 883 | &response_text); |
---|
| 884 | if (!got_response) { |
---|
| 885 | if (response_text != NULL) { |
---|
| 886 | memset (response_text, '\0', strlen (response_text)); |
---|
| 887 | g_free (response_text); |
---|
| 888 | } |
---|
| 889 | goto out; |
---|
| 890 | } |
---|
| 891 | |
---|
| 892 | replies[i].resp = response_text; |
---|
| 893 | replies[i].resp_retcode = PAM_SUCCESS; |
---|
| 894 | } |
---|
| 895 | |
---|
| 896 | return_value = PAM_SUCCESS; |
---|
| 897 | |
---|
| 898 | out: |
---|
| 899 | if (return_value != PAM_SUCCESS) { |
---|
| 900 | for (i = 0; i < number_of_messages; i++) { |
---|
| 901 | if (replies[i].resp != NULL) { |
---|
| 902 | memset (replies[i].resp, 0, strlen (replies[i].resp)); |
---|
| 903 | free (replies[i].resp); |
---|
| 904 | } |
---|
| 905 | memset (&replies[i], 0, sizeof (replies[i])); |
---|
| 906 | } |
---|
| 907 | free (replies); |
---|
| 908 | replies = NULL; |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | if (responses) { |
---|
| 912 | *responses = replies; |
---|
| 913 | } |
---|
| 914 | |
---|
| 915 | g_debug ("GdmSessionWorker: PAM conversation returning %d: %s", |
---|
| 916 | return_value, |
---|
| 917 | pam_strerror (worker->priv->pam_handle, return_value)); |
---|
| 918 | |
---|
| 919 | return return_value; |
---|
| 920 | } |
---|
| 921 | |
---|
| 922 | static void |
---|
| 923 | gdm_session_worker_start_auditor (GdmSessionWorker *worker) |
---|
| 924 | { |
---|
| 925 | |
---|
| 926 | /* FIXME: it may make sense at some point to keep a list of |
---|
| 927 | * auditors, instead of assuming they are mutually exclusive |
---|
| 928 | */ |
---|
| 929 | #if defined (HAVE_ADT) |
---|
| 930 | worker->priv->auditor = gdm_session_solaris_auditor_new (worker->priv->hostname, |
---|
| 931 | worker->priv->display_device); |
---|
| 932 | #elif defined (HAVE_LIBAUDIT) |
---|
| 933 | worker->priv->auditor = gdm_session_linux_auditor_new (worker->priv->hostname, |
---|
| 934 | worker->priv->display_device); |
---|
| 935 | #else |
---|
| 936 | worker->priv->auditor = gdm_session_auditor_new (worker->priv->hostname, |
---|
| 937 | worker->priv->display_device); |
---|
| 938 | #endif |
---|
| 939 | } |
---|
| 940 | |
---|
| 941 | static void |
---|
| 942 | gdm_session_worker_stop_auditor (GdmSessionWorker *worker) |
---|
| 943 | { |
---|
| 944 | g_object_unref (worker->priv->auditor); |
---|
| 945 | worker->priv->auditor = NULL; |
---|
| 946 | } |
---|
| 947 | |
---|
| 948 | static gboolean |
---|
| 949 | check_user_copy_file (const char *srcfile, |
---|
| 950 | const char *destfile, |
---|
| 951 | uid_t user, |
---|
| 952 | gssize max_file_size) |
---|
| 953 | { |
---|
| 954 | struct stat srcfileinfo; |
---|
| 955 | struct stat destfileinfo; |
---|
| 956 | |
---|
| 957 | if (max_file_size < 0) { |
---|
| 958 | max_file_size = G_MAXSIZE; |
---|
| 959 | } |
---|
| 960 | |
---|
| 961 | /* Exists/Readable? */ |
---|
| 962 | if (g_stat (srcfile, &srcfileinfo) < 0) { |
---|
| 963 | g_debug ("File does not exist"); |
---|
| 964 | return FALSE; |
---|
| 965 | } |
---|
| 966 | |
---|
| 967 | /* Is newer than the file already in the cache? */ |
---|
| 968 | if (destfile != NULL && g_stat (destfile, &destfileinfo) == 0) { |
---|
| 969 | if (srcfileinfo.st_mtime <= destfileinfo.st_mtime) { |
---|
| 970 | g_debug ("Destination file is newer"); |
---|
| 971 | return FALSE; |
---|
| 972 | } |
---|
| 973 | } |
---|
| 974 | |
---|
| 975 | /* Is a regular file */ |
---|
| 976 | if (G_UNLIKELY (!S_ISREG (srcfileinfo.st_mode))) { |
---|
| 977 | g_debug ("File is not a regular file"); |
---|
| 978 | return FALSE; |
---|
| 979 | } |
---|
| 980 | |
---|
| 981 | /* Owned by user? */ |
---|
| 982 | if (G_UNLIKELY (srcfileinfo.st_uid != user)) { |
---|
| 983 | g_debug ("File is not owned by user"); |
---|
| 984 | return FALSE; |
---|
| 985 | } |
---|
| 986 | |
---|
| 987 | /* Size is kosher? */ |
---|
| 988 | if (G_UNLIKELY (srcfileinfo.st_size > max_file_size)) { |
---|
| 989 | g_debug ("File is too large"); |
---|
| 990 | return FALSE; |
---|
| 991 | } |
---|
| 992 | |
---|
| 993 | return TRUE; |
---|
| 994 | } |
---|
| 995 | |
---|
| 996 | static gboolean |
---|
| 997 | gdm_cache_copy_file (GdmSessionWorker *worker, |
---|
| 998 | const char *userfilename, |
---|
| 999 | const char *cachefilename) |
---|
| 1000 | { |
---|
| 1001 | gboolean res; |
---|
| 1002 | |
---|
| 1003 | g_debug ("Checking if %s should be copied to cache %s", |
---|
| 1004 | userfilename, cachefilename); |
---|
| 1005 | |
---|
| 1006 | res = check_user_copy_file (userfilename, |
---|
| 1007 | cachefilename, |
---|
| 1008 | worker->priv->uid, |
---|
| 1009 | MAX_FILE_SIZE); |
---|
| 1010 | |
---|
| 1011 | if (res) { |
---|
| 1012 | GFile *src_file; |
---|
| 1013 | GFile *dst_file; |
---|
| 1014 | GError *error; |
---|
| 1015 | |
---|
| 1016 | src_file = g_file_new_for_path (userfilename); |
---|
| 1017 | dst_file = g_file_new_for_path (cachefilename); |
---|
| 1018 | |
---|
| 1019 | error = NULL; |
---|
| 1020 | res = g_file_copy (src_file, |
---|
| 1021 | dst_file, |
---|
| 1022 | G_FILE_COPY_OVERWRITE | |
---|
| 1023 | G_FILE_COPY_NOFOLLOW_SYMLINKS, |
---|
| 1024 | NULL, |
---|
| 1025 | NULL, |
---|
| 1026 | NULL, |
---|
| 1027 | &error); |
---|
| 1028 | |
---|
| 1029 | if (! res) { |
---|
| 1030 | g_warning ("Could not copy file to cache: %s", |
---|
| 1031 | error->message); |
---|
| 1032 | g_error_free (error); |
---|
| 1033 | } else { |
---|
| 1034 | chown (cachefilename, |
---|
| 1035 | worker->priv->uid, |
---|
| 1036 | worker->priv->gid); |
---|
| 1037 | g_chmod (cachefilename, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); |
---|
| 1038 | g_debug ("Copy successful"); |
---|
| 1039 | } |
---|
| 1040 | |
---|
| 1041 | g_object_unref (src_file); |
---|
| 1042 | g_object_unref (dst_file); |
---|
| 1043 | } else { |
---|
| 1044 | g_debug ("Not copying file %s to cache", |
---|
| 1045 | userfilename); |
---|
| 1046 | } |
---|
| 1047 | return res; |
---|
| 1048 | } |
---|
| 1049 | |
---|
| 1050 | static char * |
---|
| 1051 | gdm_session_worker_create_cachedir (GdmSessionWorker *worker) |
---|
| 1052 | { |
---|
| 1053 | struct stat statbuf; |
---|
| 1054 | char *cachedir; |
---|
| 1055 | int r; |
---|
| 1056 | |
---|
| 1057 | cachedir = g_build_filename (GDM_CACHE_DIR, |
---|
| 1058 | worker->priv->username, |
---|
| 1059 | NULL); |
---|
| 1060 | |
---|
| 1061 | /* Verify user cache directory exists, create if needed */ |
---|
| 1062 | r = g_stat (cachedir, &statbuf); |
---|
| 1063 | if (r < 0) { |
---|
| 1064 | g_debug ("Making user cache directory %s", cachedir); |
---|
| 1065 | g_mkdir (cachedir, |
---|
| 1066 | S_IRWXU | S_IXGRP | S_IRGRP | S_IXOTH | S_IROTH); |
---|
| 1067 | g_chmod (cachedir, |
---|
| 1068 | S_IRWXU | S_IXGRP | S_IRGRP | S_IXOTH | S_IROTH); |
---|
| 1069 | } |
---|
| 1070 | chown (cachedir, worker->priv->uid, worker->priv->gid); |
---|
| 1071 | |
---|
| 1072 | return cachedir; |
---|
| 1073 | } |
---|
| 1074 | |
---|
| 1075 | static void |
---|
| 1076 | gdm_session_worker_cache_userfiles (GdmSessionWorker *worker) |
---|
| 1077 | { |
---|
| 1078 | struct passwd *passwd_entry; |
---|
| 1079 | char *cachedir; |
---|
| 1080 | char *cachefile; |
---|
| 1081 | char *userfile; |
---|
| 1082 | gboolean res; |
---|
| 1083 | |
---|
| 1084 | passwd_entry = getpwnam (worker->priv->username); |
---|
| 1085 | if (passwd_entry == NULL) |
---|
| 1086 | return; |
---|
| 1087 | |
---|
| 1088 | cachedir = gdm_session_worker_create_cachedir (worker); |
---|
| 1089 | |
---|
| 1090 | g_debug ("Copying user dmrc file to cache"); |
---|
| 1091 | cachefile = g_build_filename (cachedir, "dmrc", NULL); |
---|
| 1092 | userfile = g_build_filename (passwd_entry->pw_dir, ".dmrc", NULL); |
---|
| 1093 | |
---|
| 1094 | gdm_cache_copy_file (worker, userfile, cachefile); |
---|
| 1095 | g_free (cachefile); |
---|
| 1096 | g_free (userfile); |
---|
| 1097 | |
---|
| 1098 | g_debug ("Copying user face file to cache"); |
---|
| 1099 | cachefile = g_build_filename (cachedir, |
---|
| 1100 | "face", |
---|
| 1101 | NULL); |
---|
| 1102 | |
---|
| 1103 | /* First, try "~/.face" */ |
---|
| 1104 | userfile = g_build_filename (passwd_entry->pw_dir, ".face", NULL); |
---|
| 1105 | res = gdm_cache_copy_file (worker, userfile, cachefile); |
---|
| 1106 | |
---|
| 1107 | /* Next, try "~/.face.icon" */ |
---|
| 1108 | if (!res) { |
---|
| 1109 | g_free (userfile); |
---|
| 1110 | userfile = g_build_filename (passwd_entry->pw_dir, |
---|
| 1111 | ".face.icon", |
---|
| 1112 | NULL); |
---|
| 1113 | res = gdm_cache_copy_file (worker, |
---|
| 1114 | userfile, |
---|
| 1115 | cachefile); |
---|
| 1116 | } |
---|
| 1117 | |
---|
| 1118 | /* Still nothing, try the user's personal GDM config */ |
---|
| 1119 | if (!res) { |
---|
| 1120 | char *tempfilename; |
---|
| 1121 | |
---|
| 1122 | tempfilename = g_build_filename (passwd_entry->pw_dir, |
---|
| 1123 | ".gnome", |
---|
| 1124 | "gdm", |
---|
| 1125 | NULL); |
---|
| 1126 | |
---|
| 1127 | g_debug ("Checking user's ~/.gnome/gdm file"); |
---|
| 1128 | res = check_user_copy_file (tempfilename, |
---|
| 1129 | NULL, |
---|
| 1130 | worker->priv->uid, |
---|
| 1131 | MAX_FILE_SIZE); |
---|
| 1132 | if (res) { |
---|
| 1133 | GKeyFile *keyfile; |
---|
| 1134 | |
---|
| 1135 | g_free (userfile); |
---|
| 1136 | |
---|
| 1137 | keyfile = g_key_file_new (); |
---|
| 1138 | g_key_file_load_from_file (keyfile, |
---|
| 1139 | userfile, |
---|
| 1140 | G_KEY_FILE_NONE, |
---|
| 1141 | NULL); |
---|
| 1142 | |
---|
| 1143 | userfile = g_key_file_get_string (keyfile, |
---|
| 1144 | "face", |
---|
| 1145 | "picture", |
---|
| 1146 | NULL); |
---|
| 1147 | res = gdm_cache_copy_file (worker, |
---|
| 1148 | userfile, |
---|
| 1149 | cachefile); |
---|
| 1150 | |
---|
| 1151 | g_key_file_free (keyfile); |
---|
| 1152 | } |
---|
| 1153 | g_free (tempfilename); |
---|
| 1154 | } |
---|
| 1155 | |
---|
| 1156 | g_free (cachedir); |
---|
| 1157 | g_free (cachefile); |
---|
| 1158 | g_free (userfile); |
---|
| 1159 | } |
---|
| 1160 | |
---|
| 1161 | static void |
---|
| 1162 | gdm_session_worker_uninitialize_pam (GdmSessionWorker *worker, |
---|
| 1163 | int status) |
---|
| 1164 | { |
---|
| 1165 | g_debug ("GdmSessionWorker: uninitializing PAM"); |
---|
| 1166 | |
---|
| 1167 | if (worker->priv->pam_handle == NULL) |
---|
| 1168 | return; |
---|
| 1169 | |
---|
| 1170 | if (worker->priv->state >= GDM_SESSION_WORKER_STATE_SESSION_OPENED) { |
---|
| 1171 | gdm_session_worker_cache_userfiles (worker); |
---|
| 1172 | pam_close_session (worker->priv->pam_handle, 0); |
---|
| 1173 | gdm_session_auditor_report_logout (worker->priv->auditor); |
---|
| 1174 | |
---|
| 1175 | #ifdef HAVE_LOGINDEVPERM |
---|
| 1176 | /* |
---|
| 1177 | * Only do logindevperm processing if /dev/console or |
---|
| 1178 | * a device associated with a VT |
---|
| 1179 | */ |
---|
| 1180 | if (worker->priv->display_device != NULL && |
---|
| 1181 | (strncmp (worker->priv->display_device, "/dev/vt/", strlen ("/dev/vt/")) == 0 || |
---|
| 1182 | strcmp (worker->priv->display_device, "/dev/console") == 0)) { |
---|
| 1183 | g_debug ("Logindevperm logout for user %s, device %s", |
---|
| 1184 | worker->priv->username, |
---|
| 1185 | worker->priv->display_device); |
---|
| 1186 | (void) di_devperm_logout (worker->priv->display_device); |
---|
| 1187 | } |
---|
| 1188 | #endif /* HAVE_LOGINDEVPERM */ |
---|
| 1189 | |
---|
| 1190 | } else { |
---|
| 1191 | void *p; |
---|
| 1192 | |
---|
| 1193 | if ((pam_get_item (worker->priv->pam_handle, PAM_USER, &p)) == PAM_SUCCESS) { |
---|
| 1194 | gdm_session_auditor_set_username (worker->priv->auditor, (const char *)p); |
---|
| 1195 | } |
---|
| 1196 | |
---|
| 1197 | gdm_session_auditor_report_login_failure (worker->priv->auditor, |
---|
| 1198 | status, |
---|
| 1199 | pam_strerror (worker->priv->pam_handle, status)); |
---|
| 1200 | } |
---|
| 1201 | |
---|
| 1202 | if (worker->priv->state >= GDM_SESSION_WORKER_STATE_ACCREDITED) { |
---|
| 1203 | pam_setcred (worker->priv->pam_handle, PAM_DELETE_CRED); |
---|
| 1204 | } |
---|
| 1205 | |
---|
| 1206 | pam_end (worker->priv->pam_handle, status); |
---|
| 1207 | worker->priv->pam_handle = NULL; |
---|
| 1208 | |
---|
| 1209 | gdm_session_worker_stop_auditor (worker); |
---|
| 1210 | |
---|
| 1211 | g_debug ("GdmSessionWorker: state NONE"); |
---|
| 1212 | worker->priv->state = GDM_SESSION_WORKER_STATE_NONE; |
---|
| 1213 | } |
---|
| 1214 | |
---|
| 1215 | static char * |
---|
| 1216 | _get_tty_for_pam (const char *x11_display_name, |
---|
| 1217 | const char *display_device) |
---|
| 1218 | { |
---|
| 1219 | #ifdef __sun |
---|
| 1220 | return g_strdup (display_device); |
---|
| 1221 | #else |
---|
| 1222 | return g_strdup (x11_display_name); |
---|
| 1223 | #endif |
---|
| 1224 | } |
---|
| 1225 | |
---|
| 1226 | #ifdef PAM_XAUTHDATA |
---|
| 1227 | static struct pam_xauth_data * |
---|
| 1228 | _get_xauth_for_pam (const char *x11_authority_file) |
---|
| 1229 | { |
---|
| 1230 | FILE *fh; |
---|
| 1231 | Xauth *auth = NULL; |
---|
| 1232 | struct pam_xauth_data *retval = NULL; |
---|
| 1233 | gsize len = sizeof (*retval) + 1; |
---|
| 1234 | |
---|
| 1235 | fh = fopen (x11_authority_file, "r"); |
---|
| 1236 | if (fh) { |
---|
| 1237 | auth = XauReadAuth (fh); |
---|
| 1238 | fclose (fh); |
---|
| 1239 | } |
---|
| 1240 | if (auth) { |
---|
| 1241 | len += auth->name_length + auth->data_length; |
---|
| 1242 | retval = g_malloc0 (len); |
---|
| 1243 | } |
---|
| 1244 | if (retval) { |
---|
| 1245 | retval->namelen = auth->name_length; |
---|
| 1246 | retval->name = (char *) (retval + 1); |
---|
| 1247 | memcpy (retval->name, auth->name, auth->name_length); |
---|
| 1248 | retval->datalen = auth->data_length; |
---|
| 1249 | retval->data = retval->name + auth->name_length + 1; |
---|
| 1250 | memcpy (retval->data, auth->data, auth->data_length); |
---|
| 1251 | } |
---|
| 1252 | XauDisposeAuth (auth); |
---|
| 1253 | return retval; |
---|
| 1254 | } |
---|
| 1255 | #endif |
---|
| 1256 | |
---|
| 1257 | static gboolean |
---|
| 1258 | gdm_session_worker_initialize_pam (GdmSessionWorker *worker, |
---|
| 1259 | const char *service, |
---|
| 1260 | const char *username, |
---|
| 1261 | const char *hostname, |
---|
| 1262 | const char *x11_display_name, |
---|
| 1263 | const char *x11_authority_file, |
---|
| 1264 | const char *display_device, |
---|
| 1265 | GError **error) |
---|
| 1266 | { |
---|
| 1267 | struct pam_conv pam_conversation; |
---|
| 1268 | #ifdef PAM_XAUTHDATA |
---|
| 1269 | struct pam_xauth_data *pam_xauth; |
---|
| 1270 | #endif |
---|
| 1271 | int error_code; |
---|
| 1272 | char *pam_tty; |
---|
| 1273 | |
---|
| 1274 | g_assert (worker->priv->pam_handle == NULL); |
---|
| 1275 | |
---|
| 1276 | g_debug ("GdmSessionWorker: initializing PAM"); |
---|
| 1277 | |
---|
| 1278 | pam_conversation.conv = (GdmSessionWorkerPamNewMessagesFunc) gdm_session_worker_pam_new_messages_handler; |
---|
| 1279 | pam_conversation.appdata_ptr = worker; |
---|
| 1280 | |
---|
| 1281 | gdm_session_worker_start_auditor (worker); |
---|
| 1282 | error_code = pam_start (service, |
---|
| 1283 | username, |
---|
| 1284 | &pam_conversation, |
---|
| 1285 | &worker->priv->pam_handle); |
---|
| 1286 | |
---|
| 1287 | if (error_code != PAM_SUCCESS) { |
---|
| 1288 | g_debug ("GdmSessionWorker: could not initialize PAM"); |
---|
| 1289 | /* we don't use pam_strerror here because it requires a valid |
---|
| 1290 | * pam handle, and if pam_start fails pam_handle is undefined |
---|
| 1291 | */ |
---|
| 1292 | g_set_error (error, |
---|
| 1293 | GDM_SESSION_WORKER_ERROR, |
---|
| 1294 | GDM_SESSION_WORKER_ERROR_AUTHENTICATING, |
---|
| 1295 | _("error initiating conversation with authentication system - %s"), |
---|
| 1296 | error_code == PAM_ABORT? _("general failure") : |
---|
| 1297 | error_code == PAM_BUF_ERR? _("out of memory") : |
---|
| 1298 | error_code == PAM_SYSTEM_ERR? _("application programmer error") : |
---|
| 1299 | _("unknown error")); |
---|
| 1300 | |
---|
| 1301 | goto out; |
---|
| 1302 | } |
---|
| 1303 | |
---|
| 1304 | /* set USER PROMPT */ |
---|
| 1305 | if (username == NULL) { |
---|
| 1306 | error_code = pam_set_item (worker->priv->pam_handle, PAM_USER_PROMPT, _("Username:")); |
---|
| 1307 | |
---|
| 1308 | if (error_code != PAM_SUCCESS) { |
---|
| 1309 | g_set_error (error, |
---|
| 1310 | GDM_SESSION_WORKER_ERROR, |
---|
| 1311 | GDM_SESSION_WORKER_ERROR_AUTHENTICATING, |
---|
| 1312 | _("error informing authentication system of preferred username prompt - %s"), |
---|
| 1313 | pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1314 | goto out; |
---|
| 1315 | } |
---|
| 1316 | } |
---|
| 1317 | |
---|
| 1318 | /* set RHOST */ |
---|
| 1319 | if (hostname != NULL && hostname[0] != '\0') { |
---|
| 1320 | error_code = pam_set_item (worker->priv->pam_handle, PAM_RHOST, hostname); |
---|
| 1321 | |
---|
| 1322 | if (error_code != PAM_SUCCESS) { |
---|
| 1323 | g_set_error (error, |
---|
| 1324 | GDM_SESSION_WORKER_ERROR, |
---|
| 1325 | GDM_SESSION_WORKER_ERROR_AUTHENTICATING, |
---|
| 1326 | _("error informing authentication system of user's hostname - %s"), |
---|
| 1327 | pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1328 | goto out; |
---|
| 1329 | } |
---|
| 1330 | } |
---|
| 1331 | |
---|
| 1332 | /* set TTY */ |
---|
| 1333 | pam_tty = _get_tty_for_pam (x11_display_name, display_device); |
---|
| 1334 | error_code = pam_set_item (worker->priv->pam_handle, PAM_TTY, pam_tty); |
---|
| 1335 | g_free (pam_tty); |
---|
| 1336 | |
---|
| 1337 | if (error_code != PAM_SUCCESS) { |
---|
| 1338 | g_set_error (error, |
---|
| 1339 | GDM_SESSION_WORKER_ERROR, |
---|
| 1340 | GDM_SESSION_WORKER_ERROR_AUTHENTICATING, |
---|
| 1341 | _("error informing authentication system of user's console - %s"), |
---|
| 1342 | pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1343 | goto out; |
---|
| 1344 | } |
---|
| 1345 | |
---|
| 1346 | #ifdef PAM_XDISPLAY |
---|
| 1347 | /* set XDISPLAY */ |
---|
| 1348 | error_code = pam_set_item (worker->priv->pam_handle, PAM_XDISPLAY, x11_display_name); |
---|
| 1349 | |
---|
| 1350 | if (error_code != PAM_SUCCESS) { |
---|
| 1351 | g_set_error (error, |
---|
| 1352 | GDM_SESSION_WORKER_ERROR, |
---|
| 1353 | GDM_SESSION_WORKER_ERROR_AUTHENTICATING, |
---|
| 1354 | _("error informing authentication system of display string - %s"), |
---|
| 1355 | pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1356 | goto out; |
---|
| 1357 | } |
---|
| 1358 | #endif |
---|
| 1359 | #ifdef PAM_XAUTHDATA |
---|
| 1360 | /* set XAUTHDATA */ |
---|
| 1361 | pam_xauth = _get_xauth_for_pam (x11_authority_file); |
---|
| 1362 | error_code = pam_set_item (worker->priv->pam_handle, PAM_XAUTHDATA, pam_xauth); |
---|
| 1363 | g_free (pam_xauth); |
---|
| 1364 | |
---|
| 1365 | if (error_code != PAM_SUCCESS) { |
---|
| 1366 | g_set_error (error, |
---|
| 1367 | GDM_SESSION_WORKER_ERROR, |
---|
| 1368 | GDM_SESSION_WORKER_ERROR_AUTHENTICATING, |
---|
| 1369 | _("error informing authentication system of display xauth credentials - %s"), |
---|
| 1370 | pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1371 | goto out; |
---|
| 1372 | } |
---|
| 1373 | #endif |
---|
| 1374 | |
---|
| 1375 | g_debug ("GdmSessionWorker: state SETUP_COMPLETE"); |
---|
| 1376 | worker->priv->state = GDM_SESSION_WORKER_STATE_SETUP_COMPLETE; |
---|
| 1377 | |
---|
| 1378 | out: |
---|
| 1379 | if (error_code != PAM_SUCCESS) { |
---|
| 1380 | gdm_session_worker_uninitialize_pam (worker, error_code); |
---|
| 1381 | return FALSE; |
---|
| 1382 | } |
---|
| 1383 | |
---|
| 1384 | return TRUE; |
---|
| 1385 | } |
---|
| 1386 | |
---|
| 1387 | static gboolean |
---|
| 1388 | gdm_session_worker_authenticate_user (GdmSessionWorker *worker, |
---|
| 1389 | gboolean password_is_required, |
---|
| 1390 | GError **error) |
---|
| 1391 | { |
---|
| 1392 | int error_code; |
---|
| 1393 | int authentication_flags; |
---|
| 1394 | |
---|
| 1395 | g_debug ("GdmSessionWorker: authenticating user"); |
---|
| 1396 | |
---|
| 1397 | authentication_flags = 0; |
---|
| 1398 | |
---|
| 1399 | if (password_is_required) { |
---|
| 1400 | authentication_flags |= PAM_DISALLOW_NULL_AUTHTOK; |
---|
| 1401 | } |
---|
| 1402 | |
---|
| 1403 | /* blocking call, does the actual conversation */ |
---|
| 1404 | error_code = pam_authenticate (worker->priv->pam_handle, authentication_flags); |
---|
| 1405 | |
---|
| 1406 | if (error_code != PAM_SUCCESS) { |
---|
| 1407 | g_debug ("GdmSessionWorker: authentication returned %d: %s", error_code, pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1408 | |
---|
| 1409 | g_set_error (error, |
---|
| 1410 | GDM_SESSION_WORKER_ERROR, |
---|
| 1411 | GDM_SESSION_WORKER_ERROR_AUTHENTICATING, |
---|
| 1412 | "%s", pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1413 | goto out; |
---|
| 1414 | } |
---|
| 1415 | |
---|
| 1416 | g_debug ("GdmSessionWorker: state AUTHENTICATED"); |
---|
| 1417 | worker->priv->state = GDM_SESSION_WORKER_STATE_AUTHENTICATED; |
---|
| 1418 | |
---|
| 1419 | out: |
---|
| 1420 | if (error_code != PAM_SUCCESS) { |
---|
| 1421 | gdm_session_worker_uninitialize_pam (worker, error_code); |
---|
| 1422 | return FALSE; |
---|
| 1423 | } |
---|
| 1424 | |
---|
| 1425 | return TRUE; |
---|
| 1426 | } |
---|
| 1427 | |
---|
| 1428 | static gboolean |
---|
| 1429 | gdm_session_worker_authorize_user (GdmSessionWorker *worker, |
---|
| 1430 | gboolean password_is_required, |
---|
| 1431 | GError **error) |
---|
| 1432 | { |
---|
| 1433 | int error_code; |
---|
| 1434 | int authentication_flags; |
---|
| 1435 | |
---|
| 1436 | g_debug ("GdmSessionWorker: determining if authenticated user is authorized to session"); |
---|
| 1437 | |
---|
| 1438 | authentication_flags = 0; |
---|
| 1439 | |
---|
| 1440 | if (password_is_required) { |
---|
| 1441 | authentication_flags |= PAM_DISALLOW_NULL_AUTHTOK; |
---|
| 1442 | } |
---|
| 1443 | |
---|
| 1444 | /* check that the account isn't disabled or expired |
---|
| 1445 | */ |
---|
| 1446 | error_code = pam_acct_mgmt (worker->priv->pam_handle, authentication_flags); |
---|
| 1447 | |
---|
| 1448 | /* it's possible that the user needs to change their password or pin code |
---|
| 1449 | */ |
---|
| 1450 | if (error_code == PAM_NEW_AUTHTOK_REQD) { |
---|
| 1451 | error_code = pam_chauthtok (worker->priv->pam_handle, PAM_CHANGE_EXPIRED_AUTHTOK); |
---|
| 1452 | |
---|
| 1453 | if (error_code != PAM_SUCCESS) { |
---|
| 1454 | gdm_session_auditor_report_password_change_failure (worker->priv->auditor); |
---|
| 1455 | } else { |
---|
| 1456 | gdm_session_auditor_report_password_changed (worker->priv->auditor); |
---|
| 1457 | } |
---|
| 1458 | } |
---|
| 1459 | |
---|
| 1460 | if (error_code != PAM_SUCCESS) { |
---|
| 1461 | g_debug ("GdmSessionWorker: user is not authorized to log in: %s", |
---|
| 1462 | pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1463 | g_set_error (error, |
---|
| 1464 | GDM_SESSION_WORKER_ERROR, |
---|
| 1465 | GDM_SESSION_WORKER_ERROR_AUTHORIZING, |
---|
| 1466 | "%s", pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1467 | goto out; |
---|
| 1468 | } |
---|
| 1469 | |
---|
| 1470 | g_debug ("GdmSessionWorker: state AUTHORIZED"); |
---|
| 1471 | worker->priv->state = GDM_SESSION_WORKER_STATE_AUTHORIZED; |
---|
| 1472 | |
---|
| 1473 | out: |
---|
| 1474 | if (error_code != PAM_SUCCESS) { |
---|
| 1475 | gdm_session_worker_uninitialize_pam (worker, error_code); |
---|
| 1476 | return FALSE; |
---|
| 1477 | } |
---|
| 1478 | |
---|
| 1479 | return TRUE; |
---|
| 1480 | } |
---|
| 1481 | |
---|
| 1482 | static void |
---|
| 1483 | gdm_session_worker_set_environment_variable (GdmSessionWorker *worker, |
---|
| 1484 | const char *key, |
---|
| 1485 | const char *value) |
---|
| 1486 | { |
---|
| 1487 | /* FIXME: maybe we should use use pam_putenv instead of our |
---|
| 1488 | * own hash table, so pam can override our choices if it knows |
---|
| 1489 | * better? |
---|
| 1490 | */ |
---|
| 1491 | g_hash_table_replace (worker->priv->environment, |
---|
| 1492 | g_strdup (key), |
---|
| 1493 | g_strdup (value)); |
---|
| 1494 | } |
---|
| 1495 | |
---|
| 1496 | static void |
---|
| 1497 | gdm_session_worker_update_environment_from_passwd_info (GdmSessionWorker *worker, |
---|
| 1498 | uid_t uid, |
---|
| 1499 | gid_t gid, |
---|
| 1500 | const char *home, |
---|
| 1501 | const char *shell) |
---|
| 1502 | { |
---|
| 1503 | gdm_session_worker_set_environment_variable (worker, "LOGNAME", worker->priv->username); |
---|
| 1504 | gdm_session_worker_set_environment_variable (worker, "USER", worker->priv->username); |
---|
| 1505 | gdm_session_worker_set_environment_variable (worker, "USERNAME", worker->priv->username); |
---|
| 1506 | gdm_session_worker_set_environment_variable (worker, "HOME", home); |
---|
| 1507 | gdm_session_worker_set_environment_variable (worker, "SHELL", shell); |
---|
| 1508 | } |
---|
| 1509 | |
---|
| 1510 | static gboolean |
---|
| 1511 | gdm_session_worker_environment_variable_is_set (GdmSessionWorker *worker, |
---|
| 1512 | const char *name) |
---|
| 1513 | { |
---|
| 1514 | return g_hash_table_lookup (worker->priv->environment, name) != NULL; |
---|
| 1515 | } |
---|
| 1516 | |
---|
| 1517 | static gboolean |
---|
| 1518 | _change_user (GdmSessionWorker *worker, |
---|
| 1519 | uid_t uid, |
---|
| 1520 | gid_t gid) |
---|
| 1521 | { |
---|
| 1522 | gboolean ret; |
---|
| 1523 | |
---|
| 1524 | ret = FALSE; |
---|
| 1525 | |
---|
| 1526 | #ifdef THE_MAN_PAGE_ISNT_LYING |
---|
| 1527 | /* pam_setcred wants to be called as the authenticated user |
---|
| 1528 | * but pam_open_session needs to be called as super-user. |
---|
| 1529 | * |
---|
| 1530 | * Set the real uid and gid to the user and give the user a |
---|
| 1531 | * temporary super-user effective id. |
---|
| 1532 | */ |
---|
| 1533 | if (setreuid (uid, GDM_SESSION_ROOT_UID) < 0) { |
---|
| 1534 | return FALSE; |
---|
| 1535 | } |
---|
| 1536 | #endif |
---|
| 1537 | worker->priv->uid = uid; |
---|
| 1538 | worker->priv->gid = gid; |
---|
| 1539 | |
---|
| 1540 | if (setgid (gid) < 0) { |
---|
| 1541 | return FALSE; |
---|
| 1542 | } |
---|
| 1543 | |
---|
| 1544 | if (initgroups (worker->priv->username, gid) < 0) { |
---|
| 1545 | return FALSE; |
---|
| 1546 | } |
---|
| 1547 | |
---|
| 1548 | return TRUE; |
---|
| 1549 | } |
---|
| 1550 | |
---|
| 1551 | static gboolean |
---|
| 1552 | _lookup_passwd_info (const char *username, |
---|
| 1553 | uid_t *uidp, |
---|
| 1554 | gid_t *gidp, |
---|
| 1555 | char **homep, |
---|
| 1556 | char **shellp) |
---|
| 1557 | { |
---|
| 1558 | gboolean ret; |
---|
| 1559 | struct passwd *passwd_entry; |
---|
| 1560 | struct passwd passwd_buffer; |
---|
| 1561 | char *aux_buffer; |
---|
| 1562 | long required_aux_buffer_size; |
---|
| 1563 | gsize aux_buffer_size; |
---|
| 1564 | |
---|
| 1565 | ret = FALSE; |
---|
| 1566 | aux_buffer = NULL; |
---|
| 1567 | aux_buffer_size = 0; |
---|
| 1568 | |
---|
| 1569 | required_aux_buffer_size = sysconf (_SC_GETPW_R_SIZE_MAX); |
---|
| 1570 | |
---|
| 1571 | if (required_aux_buffer_size < 0) { |
---|
| 1572 | aux_buffer_size = GDM_PASSWD_AUXILLARY_BUFFER_SIZE; |
---|
| 1573 | } else { |
---|
| 1574 | aux_buffer_size = (gsize) required_aux_buffer_size; |
---|
| 1575 | } |
---|
| 1576 | |
---|
| 1577 | aux_buffer = g_slice_alloc0 (aux_buffer_size); |
---|
| 1578 | |
---|
| 1579 | /* we use the _r variant of getpwnam() |
---|
| 1580 | * (with its weird semantics) so that the |
---|
| 1581 | * passwd_entry doesn't potentially get stomped on |
---|
| 1582 | * by a PAM module |
---|
| 1583 | */ |
---|
| 1584 | passwd_entry = NULL; |
---|
| 1585 | #ifdef HAVE_POSIX_GETPWNAM_R |
---|
| 1586 | errno = getpwnam_r (username, |
---|
| 1587 | &passwd_buffer, |
---|
| 1588 | aux_buffer, |
---|
| 1589 | (size_t) aux_buffer_size, |
---|
| 1590 | &passwd_entry); |
---|
| 1591 | #else |
---|
| 1592 | passwd_entry = getpwnam_r (username, |
---|
| 1593 | &passwd_buffer, |
---|
| 1594 | aux_buffer, |
---|
| 1595 | (size_t) aux_buffer_size); |
---|
| 1596 | errno = 0; |
---|
| 1597 | #endif /* !HAVE_POSIX_GETPWNAM_R */ |
---|
| 1598 | |
---|
| 1599 | if (errno != 0) { |
---|
| 1600 | g_warning ("%s", g_strerror (errno)); |
---|
| 1601 | goto out; |
---|
| 1602 | } |
---|
| 1603 | |
---|
| 1604 | if (passwd_entry == NULL) { |
---|
| 1605 | goto out; |
---|
| 1606 | } |
---|
| 1607 | |
---|
| 1608 | if (uidp != NULL) { |
---|
| 1609 | *uidp = passwd_entry->pw_uid; |
---|
| 1610 | } |
---|
| 1611 | if (gidp != NULL) { |
---|
| 1612 | *gidp = passwd_entry->pw_gid; |
---|
| 1613 | } |
---|
| 1614 | if (homep != NULL) { |
---|
| 1615 | *homep = g_strdup (passwd_entry->pw_dir); |
---|
| 1616 | } |
---|
| 1617 | if (shellp != NULL) { |
---|
| 1618 | *shellp = g_strdup (passwd_entry->pw_shell); |
---|
| 1619 | } |
---|
| 1620 | ret = TRUE; |
---|
| 1621 | out: |
---|
| 1622 | if (aux_buffer != NULL) { |
---|
| 1623 | g_assert (aux_buffer_size > 0); |
---|
| 1624 | g_slice_free1 (aux_buffer_size, aux_buffer); |
---|
| 1625 | } |
---|
| 1626 | |
---|
| 1627 | return ret; |
---|
| 1628 | } |
---|
| 1629 | |
---|
| 1630 | static gboolean |
---|
| 1631 | gdm_session_worker_accredit_user (GdmSessionWorker *worker, |
---|
| 1632 | GError **error) |
---|
| 1633 | { |
---|
| 1634 | gboolean ret; |
---|
| 1635 | gboolean res; |
---|
| 1636 | uid_t uid; |
---|
| 1637 | gid_t gid; |
---|
| 1638 | char *shell; |
---|
| 1639 | char *home; |
---|
| 1640 | int error_code; |
---|
| 1641 | |
---|
| 1642 | ret = FALSE; |
---|
| 1643 | |
---|
| 1644 | if (worker->priv->username == NULL) { |
---|
| 1645 | g_debug ("GdmSessionWorker: Username not set"); |
---|
| 1646 | error_code = PAM_USER_UNKNOWN; |
---|
| 1647 | g_set_error (error, |
---|
| 1648 | GDM_SESSION_WORKER_ERROR, |
---|
| 1649 | GDM_SESSION_WORKER_ERROR_GIVING_CREDENTIALS, |
---|
| 1650 | _("no user account available")); |
---|
| 1651 | goto out; |
---|
| 1652 | } |
---|
| 1653 | |
---|
| 1654 | home = NULL; |
---|
| 1655 | shell = NULL; |
---|
| 1656 | uid = 0; |
---|
| 1657 | gid = 0; |
---|
| 1658 | res = _lookup_passwd_info (worker->priv->username, |
---|
| 1659 | &uid, |
---|
| 1660 | &gid, |
---|
| 1661 | &home, |
---|
| 1662 | &shell); |
---|
| 1663 | if (! res) { |
---|
| 1664 | g_debug ("GdmSessionWorker: Unable to lookup account info"); |
---|
| 1665 | error_code = PAM_AUTHINFO_UNAVAIL; |
---|
| 1666 | g_set_error (error, |
---|
| 1667 | GDM_SESSION_WORKER_ERROR, |
---|
| 1668 | GDM_SESSION_WORKER_ERROR_GIVING_CREDENTIALS, |
---|
| 1669 | _("no user account available")); |
---|
| 1670 | goto out; |
---|
| 1671 | } |
---|
| 1672 | |
---|
| 1673 | gdm_session_worker_update_environment_from_passwd_info (worker, |
---|
| 1674 | uid, |
---|
| 1675 | gid, |
---|
| 1676 | home, |
---|
| 1677 | shell); |
---|
| 1678 | |
---|
| 1679 | /* Let's give the user a default PATH if he doesn't already have one |
---|
| 1680 | */ |
---|
| 1681 | if (!gdm_session_worker_environment_variable_is_set (worker, "PATH")) { |
---|
| 1682 | if (strcmp (BINDIR, "/usr/bin") == 0) { |
---|
| 1683 | gdm_session_worker_set_environment_variable (worker, "PATH", |
---|
| 1684 | GDM_SESSION_DEFAULT_PATH); |
---|
| 1685 | } else { |
---|
| 1686 | gdm_session_worker_set_environment_variable (worker, "PATH", |
---|
| 1687 | BINDIR ":" GDM_SESSION_DEFAULT_PATH); |
---|
| 1688 | } |
---|
| 1689 | } |
---|
| 1690 | |
---|
| 1691 | if (! _change_user (worker, uid, gid)) { |
---|
| 1692 | g_debug ("GdmSessionWorker: Unable to change to user"); |
---|
| 1693 | error_code = PAM_SYSTEM_ERR; |
---|
| 1694 | g_set_error (error, GDM_SESSION_WORKER_ERROR, |
---|
| 1695 | GDM_SESSION_WORKER_ERROR_GIVING_CREDENTIALS, |
---|
| 1696 | "%s", _("Unable to change to user")); |
---|
| 1697 | goto out; |
---|
| 1698 | } |
---|
| 1699 | |
---|
| 1700 | error_code = pam_setcred (worker->priv->pam_handle, worker->priv->cred_flags); |
---|
| 1701 | |
---|
| 1702 | if (error_code != PAM_SUCCESS) { |
---|
| 1703 | g_set_error (error, |
---|
| 1704 | GDM_SESSION_WORKER_ERROR, |
---|
| 1705 | GDM_SESSION_WORKER_ERROR_GIVING_CREDENTIALS, |
---|
| 1706 | "%s", |
---|
| 1707 | pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 1708 | goto out; |
---|
| 1709 | } |
---|
| 1710 | |
---|
| 1711 | ret = TRUE; |
---|
| 1712 | |
---|
| 1713 | out: |
---|
| 1714 | if (ret) { |
---|
| 1715 | g_debug ("GdmSessionWorker: state ACCREDITED"); |
---|
| 1716 | ret = TRUE; |
---|
| 1717 | gdm_session_auditor_report_user_accredited (worker->priv->auditor); |
---|
| 1718 | worker->priv->state = GDM_SESSION_WORKER_STATE_ACCREDITED; |
---|
| 1719 | } else { |
---|
| 1720 | gdm_session_worker_uninitialize_pam (worker, error_code); |
---|
| 1721 | } |
---|
| 1722 | |
---|
| 1723 | return ret; |
---|
| 1724 | } |
---|
| 1725 | |
---|
| 1726 | static void |
---|
| 1727 | gdm_session_worker_update_environment_from_pam (GdmSessionWorker *worker) |
---|
| 1728 | { |
---|
| 1729 | char **environment; |
---|
| 1730 | gsize i; |
---|
| 1731 | |
---|
| 1732 | environment = pam_getenvlist (worker->priv->pam_handle); |
---|
| 1733 | |
---|
| 1734 | for (i = 0; environment[i] != NULL; i++) { |
---|
| 1735 | char **key_and_value; |
---|
| 1736 | |
---|
| 1737 | key_and_value = g_strsplit (environment[i], "=", 2); |
---|
| 1738 | |
---|
| 1739 | gdm_session_worker_set_environment_variable (worker, key_and_value[0], key_and_value[1]); |
---|
| 1740 | |
---|
| 1741 | g_strfreev (key_and_value); |
---|
| 1742 | } |
---|
| 1743 | |
---|
| 1744 | for (i = 0; environment[i]; i++) { |
---|
| 1745 | free (environment[i]); |
---|
| 1746 | } |
---|
| 1747 | |
---|
| 1748 | free (environment); |
---|
| 1749 | } |
---|
| 1750 | |
---|
| 1751 | static void |
---|
| 1752 | gdm_session_worker_fill_environment_array (const char *key, |
---|
| 1753 | const char *value, |
---|
| 1754 | GPtrArray *environment) |
---|
| 1755 | { |
---|
| 1756 | char *variable; |
---|
| 1757 | |
---|
| 1758 | if (value == NULL) |
---|
| 1759 | return; |
---|
| 1760 | |
---|
| 1761 | variable = g_strdup_printf ("%s=%s", key, value); |
---|
| 1762 | |
---|
| 1763 | g_ptr_array_add (environment, variable); |
---|
| 1764 | } |
---|
| 1765 | |
---|
| 1766 | static char ** |
---|
| 1767 | gdm_session_worker_get_environment (GdmSessionWorker *worker) |
---|
| 1768 | { |
---|
| 1769 | GPtrArray *environment; |
---|
| 1770 | |
---|
| 1771 | environment = g_ptr_array_new (); |
---|
| 1772 | g_hash_table_foreach (worker->priv->environment, |
---|
| 1773 | (GHFunc) gdm_session_worker_fill_environment_array, |
---|
| 1774 | environment); |
---|
| 1775 | g_ptr_array_add (environment, NULL); |
---|
| 1776 | |
---|
| 1777 | return (char **) g_ptr_array_free (environment, FALSE); |
---|
| 1778 | } |
---|
| 1779 | |
---|
| 1780 | static void |
---|
| 1781 | register_ck_session (GdmSessionWorker *worker) |
---|
| 1782 | { |
---|
| 1783 | const char *session_cookie; |
---|
| 1784 | gboolean res; |
---|
| 1785 | |
---|
| 1786 | session_cookie = NULL; |
---|
| 1787 | res = open_ck_session (worker); |
---|
| 1788 | if (res) { |
---|
| 1789 | session_cookie = ck_connector_get_cookie (worker->priv->ckc); |
---|
| 1790 | } |
---|
| 1791 | if (session_cookie != NULL) { |
---|
| 1792 | gdm_session_worker_set_environment_variable (worker, |
---|
| 1793 | "XDG_SESSION_COOKIE", |
---|
| 1794 | session_cookie); |
---|
| 1795 | } |
---|
| 1796 | } |
---|
| 1797 | |
---|
| 1798 | static void |
---|
| 1799 | session_worker_child_watch (GPid pid, |
---|
| 1800 | int status, |
---|
| 1801 | GdmSessionWorker *worker) |
---|
| 1802 | { |
---|
| 1803 | g_debug ("GdmSessionWorker: child (pid:%d) done (%s:%d)", |
---|
| 1804 | (int) pid, |
---|
| 1805 | WIFEXITED (status) ? "status" |
---|
| 1806 | : WIFSIGNALED (status) ? "signal" |
---|
| 1807 | : "unknown", |
---|
| 1808 | WIFEXITED (status) ? WEXITSTATUS (status) |
---|
| 1809 | : WIFSIGNALED (status) ? WTERMSIG (status) |
---|
| 1810 | : -1); |
---|
| 1811 | |
---|
| 1812 | if (WIFEXITED (status)) { |
---|
| 1813 | int code = WEXITSTATUS (status); |
---|
| 1814 | |
---|
| 1815 | send_dbus_int_method (worker->priv->connection, |
---|
| 1816 | "SessionExited", |
---|
| 1817 | code); |
---|
| 1818 | } else if (WIFSIGNALED (status)) { |
---|
| 1819 | int num = WTERMSIG (status); |
---|
| 1820 | |
---|
| 1821 | send_dbus_int_method (worker->priv->connection, |
---|
| 1822 | "SessionDied", |
---|
| 1823 | num); |
---|
| 1824 | } |
---|
| 1825 | |
---|
| 1826 | if (worker->priv->ckc != NULL) { |
---|
| 1827 | ck_connector_close_session (worker->priv->ckc, NULL); |
---|
| 1828 | ck_connector_unref (worker->priv->ckc); |
---|
| 1829 | worker->priv->ckc = NULL; |
---|
| 1830 | } |
---|
| 1831 | |
---|
| 1832 | gdm_session_worker_uninitialize_pam (worker, PAM_SUCCESS); |
---|
| 1833 | |
---|
| 1834 | worker->priv->child_pid = -1; |
---|
| 1835 | } |
---|
| 1836 | |
---|
| 1837 | static void |
---|
| 1838 | gdm_session_worker_watch_child (GdmSessionWorker *worker) |
---|
| 1839 | { |
---|
| 1840 | |
---|
| 1841 | worker->priv->child_watch_id = g_child_watch_add (worker->priv->child_pid, |
---|
| 1842 | (GChildWatchFunc)session_worker_child_watch, |
---|
| 1843 | worker); |
---|
| 1844 | |
---|
| 1845 | } |
---|
| 1846 | |
---|
| 1847 | static gboolean |
---|
| 1848 | _fd_is_normal_file (int fd) |
---|
| 1849 | { |
---|
| 1850 | struct stat file_info; |
---|
| 1851 | |
---|
| 1852 | if (fstat (fd, &file_info) < 0) { |
---|
| 1853 | return FALSE; |
---|
| 1854 | } |
---|
| 1855 | |
---|
| 1856 | return S_ISREG (file_info.st_mode); |
---|
| 1857 | } |
---|
| 1858 | |
---|
| 1859 | static int |
---|
| 1860 | _open_session_log (const char *dir) |
---|
| 1861 | { |
---|
| 1862 | int fd; |
---|
| 1863 | char *filename; |
---|
| 1864 | |
---|
| 1865 | filename = g_build_filename (dir, GDM_SESSION_LOG_FILENAME, NULL); |
---|
| 1866 | |
---|
| 1867 | if (g_access (dir, R_OK | W_OK | X_OK) == 0 && g_access (filename, R_OK | W_OK) == 0) { |
---|
| 1868 | char *filename_old; |
---|
| 1869 | |
---|
| 1870 | filename_old = g_strdup_printf ("%s.old", filename); |
---|
| 1871 | g_rename (filename, filename_old); |
---|
| 1872 | g_free (filename_old); |
---|
| 1873 | } |
---|
| 1874 | |
---|
| 1875 | fd = g_open (filename, O_RDWR | O_APPEND | O_CREAT, 0600); |
---|
| 1876 | |
---|
| 1877 | if (fd < 0 || !_fd_is_normal_file (fd)) { |
---|
| 1878 | char *temp_name; |
---|
| 1879 | |
---|
| 1880 | close (fd); |
---|
| 1881 | |
---|
| 1882 | temp_name = g_strdup_printf ("%s.XXXXXXXX", filename); |
---|
| 1883 | |
---|
| 1884 | fd = g_mkstemp (temp_name); |
---|
| 1885 | |
---|
| 1886 | if (fd < 0) { |
---|
| 1887 | g_free (temp_name); |
---|
| 1888 | goto out; |
---|
| 1889 | } |
---|
| 1890 | |
---|
| 1891 | g_warning ("session log '%s' is not a normal file, logging session to '%s' instead.\n", filename, |
---|
| 1892 | temp_name); |
---|
| 1893 | g_free (filename); |
---|
| 1894 | filename = temp_name; |
---|
| 1895 | } else { |
---|
| 1896 | if (ftruncate (fd, 0) < 0) { |
---|
| 1897 | close (fd); |
---|
| 1898 | fd = -1; |
---|
| 1899 | goto out; |
---|
| 1900 | } |
---|
| 1901 | } |
---|
| 1902 | |
---|
| 1903 | if (fchmod (fd, 0600) < 0) { |
---|
| 1904 | close (fd); |
---|
| 1905 | fd = -1; |
---|
| 1906 | goto out; |
---|
| 1907 | } |
---|
| 1908 | |
---|
| 1909 | |
---|
| 1910 | out: |
---|
| 1911 | g_free (filename); |
---|
| 1912 | |
---|
| 1913 | if (fd < 0) { |
---|
| 1914 | g_warning ("unable to log session"); |
---|
| 1915 | fd = g_open ("/dev/null", O_RDWR); |
---|
| 1916 | } |
---|
| 1917 | |
---|
| 1918 | return fd; |
---|
| 1919 | } |
---|
| 1920 | |
---|
| 1921 | static void |
---|
| 1922 | _save_user_settings (GdmSessionWorker *worker, |
---|
| 1923 | const char *home_dir) |
---|
| 1924 | { |
---|
| 1925 | GError *error; |
---|
| 1926 | |
---|
| 1927 | if (!gdm_session_settings_is_loaded (worker->priv->user_settings)) { |
---|
| 1928 | /* |
---|
| 1929 | * Even if the user did not change the defaults, there may |
---|
| 1930 | * be files to cache |
---|
| 1931 | */ |
---|
| 1932 | goto out; |
---|
| 1933 | } |
---|
| 1934 | |
---|
| 1935 | error = NULL; |
---|
| 1936 | if (!gdm_session_settings_save (worker->priv->user_settings, |
---|
| 1937 | home_dir, &error)) { |
---|
| 1938 | g_warning ("could not save session and language settings: %s", |
---|
| 1939 | error->message); |
---|
| 1940 | g_error_free (error); |
---|
| 1941 | } |
---|
| 1942 | |
---|
| 1943 | out: |
---|
| 1944 | gdm_session_worker_cache_userfiles (worker); |
---|
| 1945 | } |
---|
| 1946 | |
---|
| 1947 | static gboolean |
---|
| 1948 | gdm_session_worker_start_user_session (GdmSessionWorker *worker, |
---|
| 1949 | GError **error) |
---|
| 1950 | { |
---|
| 1951 | struct passwd *passwd_entry; |
---|
| 1952 | pid_t session_pid; |
---|
| 1953 | int error_code; |
---|
| 1954 | |
---|
| 1955 | g_debug ("GdmSessionWorker: querying pam for user environment"); |
---|
| 1956 | gdm_session_worker_update_environment_from_pam (worker); |
---|
| 1957 | |
---|
| 1958 | register_ck_session (worker); |
---|
| 1959 | |
---|
| 1960 | passwd_entry = getpwnam (worker->priv->username); |
---|
| 1961 | |
---|
| 1962 | #ifdef HAVE_LOGINDEVPERM |
---|
| 1963 | /* |
---|
| 1964 | * Only do logindevperm processing if /dev/console or |
---|
| 1965 | * a device associated with a VT |
---|
| 1966 | */ |
---|
| 1967 | if (worker->priv->display_device != NULL && |
---|
| 1968 | (strncmp (worker->priv->display_device, "/dev/vt/", strlen ("/dev/vt/")) == 0 || |
---|
| 1969 | strcmp (worker->priv->display_device, "/dev/console") == 0)) { |
---|
| 1970 | g_debug ("Logindevperm login for user %s, device %s", |
---|
| 1971 | worker->priv->username, |
---|
| 1972 | worker->priv->display_device); |
---|
| 1973 | (void) di_devperm_login (worker->priv->display_device, |
---|
| 1974 | passwd_entry->pw_uid, |
---|
| 1975 | passwd_entry->pw_gid, |
---|
| 1976 | NULL); |
---|
| 1977 | } |
---|
| 1978 | #endif /* HAVE_LOGINDEVPERM */ |
---|
| 1979 | |
---|
| 1980 | g_debug ("GdmSessionWorker: opening user session with program '%s'", |
---|
| 1981 | worker->priv->arguments[0]); |
---|
| 1982 | |
---|
| 1983 | error_code = PAM_SUCCESS; |
---|
| 1984 | |
---|
| 1985 | session_pid = fork (); |
---|
| 1986 | |
---|
| 1987 | if (session_pid < 0) { |
---|
| 1988 | g_set_error (error, |
---|
| 1989 | GDM_SESSION_WORKER_ERROR, |
---|
| 1990 | GDM_SESSION_WORKER_ERROR_OPENING_SESSION, |
---|
| 1991 | "%s", g_strerror (errno)); |
---|
| 1992 | error_code = PAM_ABORT; |
---|
| 1993 | goto out; |
---|
| 1994 | } |
---|
| 1995 | |
---|
| 1996 | if (session_pid == 0) { |
---|
| 1997 | char **environment; |
---|
| 1998 | char *cachedirname; |
---|
| 1999 | char *home_dir; |
---|
| 2000 | int fd; |
---|
| 2001 | |
---|
| 2002 | /* Make sure cachedir gets created before we drop to user */ |
---|
| 2003 | cachedirname = gdm_session_worker_create_cachedir (worker); |
---|
| 2004 | g_free (cachedirname); |
---|
| 2005 | |
---|
| 2006 | if (setuid (worker->priv->uid) < 0) { |
---|
| 2007 | g_debug ("GdmSessionWorker: could not reset uid - %s", g_strerror (errno)); |
---|
| 2008 | _exit (1); |
---|
| 2009 | } |
---|
| 2010 | |
---|
| 2011 | if (setsid () < 0) { |
---|
| 2012 | g_debug ("GdmSessionWorker: could not set pid '%u' as leader of new session and process group - %s", |
---|
| 2013 | (guint) getpid (), g_strerror (errno)); |
---|
| 2014 | _exit (2); |
---|
| 2015 | } |
---|
| 2016 | |
---|
| 2017 | environment = gdm_session_worker_get_environment (worker); |
---|
| 2018 | |
---|
| 2019 | g_assert (geteuid () == getuid ()); |
---|
| 2020 | |
---|
| 2021 | home_dir = g_hash_table_lookup (worker->priv->environment, |
---|
| 2022 | "HOME"); |
---|
| 2023 | |
---|
| 2024 | if ((home_dir == NULL) || g_chdir (home_dir) < 0) { |
---|
| 2025 | g_chdir ("/"); |
---|
| 2026 | } |
---|
| 2027 | |
---|
| 2028 | fd = open ("/dev/null", O_RDWR); |
---|
| 2029 | dup2 (fd, STDIN_FILENO); |
---|
| 2030 | close (fd); |
---|
| 2031 | |
---|
| 2032 | fd = _open_session_log (home_dir); |
---|
| 2033 | dup2 (fd, STDOUT_FILENO); |
---|
| 2034 | dup2 (fd, STDERR_FILENO); |
---|
| 2035 | close (fd); |
---|
| 2036 | |
---|
| 2037 | _save_user_settings (worker, home_dir); |
---|
| 2038 | |
---|
| 2039 | gdm_session_execute (worker->priv->arguments[0], |
---|
| 2040 | worker->priv->arguments, |
---|
| 2041 | environment, |
---|
| 2042 | TRUE); |
---|
| 2043 | |
---|
| 2044 | g_debug ("GdmSessionWorker: child '%s' could not be started - %s", |
---|
| 2045 | worker->priv->arguments[0], |
---|
| 2046 | g_strerror (errno)); |
---|
| 2047 | g_strfreev (environment); |
---|
| 2048 | |
---|
| 2049 | _exit (127); |
---|
| 2050 | } |
---|
| 2051 | |
---|
| 2052 | worker->priv->child_pid = session_pid; |
---|
| 2053 | |
---|
| 2054 | g_debug ("GdmSessionWorker: session opened creating reply..."); |
---|
| 2055 | g_assert (sizeof (GPid) <= sizeof (int)); |
---|
| 2056 | |
---|
| 2057 | g_debug ("GdmSessionWorker: state SESSION_STARTED"); |
---|
| 2058 | worker->priv->state = GDM_SESSION_WORKER_STATE_SESSION_STARTED; |
---|
| 2059 | |
---|
| 2060 | gdm_session_worker_watch_child (worker); |
---|
| 2061 | |
---|
| 2062 | out: |
---|
| 2063 | if (error_code != PAM_SUCCESS) { |
---|
| 2064 | gdm_session_worker_uninitialize_pam (worker, error_code); |
---|
| 2065 | return FALSE; |
---|
| 2066 | } |
---|
| 2067 | |
---|
| 2068 | return TRUE; |
---|
| 2069 | } |
---|
| 2070 | |
---|
| 2071 | static gboolean |
---|
| 2072 | gdm_session_worker_open_user_session (GdmSessionWorker *worker, |
---|
| 2073 | GError **error) |
---|
| 2074 | { |
---|
| 2075 | int error_code; |
---|
| 2076 | |
---|
| 2077 | g_assert (worker->priv->state == GDM_SESSION_WORKER_STATE_ACCREDITED); |
---|
| 2078 | g_assert (geteuid () == 0); |
---|
| 2079 | |
---|
| 2080 | error_code = pam_open_session (worker->priv->pam_handle, 0); |
---|
| 2081 | |
---|
| 2082 | if (error_code != PAM_SUCCESS) { |
---|
| 2083 | g_set_error (error, |
---|
| 2084 | GDM_SESSION_WORKER_ERROR, |
---|
| 2085 | GDM_SESSION_WORKER_ERROR_OPENING_SESSION, |
---|
| 2086 | "%s", pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 2087 | goto out; |
---|
| 2088 | } |
---|
| 2089 | |
---|
| 2090 | g_debug ("GdmSessionWorker: state SESSION_OPENED"); |
---|
| 2091 | worker->priv->state = GDM_SESSION_WORKER_STATE_SESSION_OPENED; |
---|
| 2092 | |
---|
| 2093 | out: |
---|
| 2094 | if (error_code != PAM_SUCCESS) { |
---|
| 2095 | gdm_session_worker_uninitialize_pam (worker, error_code); |
---|
| 2096 | return FALSE; |
---|
| 2097 | } |
---|
| 2098 | |
---|
| 2099 | gdm_session_auditor_report_login (worker->priv->auditor); |
---|
| 2100 | |
---|
| 2101 | return TRUE; |
---|
| 2102 | } |
---|
| 2103 | |
---|
| 2104 | static void |
---|
| 2105 | gdm_session_worker_set_server_address (GdmSessionWorker *worker, |
---|
| 2106 | const char *address) |
---|
| 2107 | { |
---|
| 2108 | g_free (worker->priv->server_address); |
---|
| 2109 | worker->priv->server_address = g_strdup (address); |
---|
| 2110 | } |
---|
| 2111 | |
---|
| 2112 | static void |
---|
| 2113 | gdm_session_worker_set_property (GObject *object, |
---|
| 2114 | guint prop_id, |
---|
| 2115 | const GValue *value, |
---|
| 2116 | GParamSpec *pspec) |
---|
| 2117 | { |
---|
| 2118 | GdmSessionWorker *self; |
---|
| 2119 | |
---|
| 2120 | self = GDM_SESSION_WORKER (object); |
---|
| 2121 | |
---|
| 2122 | switch (prop_id) { |
---|
| 2123 | case PROP_SERVER_ADDRESS: |
---|
| 2124 | gdm_session_worker_set_server_address (self, g_value_get_string (value)); |
---|
| 2125 | break; |
---|
| 2126 | default: |
---|
| 2127 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
---|
| 2128 | break; |
---|
| 2129 | } |
---|
| 2130 | } |
---|
| 2131 | |
---|
| 2132 | static void |
---|
| 2133 | gdm_session_worker_get_property (GObject *object, |
---|
| 2134 | guint prop_id, |
---|
| 2135 | GValue *value, |
---|
| 2136 | GParamSpec *pspec) |
---|
| 2137 | { |
---|
| 2138 | GdmSessionWorker *self; |
---|
| 2139 | |
---|
| 2140 | self = GDM_SESSION_WORKER (object); |
---|
| 2141 | |
---|
| 2142 | switch (prop_id) { |
---|
| 2143 | case PROP_SERVER_ADDRESS: |
---|
| 2144 | g_value_set_string (value, self->priv->server_address); |
---|
| 2145 | break; |
---|
| 2146 | default: |
---|
| 2147 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
---|
| 2148 | break; |
---|
| 2149 | } |
---|
| 2150 | } |
---|
| 2151 | |
---|
| 2152 | static void |
---|
| 2153 | on_set_environment_variable (GdmSessionWorker *worker, |
---|
| 2154 | DBusMessage *message) |
---|
| 2155 | { |
---|
| 2156 | DBusError error; |
---|
| 2157 | const char *key; |
---|
| 2158 | const char *value; |
---|
| 2159 | dbus_bool_t res; |
---|
| 2160 | |
---|
| 2161 | dbus_error_init (&error); |
---|
| 2162 | res = dbus_message_get_args (message, |
---|
| 2163 | &error, |
---|
| 2164 | DBUS_TYPE_STRING, &key, |
---|
| 2165 | DBUS_TYPE_STRING, &value, |
---|
| 2166 | DBUS_TYPE_INVALID); |
---|
| 2167 | if (res) { |
---|
| 2168 | g_debug ("GdmSessionWorker: set env: %s = %s", key, value); |
---|
| 2169 | gdm_session_worker_set_environment_variable (worker, key, value); |
---|
| 2170 | } else { |
---|
| 2171 | g_warning ("Unable to get arguments: %s", error.message); |
---|
| 2172 | dbus_error_free (&error); |
---|
| 2173 | } |
---|
| 2174 | } |
---|
| 2175 | |
---|
| 2176 | static void |
---|
| 2177 | gdm_session_worker_set_session_name (GdmSessionWorker *worker, |
---|
| 2178 | const char *session_name) |
---|
| 2179 | { |
---|
| 2180 | gdm_session_settings_set_session_name (worker->priv->user_settings, |
---|
| 2181 | session_name); |
---|
| 2182 | } |
---|
| 2183 | |
---|
| 2184 | static void |
---|
| 2185 | on_set_session_name (GdmSessionWorker *worker, |
---|
| 2186 | DBusMessage *message) |
---|
| 2187 | { |
---|
| 2188 | DBusError error; |
---|
| 2189 | const char *session_name; |
---|
| 2190 | dbus_bool_t res; |
---|
| 2191 | |
---|
| 2192 | dbus_error_init (&error); |
---|
| 2193 | res = dbus_message_get_args (message, |
---|
| 2194 | &error, |
---|
| 2195 | DBUS_TYPE_STRING, &session_name, |
---|
| 2196 | DBUS_TYPE_INVALID); |
---|
| 2197 | if (res) { |
---|
| 2198 | g_debug ("GdmSessionWorker: session name set to %s", session_name); |
---|
| 2199 | gdm_session_worker_set_session_name (worker, session_name); |
---|
| 2200 | } else { |
---|
| 2201 | g_warning ("Unable to get arguments: %s", error.message); |
---|
| 2202 | dbus_error_free (&error); |
---|
| 2203 | } |
---|
| 2204 | } |
---|
| 2205 | |
---|
| 2206 | static void |
---|
| 2207 | gdm_session_worker_set_language_name (GdmSessionWorker *worker, |
---|
| 2208 | const char *language_name) |
---|
| 2209 | { |
---|
| 2210 | gdm_session_settings_set_language_name (worker->priv->user_settings, |
---|
| 2211 | language_name); |
---|
| 2212 | } |
---|
| 2213 | |
---|
| 2214 | static void |
---|
| 2215 | gdm_session_worker_set_layout_name (GdmSessionWorker *worker, |
---|
| 2216 | const char *layout_name) |
---|
| 2217 | { |
---|
| 2218 | gdm_session_settings_set_layout_name (worker->priv->user_settings, |
---|
| 2219 | layout_name); |
---|
| 2220 | } |
---|
| 2221 | |
---|
| 2222 | static void |
---|
| 2223 | on_set_language_name (GdmSessionWorker *worker, |
---|
| 2224 | DBusMessage *message) |
---|
| 2225 | { |
---|
| 2226 | DBusError error; |
---|
| 2227 | const char *language_name; |
---|
| 2228 | dbus_bool_t res; |
---|
| 2229 | |
---|
| 2230 | dbus_error_init (&error); |
---|
| 2231 | res = dbus_message_get_args (message, |
---|
| 2232 | &error, |
---|
| 2233 | DBUS_TYPE_STRING, &language_name, |
---|
| 2234 | DBUS_TYPE_INVALID); |
---|
| 2235 | if (res) { |
---|
| 2236 | g_debug ("GdmSessionWorker: language name set to %s", language_name); |
---|
| 2237 | gdm_session_worker_set_language_name (worker, language_name); |
---|
| 2238 | } else { |
---|
| 2239 | g_warning ("Unable to get arguments: %s", error.message); |
---|
| 2240 | dbus_error_free (&error); |
---|
| 2241 | } |
---|
| 2242 | } |
---|
| 2243 | |
---|
| 2244 | static void |
---|
| 2245 | on_set_layout_name (GdmSessionWorker *worker, |
---|
| 2246 | DBusMessage *message) |
---|
| 2247 | { |
---|
| 2248 | DBusError error; |
---|
| 2249 | const char *layout_name; |
---|
| 2250 | dbus_bool_t res; |
---|
| 2251 | |
---|
| 2252 | dbus_error_init (&error); |
---|
| 2253 | res = dbus_message_get_args (message, |
---|
| 2254 | &error, |
---|
| 2255 | DBUS_TYPE_STRING, &layout_name, |
---|
| 2256 | DBUS_TYPE_INVALID); |
---|
| 2257 | if (res) { |
---|
| 2258 | g_debug ("GdmSessionWorker: layout name set to %s", layout_name); |
---|
| 2259 | gdm_session_worker_set_layout_name (worker, layout_name); |
---|
| 2260 | } else { |
---|
| 2261 | g_warning ("Unable to get arguments: %s", error.message); |
---|
| 2262 | dbus_error_free (&error); |
---|
| 2263 | } |
---|
| 2264 | } |
---|
| 2265 | |
---|
| 2266 | static void |
---|
| 2267 | on_saved_language_name_read (GdmSessionWorker *worker) |
---|
| 2268 | { |
---|
| 2269 | char *language_name; |
---|
| 2270 | |
---|
| 2271 | language_name = gdm_session_settings_get_language_name (worker->priv->user_settings); |
---|
| 2272 | send_dbus_string_method (worker->priv->connection, |
---|
| 2273 | "SavedLanguageNameRead", |
---|
| 2274 | language_name); |
---|
| 2275 | g_free (language_name); |
---|
| 2276 | } |
---|
| 2277 | |
---|
| 2278 | static void |
---|
| 2279 | on_saved_layout_name_read (GdmSessionWorker *worker) |
---|
| 2280 | { |
---|
| 2281 | char *layout_name; |
---|
| 2282 | |
---|
| 2283 | layout_name = gdm_session_settings_get_layout_name (worker->priv->user_settings); |
---|
| 2284 | send_dbus_string_method (worker->priv->connection, |
---|
| 2285 | "SavedLayoutNameRead", |
---|
| 2286 | layout_name); |
---|
| 2287 | g_free (layout_name); |
---|
| 2288 | } |
---|
| 2289 | |
---|
| 2290 | static void |
---|
| 2291 | on_saved_session_name_read (GdmSessionWorker *worker) |
---|
| 2292 | { |
---|
| 2293 | char *session_name; |
---|
| 2294 | |
---|
| 2295 | session_name = gdm_session_settings_get_session_name (worker->priv->user_settings); |
---|
| 2296 | send_dbus_string_method (worker->priv->connection, |
---|
| 2297 | "SavedSessionNameRead", |
---|
| 2298 | session_name); |
---|
| 2299 | g_free (session_name); |
---|
| 2300 | } |
---|
| 2301 | |
---|
| 2302 | static void |
---|
| 2303 | do_setup (GdmSessionWorker *worker) |
---|
| 2304 | { |
---|
| 2305 | GError *error; |
---|
| 2306 | gboolean res; |
---|
| 2307 | |
---|
| 2308 | worker->priv->user_settings = gdm_session_settings_new (); |
---|
| 2309 | |
---|
| 2310 | g_signal_connect_swapped (worker->priv->user_settings, |
---|
| 2311 | "notify::language-name", |
---|
| 2312 | G_CALLBACK (on_saved_language_name_read), |
---|
| 2313 | worker); |
---|
| 2314 | |
---|
| 2315 | g_signal_connect_swapped (worker->priv->user_settings, |
---|
| 2316 | "notify::layout-name", |
---|
| 2317 | G_CALLBACK (on_saved_layout_name_read), |
---|
| 2318 | worker); |
---|
| 2319 | |
---|
| 2320 | g_signal_connect_swapped (worker->priv->user_settings, |
---|
| 2321 | "notify::session-name", |
---|
| 2322 | G_CALLBACK (on_saved_session_name_read), |
---|
| 2323 | worker); |
---|
| 2324 | |
---|
| 2325 | /* In some setups the user can read ~/.dmrc at this point. |
---|
| 2326 | * In some other setups the user can only read ~/.dmrc after completing |
---|
| 2327 | * the pam conversation. |
---|
| 2328 | * |
---|
| 2329 | * The user experience is better if we can read .dmrc now since we can |
---|
| 2330 | * prefill in the language and session combo boxes in the greeter with |
---|
| 2331 | * the right values. |
---|
| 2332 | * |
---|
| 2333 | * We'll try now, and if it doesn't work out, try later. |
---|
| 2334 | */ |
---|
| 2335 | if (worker->priv->username != NULL) { |
---|
| 2336 | attempt_to_load_user_settings (worker, |
---|
| 2337 | worker->priv->username); |
---|
| 2338 | } |
---|
| 2339 | |
---|
| 2340 | error = NULL; |
---|
| 2341 | res = gdm_session_worker_initialize_pam (worker, |
---|
| 2342 | worker->priv->service, |
---|
| 2343 | worker->priv->username, |
---|
| 2344 | worker->priv->hostname, |
---|
| 2345 | worker->priv->x11_display_name, |
---|
| 2346 | worker->priv->x11_authority_file, |
---|
| 2347 | worker->priv->display_device, |
---|
| 2348 | &error); |
---|
| 2349 | if (! res) { |
---|
| 2350 | send_dbus_string_method (worker->priv->connection, |
---|
| 2351 | "SetupFailed", |
---|
| 2352 | error->message); |
---|
| 2353 | g_error_free (error); |
---|
| 2354 | return; |
---|
| 2355 | } |
---|
| 2356 | |
---|
| 2357 | send_dbus_void_method (worker->priv->connection, "SetupComplete"); |
---|
| 2358 | } |
---|
| 2359 | |
---|
| 2360 | static void |
---|
| 2361 | do_authenticate (GdmSessionWorker *worker) |
---|
| 2362 | { |
---|
| 2363 | GError *error; |
---|
| 2364 | gboolean res; |
---|
| 2365 | |
---|
| 2366 | /* find out who the user is and ensure they are who they say they are |
---|
| 2367 | */ |
---|
| 2368 | error = NULL; |
---|
| 2369 | res = gdm_session_worker_authenticate_user (worker, |
---|
| 2370 | worker->priv->password_is_required, |
---|
| 2371 | &error); |
---|
| 2372 | if (! res) { |
---|
| 2373 | g_debug ("GdmSessionWorker: Unable to verify user"); |
---|
| 2374 | send_dbus_string_method (worker->priv->connection, |
---|
| 2375 | "AuthenticationFailed", |
---|
| 2376 | error->message); |
---|
| 2377 | g_error_free (error); |
---|
| 2378 | return; |
---|
| 2379 | } |
---|
| 2380 | |
---|
| 2381 | /* we're authenticated. Let's make sure we've been given |
---|
| 2382 | * a valid username for the system |
---|
| 2383 | */ |
---|
| 2384 | g_debug ("GdmSessionWorker: trying to get updated username"); |
---|
| 2385 | gdm_session_worker_update_username (worker); |
---|
| 2386 | |
---|
| 2387 | send_dbus_void_method (worker->priv->connection, "Authenticated"); |
---|
| 2388 | } |
---|
| 2389 | |
---|
| 2390 | static void |
---|
| 2391 | do_authorize (GdmSessionWorker *worker) |
---|
| 2392 | { |
---|
| 2393 | GError *error; |
---|
| 2394 | gboolean res; |
---|
| 2395 | |
---|
| 2396 | /* make sure the user is allowed to log in to this system |
---|
| 2397 | */ |
---|
| 2398 | error = NULL; |
---|
| 2399 | res = gdm_session_worker_authorize_user (worker, |
---|
| 2400 | worker->priv->password_is_required, |
---|
| 2401 | &error); |
---|
| 2402 | if (! res) { |
---|
| 2403 | send_dbus_string_method (worker->priv->connection, |
---|
| 2404 | "AuthorizationFailed", |
---|
| 2405 | error->message); |
---|
| 2406 | g_error_free (error); |
---|
| 2407 | return; |
---|
| 2408 | } |
---|
| 2409 | |
---|
| 2410 | send_dbus_void_method (worker->priv->connection, "Authorized"); |
---|
| 2411 | } |
---|
| 2412 | |
---|
| 2413 | static void |
---|
| 2414 | do_accredit (GdmSessionWorker *worker) |
---|
| 2415 | { |
---|
| 2416 | GError *error; |
---|
| 2417 | gboolean res; |
---|
| 2418 | |
---|
| 2419 | /* get kerberos tickets, setup group lists, etc |
---|
| 2420 | */ |
---|
| 2421 | error = NULL; |
---|
| 2422 | res = gdm_session_worker_accredit_user (worker, &error); |
---|
| 2423 | |
---|
| 2424 | if (! res) { |
---|
| 2425 | send_dbus_string_method (worker->priv->connection, |
---|
| 2426 | "AccreditationFailed", |
---|
| 2427 | error->message); |
---|
| 2428 | g_error_free (error); |
---|
| 2429 | return; |
---|
| 2430 | } |
---|
| 2431 | |
---|
| 2432 | send_dbus_void_method (worker->priv->connection, "Accredited"); |
---|
| 2433 | } |
---|
| 2434 | |
---|
| 2435 | static void |
---|
| 2436 | do_open_session (GdmSessionWorker *worker) |
---|
| 2437 | { |
---|
| 2438 | GError *error; |
---|
| 2439 | gboolean res; |
---|
| 2440 | |
---|
| 2441 | error = NULL; |
---|
| 2442 | res = gdm_session_worker_open_user_session (worker, &error); |
---|
| 2443 | if (! res) { |
---|
| 2444 | send_dbus_string_method (worker->priv->connection, |
---|
| 2445 | "StartFailed", |
---|
| 2446 | error->message); |
---|
| 2447 | g_error_free (error); |
---|
| 2448 | return; |
---|
| 2449 | } |
---|
| 2450 | |
---|
| 2451 | queue_state_change (worker); |
---|
| 2452 | } |
---|
| 2453 | |
---|
| 2454 | static void |
---|
| 2455 | do_start_session (GdmSessionWorker *worker) |
---|
| 2456 | { |
---|
| 2457 | GError *error; |
---|
| 2458 | gboolean res; |
---|
| 2459 | |
---|
| 2460 | error = NULL; |
---|
| 2461 | res = gdm_session_worker_start_user_session (worker, &error); |
---|
| 2462 | if (! res) { |
---|
| 2463 | send_dbus_string_method (worker->priv->connection, |
---|
| 2464 | "StartFailed", |
---|
| 2465 | error->message); |
---|
| 2466 | g_error_free (error); |
---|
| 2467 | return; |
---|
| 2468 | } |
---|
| 2469 | |
---|
| 2470 | send_dbus_int_method (worker->priv->connection, |
---|
| 2471 | "SessionStarted", |
---|
| 2472 | (int)worker->priv->child_pid); |
---|
| 2473 | } |
---|
| 2474 | |
---|
| 2475 | static const char * |
---|
| 2476 | get_state_name (int state) |
---|
| 2477 | { |
---|
| 2478 | const char *name; |
---|
| 2479 | |
---|
| 2480 | name = NULL; |
---|
| 2481 | |
---|
| 2482 | switch (state) { |
---|
| 2483 | case GDM_SESSION_WORKER_STATE_NONE: |
---|
| 2484 | name = "NONE"; |
---|
| 2485 | break; |
---|
| 2486 | case GDM_SESSION_WORKER_STATE_SETUP_COMPLETE: |
---|
| 2487 | name = "SETUP_COMPLETE"; |
---|
| 2488 | break; |
---|
| 2489 | case GDM_SESSION_WORKER_STATE_AUTHENTICATED: |
---|
| 2490 | name = "AUTHENTICATED"; |
---|
| 2491 | break; |
---|
| 2492 | case GDM_SESSION_WORKER_STATE_AUTHORIZED: |
---|
| 2493 | name = "AUTHORIZED"; |
---|
| 2494 | break; |
---|
| 2495 | case GDM_SESSION_WORKER_STATE_ACCREDITED: |
---|
| 2496 | name = "ACCREDITED"; |
---|
| 2497 | break; |
---|
| 2498 | case GDM_SESSION_WORKER_STATE_SESSION_OPENED: |
---|
| 2499 | name = "SESSION_OPENED"; |
---|
| 2500 | break; |
---|
| 2501 | case GDM_SESSION_WORKER_STATE_SESSION_STARTED: |
---|
| 2502 | name = "SESSION_STARTED"; |
---|
| 2503 | break; |
---|
| 2504 | default: |
---|
| 2505 | g_assert_not_reached (); |
---|
| 2506 | break; |
---|
| 2507 | } |
---|
| 2508 | |
---|
| 2509 | return name; |
---|
| 2510 | } |
---|
| 2511 | |
---|
| 2512 | static gboolean |
---|
| 2513 | state_change_idle (GdmSessionWorker *worker) |
---|
| 2514 | { |
---|
| 2515 | int new_state; |
---|
| 2516 | |
---|
| 2517 | new_state = worker->priv->state + 1; |
---|
| 2518 | g_debug ("GdmSessionWorker: attempting to change state to %s", |
---|
| 2519 | get_state_name (new_state)); |
---|
| 2520 | |
---|
| 2521 | worker->priv->state_change_idle_id = 0; |
---|
| 2522 | |
---|
| 2523 | switch (new_state) { |
---|
| 2524 | case GDM_SESSION_WORKER_STATE_SETUP_COMPLETE: |
---|
| 2525 | do_setup (worker); |
---|
| 2526 | break; |
---|
| 2527 | case GDM_SESSION_WORKER_STATE_AUTHENTICATED: |
---|
| 2528 | do_authenticate (worker); |
---|
| 2529 | break; |
---|
| 2530 | case GDM_SESSION_WORKER_STATE_AUTHORIZED: |
---|
| 2531 | do_authorize (worker); |
---|
| 2532 | break; |
---|
| 2533 | case GDM_SESSION_WORKER_STATE_ACCREDITED: |
---|
| 2534 | do_accredit (worker); |
---|
| 2535 | break; |
---|
| 2536 | case GDM_SESSION_WORKER_STATE_SESSION_OPENED: |
---|
| 2537 | do_open_session (worker); |
---|
| 2538 | break; |
---|
| 2539 | case GDM_SESSION_WORKER_STATE_SESSION_STARTED: |
---|
| 2540 | do_start_session (worker); |
---|
| 2541 | break; |
---|
| 2542 | case GDM_SESSION_WORKER_STATE_NONE: |
---|
| 2543 | default: |
---|
| 2544 | g_assert_not_reached (); |
---|
| 2545 | } |
---|
| 2546 | return FALSE; |
---|
| 2547 | } |
---|
| 2548 | |
---|
| 2549 | static void |
---|
| 2550 | queue_state_change (GdmSessionWorker *worker) |
---|
| 2551 | { |
---|
| 2552 | if (worker->priv->state_change_idle_id > 0) { |
---|
| 2553 | return; |
---|
| 2554 | } |
---|
| 2555 | |
---|
| 2556 | worker->priv->state_change_idle_id = g_idle_add ((GSourceFunc)state_change_idle, worker); |
---|
| 2557 | } |
---|
| 2558 | |
---|
| 2559 | static void |
---|
| 2560 | on_start_program (GdmSessionWorker *worker, |
---|
| 2561 | DBusMessage *message) |
---|
| 2562 | { |
---|
| 2563 | DBusError error; |
---|
| 2564 | const char *text; |
---|
| 2565 | dbus_bool_t res; |
---|
| 2566 | |
---|
| 2567 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_ACCREDITED) { |
---|
| 2568 | g_debug ("GdmSessionWorker: ignoring spurious start program while in state %s", get_state_name (worker->priv->state)); |
---|
| 2569 | return; |
---|
| 2570 | } |
---|
| 2571 | |
---|
| 2572 | dbus_error_init (&error); |
---|
| 2573 | res = dbus_message_get_args (message, |
---|
| 2574 | &error, |
---|
| 2575 | DBUS_TYPE_STRING, &text, |
---|
| 2576 | DBUS_TYPE_INVALID); |
---|
| 2577 | if (res) { |
---|
| 2578 | GError *parse_error; |
---|
| 2579 | |
---|
| 2580 | g_debug ("GdmSessionWorker: start program: %s", text); |
---|
| 2581 | |
---|
| 2582 | if (worker->priv->arguments != NULL) { |
---|
| 2583 | g_strfreev (worker->priv->arguments); |
---|
| 2584 | worker->priv->arguments = NULL; |
---|
| 2585 | } |
---|
| 2586 | |
---|
| 2587 | parse_error = NULL; |
---|
| 2588 | if (! g_shell_parse_argv (text, NULL, &worker->priv->arguments, &parse_error)) { |
---|
| 2589 | g_warning ("Unable to parse command: %s", parse_error->message); |
---|
| 2590 | g_error_free (parse_error); |
---|
| 2591 | return; |
---|
| 2592 | } |
---|
| 2593 | |
---|
| 2594 | queue_state_change (worker); |
---|
| 2595 | } else { |
---|
| 2596 | g_warning ("Unable to get arguments: %s", error.message); |
---|
| 2597 | dbus_error_free (&error); |
---|
| 2598 | } |
---|
| 2599 | } |
---|
| 2600 | |
---|
| 2601 | static void |
---|
| 2602 | on_setup (GdmSessionWorker *worker, |
---|
| 2603 | DBusMessage *message) |
---|
| 2604 | { |
---|
| 2605 | DBusError error; |
---|
| 2606 | const char *service; |
---|
| 2607 | const char *x11_display_name; |
---|
| 2608 | const char *x11_authority_file; |
---|
| 2609 | const char *console; |
---|
| 2610 | const char *hostname; |
---|
| 2611 | dbus_bool_t res; |
---|
| 2612 | |
---|
| 2613 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_NONE) { |
---|
| 2614 | g_debug ("GdmSessionWorker: ignoring spurious setup while in state %s", get_state_name (worker->priv->state)); |
---|
| 2615 | return; |
---|
| 2616 | } |
---|
| 2617 | |
---|
| 2618 | dbus_error_init (&error); |
---|
| 2619 | res = dbus_message_get_args (message, |
---|
| 2620 | &error, |
---|
| 2621 | DBUS_TYPE_STRING, &service, |
---|
| 2622 | DBUS_TYPE_STRING, &x11_display_name, |
---|
| 2623 | DBUS_TYPE_STRING, &console, |
---|
| 2624 | DBUS_TYPE_STRING, &hostname, |
---|
| 2625 | DBUS_TYPE_STRING, &x11_authority_file, |
---|
| 2626 | DBUS_TYPE_INVALID); |
---|
| 2627 | if (res) { |
---|
| 2628 | worker->priv->service = g_strdup (service); |
---|
| 2629 | worker->priv->x11_display_name = g_strdup (x11_display_name); |
---|
| 2630 | worker->priv->x11_authority_file = g_strdup (x11_authority_file); |
---|
| 2631 | worker->priv->display_device = g_strdup (console); |
---|
| 2632 | worker->priv->hostname = g_strdup (hostname); |
---|
| 2633 | worker->priv->username = NULL; |
---|
| 2634 | |
---|
| 2635 | g_debug ("GdmSessionWorker: queuing setup: %s %s", service, console); |
---|
| 2636 | queue_state_change (worker); |
---|
| 2637 | } else { |
---|
| 2638 | g_warning ("Unable to get arguments: %s", error.message); |
---|
| 2639 | dbus_error_free (&error); |
---|
| 2640 | } |
---|
| 2641 | } |
---|
| 2642 | |
---|
| 2643 | static void |
---|
| 2644 | on_setup_for_user (GdmSessionWorker *worker, |
---|
| 2645 | DBusMessage *message) |
---|
| 2646 | { |
---|
| 2647 | DBusError error; |
---|
| 2648 | const char *service; |
---|
| 2649 | const char *x11_display_name; |
---|
| 2650 | const char *x11_authority_file; |
---|
| 2651 | const char *console; |
---|
| 2652 | const char *hostname; |
---|
| 2653 | const char *username; |
---|
| 2654 | dbus_bool_t res; |
---|
| 2655 | |
---|
| 2656 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_NONE) { |
---|
| 2657 | g_debug ("GdmSessionWorker: ignoring spurious setup for user while in state %s", get_state_name (worker->priv->state)); |
---|
| 2658 | return; |
---|
| 2659 | } |
---|
| 2660 | |
---|
| 2661 | dbus_error_init (&error); |
---|
| 2662 | res = dbus_message_get_args (message, |
---|
| 2663 | &error, |
---|
| 2664 | DBUS_TYPE_STRING, &service, |
---|
| 2665 | DBUS_TYPE_STRING, &x11_display_name, |
---|
| 2666 | DBUS_TYPE_STRING, &console, |
---|
| 2667 | DBUS_TYPE_STRING, &hostname, |
---|
| 2668 | DBUS_TYPE_STRING, &x11_authority_file, |
---|
| 2669 | DBUS_TYPE_STRING, &username, |
---|
| 2670 | DBUS_TYPE_INVALID); |
---|
| 2671 | if (res) { |
---|
| 2672 | worker->priv->service = g_strdup (service); |
---|
| 2673 | worker->priv->x11_display_name = g_strdup (x11_display_name); |
---|
| 2674 | worker->priv->x11_authority_file = g_strdup (x11_authority_file); |
---|
| 2675 | worker->priv->display_device = g_strdup (console); |
---|
| 2676 | worker->priv->hostname = g_strdup (hostname); |
---|
| 2677 | worker->priv->username = g_strdup (username); |
---|
| 2678 | |
---|
| 2679 | g_debug ("GdmSessionWorker: queuing setup for user: %s %s", service, console); |
---|
| 2680 | queue_state_change (worker); |
---|
| 2681 | } else { |
---|
| 2682 | g_warning ("Unable to get arguments: %s", error.message); |
---|
| 2683 | dbus_error_free (&error); |
---|
| 2684 | } |
---|
| 2685 | } |
---|
| 2686 | |
---|
| 2687 | static void |
---|
| 2688 | on_authenticate (GdmSessionWorker *worker, |
---|
| 2689 | DBusMessage *message) |
---|
| 2690 | { |
---|
| 2691 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_SETUP_COMPLETE) { |
---|
| 2692 | g_debug ("GdmSessionWorker: ignoring spurious authenticate for user while in state %s", get_state_name (worker->priv->state)); |
---|
| 2693 | return; |
---|
| 2694 | } |
---|
| 2695 | |
---|
| 2696 | queue_state_change (worker); |
---|
| 2697 | } |
---|
| 2698 | |
---|
| 2699 | static void |
---|
| 2700 | on_authorize (GdmSessionWorker *worker, |
---|
| 2701 | DBusMessage *message) |
---|
| 2702 | { |
---|
| 2703 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_AUTHENTICATED) { |
---|
| 2704 | g_debug ("GdmSessionWorker: ignoring spurious authorize for user while in state %s", get_state_name (worker->priv->state)); |
---|
| 2705 | return; |
---|
| 2706 | } |
---|
| 2707 | |
---|
| 2708 | queue_state_change (worker); |
---|
| 2709 | } |
---|
| 2710 | |
---|
| 2711 | static void |
---|
| 2712 | on_establish_credentials (GdmSessionWorker *worker, |
---|
| 2713 | DBusMessage *message) |
---|
| 2714 | { |
---|
| 2715 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_AUTHORIZED) { |
---|
| 2716 | g_debug ("GdmSessionWorker: ignoring spurious establish credentials for user while in state %s", get_state_name (worker->priv->state)); |
---|
| 2717 | return; |
---|
| 2718 | } |
---|
| 2719 | |
---|
| 2720 | worker->priv->cred_flags = PAM_ESTABLISH_CRED; |
---|
| 2721 | |
---|
| 2722 | queue_state_change (worker); |
---|
| 2723 | } |
---|
| 2724 | |
---|
| 2725 | static void |
---|
| 2726 | on_reauthenticate (GdmSessionWorker *worker, |
---|
| 2727 | DBusMessage *message) |
---|
| 2728 | { |
---|
| 2729 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_SESSION_STARTED) { |
---|
| 2730 | g_debug ("GdmSessionWorker: ignoring spurious reauthenticate for user while in state %s", get_state_name (worker->priv->state)); |
---|
| 2731 | return; |
---|
| 2732 | } |
---|
| 2733 | |
---|
| 2734 | queue_state_change (worker); |
---|
| 2735 | } |
---|
| 2736 | |
---|
| 2737 | static void |
---|
| 2738 | on_reauthorize (GdmSessionWorker *worker, |
---|
| 2739 | DBusMessage *message) |
---|
| 2740 | { |
---|
| 2741 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_REAUTHENTICATED) { |
---|
| 2742 | g_debug ("GdmSessionWorker: ignoring spurious reauthorize for user while in state %s", get_state_name (worker->priv->state)); |
---|
| 2743 | return; |
---|
| 2744 | } |
---|
| 2745 | |
---|
| 2746 | queue_state_change (worker); |
---|
| 2747 | } |
---|
| 2748 | |
---|
| 2749 | static void |
---|
| 2750 | on_refresh_credentials (GdmSessionWorker *worker, |
---|
| 2751 | DBusMessage *message) |
---|
| 2752 | { |
---|
| 2753 | int error_code; |
---|
| 2754 | |
---|
| 2755 | if (worker->priv->state != GDM_SESSION_WORKER_STATE_REAUTHORIZED) { |
---|
| 2756 | g_debug ("GdmSessionWorker: ignoring spurious refreshing credentials for user while in state %s", get_state_name (worker->priv->state)); |
---|
| 2757 | return; |
---|
| 2758 | } |
---|
| 2759 | |
---|
| 2760 | g_debug ("GdmSessionWorker: refreshing credentials"); |
---|
| 2761 | |
---|
| 2762 | error_code = pam_setcred (worker->priv->pam_handle, PAM_REFRESH_CRED); |
---|
| 2763 | if (error_code != PAM_SUCCESS) { |
---|
| 2764 | g_debug ("GdmSessionWorker: %s", pam_strerror (worker->priv->pam_handle, error_code)); |
---|
| 2765 | } |
---|
| 2766 | } |
---|
| 2767 | |
---|
| 2768 | static DBusHandlerResult |
---|
| 2769 | worker_dbus_handle_message (DBusConnection *connection, |
---|
| 2770 | DBusMessage *message, |
---|
| 2771 | void *user_data, |
---|
| 2772 | dbus_bool_t local_interface) |
---|
| 2773 | { |
---|
| 2774 | GdmSessionWorker *worker = GDM_SESSION_WORKER (user_data); |
---|
| 2775 | |
---|
| 2776 | #if 0 |
---|
| 2777 | g_message ("obj_path=%s interface=%s method=%s destination=%s", |
---|
| 2778 | dbus_message_get_path (message), |
---|
| 2779 | dbus_message_get_interface (message), |
---|
| 2780 | dbus_message_get_member (message), |
---|
| 2781 | dbus_message_get_destination (message)); |
---|
| 2782 | #endif |
---|
| 2783 | |
---|
| 2784 | g_return_val_if_fail (connection != NULL, DBUS_HANDLER_RESULT_NOT_YET_HANDLED); |
---|
| 2785 | g_return_val_if_fail (message != NULL, DBUS_HANDLER_RESULT_NOT_YET_HANDLED); |
---|
| 2786 | |
---|
| 2787 | if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "Setup")) { |
---|
| 2788 | on_setup (worker, message); |
---|
| 2789 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "SetupForUser")) { |
---|
| 2790 | on_setup_for_user (worker, message); |
---|
| 2791 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "Authenticate")) { |
---|
| 2792 | on_authenticate (worker, message); |
---|
| 2793 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "Authorize")) { |
---|
| 2794 | on_authorize (worker, message); |
---|
| 2795 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "EstablishCredentials")) { |
---|
| 2796 | on_establish_credentials (worker, message); |
---|
| 2797 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "StartProgram")) { |
---|
| 2798 | on_start_program (worker, message); |
---|
| 2799 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "Reauthenticate")) { |
---|
| 2800 | on_reauthenticate (worker, message); |
---|
| 2801 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "Reauthorize")) { |
---|
| 2802 | on_reauthorize (worker, message); |
---|
| 2803 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "RefreshCredentials")) { |
---|
| 2804 | on_refresh_credentials (worker, message); |
---|
| 2805 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "SetEnvironmentVariable")) { |
---|
| 2806 | on_set_environment_variable (worker, message); |
---|
| 2807 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "SetLanguageName")) { |
---|
| 2808 | on_set_language_name (worker, message); |
---|
| 2809 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "SetLayoutName")) { |
---|
| 2810 | on_set_layout_name (worker, message); |
---|
| 2811 | } else if (dbus_message_is_signal (message, GDM_SESSION_DBUS_INTERFACE, "SetSessionName")) { |
---|
| 2812 | on_set_session_name (worker, message); |
---|
| 2813 | } else { |
---|
| 2814 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
---|
| 2815 | } |
---|
| 2816 | |
---|
| 2817 | return DBUS_HANDLER_RESULT_HANDLED; |
---|
| 2818 | } |
---|
| 2819 | |
---|
| 2820 | static DBusHandlerResult |
---|
| 2821 | worker_dbus_filter_function (DBusConnection *connection, |
---|
| 2822 | DBusMessage *message, |
---|
| 2823 | void *user_data) |
---|
| 2824 | { |
---|
| 2825 | GdmSessionWorker *worker = GDM_SESSION_WORKER (user_data); |
---|
| 2826 | const char *path; |
---|
| 2827 | |
---|
| 2828 | path = dbus_message_get_path (message); |
---|
| 2829 | |
---|
| 2830 | g_debug ("GdmSessionWorker: obj_path=%s interface=%s method=%s", |
---|
| 2831 | dbus_message_get_path (message), |
---|
| 2832 | dbus_message_get_interface (message), |
---|
| 2833 | dbus_message_get_member (message)); |
---|
| 2834 | |
---|
| 2835 | if (dbus_message_is_signal (message, DBUS_INTERFACE_LOCAL, "Disconnected") |
---|
| 2836 | && strcmp (path, DBUS_PATH_LOCAL) == 0) { |
---|
| 2837 | |
---|
| 2838 | g_debug ("GdmSessionWorker: Got disconnected from the server"); |
---|
| 2839 | |
---|
| 2840 | dbus_connection_unref (connection); |
---|
| 2841 | worker->priv->connection = NULL; |
---|
| 2842 | |
---|
| 2843 | } else if (dbus_message_is_signal (message, |
---|
| 2844 | DBUS_INTERFACE_DBUS, |
---|
| 2845 | "NameOwnerChanged")) { |
---|
| 2846 | g_debug ("GdmSessionWorker: Name owner changed?"); |
---|
| 2847 | } else { |
---|
| 2848 | return worker_dbus_handle_message (connection, message, user_data, FALSE); |
---|
| 2849 | } |
---|
| 2850 | |
---|
| 2851 | return DBUS_HANDLER_RESULT_HANDLED; |
---|
| 2852 | } |
---|
| 2853 | |
---|
| 2854 | static GObject * |
---|
| 2855 | gdm_session_worker_constructor (GType type, |
---|
| 2856 | guint n_construct_properties, |
---|
| 2857 | GObjectConstructParam *construct_properties) |
---|
| 2858 | { |
---|
| 2859 | GdmSessionWorker *worker; |
---|
| 2860 | DBusError error; |
---|
| 2861 | |
---|
| 2862 | worker = GDM_SESSION_WORKER (G_OBJECT_CLASS (gdm_session_worker_parent_class)->constructor (type, |
---|
| 2863 | n_construct_properties, |
---|
| 2864 | construct_properties)); |
---|
| 2865 | |
---|
| 2866 | g_debug ("GdmSessionWorker: connecting to address: %s", worker->priv->server_address); |
---|
| 2867 | |
---|
| 2868 | dbus_error_init (&error); |
---|
| 2869 | worker->priv->connection = dbus_connection_open (worker->priv->server_address, &error); |
---|
| 2870 | if (worker->priv->connection == NULL) { |
---|
| 2871 | if (dbus_error_is_set (&error)) { |
---|
| 2872 | g_warning ("error opening connection: %s", error.message); |
---|
| 2873 | dbus_error_free (&error); |
---|
| 2874 | } else { |
---|
| 2875 | g_warning ("Unable to open connection"); |
---|
| 2876 | } |
---|
| 2877 | exit (1); |
---|
| 2878 | } |
---|
| 2879 | |
---|
| 2880 | dbus_connection_setup_with_g_main (worker->priv->connection, NULL); |
---|
| 2881 | dbus_connection_set_exit_on_disconnect (worker->priv->connection, TRUE); |
---|
| 2882 | |
---|
| 2883 | dbus_connection_add_filter (worker->priv->connection, |
---|
| 2884 | worker_dbus_filter_function, |
---|
| 2885 | worker, |
---|
| 2886 | NULL); |
---|
| 2887 | |
---|
| 2888 | return G_OBJECT (worker); |
---|
| 2889 | } |
---|
| 2890 | |
---|
| 2891 | static void |
---|
| 2892 | gdm_session_worker_class_init (GdmSessionWorkerClass *klass) |
---|
| 2893 | { |
---|
| 2894 | GObjectClass *object_class = G_OBJECT_CLASS (klass); |
---|
| 2895 | |
---|
| 2896 | object_class->get_property = gdm_session_worker_get_property; |
---|
| 2897 | object_class->set_property = gdm_session_worker_set_property; |
---|
| 2898 | object_class->constructor = gdm_session_worker_constructor; |
---|
| 2899 | object_class->finalize = gdm_session_worker_finalize; |
---|
| 2900 | |
---|
| 2901 | g_type_class_add_private (klass, sizeof (GdmSessionWorkerPrivate)); |
---|
| 2902 | |
---|
| 2903 | g_object_class_install_property (object_class, |
---|
| 2904 | PROP_SERVER_ADDRESS, |
---|
| 2905 | g_param_spec_string ("server-address", |
---|
| 2906 | "server address", |
---|
| 2907 | "server address", |
---|
| 2908 | NULL, |
---|
| 2909 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 2910 | } |
---|
| 2911 | |
---|
| 2912 | static void |
---|
| 2913 | gdm_session_worker_init (GdmSessionWorker *worker) |
---|
| 2914 | { |
---|
| 2915 | |
---|
| 2916 | worker->priv = GDM_SESSION_WORKER_GET_PRIVATE (worker); |
---|
| 2917 | worker->priv->environment = g_hash_table_new_full (g_str_hash, |
---|
| 2918 | g_str_equal, |
---|
| 2919 | (GDestroyNotify) g_free, |
---|
| 2920 | (GDestroyNotify) g_free); |
---|
| 2921 | } |
---|
| 2922 | |
---|
| 2923 | static void |
---|
| 2924 | gdm_session_worker_unwatch_child (GdmSessionWorker *worker) |
---|
| 2925 | { |
---|
| 2926 | if (worker->priv->child_watch_id == 0) |
---|
| 2927 | return; |
---|
| 2928 | |
---|
| 2929 | g_source_remove (worker->priv->child_watch_id); |
---|
| 2930 | worker->priv->child_watch_id = 0; |
---|
| 2931 | } |
---|
| 2932 | |
---|
| 2933 | |
---|
| 2934 | static void |
---|
| 2935 | gdm_session_worker_finalize (GObject *object) |
---|
| 2936 | { |
---|
| 2937 | GdmSessionWorker *worker; |
---|
| 2938 | |
---|
| 2939 | g_return_if_fail (object != NULL); |
---|
| 2940 | g_return_if_fail (GDM_IS_SESSION_WORKER (object)); |
---|
| 2941 | |
---|
| 2942 | worker = GDM_SESSION_WORKER (object); |
---|
| 2943 | |
---|
| 2944 | g_return_if_fail (worker->priv != NULL); |
---|
| 2945 | |
---|
| 2946 | gdm_session_worker_unwatch_child (worker); |
---|
| 2947 | |
---|
| 2948 | if (worker->priv->username != NULL) { |
---|
| 2949 | g_free (worker->priv->username); |
---|
| 2950 | worker->priv->username = NULL; |
---|
| 2951 | } |
---|
| 2952 | |
---|
| 2953 | if (worker->priv->arguments != NULL) { |
---|
| 2954 | g_strfreev (worker->priv->arguments); |
---|
| 2955 | worker->priv->arguments = NULL; |
---|
| 2956 | } |
---|
| 2957 | |
---|
| 2958 | if (worker->priv->environment != NULL) { |
---|
| 2959 | g_hash_table_destroy (worker->priv->environment); |
---|
| 2960 | worker->priv->environment = NULL; |
---|
| 2961 | } |
---|
| 2962 | |
---|
| 2963 | G_OBJECT_CLASS (gdm_session_worker_parent_class)->finalize (object); |
---|
| 2964 | } |
---|
| 2965 | |
---|
| 2966 | GdmSessionWorker * |
---|
| 2967 | gdm_session_worker_new (const char *address) |
---|
| 2968 | { |
---|
| 2969 | GObject *object; |
---|
| 2970 | |
---|
| 2971 | object = g_object_new (GDM_TYPE_SESSION_WORKER, |
---|
| 2972 | "server-address", address, |
---|
| 2973 | NULL); |
---|
| 2974 | |
---|
| 2975 | return GDM_SESSION_WORKER (object); |
---|
| 2976 | } |
---|
| 2977 | |
---|