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) 2007 William Jon McCann <mccann@jhu.edu> |
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4 | * |
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5 | * This program is free software; you can redistribute it and/or modify |
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6 | * it under the terms of the GNU General Public License as published by |
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7 | * the Free Software Foundation; either version 2 of the License, or |
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8 | * (at your option) any later version. |
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9 | * |
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10 | * This program is distributed in the hope that it will be useful, |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | * GNU General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU General Public License |
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16 | * along with this program; if not, write to the Free Software |
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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18 | * |
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19 | */ |
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20 | |
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21 | #include "config.h" |
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22 | |
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23 | #include <stdlib.h> |
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24 | #include <stdio.h> |
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25 | #include <unistd.h> |
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26 | #include <string.h> |
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27 | |
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28 | #include <glib.h> |
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29 | #include <glib/gi18n.h> |
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30 | #include <glib-object.h> |
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31 | #define DBUS_API_SUBJECT_TO_CHANGE |
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32 | #include <dbus/dbus.h> |
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33 | #include <dbus/dbus-glib.h> |
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34 | #include <dbus/dbus-glib-lowlevel.h> |
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35 | |
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36 | #include "gdm-chooser-client.h" |
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37 | |
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38 | #define GDM_CHOOSER_CLIENT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_CHOOSER_CLIENT, GdmChooserClientPrivate)) |
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39 | |
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40 | #define CHOOSER_SERVER_DBUS_PATH "/org/gnome/DisplayManager/ChooserServer" |
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41 | #define CHOOSER_SERVER_DBUS_INTERFACE "org.gnome.DisplayManager.ChooserServer" |
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42 | |
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43 | #define GDM_DBUS_NAME "org.gnome.DisplayManager" |
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44 | #define GDM_DBUS_DISPLAY_INTERFACE "org.gnome.DisplayManager.Display" |
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45 | |
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46 | struct GdmChooserClientPrivate |
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47 | { |
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48 | DBusConnection *connection; |
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49 | char *address; |
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50 | }; |
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51 | |
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52 | enum { |
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53 | PROP_0, |
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54 | }; |
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55 | |
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56 | static void gdm_chooser_client_class_init (GdmChooserClientClass *klass); |
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57 | static void gdm_chooser_client_init (GdmChooserClient *chooser_client); |
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58 | static void gdm_chooser_client_finalize (GObject *object); |
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59 | |
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60 | G_DEFINE_TYPE (GdmChooserClient, gdm_chooser_client, G_TYPE_OBJECT) |
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61 | |
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62 | static gpointer client_object = NULL; |
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63 | |
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64 | GQuark |
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65 | gdm_chooser_client_error_quark (void) |
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66 | { |
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67 | static GQuark error_quark = 0; |
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68 | |
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69 | if (error_quark == 0) |
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70 | error_quark = g_quark_from_static_string ("gdm-chooser-client"); |
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71 | |
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72 | return error_quark; |
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73 | } |
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74 | |
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75 | static gboolean |
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76 | send_dbus_string_method (DBusConnection *connection, |
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77 | const char *method, |
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78 | const char *payload) |
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79 | { |
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80 | DBusError error; |
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81 | DBusMessage *message; |
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82 | DBusMessage *reply; |
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83 | DBusMessageIter iter; |
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84 | const char *str; |
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85 | |
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86 | if (payload != NULL) { |
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87 | str = payload; |
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88 | } else { |
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89 | str = ""; |
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90 | } |
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91 | |
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92 | g_debug ("GdmChooserClient: Calling %s", method); |
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93 | message = dbus_message_new_method_call (NULL, |
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94 | CHOOSER_SERVER_DBUS_PATH, |
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95 | CHOOSER_SERVER_DBUS_INTERFACE, |
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96 | method); |
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97 | if (message == NULL) { |
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98 | g_warning ("Couldn't allocate the D-Bus message"); |
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99 | return FALSE; |
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100 | } |
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101 | |
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102 | dbus_message_iter_init_append (message, &iter); |
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103 | dbus_message_iter_append_basic (&iter, |
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104 | DBUS_TYPE_STRING, |
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105 | &str); |
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106 | |
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107 | dbus_error_init (&error); |
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108 | reply = dbus_connection_send_with_reply_and_block (connection, |
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109 | message, |
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110 | -1, |
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111 | &error); |
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112 | |
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113 | dbus_message_unref (message); |
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114 | |
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115 | if (dbus_error_is_set (&error)) { |
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116 | g_warning ("%s %s raised: %s\n", |
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117 | method, |
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118 | error.name, |
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119 | error.message); |
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120 | return FALSE; |
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121 | } |
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122 | if (reply != NULL) { |
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123 | dbus_message_unref (reply); |
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124 | } |
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125 | dbus_connection_flush (connection); |
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126 | |
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127 | return TRUE; |
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128 | } |
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129 | |
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130 | |
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131 | static gboolean |
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132 | send_dbus_void_method (DBusConnection *connection, |
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133 | const char *method) |
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134 | { |
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135 | DBusError error; |
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136 | DBusMessage *message; |
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137 | DBusMessage *reply; |
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138 | |
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139 | g_debug ("GdmChooserClient: Calling %s", method); |
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140 | message = dbus_message_new_method_call (NULL, |
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141 | CHOOSER_SERVER_DBUS_PATH, |
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142 | CHOOSER_SERVER_DBUS_INTERFACE, |
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143 | method); |
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144 | if (message == NULL) { |
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145 | g_warning ("Couldn't allocate the D-Bus message"); |
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146 | return FALSE; |
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147 | } |
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148 | |
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149 | dbus_error_init (&error); |
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150 | reply = dbus_connection_send_with_reply_and_block (connection, |
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151 | message, |
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152 | -1, |
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153 | &error); |
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154 | |
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155 | dbus_message_unref (message); |
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156 | |
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157 | if (dbus_error_is_set (&error)) { |
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158 | g_warning ("%s %s raised: %s\n", |
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159 | method, |
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160 | error.name, |
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161 | error.message); |
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162 | return FALSE; |
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163 | } |
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164 | if (reply != NULL) { |
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165 | dbus_message_unref (reply); |
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166 | } |
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167 | dbus_connection_flush (connection); |
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168 | |
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169 | return TRUE; |
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170 | } |
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171 | |
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172 | void |
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173 | gdm_chooser_client_call_select_hostname (GdmChooserClient *client, |
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174 | const char *text) |
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175 | { |
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176 | send_dbus_string_method (client->priv->connection, |
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177 | "SelectHostname", |
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178 | text); |
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179 | } |
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180 | |
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181 | void |
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182 | gdm_chooser_client_call_disconnect (GdmChooserClient *client) |
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183 | { |
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184 | send_dbus_void_method (client->priv->connection, |
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185 | "Disconnect"); |
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186 | } |
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187 | |
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188 | static DBusHandlerResult |
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189 | client_dbus_handle_message (DBusConnection *connection, |
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190 | DBusMessage *message, |
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191 | void *user_data, |
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192 | dbus_bool_t local_interface) |
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193 | { |
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194 | |
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195 | #if 0 |
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196 | g_message ("obj_path=%s interface=%s method=%s destination=%s", |
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197 | dbus_message_get_path (message), |
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198 | dbus_message_get_interface (message), |
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199 | dbus_message_get_member (message), |
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200 | dbus_message_get_destination (message)); |
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201 | #endif |
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202 | |
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203 | g_return_val_if_fail (connection != NULL, DBUS_HANDLER_RESULT_NOT_YET_HANDLED); |
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204 | g_return_val_if_fail (message != NULL, DBUS_HANDLER_RESULT_NOT_YET_HANDLED); |
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205 | |
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206 | |
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207 | return DBUS_HANDLER_RESULT_HANDLED; |
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208 | } |
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209 | |
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210 | static DBusHandlerResult |
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211 | client_dbus_filter_function (DBusConnection *connection, |
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212 | DBusMessage *message, |
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213 | void *user_data) |
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214 | { |
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215 | GdmChooserClient *client = GDM_CHOOSER_CLIENT (user_data); |
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216 | const char *path; |
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217 | |
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218 | path = dbus_message_get_path (message); |
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219 | |
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220 | g_debug ("GdmChooserClient: obj_path=%s interface=%s method=%s", |
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221 | dbus_message_get_path (message), |
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222 | dbus_message_get_interface (message), |
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223 | dbus_message_get_member (message)); |
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224 | |
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225 | if (dbus_message_is_signal (message, DBUS_INTERFACE_LOCAL, "Disconnected") |
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226 | && strcmp (path, DBUS_PATH_LOCAL) == 0) { |
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227 | |
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228 | g_message ("Got disconnected from the session message bus"); |
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229 | |
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230 | dbus_connection_unref (connection); |
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231 | client->priv->connection = NULL; |
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232 | |
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233 | } else if (dbus_message_is_signal (message, |
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234 | DBUS_INTERFACE_DBUS, |
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235 | "NameOwnerChanged")) { |
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236 | g_debug ("GdmChooserClient: Name owner changed?"); |
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237 | } else { |
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238 | return client_dbus_handle_message (connection, message, user_data, FALSE); |
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239 | } |
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240 | |
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241 | return DBUS_HANDLER_RESULT_HANDLED; |
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242 | } |
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243 | |
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244 | gboolean |
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245 | gdm_chooser_client_start (GdmChooserClient *client, |
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246 | GError **error) |
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247 | { |
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248 | gboolean ret; |
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249 | DBusError local_error; |
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250 | |
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251 | g_return_val_if_fail (GDM_IS_CHOOSER_CLIENT (client), FALSE); |
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252 | |
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253 | ret = FALSE; |
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254 | |
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255 | if (client->priv->address == NULL) { |
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256 | g_warning ("GDM_CHOOSER_DBUS_ADDRESS not set"); |
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257 | g_set_error (error, |
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258 | GDM_CHOOSER_CLIENT_ERROR, |
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259 | GDM_CHOOSER_CLIENT_ERROR_GENERIC, |
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260 | "GDM_CHOOSER_DBUS_ADDRESS not set"); |
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261 | goto out; |
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262 | } |
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263 | |
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264 | g_debug ("GdmChooserClient: connecting to address: %s", client->priv->address); |
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265 | |
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266 | dbus_error_init (&local_error); |
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267 | client->priv->connection = dbus_connection_open (client->priv->address, &local_error); |
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268 | if (client->priv->connection == NULL) { |
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269 | if (dbus_error_is_set (&local_error)) { |
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270 | g_warning ("error opening connection: %s", local_error.message); |
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271 | g_set_error (error, |
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272 | GDM_CHOOSER_CLIENT_ERROR, |
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273 | GDM_CHOOSER_CLIENT_ERROR_GENERIC, |
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274 | "%s", local_error.message); |
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275 | dbus_error_free (&local_error); |
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276 | } else { |
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277 | g_warning ("Unable to open connection"); |
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278 | } |
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279 | goto out; |
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280 | } |
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281 | |
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282 | dbus_connection_setup_with_g_main (client->priv->connection, NULL); |
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283 | dbus_connection_set_exit_on_disconnect (client->priv->connection, TRUE); |
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284 | |
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285 | dbus_connection_add_filter (client->priv->connection, |
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286 | client_dbus_filter_function, |
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287 | client, |
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288 | NULL); |
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289 | |
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290 | ret = TRUE; |
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291 | |
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292 | out: |
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293 | return ret; |
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294 | } |
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295 | |
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296 | void |
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297 | gdm_chooser_client_stop (GdmChooserClient *client) |
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298 | { |
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299 | g_return_if_fail (GDM_IS_CHOOSER_CLIENT (client)); |
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300 | |
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301 | } |
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302 | |
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303 | static void |
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304 | gdm_chooser_client_set_property (GObject *object, |
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305 | guint prop_id, |
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306 | const GValue *value, |
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307 | GParamSpec *pspec) |
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308 | { |
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309 | switch (prop_id) { |
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310 | default: |
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311 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
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312 | break; |
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313 | } |
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314 | } |
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315 | |
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316 | static void |
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317 | gdm_chooser_client_get_property (GObject *object, |
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318 | guint prop_id, |
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319 | GValue *value, |
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320 | GParamSpec *pspec) |
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321 | { |
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322 | switch (prop_id) { |
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323 | default: |
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324 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
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325 | break; |
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326 | } |
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327 | } |
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328 | |
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329 | static GObject * |
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330 | gdm_chooser_client_constructor (GType type, |
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331 | guint n_construct_properties, |
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332 | GObjectConstructParam *construct_properties) |
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333 | { |
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334 | GdmChooserClient *chooser_client; |
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335 | |
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336 | chooser_client = GDM_CHOOSER_CLIENT (G_OBJECT_CLASS (gdm_chooser_client_parent_class)->constructor (type, |
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337 | n_construct_properties, |
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338 | construct_properties)); |
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339 | |
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340 | return G_OBJECT (chooser_client); |
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341 | } |
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342 | |
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343 | static void |
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344 | gdm_chooser_client_dispose (GObject *object) |
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345 | { |
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346 | g_debug ("GdmChooserClient: Disposing chooser_client"); |
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347 | |
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348 | G_OBJECT_CLASS (gdm_chooser_client_parent_class)->dispose (object); |
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349 | } |
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350 | |
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351 | static void |
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352 | gdm_chooser_client_class_init (GdmChooserClientClass *klass) |
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353 | { |
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354 | GObjectClass *object_class = G_OBJECT_CLASS (klass); |
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355 | |
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356 | object_class->get_property = gdm_chooser_client_get_property; |
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357 | object_class->set_property = gdm_chooser_client_set_property; |
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358 | object_class->constructor = gdm_chooser_client_constructor; |
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359 | object_class->dispose = gdm_chooser_client_dispose; |
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360 | object_class->finalize = gdm_chooser_client_finalize; |
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361 | |
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362 | g_type_class_add_private (klass, sizeof (GdmChooserClientPrivate)); |
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363 | } |
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364 | |
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365 | static void |
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366 | gdm_chooser_client_init (GdmChooserClient *client) |
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367 | { |
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368 | |
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369 | client->priv = GDM_CHOOSER_CLIENT_GET_PRIVATE (client); |
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370 | |
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371 | client->priv->address = g_strdup (g_getenv ("GDM_CHOOSER_DBUS_ADDRESS")); |
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372 | } |
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373 | |
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374 | static void |
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375 | gdm_chooser_client_finalize (GObject *object) |
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376 | { |
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377 | GdmChooserClient *client; |
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378 | |
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379 | g_return_if_fail (object != NULL); |
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380 | g_return_if_fail (GDM_IS_CHOOSER_CLIENT (object)); |
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381 | |
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382 | client = GDM_CHOOSER_CLIENT (object); |
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383 | |
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384 | g_return_if_fail (client->priv != NULL); |
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385 | |
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386 | g_free (client->priv->address); |
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387 | |
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388 | G_OBJECT_CLASS (gdm_chooser_client_parent_class)->finalize (object); |
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389 | } |
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390 | |
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391 | GdmChooserClient * |
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392 | gdm_chooser_client_new (void) |
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393 | { |
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394 | if (client_object != NULL) { |
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395 | g_object_ref (client_object); |
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396 | } else { |
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397 | client_object = g_object_new (GDM_TYPE_CHOOSER_CLIENT, NULL); |
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398 | g_object_add_weak_pointer (client_object, |
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399 | (gpointer *) &client_object); |
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400 | } |
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401 | |
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402 | return GDM_CHOOSER_CLIENT (client_object); |
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403 | } |
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