src/interfaces/localed/localed.c

   1 /*
   2  * Copyright (c) 2014 Ian Sutton <ian@kremlin.cc>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <unistd.h>
  18 #include <limits.h>
  19 #include <signal.h>
  20
  21 #include <sys/param.h>
  22 #include <string.h>
  23
  24 #include <glib/gprintf.h>
  25 #include <glib-unix.h>
  26 #include <polkit/polkit.h>
  27
  28 #include "localed-gen.h"
  29 #include "localed.h"
  30
  31 #include "../../util.h"
  32
  33 GPtrArray *localed_freeable;
  34 Locale1 *localed_interf;
  35
  36 GMainLoop *localed_loop;
  37
  38 guint bus_descriptor;
  39 gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */
  40
  41 /* --- begin method/property/dbus signal code --- */
  42
  43 static gboolean
  44 on_handle_set_locale(Locale1 *hn1_passed_interf,
  45                      GDBusMethodInvocation *invoc,
  46                      const gchar *greet,
  47                      gpointer data) {
  48     return FALSE;
  49 }
  50
  51 static gboolean
  52 on_handle_set_v_console_keyboard(Locale1 *hn1_passed_interf,
  53                                  GDBusMethodInvocation *invoc,
  54                                  const gchar *greet,
  55                                  gpointer data) {
  56     return FALSE;
  57 }
  58
  59 static gboolean
  60 on_handle_set_x11_keyboard(Locale1 *hn1_passed_interf,
  61                            GDBusMethodInvocation *invoc,
  62                            const gchar *greet,
  63                            gpointer data) {
  64     return FALSE;
  65 }
  66
  67 const gchar * const *
  68 our_get_locale() {
  69
  70     const gchar * const *ret = NULL;
  71
  72     return ret;
  73 }
  74
  75 const gchar *
  76 our_get_v_console_keymap() {
  77
  78     return "";
  79 }
  80
  81 const gchar *
  82 our_get_v_console_keymap_toggle() {
  83
  84     return "";
  85 }
  86
  87 const gchar *
  88 our_get_x11_layout() {
  89
  90     return "";
  91 }
  92
  93 const gchar *
  94 our_get_x11_model() {
  95
  96     return "";
  97 }
  98
  99 const gchar *
 100 our_get_x11_variant() {
 101
 102     return "";
 103 }
 104
 105 const gchar *
 106 our_get_x11_options() {
 107
 108     return "";
 109 }
 110
 111
 112 /* --- end method/property/dbus signal code, begin bus/name handlers --- */
 113
 114 static void localed_on_bus_acquired(GDBusConnection *conn,
 115                                     const gchar *name,
 116                                     gpointer user_data) {
 117
 118     g_printf("got bus/name, exporting %s's interface...\n", name);
 119
 120     localed_interf = locale1_skeleton_new();
 121
 122     /* attach function pointers to generated struct's method handlers */
 123     g_signal_connect(localed_interf, "handle-set-locale", G_CALLBACK(on_handle_set_locale), NULL);
 124     g_signal_connect(localed_interf, "handle-set-vconsole-keyboard", G_CALLBACK(on_handle_set_v_console_keyboard), NULL);
 125     g_signal_connect(localed_interf, "handle-set-x11-keyboard", G_CALLBACK(on_handle_set_x11_keyboard), NULL);
 126
 127     /* set our properties before export */
 128     locale1_set_locale(localed_interf, our_get_locale());
 129     locale1_set_vconsole_keymap(localed_interf, our_get_v_console_keymap());
 130     locale1_set_vconsole_keymap_toggle(localed_interf, our_get_v_console_keymap_toggle());
 131     locale1_set_x11_layout(localed_interf, our_get_x11_layout());
 132     locale1_set_x11_model(localed_interf, our_get_x11_model());
 133     locale1_set_x11_variant(localed_interf, our_get_x11_variant());
 134     locale1_set_x11_options(localed_interf, our_get_x11_options());
 135
 136     if(!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(localed_interf),
 137                                          conn,
 138                                          "/org/freedesktop/locale1",
 139                                          NULL)) {
 140
 141         g_printf("failed to export %s's interface!\n", name);
 142         localed_mem_clean();
 143
 144     } else {
 145
 146         dbus_interface_exported = TRUE;
 147         g_printf("exported %s's interface on the system bus...\n", name);
 148     }
 149 }
 150
 151 static void localed_on_name_acquired(GDBusConnection *conn,
 152                                      const gchar *name,
 153                                      gpointer user_data) {
 154
 155     g_printf("success!\n");
 156 }
 157
 158 static void localed_on_name_lost(GDBusConnection *conn,
 159                                    const gchar *name,
 160                                    gpointer user_data) {
 161
 162     if(!conn) {
 163
 164         g_printf("failed to connect to the system bus while trying to acquire name '%s': either dbus-daemon isn't running or we don't have permission to push names and/or their interfaces to it.\n", name);
 165         localed_mem_clean();
 166     }
 167
 168     g_print("lost name %s, exiting...\n", name);
 169
 170     localed_mem_clean();
 171 }
 172
 173 /* --- end bus/name handlers, begin misc unix functions --- */
 174
 175 /* safe call to clean and then exit
 176  * this stops our GMainLoop safely before letting main() return */
 177 void localed_mem_clean() {
 178
 179     g_printf("exiting...\n");
 180
 181     if(dbus_interface_exported)
 182         g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(localed_interf));
 183
 184     if(g_main_loop_is_running(localed_loop))
 185         g_main_loop_quit(localed_loop);
 186
 187 }
 188
 189 /* wrapper for glib's unix signal handling; called only once if terminating signal is raised against us */
 190 gboolean unix_sig_terminate_handler(gpointer data) {
 191
 192     g_printf("caught SIGINT/HUP/TERM, exiting\n");
 193
 194     localed_mem_clean();
 195     return G_SOURCE_REMOVE;
 196 }
 197
 198 void set_signal_handlers() {
 199
 200     /* we don't care about its descriptor, we never need to unregister these */
 201     g_unix_signal_add(SIGINT,  unix_sig_terminate_handler, NULL);
 202     g_unix_signal_add(SIGHUP,  unix_sig_terminate_handler, NULL);
 203     g_unix_signal_add(SIGTERM, unix_sig_terminate_handler, NULL);
 204 }
 205
 206 int main() {
 207
 208     set_signal_handlers();
 209
 210     localed_loop = g_main_loop_new(NULL, TRUE);
 211     localed_freeable = g_ptr_array_new();
 212
 213      bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM,
 214                                     "org.freedesktop.locale1",
 215                                     G_BUS_NAME_OWNER_FLAGS_NONE,
 216                                     localed_on_bus_acquired,
 217                                     localed_on_name_acquired,
 218                                     localed_on_name_lost,
 219                                     NULL,
 220                                     NULL);
 221
 222     g_main_loop_run(localed_loop);
 223     /* runs until single g_main_loop_quit() call is raised inside <interface>_mem_clean() */
 224     g_main_loop_unref(localed_loop);
 225
 226     /* guaranteed unownable */
 227     g_bus_unown_name(bus_descriptor);
 228
 229     /* at this point no operations can occur with our data, it is safe to free it + its container */
 230     g_ptr_array_free(localed_freeable, TRUE);
 231
 232     return 0;
 233 }