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 <errno.h> |
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27 | #include <string.h> |
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28 | #include <sys/types.h> |
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29 | #include <sys/stat.h> |
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30 | #include <fcntl.h> |
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31 | #include <signal.h> |
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32 | #include <locale.h> |
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33 | |
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34 | #include <glib.h> |
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35 | #include <glib/gi18n.h> |
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36 | #include <glib-object.h> |
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37 | |
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38 | #define DBUS_API_SUBJECT_TO_CHANGE |
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39 | #include <dbus/dbus-glib.h> |
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40 | #include <dbus/dbus-glib-lowlevel.h> |
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41 | |
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42 | #include "gdm-signal-handler.h" |
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43 | #include "gdm-log.h" |
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44 | #include "gdm-common.h" |
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45 | #include "gdm-product-slave.h" |
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46 | |
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47 | static int gdm_return_code = 0; |
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48 | |
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49 | static DBusGConnection * |
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50 | get_system_bus (void) |
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51 | { |
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52 | GError *error; |
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53 | DBusGConnection *bus; |
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54 | DBusConnection *connection; |
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55 | |
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56 | error = NULL; |
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57 | bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error); |
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58 | if (bus == NULL) { |
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59 | g_warning ("Couldn't connect to system bus: %s", |
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60 | error->message); |
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61 | g_error_free (error); |
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62 | goto out; |
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63 | } |
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64 | |
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65 | connection = dbus_g_connection_get_connection (bus); |
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66 | dbus_connection_set_exit_on_disconnect (connection, FALSE); |
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67 | |
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68 | out: |
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69 | return bus; |
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70 | } |
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71 | |
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72 | static gboolean |
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73 | signal_cb (int signo, |
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74 | gpointer data) |
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75 | { |
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76 | int ret; |
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77 | |
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78 | g_debug ("Got callback for signal %d", signo); |
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79 | |
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80 | ret = TRUE; |
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81 | |
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82 | switch (signo) { |
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83 | case SIGSEGV: |
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84 | case SIGBUS: |
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85 | case SIGILL: |
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86 | case SIGABRT: |
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87 | g_debug ("Caught signal %d.", signo); |
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88 | |
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89 | ret = FALSE; |
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90 | break; |
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91 | |
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92 | case SIGFPE: |
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93 | case SIGPIPE: |
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94 | /* let the fatal signals interrupt us */ |
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95 | g_debug ("Caught signal %d, shutting down abnormally.", signo); |
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96 | ret = FALSE; |
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97 | |
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98 | break; |
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99 | |
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100 | case SIGINT: |
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101 | case SIGTERM: |
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102 | /* let the fatal signals interrupt us */ |
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103 | g_debug ("Caught signal %d, shutting down normally.", signo); |
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104 | ret = FALSE; |
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105 | |
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106 | break; |
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107 | |
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108 | case SIGHUP: |
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109 | g_debug ("Got HUP signal"); |
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110 | /* FIXME: |
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111 | * Reread config stuff like system config files, VPN service files, etc |
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112 | */ |
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113 | ret = TRUE; |
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114 | |
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115 | break; |
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116 | |
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117 | case SIGUSR1: |
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118 | g_debug ("Got USR1 signal"); |
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119 | /* we get this from xorg - can't use for anything else */ |
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120 | ret = TRUE; |
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121 | |
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122 | break; |
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123 | |
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124 | case SIGUSR2: |
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125 | g_debug ("Got USR2 signal"); |
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126 | ret = TRUE; |
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127 | |
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128 | gdm_log_toggle_debug (); |
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129 | |
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130 | break; |
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131 | |
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132 | default: |
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133 | g_debug ("Caught unhandled signal %d", signo); |
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134 | ret = TRUE; |
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135 | |
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136 | break; |
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137 | } |
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138 | |
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139 | return ret; |
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140 | } |
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141 | |
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142 | static void |
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143 | on_slave_stopped (GdmSlave *slave, |
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144 | GMainLoop *main_loop) |
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145 | { |
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146 | g_debug ("slave finished"); |
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147 | gdm_return_code = 0; |
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148 | g_main_loop_quit (main_loop); |
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149 | } |
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150 | |
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151 | static gboolean |
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152 | is_debug_set (gboolean arg) |
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153 | { |
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154 | /* enable debugging for unstable builds */ |
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155 | if (gdm_is_version_unstable ()) { |
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156 | return TRUE; |
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157 | } |
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158 | |
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159 | return arg; |
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160 | } |
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161 | |
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162 | int |
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163 | main (int argc, |
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164 | char **argv) |
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165 | { |
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166 | GMainLoop *main_loop; |
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167 | GOptionContext *context; |
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168 | DBusGConnection *connection; |
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169 | GdmSlave *slave; |
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170 | static char *display_id = NULL; |
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171 | static gboolean debug = FALSE; |
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172 | GdmSignalHandler *signal_handler; |
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173 | static GOptionEntry entries [] = { |
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174 | { "debug", 0, 0, G_OPTION_ARG_NONE, &debug, N_("Enable debugging code"), NULL }, |
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175 | { "display-id", 0, 0, G_OPTION_ARG_STRING, &display_id, N_("Display ID"), N_("id") }, |
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176 | { NULL } |
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177 | }; |
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178 | |
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179 | bindtextdomain (GETTEXT_PACKAGE, GNOMELOCALEDIR); |
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180 | textdomain (GETTEXT_PACKAGE); |
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181 | setlocale (LC_ALL, ""); |
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182 | |
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183 | gdm_set_fatal_warnings_if_unstable (); |
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184 | |
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185 | g_type_init (); |
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186 | |
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187 | context = g_option_context_new (_("GNOME Display Manager Slave")); |
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188 | g_option_context_add_main_entries (context, entries, NULL); |
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189 | |
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190 | g_option_context_parse (context, &argc, &argv, NULL); |
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191 | g_option_context_free (context); |
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192 | |
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193 | connection = get_system_bus (); |
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194 | if (connection == NULL) { |
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195 | goto out; |
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196 | } |
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197 | |
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198 | gdm_log_init (); |
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199 | |
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200 | gdm_log_set_debug (is_debug_set (debug)); |
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201 | |
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202 | if (display_id == NULL) { |
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203 | g_critical ("No display ID set"); |
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204 | exit (1); |
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205 | } |
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206 | |
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207 | main_loop = g_main_loop_new (NULL, FALSE); |
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208 | |
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209 | signal_handler = gdm_signal_handler_new (); |
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210 | gdm_signal_handler_set_fatal_func (signal_handler, |
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211 | (GDestroyNotify)g_main_loop_quit, |
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212 | main_loop); |
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213 | gdm_signal_handler_add (signal_handler, SIGTERM, signal_cb, NULL); |
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214 | gdm_signal_handler_add (signal_handler, SIGINT, signal_cb, NULL); |
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215 | gdm_signal_handler_add (signal_handler, SIGILL, signal_cb, NULL); |
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216 | gdm_signal_handler_add (signal_handler, SIGBUS, signal_cb, NULL); |
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217 | gdm_signal_handler_add (signal_handler, SIGFPE, signal_cb, NULL); |
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218 | gdm_signal_handler_add (signal_handler, SIGHUP, signal_cb, NULL); |
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219 | gdm_signal_handler_add (signal_handler, SIGSEGV, signal_cb, NULL); |
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220 | gdm_signal_handler_add (signal_handler, SIGABRT, signal_cb, NULL); |
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221 | gdm_signal_handler_add (signal_handler, SIGUSR1, signal_cb, NULL); |
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222 | gdm_signal_handler_add (signal_handler, SIGUSR2, signal_cb, NULL); |
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223 | |
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224 | slave = gdm_product_slave_new (display_id); |
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225 | if (slave == NULL) { |
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226 | goto out; |
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227 | } |
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228 | g_signal_connect (slave, |
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229 | "stopped", |
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230 | G_CALLBACK (on_slave_stopped), |
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231 | main_loop); |
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232 | gdm_slave_start (slave); |
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233 | |
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234 | g_main_loop_run (main_loop); |
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235 | |
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236 | if (slave != NULL) { |
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237 | g_object_unref (slave); |
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238 | } |
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239 | |
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240 | if (signal_handler != NULL) { |
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241 | g_object_unref (signal_handler); |
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242 | } |
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243 | |
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244 | if (main_loop != NULL) { |
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245 | g_main_loop_unref (main_loop); |
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246 | } |
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247 | |
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248 | out: |
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249 | |
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250 | g_debug ("Slave finished"); |
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251 | |
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252 | return gdm_return_code; |
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253 | } |
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