src/interfaces/hostnamed/hostnamed.c

   1 #include <unistd.h>
   2 #include <limits.h>
   3 #include <gio/gio.h>
   4
   5
   6 GDBusNodeInfo *spect_data;
   7
   8 static gchar *hostname;
   9 static gchar *pretty_hostname;
  10 static gchar *static_hostname;
  11 static gchar *icon_name;
  12 static gchar *chassis;
  13 static gchar *kernel_name;
  14 static gchar *kernel_release;
  15 static gchar *kernel_version;
  16 static gchar *os_prettyname;
  17 static gchar *os_cpe;         //common platform enumeration string
  18
  19 static void handle_method_call(GDBusConnection *conn,
  20                                                            const gchar *sender,
  21                                                            const gchar *obj_path,
  22                                                            const gchar *interf_name,
  23                                                            const gchar *method_name,
  24                                                            GVariant *params,
  25                                                            GDBusMethodInvocation *invc,
  26                                                            gpointer usrdat) {
  27
  28         if(g_strcmp0(interf_name, "org.freedesktop.DBus.Introspectable") == 0
  29                 && g_strcmp0(method_name, "Introspect") == 0) {
  30
  31                 GVariant *xml_ret_gvar;
  32                 GString  *xml_ret;
  33
  34                 g_dbus_interface_info_generate_xml(spect_data->interfaces[0], (guint)0, xml_ret);
  35                 xml_ret_gvar = g_variant_new_string(xml_ret->str);
  36                 g_dbus_method_invocation_return_value(invc, xml_ret_gvar);
  37         }
  38
  39 }
  40
  41 static GVariant * handle_get_property(GDBusConnection *conn,
  42                                                                           const gchar *sender,
  43                                                                           const gchar *obj_path,
  44                                                                           const gchar *interf_name,
  45                                                                           const gchar *prop_name,
  46                                                                           GError **err,
  47                                                                           gpointer usr_data) {
  48
  49         const gchar *our_interf_name = "org.freedesktop.hostname1";
  50         const gchar *our_obj_path    = "/org/freedesktop/hostname1";
  51
  52         if(g_strcmp0(interf_name, our_interf_name) != 0
  53                 || g_strcmp0(obj_path, our_obj_path) != 0) {
  54
  55                 return NULL; //TODO error
  56         }
  57
  58         if(g_strcmp0(prop_name, "Hostname") == 0)
  59                 return g_variant_new_string(hostname);
  60
  61         else if(g_strcmp0(prop_name, "StaticHostname") == 0)
  62                 return g_variant_new_string(static_hostname);
  63
  64         else if(g_strcmp0(prop_name, "PrettyHostname") == 0)
  65                 return g_variant_new_string(pretty_hostname);
  66
  67         else if(g_strcmp0(prop_name, "IconName") == 0)
  68                 return g_variant_new_string(icon_name);
  69
  70         else
  71                 return NULL; //TODO error
  72
  73 }
  74
  75 static gboolean handle_set_property(GDBusConnection *conn,
  76                                                                         const gchar *sender,
  77                                                                         const gchar *obj_path,
  78                                                                         const gchar *interf_name,
  79                                                                         const gchar *prop_name,
  80                                                                         GVariant *val,
  81                                                                         GError **err,
  82                                                                         gpointer usr_data) {
  83
  84         g_dbus_connection_emit_signal(conn,
  85                                                                   NULL,
  86                                                                   obj_path,
  87                                                                   "org.freedesktop.DBus.Properties",
  88                                                                   "PropertiesChanged",
  89                                                                   NULL, /* incorrect */
  90                                                                   NULL);
  91
  92         return TRUE;
  93 }
  94
  95 /* "hot" functions initially passed to gdbus */
  96 static const GDBusInterfaceVTable interface_vtable =
  97 {
  98         handle_method_call,
  99         handle_get_property,
 100         handle_set_property
 101 };
 102
 103 /* end method/property functions, begin bus name handlers
 104  * TODO: these should be intertwined as to handle edge cases
 105  * for when the system cannot immediately grab the name, as
 106  * well as cases where the system unintendedly loses the name
 107  */
 108 static void on_bus_acquired(GDBusConnection *conn,
 109                                                         const gchar *name,
 110                                                         gpointer user_data) {
 111
 112         GError *err;
 113
 114         g_print("got bus, name: %s\n", name);
 115
 116         //GDBusObjectSkeleton *hostnamed_dbobj = g_dbus_object_skeleton_new("/org/freedesktop/hostname1");
 117
 118         g_dbus_connection_register_object(conn,
 119                                                                           "/org/freedesktop/hostname1",
 120                                                                           spect_data->interfaces[0],
 121                                                                           &interface_vtable,
 122                                                                           NULL, NULL, NULL);
 123 }
 124
 125 static void on_name_acquired(GDBusConnection *conn,
 126                                                          const gchar *name,
 127                                                          gpointer user_data) {
 128
 129         g_print("got name %s\n", name);
 130 }
 131
 132 static void on_name_lost(GDBusConnection *conn,
 133                                                  const gchar *name,
 134                                                  gpointer user_data) {
 135
 136         g_print("lost name %s, exiting...", name);
 137         //TODO exit through g_main_loop properly...
 138         exit(0);
 139 }
 140
 141 /* safe call to try and start hostnamed */
 142 GError * hostnamed_init() {
 143
 144         guint bus_descriptor;
 145         GError *err = NULL;
 146         gchar **hostnamed_ispect_xml = g_malloc(3000);
 147         gchar  *hostnamed_joined_xml = g_malloc(3000);
 148
 149         g_file_get_contents("conf/hostnamed-ispect.xml", hostnamed_ispect_xml, NULL, err);
 150         hostnamed_joined_xml = g_strjoinv("\n", hostnamed_ispect_xml);
 151         spect_data = g_dbus_node_info_new_for_xml(hostnamed_joined_xml, NULL);
 152
 153         if(!init_props())
 154                 return err; //TODO error
 155
 156         bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM,
 157                                         "org.freedesktop.hostname1",
 158                                                     G_BUS_NAME_OWNER_FLAGS_NONE,
 159                                                     on_bus_acquired,
 160                                                     on_name_acquired,
 161                                                     on_name_lost,
 162                                                     NULL,
 163                                                     NULL);
 164
 165         //TODO: malloc and return reference as if a main() closed
 166         return err;
 167 }
 168
 169 gboolean init_props() {
 170
 171         if(init_hostname()
 172                 && init_static_hostname()
 173                 && init_pretty_hostname()
 174                 && init_icon_name()
 175                 && init_chassis()
 176                 && init_kernel_name()
 177                 && init_kernel_version()
 178                 && init_os_name()
 179                 && init_os_cpe() )
 180                 return TRUE;
 181
 182         return FALSE;
 183 }
 184
 185 //POSIX, for future ports try_hostname should be checked for null-termination
 186 gboolean init_hostname() {
 187
 188         gchar try_hostname[HOST_NAME_MAX];
 189
 190         if(!gethostname(try_hostname, HOST_NAME_MAX)) {
 191                 hostname = try_hostname;
 192                 return TRUE;
 193         }
 194
 195         return FALSE;
 196 }
 197
 198 gboolean init_static_hostname() {
 199         //TODO
 200         return TRUE;
 201 }
 202
 203 gboolean init_pretty_hostname() {
 204         //TODO
 205         return TRUE;
 206 }
 207
 208 gboolean init_icon_name() {
 209         //TODO
 210         return TRUE;
 211 }
 212
 213 gboolean init_chassis() {
 214         //TODO
 215         return TRUE;
 216 }
 217
 218 gboolean init_kernel_name() {
 219         //TODO
 220         return TRUE;
 221 }
 222
 223 gboolean init_kernel_version() {
 224         //TODO
 225         return TRUE;
 226 }
 227
 228 gboolean init_os_name() {
 229         //TODO
 230         return TRUE;
 231 }
 232
 233 gboolean init_os_cpe() {
 234         //TODO
 235         return TRUE;
 236 }
 237
 238 //TODO figure out DMI variables on obsd
 239 /*static gchar *guess_icon_name() {
 240
 241     gchar *filebuf = NULL;
 242     gchar *ret = NULL;
 243
 244         //TODO vm check
 245
 246         #if defined(__i386__) || defined(__x86_64__)
 247     /*
 248        Taken with a few minor changes from systemd's hostnamed.c,
 249        copyright 2011 Lennart Poettering.
 250
 251        See the SMBIOS Specification 2.7.1 section 7.4.1 for
 252        details about the values listed here:
 253
 254        http://www.dmtf.org/sites/default/files/standards/documents/DSP0134_2.7.1.pdf
 255     */   /*
 256
 257     if (g_file_get_contents ("/sys/class/dmi/id/chassis_type", &filebuf, NULL, NULL)) {
 258         switch (g_ascii_strtoull (filebuf, NULL, 10)) {
 259         case 0x3:
 260         case 0x4:
 261         case 0x5:
 262         case 0x6:
 263         case 0x7:
 264             ret = g_strdup ("computer-desktop");
 265             goto out;
 266         case 0x9:
 267         case 0xA:
 268         case 0xE:
 269             ret = g_strdup ("computer-laptop");
 270             goto out;
 271         case 0x11:
 272         case 0x17:
 273         case 0x1C:
 274         case 0x1D:
 275             ret = g_strdup ("computer-server");
 276             goto out;
 277         }
 278     }
 279         #endif
 280     ret = g_strdup ("computer");
 281   out:
 282     g_free (filebuf);
 283     return ret;
 284 }*/