#include <unistd.h>
#include <limits.h>
+#include <signal.h>
#include <sys/param.h>
+#include <string.h>
+
+#include <glib/gprintf.h>
+#include <glib-unix.h>
#include "hostnamed-gen.h"
+#include "hostnamed.h"
GPtrArray *hostnamed_freeable;
-GDBusNodeInfo *spect_data;
-hostnamedHostname1 *hostnamed_interf;
+Hostname1 *hostnamed_interf;
+
+GMainLoop *hostnamed_loop;
-/* begin method/property/signal code */
+guint bus_descriptor;
+gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */
+
+/* --- begin method/property/dbus signal code --- */
-/* TODO make sure these guys only work if called by root */
static gboolean
-on_handle_set_hostname(hostnamedHostname1 *hn1_passed_interf,
+on_handle_set_hostname(Hostname1 *hn1_passed_interf,
GDBusMethodInvocation *invoc,
const gchar *greet,
gpointer data) {
}
static gboolean
-on_handle_set_static_hostname(hostnamedHostname1 *hn1_passed_interf,
+on_handle_set_static_hostname(Hostname1 *hn1_passed_interf,
GDBusMethodInvocation *invoc,
const gchar *greet,
gpointer data) {
}
static gboolean
-on_handle_set_pretty_hostname(hostnamedHostname1 *hn1_passed_interf,
+on_handle_set_pretty_hostname(Hostname1 *hn1_passed_interf,
GDBusMethodInvocation *invoc,
const gchar *greet,
gpointer data) {
}
static gboolean
-on_handle_set_chassis(hostnamedHostname1 *hn1_passed_interf,
+on_handle_set_chassis(Hostname1 *hn1_passed_interf,
GDBusMethodInvocation *invoc,
const gchar *greet,
gpointer data) {
}
static gboolean
-on_handle_set_icon_name(hostnamedHostname1 *hn1_passed_interf,
+on_handle_set_icon_name(Hostname1 *hn1_passed_interf,
GDBusMethodInvocation *invoc,
const gchar *greet,
gpointer data) {
const gchar *
our_get_hostname() {
- int hostname_try;
- gchar *hostname_buf;
+ gchar *hostname_buf, *ret;
+ size_t hostname_divider;
+
+ hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN);
+ ret = (gchar*) g_malloc0(MAXHOSTNAMELEN);
- hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN);
- hostname_try = gethostname(hostname_buf, MAXHOSTNAMELEN);
+ g_ptr_array_add(hostnamed_freeable, hostname_buf);
+ g_ptr_array_add(hostnamed_freeable, ret);
- return hostname_buf;
+ if(gethostname(hostname_buf, MAXHOSTNAMELEN) || g_strcmp0(hostname_buf, "") == 0)
+ return "localhost";
+
+ hostname_divider = strcspn(hostname_buf, ".");
+
+ return strncpy(ret, hostname_buf, hostname_divider);
}
const gchar *
our_get_static_hostname() {
- return "TODO";
+ gchar *pretty_hostname;
+ gchar *ret;
+
+ pretty_hostname = our_get_pretty_hostname();
+
+ if(g_strcmp0(pretty_hostname, "") == 0)
+ ret = our_get_hostname();
+
+ else if(ret = g_hostname_to_ascii(pretty_hostname)) {
+
+ g_ptr_array_add(hostnamed_freeable, ret);
+ return ret;
+ }
+
+ return ret;
}
const gchar *
our_get_pretty_hostname() {
- return "TODO";
+ GKeyFile *config;
+ gchar *ret;
+
+ if(g_key_file_load_from_file(config, "/etc/systemd_compat.conf", G_KEY_FILE_NONE, NULL)
+ && ret = g_key_file_get_value(config, "hostnamed", "PrettyHostname", NULL)) { /* ret might need to be freed, docs dont specify but i am suspicious */
+
+ g_free(config);
+ return ret;
+ }
+
+ if(config)
+ g_free(config);
+
+ return "";
}
const gchar *
return "TODO";
}
-/* end method/property/signal code, begin bus/name handlers */
+/* --- end method/property/dbus signal code, begin bus/name handlers --- */
static void hostnamed_on_bus_acquired(GDBusConnection *conn,
const gchar *name,
gpointer user_data) {
- g_print("got bus, name: %s\n", name);
-
-}
-
-static void hostnamed_on_name_acquired(GDBusConnection *conn,
- const gchar *name,
- gpointer user_data) {
-
- g_print("got '%s' on system bus\n", name);
+ g_printf("got bus/name, exporting %s's interface...\n", name);
- hostnamed_interf = hostnamed_hostname1_skeleton_new();
+ hostnamed_interf = hostname1_skeleton_new();
/* attach function pointers to generated struct's method handlers */
g_signal_connect(hostnamed_interf, "handle-set-hostname", G_CALLBACK(on_handle_set_hostname), NULL);
g_signal_connect(hostnamed_interf, "handle-set-icon-name", G_CALLBACK(on_handle_set_icon_name), NULL);
/* set our properties before export */
- hostnamed_hostname1_set_hostname(hostnamed_interf, our_get_hostname());
- hostnamed_hostname1_set_static_hostname(hostnamed_interf, our_get_static_hostname());
- hostnamed_hostname1_set_pretty_hostname(hostnamed_interf, our_get_pretty_hostname());
- hostnamed_hostname1_set_chassis(hostnamed_interf, our_get_chassis());
- hostnamed_hostname1_set_icon_name(hostnamed_interf, our_get_icon_name());
- hostnamed_hostname1_set_kernel_name(hostnamed_interf, our_get_kernel_name());
- hostnamed_hostname1_set_kernel_version(hostnamed_interf, our_get_kernel_version());
- hostnamed_hostname1_set_kernel_release(hostnamed_interf, our_get_kernel_release());
- hostnamed_hostname1_set_operating_system_cpename(hostnamed_interf, our_get_os_cpename());
- hostnamed_hostname1_set_operating_system_pretty_name(hostnamed_interf, our_get_os_pretty_name());
+ hostname1_set_hostname(hostnamed_interf, our_get_hostname());
+ hostname1_set_static_hostname(hostnamed_interf, our_get_static_hostname());
+ hostname1_set_pretty_hostname(hostnamed_interf, our_get_pretty_hostname());
+ hostname1_set_chassis(hostnamed_interf, our_get_chassis());
+ hostname1_set_icon_name(hostnamed_interf, our_get_icon_name());
+ hostname1_set_kernel_name(hostnamed_interf, our_get_kernel_name());
+ hostname1_set_kernel_version(hostnamed_interf, our_get_kernel_version());
+ hostname1_set_kernel_release(hostnamed_interf, our_get_kernel_release());
+ hostname1_set_operating_system_cpename(hostnamed_interf, our_get_os_cpename());
+ hostname1_set_operating_system_pretty_name(hostnamed_interf, our_get_os_pretty_name());
if(!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(hostnamed_interf),
- conn,
- "/org/freedesktop/hostname1",
- NULL)) {
+ conn,
+ "/org/freedesktop/hostname1",
+ NULL)) {
- g_printf("failed to export hostname1's interface on system bus!");
- }
+ g_printf("failed to export %s's interface!\n", name); /* unusual edge case, TODO check errno */
+ hostnamed_mem_clean();
+
+ } else {
+ dbus_interface_exported = TRUE;
+ g_printf("exported %s's interface on the system bus...\n", name);
+ }
}
-/* free()'s */
-void hostnamed_mem_clean() {
+static void hostnamed_on_name_acquired(GDBusConnection *conn,
+ const gchar *name,
+ gpointer user_data) {
- g_ptr_array_foreach(hostnamed_freeable, (GFunc) g_free, NULL);
+ g_printf("success!\n");
}
static void hostnamed_on_name_lost(GDBusConnection *conn,
- const gchar *name,
- gpointer user_data) {
+ const gchar *name,
+ gpointer user_data) {
+
+ if(!conn) {
- g_print("lost name %s, exiting...", name);
+ 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);
+ hostnamed_mem_clean();
+ }
+
+ g_printf("lost name %s, exiting...\n", name);
hostnamed_mem_clean();
- g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(hostnamed_interf));
+}
+
+/* --- end bus/name handlers, begin misc unix functions --- */
+
+/* safe call to clean and then exit
+ * this stops our GMainLoop safely before letting main() return */
+void hostnamed_mem_clean() {
+
+ g_printf("exiting...\n");
+
+ if(dbus_interface_exported)
+ g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(hostnamed_interf));
+
+ if(g_main_loop_is_running(hostnamed_loop))
+ g_main_loop_quit(hostnamed_loop);
- /* TODO exit through g_main_loop properly... */
}
-/* safe call to try and start hostnamed */
-void hostnamed_init() {
+/* wrapper for glib's unix signal handling; called only once if terminatating signal is raised against us */
+gboolean unix_sig_terminate_handler(gpointer data) {
- guint bus_descriptor;
+ g_printf("caught SIGINT/HUP/TERM, exiting\n");
- bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM,
- "org.freedesktop.hostname1",
- G_BUS_NAME_OWNER_FLAGS_NONE,
- hostnamed_on_bus_acquired,
- hostnamed_on_name_acquired,
- hostnamed_on_name_lost,
- NULL,
- NULL);
-
- /* TODO: malloc and return reference as if a main() closed */
+ hostnamed_mem_clean();
+ return G_SOURCE_REMOVE;
+}
+
+void set_signal_handlers() {
+
+ /* we don't care about its descriptor, we never need to unregister these */
+ g_unix_signal_add(SIGINT, unix_sig_terminate_handler, NULL);
+ g_unix_signal_add(SIGHUP, unix_sig_terminate_handler, NULL);
+ g_unix_signal_add(SIGTERM, unix_sig_terminate_handler, NULL);
+
+ /* TODO: the "only once" guarantee only counts towards specific signals.
+ * make sure calling a SIGINT and SIGHUP doesn't cause term_handler()
+ * to be called twice */
}
int main() {
+
+ set_signal_handlers();
+
+ hostnamed_loop = g_main_loop_new(NULL, TRUE);
+ hostnamed_freeable = g_ptr_array_new();
- GMainLoop *hostnamed_loop;
- hostnamed_loop = g_main_loop_new(NULL, TRUE);
+ bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM,
+ "org.freedesktop.hostname1",
+ G_BUS_NAME_OWNER_FLAGS_NONE,
+ hostnamed_on_bus_acquired,
+ hostnamed_on_name_acquired,
+ hostnamed_on_name_lost,
+ NULL,
+ NULL);
- /* config stuff here */
+ g_main_loop_run(hostnamed_loop);
+ /* runs until single g_main_loop_quit() call is raised inside <interface>_mem_clean() */
+ g_main_loop_unref(hostnamed_loop);
+ /* guaranteed unownable */
+ g_bus_unown_name(bus_descriptor);
- hostnamed_init();
- g_main_loop_run(hostnamed_loop);
- g_main_loop_unref(hostnamed_loop);
+ /* at this point no operations can occur with our data, it is safe to free it + its container */
+ g_ptr_array_free(hostnamed_freeable, TRUE);
- return 0;
+ return 0;
}
/* TODO figure out DMI variables on obsd */
projects / systembsd.git / blobdiff