X-Git-Url: https://uglyman.kremlin.cc/gitweb/gitweb.cgi?p=systembsd.git;a=blobdiff_plain;f=src%2Finterfaces%2Fhostnamed%2Fhostnamed.c;h=38d811cd952f078a59f3442a967574a0edb058a1;hp=9648d25f0aed25d8d8dda6424a9d5c9e2a0480e5;hb=a2fffc07173bab908d10ac2d66f73d33f085c601;hpb=ccd2f75bfcd00cf5c7b79f480c2d3f38ad837fa6 diff --git a/src/interfaces/hostnamed/hostnamed.c b/src/interfaces/hostnamed/hostnamed.c index 9648d25..38d811c 100644 --- a/src/interfaces/hostnamed/hostnamed.c +++ b/src/interfaces/hostnamed/hostnamed.c @@ -16,6 +16,7 @@ #include #include +#include #include #include @@ -24,10 +25,16 @@ #include #include "hostnamed-gen.h" +#include "hostnamed.h" GPtrArray *hostnamed_freeable; Hostname1 *hostnamed_interf; +GMainLoop *hostnamed_loop; + +guint bus_descriptor; +gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */ + /* --- begin method/property/dbus signal code --- */ static gboolean @@ -79,32 +86,60 @@ on_handle_set_icon_name(Hostname1 *hn1_passed_interf, const gchar * our_get_hostname() { - gchar *hostname_buf, *ret; - size_t hostname_divider; + gchar *hostname_buf, *ret; + size_t hostname_divider; - hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN); - ret = (gchar*) g_malloc0(MAXHOSTNAMELEN); - g_ptr_array_add(hostnamed_freeable, hostname_buf); - g_ptr_array_add(hostnamed_freeable, ret); + hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN); + ret = (gchar*) g_malloc0(MAXHOSTNAMELEN); - if(gethostname(hostname_buf, MAXHOSTNAMELEN)) - return ""; + g_ptr_array_add(hostnamed_freeable, hostname_buf); + g_ptr_array_add(hostnamed_freeable, ret); - hostname_divider = strcspn(hostname_buf, "."); + if(gethostname(hostname_buf, MAXHOSTNAMELEN) || g_strcmp0(hostname_buf, "") == 0) + return "localhost"; - return strncpy(ret, hostname_buf, hostname_divider); + 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 * @@ -155,15 +190,7 @@ 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 = hostname1_skeleton_new(); @@ -191,56 +218,102 @@ static void hostnamed_on_name_acquired(GDBusConnection *conn, "/org/freedesktop/hostname1", NULL)) { - g_printf("Failed to export Hostname1's interface!"); + 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); } +} +static void hostnamed_on_name_acquired(GDBusConnection *conn, + const gchar *name, + gpointer user_data) { + + g_printf("success!\n"); +} + +static void hostnamed_on_name_lost(GDBusConnection *conn, + const gchar *name, + gpointer user_data) { + + if(!conn) { + + 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(); } /* --- end bus/name handlers, begin misc unix functions --- */ -/* free()'s */ +/* safe call to clean and then exit + * this stops our GMainLoop safely before letting main() return */ void hostnamed_mem_clean() { - g_ptr_array_foreach(hostnamed_freeable, (GFunc) g_free, NULL); - g_ptr_array_free(hostnamed_freeable, TRUE); + 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); + } -static void hostnamed_on_name_lost(GDBusConnection *conn, - const gchar *name, - gpointer user_data) { +/* wrapper for glib's unix signal handling; called only once if terminatating signal is raised against us */ +gboolean unix_sig_terminate_handler(gpointer data) { - g_print("lost name %s, exiting...", name); + g_printf("caught SIGINT/HUP/TERM, exiting\n"); hostnamed_mem_clean(); - g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(hostnamed_interf)); + 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(); - guint bus_descriptor; - GMainLoop *hostnamed_loop; - - hostnamed_loop = g_main_loop_new(NULL, TRUE); - hostnamed_freeable = g_ptr_array_new(); + hostnamed_loop = g_main_loop_new(NULL, TRUE); + hostnamed_freeable = g_ptr_array_new(); - 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); + 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); - g_main_loop_run(hostnamed_loop); - g_main_loop_unref(hostnamed_loop); + g_main_loop_run(hostnamed_loop); + /* runs until single g_main_loop_quit() call is raised inside _mem_clean() */ + g_main_loop_unref(hostnamed_loop); - g_bus_unown_name(bus_descriptor); + /* guaranteed unownable */ + g_bus_unown_name(bus_descriptor); - hostnamed_mem_clean(); + /* 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 */