X-Git-Url: https://uglyman.kremlin.cc/gitweb/gitweb.cgi?p=systembsd.git;a=blobdiff_plain;f=src%2Finterfaces%2Flogind%2Flogind.c;h=02323d05fe92d7267b4d8d2a8aa94870f98e243f;hp=7f8586d2942a9ccc05d0fd7d9beccc304b2bd9a4;hb=ed4cf3c89bbf73021ea8a1db6ceb86f2f93683cd;hpb=b6ad18ad0ae669ec0424f9dad4c15d3bb0826ba0 diff --git a/src/interfaces/logind/logind.c b/src/interfaces/logind/logind.c index 7f8586d..02323d0 100644 --- a/src/interfaces/logind/logind.c +++ b/src/interfaces/logind/logind.c @@ -16,18 +16,29 @@ #include #include +#include #include #include #include +#include +#include #include "logind-gen.h" +#include "logind.h" + +#include "../../util.h" GPtrArray *logind_freeable; Login1Manager *logind_interf; -/* --- begin method/property/signal code --- */ +GMainLoop *logind_loop; + +guint bus_descriptor; +gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */ + +/* --- begin method/property/dbus signal code --- */ /*static gboolean on_handle_set_hostname(Login1Manager *hn1_passed_interf, @@ -40,37 +51,29 @@ on_handle_set_hostname(Login1Manager *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(logind_freeable, hostname_buf); - g_ptr_array_add(logind_freeable, ret); + hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN); + ret = (gchar*) g_malloc0(MAXHOSTNAMELEN); + g_ptr_array_add(logind_freeable, hostname_buf); + g_ptr_array_add(logind_freeable, ret); - if(gethostname(hostname_buf, MAXHOSTNAMELEN)) - return ""; + if(gethostname(hostname_buf, MAXHOSTNAMELEN)) + return ""; - hostname_divider = strcspn(hostname_buf, "."); + hostname_divider = strcspn(hostname_buf, "."); - return strncpy(ret, hostname_buf, hostname_divider); + return strncpy(ret, hostname_buf, hostname_divider); }*/ -/* --- end method/property/signal code, begin bus/name handlers --- */ +/* --- end method/property/dbus signal code, begin bus/name handlers --- */ static void logind_on_bus_acquired(GDBusConnection *conn, const gchar *name, gpointer user_data) { - g_print("got bus, name: %s\n", name); - -} - -static void logind_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); logind_interf = login1_manager_skeleton_new(); @@ -85,40 +88,79 @@ static void logind_on_name_acquired(GDBusConnection *conn, "/org/freedesktop/login1_manager", NULL)) { - g_printf("Failed to export Login1Manager's interface!"); - } + g_printf("failed to export %s's interface!\n", name); + logind_mem_clean(); -} + } else { -/* --- end bus/name handlers, begin misc functions --- */ + dbus_interface_exported = TRUE; + g_printf("exported %s's interface on the system bus...\n", name); + } +} -/* free()'s */ -void logind_mem_clean() { +static void logind_on_name_acquired(GDBusConnection *conn, + const gchar *name, + gpointer user_data) { - g_ptr_array_foreach(logind_freeable, (GFunc) g_free, NULL); - g_ptr_array_free(logind_freeable, TRUE); + g_printf("success!\n"); } static void logind_on_name_lost(GDBusConnection *conn, const gchar *name, gpointer user_data) { - g_print("lost name %s, exiting...", name); + 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); + + } + + g_print("lost name %s, exiting...\n", name); + + logind_mem_clean(); +} + +/* --- end bus/name handlers, begin misc unix functions --- */ + +/* safe call to clean and then exit + * this stops our GMainLoop sfaely before letting main() return */ +void logind_mem_clean() { + + g_printf("exiting...\n"); + + if(dbus_interface_exported) + g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(logind_interf)); + + if(g_main_loop_is_running(logind_loop)) + g_main_loop_quit(logind_loop); + +} + +/* wrapper for glib's unix signal handling; called only once if terminating signal is raised against us */ +gboolean unix_sig_terminate_handler(gpointer data) { + + g_printf("caught SIGINT/HUP/TERM, exiting\n"); logind_mem_clean(); - g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(logind_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); } int main() { - guint bus_descriptor; - GMainLoop *logind_loop; + set_signal_handlers(); - logind_loop = g_main_loop_new(NULL, TRUE); - logind_freeable = g_ptr_array_new(); + logind_loop = g_main_loop_new(NULL, TRUE); + logind_freeable = g_ptr_array_new(); - bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM, + bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM, "org.freedesktop.login1_manager", G_BUS_NAME_OWNER_FLAGS_NONE, logind_on_bus_acquired, @@ -127,12 +169,16 @@ int main() { NULL, NULL); - g_main_loop_run(logind_loop); - g_main_loop_unref(logind_loop); + g_main_loop_run(logind_loop); + /* runs until single g_main_loop_quit() call is raised inside _mem_clean() */ + g_main_loop_unref(logind_loop); + + /* guaranteed unownable */ + g_bus_unown_name(bus_descriptor); - g_bus_unown_name(bus_descriptor); + /* at this point no operations can occur with our data, it is safe to free it + its container */ + g_ptr_array_free(logind_freeable, TRUE); - logind_mem_clean(); - return 0; + return 0; }