loginctl: use static destructor and DEFINE_MAIN_FUNCTION() macro

src/login/loginctl.c

@@ -18,6 +18,7 @@
 #include "log.h"
 #include "logs-show.h"
 #include "macro.h"
+#include "main-func.h"
 #include "pager.h"
 #include "parse-util.h"
 #include "process-util.h"
@@ -48,6 +49,8 @@ static bool arg_ask_password = true;
 static unsigned arg_lines = 10;
 static OutputMode arg_output = OUTPUT_SHORT;
 
+STATIC_DESTRUCTOR_REGISTER(arg_property, strv_freep);
+
 static OutputFlags get_output_flags(void) {
 
         return
@@ -1516,8 +1519,8 @@ static int loginctl_main(int argc, char *argv[], sd_bus *bus) {
         return dispatch_verb(argc, argv, verbs, bus);
 }
 
-int main(int argc, char *argv[]) {
-        sd_bus *bus = NULL;
+static int run(int argc, char *argv[]) {
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
         setlocale(LC_ALL, "");
@@ -1531,26 +1534,15 @@ int main(int argc, char *argv[]) {
 
         r = parse_argv(argc, argv);
         if (r <= 0)
-                goto finish;
+                return r;
 
         r = bus_connect_transport(arg_transport, arg_host, false, &bus);
-        if (r < 0) {
-                log_error_errno(r, "Failed to create bus connection: %m");
-                goto finish;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to create bus connection: %m");
 
-        sd_bus_set_allow_interactive_authorization(bus, arg_ask_password);
+        (void) sd_bus_set_allow_interactive_authorization(bus, arg_ask_password);
 
-        r = loginctl_main(argc, argv, bus);
-
-finish:
-        /* make sure we terminate the bus connection first, and then close the
-         * pager, see issue #3543 for the details. */
-        sd_bus_flush_close_unref(bus);
-        pager_close();
-        polkit_agent_close();
-
-        strv_free(arg_property);
-
-        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+        return loginctl_main(argc, argv, bus);
 }
+
+DEFINE_MAIN_FUNCTION(run);