Exemplo n.º 1
0
int bus_open_system_systemd(sd_bus **_bus) {
        _cleanup_bus_unref_ sd_bus *bus = NULL;
        int r;

        assert(_bus);

        if (geteuid() != 0)
                return sd_bus_open_system(_bus);

        /* If we are root, then let's talk directly to the system
         * instance, instead of going via the bus */

        r = sd_bus_new(&bus);
        if (r < 0)
                return r;

        r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
        if (r < 0)
                return r;

        r = sd_bus_start(bus);
        if (r < 0)
                return r;

        r = bus_check_peercred(bus);
        if (r < 0)
                return r;

        *_bus = bus;
        bus = NULL;

        return 0;
}
Exemplo n.º 2
0
int bus_open_user_systemd(sd_bus **_bus) {
        _cleanup_bus_unref_ sd_bus *bus = NULL;
        _cleanup_free_ char *ee = NULL;
        const char *e;
        int r;

        /* Try via kdbus first, and then directly */

        assert(_bus);

#ifdef ENABLE_KDBUS
        r = sd_bus_new(&bus);
        if (r < 0)
                return r;

        if (asprintf(&bus->address, KERNEL_USER_BUS_FMT, getuid()) < 0)
                return -ENOMEM;

        bus->bus_client = true;

        r = sd_bus_start(bus);
        if (r >= 0) {
                *_bus = bus;
                bus = NULL;
                return 0;
        }

        bus = sd_bus_unref(bus);
#endif

        e = secure_getenv("XDG_RUNTIME_DIR");
        if (!e)
                return sd_bus_open_user(_bus);

        ee = bus_address_escape(e);
        if (!ee)
                return -ENOMEM;

        r = sd_bus_new(&bus);
        if (r < 0)
                return r;

        bus->address = strjoin("unix:path=", ee, "/systemd/private", NULL);
        if (!bus->address)
                return -ENOMEM;

        r = sd_bus_start(bus);
        if (r < 0)
                return sd_bus_open_user(_bus);

        r = bus_check_peercred(bus);
        if (r < 0)
                return r;

        *_bus = bus;
        bus = NULL;

        return 0;
}
Exemplo n.º 3
0
int bus_open_system_systemd(sd_bus **_bus) {
        _cleanup_bus_unref_ sd_bus *bus = NULL;
        int r;

        assert(_bus);

        if (geteuid() != 0)
                return sd_bus_open_system(_bus);

        /* If we are root and kdbus is not available, then let's talk
         * directly to the system instance, instead of going via the
         * bus */

#ifdef ENABLE_KDBUS
        r = sd_bus_new(&bus);
        if (r < 0)
                return r;

        r = sd_bus_set_address(bus, KERNEL_SYSTEM_BUS_PATH);
        if (r < 0)
                return r;

        bus->bus_client = true;

        r = sd_bus_start(bus);
        if (r >= 0) {
                *_bus = bus;
                bus = NULL;
                return 0;
        }

        bus = sd_bus_unref(bus);
#endif

        r = sd_bus_new(&bus);
        if (r < 0)
                return r;

        r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
        if (r < 0)
                return r;

        r = sd_bus_start(bus);
        if (r < 0)
                return sd_bus_open_system(_bus);

        r = bus_check_peercred(bus);
        if (r < 0)
                return r;

        *_bus = bus;
        bus = NULL;

        return 0;
}
Exemplo n.º 4
0
int main(int argc, char *argv[]) {
        DBusError error;
        DBusConnection *bus = NULL;
        DBusMessage *m = NULL;
        int r = EXIT_FAILURE;

        dbus_error_init(&error);

        if (argc != 2) {
                log_error("Incorrect number of arguments.");
                goto finish;
        }

        log_set_target(LOG_TARGET_AUTO);
        log_parse_environment();
        log_open();

        /* We send this event to the private D-Bus socket and then the
         * system instance will forward this to the system bus. We do
         * this to avoid an activation loop when we start dbus when we
         * are called when the dbus service is shut down. */

        if (!(bus = dbus_connection_open_private("unix:path=/run/systemd/private", &error))) {
#ifndef LEGACY
                dbus_error_free(&error);

                /* Retry with the pre v21 socket name, to ease upgrades */
                if (!(bus = dbus_connection_open_private("unix:abstract=/org/freedesktop/systemd1/private", &error))) {
#endif
                        log_error("Failed to get D-Bus connection: %s", bus_error_message(&error));
                        goto finish;
                }
#ifndef LEGACY
        }
#endif

        if (bus_check_peercred(bus) < 0) {
                log_error("Bus owner not root.");
                goto finish;
        }

        if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1/agent", "org.freedesktop.systemd1.Agent", "Released"))) {
                log_error("Could not allocate signal message.");
                goto finish;
        }

        if (!dbus_message_append_args(m,
                                      DBUS_TYPE_STRING, &argv[1],
                                      DBUS_TYPE_INVALID)) {
                log_error("Could not attach group information to signal message.");
                goto finish;
        }

        if (!dbus_connection_send(bus, m, NULL)) {
                log_error("Failed to send signal message on private connection.");
                goto finish;
        }

        r = EXIT_SUCCESS;

finish:
        if (bus) {
                dbus_connection_flush(bus);
                dbus_connection_close(bus);
                dbus_connection_unref(bus);
        }

        if (m)
                dbus_message_unref(m);

        dbus_error_free(&error);
        return r;
}