1 files changed, 63 insertions, 0 deletions
diff --git a/src/systemctl/systemctl-daemon-reload.c b/src/systemctl/systemctl-daemon-reload.c
new file mode 100644
index 0000000000..6730877e6d
--- /dev/null
+++ b/src/systemctl/systemctl-daemon-reload.c
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "bus-error.h"
+#include "bus-locator.h"
+#include "systemctl-daemon-reload.h"
+#include "systemctl-util.h"
+#include "systemctl.h"
+
+int daemon_reload(int argc, char *argv[], void *userdata) {
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+        const char *method;
+        sd_bus *bus;
+        int r;
+
+        r = acquire_bus(BUS_MANAGER, &bus);
+        if (r < 0)
+                return r;
+
+        polkit_agent_open_maybe();
+
+        switch (arg_action) {
+
+        case ACTION_RELOAD:
+                method = "Reload";
+                break;
+
+        case ACTION_REEXEC:
+                method = "Reexecute";
+                break;
+
+        case ACTION_SYSTEMCTL:
+                method = streq(argv[0], "daemon-reexec") ? "Reexecute" :
+                                     /* "daemon-reload" */ "Reload";
+                break;
+
+        default:
+                assert_not_reached("Unexpected action");
+        }
+
+        r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, method);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        /* Note we use an extra-long timeout here. This is because a reload or reexec means generators are
+         * rerun which are timed out after DEFAULT_TIMEOUT_USEC. Let's use twice that time here, so that the
+         * generators can have their timeout, and for everything else there's the same time budget in
+         * place. */
+
+        r = sd_bus_call(bus, m, DEFAULT_TIMEOUT_USEC * 2, &error, NULL);
+
+        /* On reexecution, we expect a disconnect, not a reply */
+        if (IN_SET(r, -ETIMEDOUT, -ECONNRESET) && streq(method, "Reexecute"))
+                r = 0;
+
+        if (r < 0 && arg_action == ACTION_SYSTEMCTL)
+                return log_error_errno(r, "Failed to reload daemon: %s", bus_error_message(&error, r));
+
+        /* Note that for the legacy commands (i.e. those with action != ACTION_SYSTEMCTL) we support
+         * fallbacks to the old ways of doing things, hence don't log any error in that case here. */
+
+        return r < 0 ? r : 0;
+}