1 files changed, 78 insertions, 0 deletions
diff --git a/src/systemctl/systemctl-daemon-reload.c b/src/systemctl/systemctl-daemon-reload.c
new file mode 100644
index 0000000..7e9b456
--- /dev/null
+++ b/src/systemctl/systemctl-daemon-reload.c
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "bus-error.h"
+#include "bus-locator.h"
+#include "systemctl-daemon-reload.h"
+#include "systemctl-util.h"
+#include "systemctl.h"
+
+int daemon_reload(enum action action, bool graceful) {
+        _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 (action) {
+
+        case ACTION_RELOAD:
+                method = "Reload";
+                break;
+
+        case ACTION_REEXEC:
+                method = "Reexecute";
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, method);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        /* Reloading the daemon may take long, hence set a longer timeout here */
+        r = sd_bus_call(bus, m, DAEMON_RELOAD_TIMEOUT_SEC, &error, NULL);
+
+        /* On reexecution, we expect a disconnect, not a reply */
+        if (IN_SET(r, -ETIMEDOUT, -ECONNRESET) && action == ACTION_REEXEC)
+                return 1;
+        if (r < 0) {
+                if (graceful) { /* If graceful mode is selected, debug log, but don't fail */
+                        log_debug_errno(r, "%s daemon failed via the bus, ignoring: %s",
+                                        method, bus_error_message(&error, r));
+                        return 0;
+                }
+
+                return log_error_errno(r, "%s daemon failed: %s",
+                                       method, bus_error_message(&error, r));
+        }
+
+        return 1;
+}
+
+int verb_daemon_reload(int argc, char *argv[], void *userdata) {
+        enum action a;
+        int r;
+
+        assert(argc >= 1);
+
+        if (streq(argv[0], "daemon-reexec"))
+                a = ACTION_REEXEC;
+        else if (streq(argv[0], "daemon-reload"))
+                a = ACTION_RELOAD;
+        else
+                assert_not_reached();
+
+        r = daemon_reload(a, /* graceful= */ false);
+        if (r < 0)
+                return r;
+
+        return 0;
+}