resolved: add daemon to manage resolv.conf

Also remove the equivalent functionality from networkd.

1 files changed, 86 insertions, 0 deletions

diff --git a/src/resolve/resolved.c b/src/resolve/resolved.c
new file mode 100644
index 0000000000..82f43d6803
--- /dev/null
+++ b/src/resolve/resolved.c
@@ -0,0 +1,86 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "sd-event.h"
+#include "sd-daemon.h"
+
+#include "resolved.h"
+
+#include "mkdir.h"
+
+int main(int argc, char *argv[]) {
+        _cleanup_manager_free_ Manager *m = NULL;
+        int r;
+
+        log_set_target(LOG_TARGET_AUTO);
+        log_parse_environment();
+        log_open();
+
+        umask(0022);
+
+        if (argc != 1) {
+                log_error("This program takes no arguments.");
+                r = -EINVAL;
+                goto out;
+        }
+
+        /* Always create the directory where resolv.conf will live */
+        r = mkdir_label("/run/systemd/network", 0755);
+        if (r < 0)
+                log_error("Could not create runtime directory: %s",
+                          strerror(-r));
+
+        r = manager_new(&m);
+        if (r < 0) {
+                log_error("Could not create manager: %s", strerror(-r));
+                goto out;
+        }
+
+        r = manager_network_monitor_listen(m);
+        if (r < 0) {
+                log_error("Could not listen for network events: %s", strerror(-r));
+                goto out;
+        }
+
+        /* write out default resolv.conf to avoid a
+         * dangling symlink */
+        r = manager_update_resolv_conf(m);
+        if (r < 0) {
+                log_error("Could not create resolv.conf: %s", strerror(-r));
+                goto out;
+        }
+
+        sd_notify(false,
+                  "READY=1\n"
+                  "STATUS=Processing requests...");
+
+        r = sd_event_loop(m->event);
+        if (r < 0) {
+                log_error("Event loop failed: %s", strerror(-r));
+                goto out;
+        }
+
+out:
+        sd_notify(false,
+                  "STATUS=Shutting down...");
+
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}