networkd: don't hard depend on system bus

[elogind.git] / src / network / networkd-manager.c

diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index ca781e2bb477839095d9fd9bcc6f5d85e4587de9..c630ed7ed91aa6bae261a7ae5f3694a01aa5b4b6 100644 (file)
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -55,7 +55,7 @@ int manager_new(Manager **ret) {
                 return r;
 
         r = sd_bus_default_system(&m->bus);
-        if (r < 0)
+        if (r < 0 && r != -ENOENT) /* TODO: drop when we can rely on kdbus */
                 return r;
 
         m->udev = udev_new();
@@ -288,6 +288,11 @@ int manager_rtnl_listen(Manager *m) {
 int manager_bus_listen(Manager *m) {
         int r;
 
+        assert(m->event);
+
+        if (!m->bus) /* TODO: drop when we can rely on kdbus */
+                return 0;
+
         r = sd_bus_attach_event(m->bus, m->event, 0);
         if (r < 0)
                 return r;
@@ -334,18 +339,23 @@ int manager_update_resolv_conf(Manager *m) {
 
         fchmod(fileno(f), 0644);
 
-        fputs("# This file is managed by systemd-networkd(8). Do not edit.\n", f);
+        fputs("# This file is managed by systemd-networkd(8). Do not edit.\n#\n"
+              "# Third party programs must not access this file directly, but\n"
+              "# only through the symlink at /etc/resolv.conf. To manage\n"
+              "# resolv.conf(5) in a different way, replace the symlink by a\n"
+              "# static file or a different symlink.\n\n", f);
 
         HASHMAP_FOREACH(link, m->links, i) {
                 if (link->dhcp) {
-                        struct in_addr **nameservers;
+                        struct in_addr *nameservers;
+                        size_t nameservers_size;
 
-                        r = sd_dhcp_client_get_dns(link->dhcp, &nameservers);
+                        r = sd_dhcp_client_get_dns(link->dhcp, &nameservers, &nameservers_size);
                         if (r >= 0) {
                                 unsigned j;
 
-                                for (j = 0; nameservers[j]; j++)
-                                        append_dns(f, nameservers[j], AF_INET, &count);
+                                for (j = 0; j < nameservers_size; j++)
+                                        append_dns(f, &nameservers[j], AF_INET, &count);
                         }
                 }
         }