/*-*- 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" #include "capability.h" int main(int argc, char *argv[]) { _cleanup_manager_free_ Manager *m = NULL; const char *user = "systemd-resolve"; uid_t uid; gid_t gid; 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; } r = get_user_creds(&user, &uid, &gid, NULL, NULL); if (r < 0) { log_error("Cannot resolve user name %s: %s", user, strerror(-r)); goto out; } /* Always create the directory where resolv.conf will live */ r = mkdir_safe_label("/run/systemd/resolve", 0755, uid, gid); if (r < 0) { log_error("Could not create runtime directory: %s", strerror(-r)); goto out; } r = drop_privileges(uid, gid, 0); if (r < 0) goto out; 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; }