src/network/networkd.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include "sd-daemon.h"
  23
  24 #include "capability.h"
  25 #include "networkd.h"
  26 #include "signal-util.h"
  27 #include "user-util.h"
  28
  29 int main(int argc, char *argv[]) {
  30         _cleanup_manager_free_ Manager *m = NULL;
  31         const char *user = "systemd-network";
  32         uid_t uid;
  33         gid_t gid;
  34         int r;
  35
  36         log_set_target(LOG_TARGET_AUTO);
  37         log_parse_environment();
  38         log_open();
  39
  40         umask(0022);
  41
  42         if (argc != 1) {
  43                 log_error("This program takes no arguments.");
  44                 r = -EINVAL;
  45                 goto out;
  46         }
  47
  48         r = get_user_creds(&user, &uid, &gid, NULL, NULL);
  49         if (r < 0) {
  50                 log_error_errno(r, "Cannot resolve user name %s: %m", user);
  51                 goto out;
  52         }
  53
  54         /* Always create the directories people can create inotify
  55          * watches in. */
  56         r = mkdir_safe_label("/run/systemd/netif", 0755, uid, gid);
  57         if (r < 0)
  58                 log_warning_errno(r, "Could not create runtime directory: %m");
  59
  60         r = mkdir_safe_label("/run/systemd/netif/links", 0755, uid, gid);
  61         if (r < 0)
  62                 log_warning_errno(r, "Could not create runtime directory 'links': %m");
  63
  64         r = mkdir_safe_label("/run/systemd/netif/leases", 0755, uid, gid);
  65         if (r < 0)
  66                 log_warning_errno(r, "Could not create runtime directory 'leases': %m");
  67
  68         r = mkdir_safe_label("/run/systemd/netif/lldp", 0755, uid, gid);
  69         if (r < 0)
  70                 log_warning_errno(r, "Could not create runtime directory 'lldp': %m");
  71
  72         r = drop_privileges(uid, gid,
  73                             (1ULL << CAP_NET_ADMIN) |
  74                             (1ULL << CAP_NET_BIND_SERVICE) |
  75                             (1ULL << CAP_NET_BROADCAST) |
  76                             (1ULL << CAP_NET_RAW));
  77         if (r < 0)
  78                 goto out;
  79
  80         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
  81
  82         r = manager_new(&m);
  83         if (r < 0) {
  84                 log_error_errno(r, "Could not create manager: %m");
  85                 goto out;
  86         }
  87
  88         r = manager_connect_bus(m);
  89         if (r < 0) {
  90                 log_error_errno(r, "Could not connect to bus: %m");
  91                 goto out;
  92         }
  93
  94         r = manager_load_config(m);
  95         if (r < 0) {
  96                 log_error_errno(r, "Could not load configuration files: %m");
  97                 goto out;
  98         }
  99
 100         r = manager_rtnl_enumerate_links(m);
 101         if (r < 0) {
 102                 log_error_errno(r, "Could not enumerate links: %m");
 103                 goto out;
 104         }
 105
 106         r = manager_rtnl_enumerate_addresses(m);
 107         if (r < 0) {
 108                 log_error_errno(r, "Could not enumerate addresses: %m");
 109                 goto out;
 110         }
 111
 112         log_info("Enumeration completed");
 113
 114         sd_notify(false,
 115                   "READY=1\n"
 116                   "STATUS=Processing requests...");
 117
 118         r = manager_run(m);
 119         if (r < 0) {
 120                 log_error_errno(r, "Event loop failed: %m");
 121                 goto out;
 122         }
 123
 124 out:
 125         sd_notify(false,
 126                   "STOPPING=1\n"
 127                   "STATUS=Shutting down...");
 128
 129         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 130 }