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 #include "capability.h"
  24 #include "signal-util.h"
  25 #include "networkd.h"
  26
  27 int main(int argc, char *argv[]) {
  28         _cleanup_manager_free_ Manager *m = NULL;
  29         const char *user = "systemd-network";
  30         uid_t uid;
  31         gid_t gid;
  32         int r;
  33
  34         log_set_target(LOG_TARGET_AUTO);
  35         log_parse_environment();
  36         log_open();
  37
  38         umask(0022);
  39
  40         if (argc != 1) {
  41                 log_error("This program takes no arguments.");
  42                 r = -EINVAL;
  43                 goto out;
  44         }
  45
  46         r = get_user_creds(&user, &uid, &gid, NULL, NULL);
  47         if (r < 0) {
  48                 log_error_errno(r, "Cannot resolve user name %s: %m", user);
  49                 goto out;
  50         }
  51
  52         /* Always create the directories people can create inotify
  53          * watches in. */
  54         r = mkdir_safe_label("/run/systemd/netif", 0755, uid, gid);
  55         if (r < 0)
  56                 log_warning_errno(r, "Could not create runtime directory: %m");
  57
  58         r = mkdir_safe_label("/run/systemd/netif/links", 0755, uid, gid);
  59         if (r < 0)
  60                 log_warning_errno(r, "Could not create runtime directory 'links': %m");
  61
  62         r = mkdir_safe_label("/run/systemd/netif/leases", 0755, uid, gid);
  63         if (r < 0)
  64                 log_warning_errno(r, "Could not create runtime directory 'leases': %m");
  65
  66         r = mkdir_safe_label("/run/systemd/netif/lldp", 0755, uid, gid);
  67         if (r < 0)
  68                 log_warning_errno(r, "Could not create runtime directory 'lldp': %m");
  69
  70         r = drop_privileges(uid, gid,
  71                             (1ULL << CAP_NET_ADMIN) |
  72                             (1ULL << CAP_NET_BIND_SERVICE) |
  73                             (1ULL << CAP_NET_BROADCAST) |
  74                             (1ULL << CAP_NET_RAW));
  75         if (r < 0)
  76                 goto out;
  77
  78         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
  79
  80         r = manager_new(&m);
  81         if (r < 0) {
  82                 log_error_errno(r, "Could not create manager: %m");
  83                 goto out;
  84         }
  85
  86         r = manager_connect_bus(m);
  87         if (r < 0) {
  88                 log_error_errno(r, "Could not connect to bus: %m");
  89                 goto out;
  90         }
  91
  92         r = manager_load_config(m);
  93         if (r < 0) {
  94                 log_error_errno(r, "Could not load configuration files: %m");
  95                 goto out;
  96         }
  97
  98         r = manager_rtnl_enumerate_links(m);
  99         if (r < 0) {
 100                 log_error_errno(r, "Could not enumerate links: %m");
 101                 goto out;
 102         }
 103
 104         r = manager_rtnl_enumerate_addresses(m);
 105         if (r < 0) {
 106                 log_error_errno(r, "Could not enumerate addresses: %m");
 107                 goto out;
 108         }
 109
 110         log_info("Enumeration completed");
 111
 112         sd_notify(false,
 113                   "READY=1\n"
 114                   "STATUS=Processing requests...");
 115
 116         r = manager_run(m);
 117         if (r < 0) {
 118                 log_error_errno(r, "Event loop failed: %m");
 119                 goto out;
 120         }
 121
 122 out:
 123         sd_notify(false,
 124                   "STOPPING=1\n"
 125                   "STATUS=Shutting down...");
 126
 127         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 128 }