src/network/networkd.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Tom Gundersen <teg@jklm.no>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "sd-daemon.h"
  21
  22 #include "capability-util.h"
  23 #include "networkd.h"
  24 #include "signal-util.h"
  25 #include "user-util.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         r = manager_rtnl_enumerate_routes(m);
 111         if (r < 0) {
 112                 log_error_errno(r, "Could not enumerate routes: %m");
 113                 goto out;
 114         }
 115
 116         log_info("Enumeration completed");
 117
 118         sd_notify(false,
 119                   "READY=1\n"
 120                   "STATUS=Processing requests...");
 121
 122         r = manager_run(m);
 123         if (r < 0) {
 124                 log_error_errno(r, "Event loop failed: %m");
 125                 goto out;
 126         }
 127
 128 out:
 129         sd_notify(false,
 130                   "STOPPING=1\n"
 131                   "STATUS=Shutting down...");
 132
 133         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 134 }