src/network/wait-online/wait-online.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   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 <getopt.h>
  23
  24 #include "sd-daemon.h"
  25
  26 #include "manager.h"
  27 #include "signal-util.h"
  28 #include "strv.h"
  29
  30 static bool arg_quiet = false;
  31 static usec_t arg_timeout = 120 * USEC_PER_SEC;
  32 static char **arg_interfaces = NULL;
  33 static char **arg_ignore = NULL;
  34
  35 static void help(void) {
  36         printf("%s [OPTIONS...]\n\n"
  37                "Block until network is configured.\n\n"
  38                "  -h --help                 Show this help\n"
  39                "     --version              Print version string\n"
  40                "  -q --quiet                Do not show status information\n"
  41                "  -i --interface=INTERFACE  Block until at least these interfaces have appeared\n"
  42                "     --ignore=INTERFACE     Don't take these interfaces into account\n"
  43                "     --timeout=SECS         Maximum time to wait for network connectivity\n"
  44                , program_invocation_short_name);
  45 }
  46
  47 static int parse_argv(int argc, char *argv[]) {
  48
  49         enum {
  50                 ARG_VERSION = 0x100,
  51                 ARG_IGNORE,
  52                 ARG_TIMEOUT,
  53         };
  54
  55         static const struct option options[] = {
  56                 { "help",            no_argument,       NULL, 'h'         },
  57                 { "version",         no_argument,       NULL, ARG_VERSION },
  58                 { "quiet",           no_argument,       NULL, 'q'         },
  59                 { "interface",       required_argument, NULL, 'i'         },
  60                 { "ignore",          required_argument, NULL, ARG_IGNORE  },
  61                 { "timeout",         required_argument, NULL, ARG_TIMEOUT  },
  62                 {}
  63         };
  64
  65         int c, r;
  66
  67         assert(argc >= 0);
  68         assert(argv);
  69
  70         while ((c = getopt_long(argc, argv, "+hi:q", options, NULL)) >= 0)
  71
  72                 switch (c) {
  73
  74                 case 'h':
  75                         help();
  76                         return 0;
  77
  78                 case 'q':
  79                         arg_quiet = true;
  80                         break;
  81
  82                 case ARG_VERSION:
  83                         return version();
  84
  85                 case 'i':
  86                         if (strv_extend(&arg_interfaces, optarg) < 0)
  87                                 return log_oom();
  88
  89                         break;
  90
  91                 case ARG_IGNORE:
  92                         if (strv_extend(&arg_ignore, optarg) < 0)
  93                                 return log_oom();
  94
  95                         break;
  96
  97                 case ARG_TIMEOUT:
  98                         r = parse_sec(optarg, &arg_timeout);
  99                         if (r < 0)
 100                                 return r;
 101
 102                         break;
 103
 104                 case '?':
 105                         return -EINVAL;
 106
 107                 default:
 108                         assert_not_reached("Unhandled option");
 109                 }
 110
 111         return 1;
 112 }
 113
 114 int main(int argc, char *argv[]) {
 115         _cleanup_(manager_freep) Manager *m = NULL;
 116         int r;
 117
 118         log_set_target(LOG_TARGET_AUTO);
 119         log_parse_environment();
 120         log_open();
 121
 122         umask(0022);
 123
 124         r = parse_argv(argc, argv);
 125         if (r <= 0)
 126                 return r;
 127
 128         if (arg_quiet)
 129                 log_set_max_level(LOG_WARNING);
 130
 131         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
 132
 133         r = manager_new(&m, arg_interfaces, arg_ignore, arg_timeout);
 134         if (r < 0) {
 135                 log_error_errno(r, "Could not create manager: %m");
 136                 goto finish;
 137         }
 138
 139         if (manager_all_configured(m)) {
 140                 r = 0;
 141                 goto finish;
 142         }
 143
 144         sd_notify(false,
 145                   "READY=1\n"
 146                   "STATUS=Waiting for network connections...");
 147
 148         r = sd_event_loop(m->event);
 149         if (r < 0) {
 150                 log_error_errno(r, "Event loop failed: %m");
 151                 goto finish;
 152         }
 153
 154 finish:
 155         strv_free(arg_interfaces);
 156         strv_free(arg_ignore);
 157
 158         if (r >= 0) {
 159                 sd_notify(false, "STATUS=All interfaces configured...");
 160
 161                 return EXIT_SUCCESS;
 162         } else {
 163                 sd_notify(false, "STATUS=Failed waiting for network connectivity...");
 164
 165                 return EXIT_FAILURE;
 166         }
 167 }