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

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <getopt.h>
   4
   5 #include "sd-daemon.h"
   6
   7 #include "manager.h"
   8 #include "signal-util.h"
   9 #include "strv.h"
  10 #include "terminal-util.h"
  11
  12 static bool arg_quiet = false;
  13 static usec_t arg_timeout = 120 * USEC_PER_SEC;
  14 static char **arg_interfaces = NULL;
  15 static char **arg_ignore = NULL;
  16
  17 static int help(void) {
  18         _cleanup_free_ char *link = NULL;
  19         int r;
  20
  21         r = terminal_urlify_man("systemd-networkd-wait-online.service", "8", &link);
  22         if (r < 0)
  23                 return log_oom();
  24
  25         printf("%s [OPTIONS...]\n\n"
  26                "Block until network is configured.\n\n"
  27                "  -h --help                 Show this help\n"
  28                "     --version              Print version string\n"
  29                "  -q --quiet                Do not show status information\n"
  30                "  -i --interface=INTERFACE  Block until at least these interfaces have appeared\n"
  31                "     --ignore=INTERFACE     Don't take these interfaces into account\n"
  32                "     --timeout=SECS         Maximum time to wait for network connectivity\n"
  33                "\nSee the %s for details.\n"
  34                , program_invocation_short_name
  35                , link
  36         );
  37
  38         return 0;
  39 }
  40
  41 static int parse_argv(int argc, char *argv[]) {
  42
  43         enum {
  44                 ARG_VERSION = 0x100,
  45                 ARG_IGNORE,
  46                 ARG_TIMEOUT,
  47         };
  48
  49         static const struct option options[] = {
  50                 { "help",            no_argument,       NULL, 'h'         },
  51                 { "version",         no_argument,       NULL, ARG_VERSION },
  52                 { "quiet",           no_argument,       NULL, 'q'         },
  53                 { "interface",       required_argument, NULL, 'i'         },
  54                 { "ignore",          required_argument, NULL, ARG_IGNORE  },
  55                 { "timeout",         required_argument, NULL, ARG_TIMEOUT  },
  56                 {}
  57         };
  58
  59         int c, r;
  60
  61         assert(argc >= 0);
  62         assert(argv);
  63
  64         while ((c = getopt_long(argc, argv, "+hi:q", options, NULL)) >= 0)
  65
  66                 switch (c) {
  67
  68                 case 'h':
  69                         help();
  70                         return 0;
  71
  72                 case 'q':
  73                         arg_quiet = true;
  74                         break;
  75
  76                 case ARG_VERSION:
  77                         return version();
  78
  79                 case 'i':
  80                         if (strv_extend(&arg_interfaces, optarg) < 0)
  81                                 return log_oom();
  82
  83                         break;
  84
  85                 case ARG_IGNORE:
  86                         if (strv_extend(&arg_ignore, optarg) < 0)
  87                                 return log_oom();
  88
  89                         break;
  90
  91                 case ARG_TIMEOUT:
  92                         r = parse_sec(optarg, &arg_timeout);
  93                         if (r < 0)
  94                                 return r;
  95
  96                         break;
  97
  98                 case '?':
  99                         return -EINVAL;
 100
 101                 default:
 102                         assert_not_reached("Unhandled option");
 103                 }
 104
 105         return 1;
 106 }
 107
 108 int main(int argc, char *argv[]) {
 109         _cleanup_(manager_freep) Manager *m = NULL;
 110         int r;
 111
 112         log_set_target(LOG_TARGET_AUTO);
 113         log_parse_environment();
 114         log_open();
 115
 116         umask(0022);
 117
 118         r = parse_argv(argc, argv);
 119         if (r <= 0)
 120                 return r;
 121
 122         if (arg_quiet)
 123                 log_set_max_level(LOG_WARNING);
 124
 125         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
 126
 127         r = manager_new(&m, arg_interfaces, arg_ignore, arg_timeout);
 128         if (r < 0) {
 129                 log_error_errno(r, "Could not create manager: %m");
 130                 goto finish;
 131         }
 132
 133         if (manager_all_configured(m)) {
 134                 r = 0;
 135                 goto finish;
 136         }
 137
 138         sd_notify(false,
 139                   "READY=1\n"
 140                   "STATUS=Waiting for network connections...");
 141
 142         r = sd_event_loop(m->event);
 143         if (r < 0) {
 144                 log_error_errno(r, "Event loop failed: %m");
 145                 goto finish;
 146         }
 147
 148 finish:
 149         strv_free(arg_interfaces);
 150         strv_free(arg_ignore);
 151
 152         if (r >= 0) {
 153                 sd_notify(false, "STATUS=All interfaces configured...");
 154
 155                 return EXIT_SUCCESS;
 156         } else {
 157                 sd_notify(false, "STATUS=Failed waiting for network connectivity...");
 158
 159                 return EXIT_FAILURE;
 160         }
 161 }