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