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

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 /***
   4   Copyright © 2013 Tom Gundersen <teg@jklm.no>
   5 ***/
   6
   7 #include <getopt.h>
   8
   9 #include "sd-daemon.h"
  10
  11 #include "manager.h"
  12 #include "signal-util.h"
  13 #include "strv.h"
  14
  15 static bool arg_quiet = false;
  16 static usec_t arg_timeout = 120 * USEC_PER_SEC;
  17 static char **arg_interfaces = NULL;
  18 static char **arg_ignore = NULL;
  19
  20 static void help(void) {
  21         printf("%s [OPTIONS...]\n\n"
  22                "Block until network is configured.\n\n"
  23                "  -h --help                 Show this help\n"
  24                "     --version              Print version string\n"
  25                "  -q --quiet                Do not show status information\n"
  26                "  -i --interface=INTERFACE  Block until at least these interfaces have appeared\n"
  27                "     --ignore=INTERFACE     Don't take these interfaces into account\n"
  28                "     --timeout=SECS         Maximum time to wait for network connectivity\n"
  29                , program_invocation_short_name);
  30 }
  31
  32 static int parse_argv(int argc, char *argv[]) {
  33
  34         enum {
  35                 ARG_VERSION = 0x100,
  36                 ARG_IGNORE,
  37                 ARG_TIMEOUT,
  38         };
  39
  40         static const struct option options[] = {
  41                 { "help",            no_argument,       NULL, 'h'         },
  42                 { "version",         no_argument,       NULL, ARG_VERSION },
  43                 { "quiet",           no_argument,       NULL, 'q'         },
  44                 { "interface",       required_argument, NULL, 'i'         },
  45                 { "ignore",          required_argument, NULL, ARG_IGNORE  },
  46                 { "timeout",         required_argument, NULL, ARG_TIMEOUT  },
  47                 {}
  48         };
  49
  50         int c, r;
  51
  52         assert(argc >= 0);
  53         assert(argv);
  54
  55         while ((c = getopt_long(argc, argv, "+hi:q", options, NULL)) >= 0)
  56
  57                 switch (c) {
  58
  59                 case 'h':
  60                         help();
  61                         return 0;
  62
  63                 case 'q':
  64                         arg_quiet = true;
  65                         break;
  66
  67                 case ARG_VERSION:
  68                         return version();
  69
  70                 case 'i':
  71                         if (strv_extend(&arg_interfaces, optarg) < 0)
  72                                 return log_oom();
  73
  74                         break;
  75
  76                 case ARG_IGNORE:
  77                         if (strv_extend(&arg_ignore, optarg) < 0)
  78                                 return log_oom();
  79
  80                         break;
  81
  82                 case ARG_TIMEOUT:
  83                         r = parse_sec(optarg, &arg_timeout);
  84                         if (r < 0)
  85                                 return r;
  86
  87                         break;
  88
  89                 case '?':
  90                         return -EINVAL;
  91
  92                 default:
  93                         assert_not_reached("Unhandled option");
  94                 }
  95
  96         return 1;
  97 }
  98
  99 int main(int argc, char *argv[]) {
 100         _cleanup_(manager_freep) Manager *m = NULL;
 101         int r;
 102
 103         log_set_target(LOG_TARGET_AUTO);
 104         log_parse_environment();
 105         log_open();
 106
 107         umask(0022);
 108
 109         r = parse_argv(argc, argv);
 110         if (r <= 0)
 111                 return r;
 112
 113         if (arg_quiet)
 114                 log_set_max_level(LOG_WARNING);
 115
 116         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
 117
 118         r = manager_new(&m, arg_interfaces, arg_ignore, arg_timeout);
 119         if (r < 0) {
 120                 log_error_errno(r, "Could not create manager: %m");
 121                 goto finish;
 122         }
 123
 124         if (manager_all_configured(m)) {
 125                 r = 0;
 126                 goto finish;
 127         }
 128
 129         sd_notify(false,
 130                   "READY=1\n"
 131                   "STATUS=Waiting for network connections...");
 132
 133         r = sd_event_loop(m->event);
 134         if (r < 0) {
 135                 log_error_errno(r, "Event loop failed: %m");
 136                 goto finish;
 137         }
 138
 139 finish:
 140         strv_free(arg_interfaces);
 141         strv_free(arg_ignore);
 142
 143         if (r >= 0) {
 144                 sd_notify(false, "STATUS=All interfaces configured...");
 145
 146                 return EXIT_SUCCESS;
 147         } else {
 148                 sd_notify(false, "STATUS=Failed waiting for network connectivity...");
 149
 150                 return EXIT_FAILURE;
 151         }
 152 }