git.ozlabs.org Git - petitboot/blob - discover/pb-discover.c

   1
   2 #if defined(HAVE_CONFIG_H)
   3 #include "config.h"
   4 #endif
   5
   6 #include <assert.h>
   7 #include <getopt.h>
   8 #include <stdlib.h>
   9 #include <signal.h>
  10 #include <string.h>
  11
  12 #include <waiter/waiter.h>
  13 #include <log/log.h>
  14 #include <pb-config/pb-config.h>
  15
  16 #include "udev.h"
  17 #include "user-event.h"
  18 #include "discover-server.h"
  19 #include "device-handler.h"
  20 #include "network.h"
  21
  22 static void print_version(void)
  23 {
  24         printf("pb-discover (" PACKAGE_NAME ") " PACKAGE_VERSION "\n");
  25 }
  26
  27 static void print_usage(void)
  28 {
  29         print_version();
  30         printf(
  31 "Usage: pb-discover [-h, --help] [-l, --log log-file] [-V, --version]\n");
  32 }
  33
  34 /**
  35  * enum opt_value - Tri-state options variables.
  36  */
  37
  38 enum opt_value {opt_undef = 0, opt_yes, opt_no};
  39
  40 /**
  41  * struct opts - Values from command line options.
  42  */
  43
  44 struct opts {
  45         enum opt_value show_help;
  46         const char *log_file;
  47         enum opt_value show_version;
  48         enum opt_value dry_run;
  49 };
  50
  51 /**
  52  * opts_parse - Parse the command line options.
  53  */
  54
  55 static int opts_parse(struct opts *opts, int argc, char *argv[])
  56 {
  57         static const struct option long_options[] = {
  58                 {"help",           no_argument,       NULL, 'h'},
  59                 {"log",            required_argument, NULL, 'l'},
  60                 {"dry-run",        no_argument,       NULL, 'n'},
  61                 {"version",        no_argument,       NULL, 'V'},
  62                 { NULL, 0, NULL, 0},
  63         };
  64         static const char short_options[] = "hl:nV";
  65         static const struct opts default_values = {
  66                 .log_file = "/var/log/petitboot/pb-discover.log",
  67                 .dry_run = opt_no,
  68         };
  69
  70         *opts = default_values;
  71
  72         while (1) {
  73                 int c = getopt_long(argc, argv, short_options, long_options,
  74                         NULL);
  75
  76                 if (c == EOF)
  77                         break;
  78
  79                 switch (c) {
  80                 case 'h':
  81                         opts->show_help = opt_yes;
  82                         break;
  83                 case 'l':
  84                         opts->log_file = optarg;
  85                         break;
  86                 case 'n':
  87                         opts->dry_run = opt_yes;
  88                         break;
  89                 case 'V':
  90                         opts->show_version = opt_yes;
  91                         break;
  92                 default:
  93                         opts->show_help = opt_yes;
  94                         return -1;
  95                 }
  96         }
  97
  98         return optind != argc;
  99 }
 100
 101 static int running;
 102
 103 static void sigint_handler(int __attribute__((unused)) signum)
 104 {
 105         running = 0;
 106 }
 107
 108 int main(int argc, char *argv[])
 109 {
 110         struct device_handler *handler;
 111         struct discover_server *server;
 112         struct network *network;
 113         struct waitset *waitset;
 114         struct opts opts;
 115         struct pb_udev *udev;
 116         struct user_event *uev;
 117
 118         if (opts_parse(&opts, argc, argv)) {
 119                 print_usage();
 120                 return EXIT_FAILURE;
 121         }
 122
 123         if (opts.show_help == opt_yes) {
 124                 print_usage();
 125                 return EXIT_SUCCESS;
 126         }
 127
 128         if (opts.show_version == opt_yes) {
 129                 print_version();
 130                 return EXIT_SUCCESS;
 131         }
 132
 133         if (strcmp(opts.log_file, "-")) {
 134                 FILE *log = fopen(opts.log_file, "a");
 135
 136                 assert(log);
 137                 pb_log_set_stream(log);
 138         } else
 139                 pb_log_set_stream(stderr);
 140
 141 #if defined(DEBUG)
 142         pb_log_always_flush(1);
 143 #endif
 144         pb_log("--- pb-discover ---\n");
 145
 146         /* we look for closed sockets when we write, so ignore SIGPIPE */
 147         signal(SIGPIPE, SIG_IGN);
 148
 149         signal(SIGINT, sigint_handler);
 150
 151         config_init(NULL);
 152
 153         waitset = waitset_create(NULL);
 154
 155         server = discover_server_init(waitset);
 156         if (!server)
 157                 return EXIT_FAILURE;
 158
 159         network = network_init(server, waitset, opts.dry_run == opt_yes);
 160         if (!network)
 161                 return EXIT_FAILURE;
 162
 163         handler = device_handler_init(server, waitset, opts.dry_run == opt_yes);
 164         if (!handler)
 165                 return EXIT_FAILURE;
 166
 167         discover_server_set_device_source(server, handler);
 168
 169         udev = udev_init(waitset, handler);
 170         if (!udev)
 171                 return EXIT_FAILURE;
 172
 173         uev = user_event_init(waitset, handler);
 174         if (!uev)
 175                 return EXIT_FAILURE;
 176
 177         user_event_trigger(uev);
 178
 179         for (running = 1; running;) {
 180                 if (waiter_poll(waitset))
 181                         break;
 182         }
 183
 184         device_handler_destroy(handler);
 185         waitset_destroy(waitset);
 186         udev_destroy(udev);
 187         config_fini();
 188
 189         pb_log("--- end ---\n");
 190
 191         return EXIT_SUCCESS;
 192 }