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 <process/process.h>
  15 #include <talloc/talloc.h>
  16
  17 #include "udev.h"
  18 #include "user-event.h"
  19 #include "discover-server.h"
  20 #include "device-handler.h"
  21 #include "network.h"
  22 #include "sysinfo.h"
  23 #include "platform.h"
  24
  25 static void print_version(void)
  26 {
  27         printf("pb-discover (" PACKAGE_NAME ") " PACKAGE_VERSION "\n");
  28 }
  29
  30 static void print_usage(void)
  31 {
  32         print_version();
  33         printf(
  34 "Usage: pb-discover [-a, --no-autoboot] [-h, --help] [-l, --log log-file]\n"
  35 "                   [-n, --dry-run] [-V, --version]\n");
  36 }
  37
  38 /**
  39  * enum opt_value - Tri-state options variables.
  40  */
  41
  42 enum opt_value {opt_undef = 0, opt_yes, opt_no};
  43
  44 /**
  45  * struct opts - Values from command line options.
  46  */
  47
  48 struct opts {
  49         enum opt_value no_autoboot;
  50         enum opt_value show_help;
  51         const char *log_file;
  52         enum opt_value dry_run;
  53         enum opt_value show_version;
  54 };
  55
  56 /**
  57  * opts_parse - Parse the command line options.
  58  */
  59
  60 static int opts_parse(struct opts *opts, int argc, char *argv[])
  61 {
  62         static const struct option long_options[] = {
  63                 {"no-autoboot",    no_argument,       NULL, 'a'},
  64                 {"help",           no_argument,       NULL, 'h'},
  65                 {"log",            required_argument, NULL, 'l'},
  66                 {"dry-run",        no_argument,       NULL, 'n'},
  67                 {"version",        no_argument,       NULL, 'V'},
  68                 { NULL, 0, NULL, 0},
  69         };
  70         static const char short_options[] = "ahl:nV";
  71         static const struct opts default_values = {
  72                 .no_autoboot = opt_no,
  73                 .log_file = "/var/log/petitboot/pb-discover.log",
  74                 .dry_run = opt_no,
  75         };
  76
  77         *opts = default_values;
  78
  79         while (1) {
  80                 int c = getopt_long(argc, argv, short_options, long_options,
  81                         NULL);
  82
  83                 if (c == EOF)
  84                         break;
  85
  86                 switch (c) {
  87                 case 'a':
  88                         opts->no_autoboot = opt_yes;
  89                         break;
  90                 case 'h':
  91                         opts->show_help = opt_yes;
  92                         break;
  93                 case 'l':
  94                         opts->log_file = optarg;
  95                         break;
  96                 case 'n':
  97                         opts->dry_run = opt_yes;
  98                         break;
  99                 case 'V':
 100                         opts->show_version = opt_yes;
 101                         break;
 102                 default:
 103                         opts->show_help = opt_yes;
 104                         return -1;
 105                 }
 106         }
 107
 108         return optind != argc;
 109 }
 110
 111 static int running;
 112
 113 static void sigint_handler(int __attribute__((unused)) signum)
 114 {
 115         running = 0;
 116 }
 117
 118 int main(int argc, char *argv[])
 119 {
 120         struct device_handler *handler;
 121         struct discover_server *server;
 122         struct network *network;
 123         struct waitset *waitset;
 124         struct procset *procset;
 125         struct opts opts;
 126         struct pb_udev *udev;
 127         struct user_event *uev;
 128         FILE *log;
 129
 130         if (opts_parse(&opts, argc, argv)) {
 131                 print_usage();
 132                 return EXIT_FAILURE;
 133         }
 134
 135         if (opts.show_help == opt_yes) {
 136                 print_usage();
 137                 return EXIT_SUCCESS;
 138         }
 139
 140         if (opts.show_version == opt_yes) {
 141                 print_version();
 142                 return EXIT_SUCCESS;
 143         }
 144
 145         log = stderr;
 146         if (strcmp(opts.log_file, "-")) {
 147                 log = fopen(opts.log_file, "a");
 148                 if (!log) {
 149                         fprintf(stderr, "can't open log file %s, logging to "
 150                                         "stderr\n", opts.log_file);
 151                         log = stderr;
 152                 }
 153         }
 154         pb_log_init(log);
 155
 156         pb_log("--- pb-discover ---\n");
 157
 158         /* we look for closed sockets when we write, so ignore SIGPIPE */
 159         signal(SIGPIPE, SIG_IGN);
 160
 161         signal(SIGINT, sigint_handler);
 162
 163         waitset = waitset_create(NULL);
 164
 165         server = discover_server_init(waitset);
 166         if (!server)
 167                 return EXIT_FAILURE;
 168
 169         procset = process_init(server, waitset, opts.dry_run == opt_yes);
 170         if (!procset)
 171                 return EXIT_FAILURE;
 172
 173         platform_init(NULL);
 174         if (opts.no_autoboot == opt_yes)
 175                 config_set_autoboot(false);
 176
 177         system_info_init(server);
 178
 179         handler = device_handler_init(server, waitset, opts.dry_run == opt_yes);
 180         if (!handler)
 181                 return EXIT_FAILURE;
 182
 183         discover_server_set_device_source(server, handler);
 184
 185         /* init our device sources: udev, network and user events */
 186         udev = udev_init(waitset, handler);
 187         if (!udev)
 188                 return EXIT_FAILURE;
 189
 190         network = network_init(handler, waitset, opts.dry_run == opt_yes);
 191         if (!network)
 192                 return EXIT_FAILURE;
 193
 194         uev = user_event_init(waitset, handler);
 195         if (!uev)
 196                 return EXIT_FAILURE;
 197
 198         for (running = 1; running;) {
 199                 if (waiter_poll(waitset))
 200                         break;
 201         }
 202
 203         network_shutdown(network);
 204         device_handler_destroy(handler);
 205         user_event_destroy(uev);
 206         udev_destroy(udev);
 207         discover_server_destroy(server);
 208         platform_fini();
 209         talloc_free(waitset);
 210
 211         pb_log("--- end ---\n");
 212
 213         if (log != stderr)
 214                 fclose(log);
 215
 216         return EXIT_SUCCESS;
 217 }