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