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