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