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