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
  16 #include "udev.h"
  17 #include "user-event.h"
  18 #include "discover-server.h"
  19 #include "device-handler.h"
  20
  21 static void print_version(void)
  22 {
  23         printf("pb-discover (" PACKAGE_NAME ") " PACKAGE_VERSION "\n");
  24 }
  25
  26 static void print_usage(void)
  27 {
  28         print_version();
  29         printf(
  30 "Usage: pb-discover [-h, --help] [-l, --log log-file] [-V, --version]\n");
  31 }
  32
  33 /**
  34  * enum opt_value - Tri-state options variables.
  35  */
  36
  37 enum opt_value {opt_undef = 0, opt_yes, opt_no};
  38
  39 /**
  40  * struct opts - Values from command line options.
  41  */
  42
  43 struct opts {
  44         enum opt_value show_help;
  45         const char *log_file;
  46         enum opt_value show_version;
  47         enum opt_value dry_run;
  48 };
  49
  50 /**
  51  * opts_parse - Parse the command line options.
  52  */
  53
  54 static int opts_parse(struct opts *opts, int argc, char *argv[])
  55 {
  56         static const struct option long_options[] = {
  57                 {"help",           no_argument,       NULL, 'h'},
  58                 {"log",            required_argument, NULL, 'l'},
  59                 {"dry-run",        no_argument,       NULL, 'n'},
  60                 {"version",        no_argument,       NULL, 'V'},
  61                 { NULL, 0, NULL, 0},
  62         };
  63         static const char short_options[] = "hl:nV";
  64         static const struct opts default_values = {
  65                 .log_file = "/var/log/petitboot/pb-discover.log",
  66                 .dry_run = opt_no,
  67         };
  68
  69         *opts = default_values;
  70
  71         while (1) {
  72                 int c = getopt_long(argc, argv, short_options, long_options,
  73                         NULL);
  74
  75                 if (c == EOF)
  76                         break;
  77
  78                 switch (c) {
  79                 case 'h':
  80                         opts->show_help = opt_yes;
  81                         break;
  82                 case 'l':
  83                         opts->log_file = optarg;
  84                         break;
  85                 case 'n':
  86                         opts->dry_run = opt_yes;
  87                         break;
  88                 case 'V':
  89                         opts->show_version = opt_yes;
  90                         break;
  91                 default:
  92                         opts->show_help = opt_yes;
  93                         return -1;
  94                 }
  95         }
  96
  97         return optind != argc;
  98 }
  99
 100 static int running;
 101
 102 static void sigint_handler(int __attribute__((unused)) signum)
 103 {
 104         running = 0;
 105 }
 106
 107 int main(int argc, char *argv[])
 108 {
 109         struct device_handler *handler;
 110         struct discover_server *server;
 111         struct waitset *waitset;
 112         struct opts opts;
 113         struct pb_udev *udev;
 114         struct user_event *uev;
 115
 116         if (opts_parse(&opts, argc, argv)) {
 117                 print_usage();
 118                 return EXIT_FAILURE;
 119         }
 120
 121         if (opts.show_help == opt_yes) {
 122                 print_usage();
 123                 return EXIT_SUCCESS;
 124         }
 125
 126         if (opts.show_version == opt_yes) {
 127                 print_version();
 128                 return EXIT_SUCCESS;
 129         }
 130
 131         if (strcmp(opts.log_file, "-")) {
 132                 FILE *log = fopen(opts.log_file, "a");
 133
 134                 assert(log);
 135                 pb_log_set_stream(log);
 136         } else
 137                 pb_log_set_stream(stderr);
 138
 139 #if defined(DEBUG)
 140         pb_log_always_flush(1);
 141 #endif
 142         pb_log("--- pb-discover ---\n");
 143
 144         /* we look for closed sockets when we write, so ignore SIGPIPE */
 145         signal(SIGPIPE, SIG_IGN);
 146
 147         signal(SIGINT, sigint_handler);
 148
 149         config_init(NULL);
 150
 151         waitset = waitset_create(NULL);
 152
 153         server = discover_server_init(waitset);
 154         if (!server)
 155                 return EXIT_FAILURE;
 156
 157         handler = device_handler_init(server, waitset, opts.dry_run == opt_yes);
 158         if (!handler)
 159                 return EXIT_FAILURE;
 160
 161         discover_server_set_device_source(server, handler);
 162
 163         udev = udev_init(waitset, handler);
 164         if (!udev)
 165                 return EXIT_FAILURE;
 166
 167         uev = user_event_init(waitset, handler);
 168         if (!uev)
 169                 return EXIT_FAILURE;
 170
 171         user_event_trigger(uev);
 172
 173         for (running = 1; running;) {
 174                 if (waiter_poll(waitset))
 175                         break;
 176         }
 177
 178         device_handler_destroy(handler);
 179         waitset_destroy(waitset);
 180         udev_destroy(udev);
 181         config_fini();
 182
 183         pb_log("--- end ---\n");
 184
 185         return EXIT_SUCCESS;
 186 }