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 <process/process.h>
  15 #include <talloc/talloc.h>
  16
  17 #include "discover-server.h"
  18 #include "device-handler.h"
  19 #include "sysinfo.h"
  20 #include "platform.h"
  21
  22 static void print_version(void)
  23 {
  24         printf("pb-discover (" PACKAGE_NAME ") " PACKAGE_VERSION "\n");
  25 }
  26
  27 static void print_usage(void)
  28 {
  29         print_version();
  30         printf(
  31 "Usage: pb-discover [-a, --no-autoboot] [-h, --help] [-l, --log log-file]\n"
  32 "                   [-n, --dry-run] [-V, --version]\n");
  33 }
  34
  35 /**
  36  * enum opt_value - Tri-state options variables.
  37  */
  38
  39 enum opt_value {opt_undef = 0, opt_yes, opt_no};
  40
  41 /**
  42  * struct opts - Values from command line options.
  43  */
  44
  45 struct opts {
  46         enum opt_value no_autoboot;
  47         enum opt_value show_help;
  48         const char *log_file;
  49         enum opt_value dry_run;
  50         enum opt_value show_version;
  51 };
  52
  53 /**
  54  * opts_parse - Parse the command line options.
  55  */
  56
  57 static int opts_parse(struct opts *opts, int argc, char *argv[])
  58 {
  59         static const struct option long_options[] = {
  60                 {"no-autoboot",    no_argument,       NULL, 'a'},
  61                 {"help",           no_argument,       NULL, 'h'},
  62                 {"log",            required_argument, NULL, 'l'},
  63                 {"dry-run",        no_argument,       NULL, 'n'},
  64                 {"version",        no_argument,       NULL, 'V'},
  65                 { NULL, 0, NULL, 0},
  66         };
  67         static const char short_options[] = "ahl:nV";
  68         static const struct opts default_values = {
  69                 .no_autoboot = opt_no,
  70                 .log_file = "/var/log/petitboot/pb-discover.log",
  71                 .dry_run = opt_no,
  72         };
  73
  74         *opts = default_values;
  75
  76         while (1) {
  77                 int c = getopt_long(argc, argv, short_options, long_options,
  78                         NULL);
  79
  80                 if (c == EOF)
  81                         break;
  82
  83                 switch (c) {
  84                 case 'a':
  85                         opts->no_autoboot = opt_yes;
  86                         break;
  87                 case 'h':
  88                         opts->show_help = opt_yes;
  89                         break;
  90                 case 'l':
  91                         opts->log_file = optarg;
  92                         break;
  93                 case 'n':
  94                         opts->dry_run = opt_yes;
  95                         break;
  96                 case 'V':
  97                         opts->show_version = opt_yes;
  98                         break;
  99                 default:
 100                         opts->show_help = opt_yes;
 101                         return -1;
 102                 }
 103         }
 104
 105         return optind != argc;
 106 }
 107
 108 static int running;
 109
 110 static void sigint_handler(int __attribute__((unused)) signum)
 111 {
 112         running = 0;
 113 }
 114
 115 int main(int argc, char *argv[])
 116 {
 117         struct device_handler *handler;
 118         struct discover_server *server;
 119         struct waitset *waitset;
 120         struct procset *procset;
 121         struct opts opts;
 122         FILE *log;
 123
 124         if (opts_parse(&opts, argc, argv)) {
 125                 print_usage();
 126                 return EXIT_FAILURE;
 127         }
 128
 129         if (opts.show_help == opt_yes) {
 130                 print_usage();
 131                 return EXIT_SUCCESS;
 132         }
 133
 134         if (opts.show_version == opt_yes) {
 135                 print_version();
 136                 return EXIT_SUCCESS;
 137         }
 138
 139         log = stderr;
 140         if (strcmp(opts.log_file, "-")) {
 141                 log = fopen(opts.log_file, "a");
 142                 if (!log) {
 143                         fprintf(stderr, "can't open log file %s, logging to "
 144                                         "stderr\n", opts.log_file);
 145                         log = stderr;
 146                 }
 147         }
 148         pb_log_init(log);
 149
 150         pb_log("--- pb-discover ---\n");
 151
 152         /* we look for closed sockets when we write, so ignore SIGPIPE */
 153         signal(SIGPIPE, SIG_IGN);
 154
 155         signal(SIGINT, sigint_handler);
 156
 157         waitset = waitset_create(NULL);
 158
 159         server = discover_server_init(waitset);
 160         if (!server)
 161                 return EXIT_FAILURE;
 162
 163         procset = process_init(server, waitset, opts.dry_run == opt_yes);
 164         if (!procset)
 165                 return EXIT_FAILURE;
 166
 167         platform_init(NULL);
 168         if (opts.no_autoboot == opt_yes)
 169                 config_set_autoboot(false);
 170
 171         system_info_init(server);
 172
 173         handler = device_handler_init(server, waitset, opts.dry_run == opt_yes);
 174         if (!handler)
 175                 return EXIT_FAILURE;
 176
 177         discover_server_set_device_source(server, handler);
 178
 179         for (running = 1; running;) {
 180                 if (waiter_poll(waitset))
 181                         break;
 182         }
 183
 184         device_handler_destroy(handler);
 185         discover_server_destroy(server);
 186         platform_fini();
 187         talloc_free(waitset);
 188
 189         pb_log("--- end ---\n");
 190
 191         if (log != stderr)
 192                 fclose(log);
 193
 194         return EXIT_SUCCESS;
 195 }