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, --verbose] [-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         enum opt_value verbose;
  52 };
  53
  54 /**
  55  * opts_parse - Parse the command line options.
  56  */
  57
  58 static int opts_parse(struct opts *opts, int argc, char *argv[])
  59 {
  60         static const struct option long_options[] = {
  61                 {"no-autoboot",    no_argument,       NULL, 'a'},
  62                 {"help",           no_argument,       NULL, 'h'},
  63                 {"log",            required_argument, NULL, 'l'},
  64                 {"dry-run",        no_argument,       NULL, 'n'},
  65                 {"verbose",        no_argument,       NULL, 'v'},
  66                 {"version",        no_argument,       NULL, 'V'},
  67                 { NULL, 0, NULL, 0},
  68         };
  69         static const char short_options[] = "ahl:nvV";
  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                 .verbose = opt_no,
  75         };
  76
  77         *opts = default_values;
  78
  79         while (1) {
  80                 int c = getopt_long(argc, argv, short_options, long_options,
  81                         NULL);
  82
  83                 if (c == EOF)
  84                         break;
  85
  86                 switch (c) {
  87                 case 'a':
  88                         opts->no_autoboot = opt_yes;
  89                         break;
  90                 case 'h':
  91                         opts->show_help = opt_yes;
  92                         break;
  93                 case 'l':
  94                         opts->log_file = optarg;
  95                         break;
  96                 case 'n':
  97                         opts->dry_run = opt_yes;
  98                         break;
  99                 case 'v':
 100                         opts->verbose = opt_yes;
 101                         break;
 102                 case 'V':
 103                         opts->show_version = opt_yes;
 104                         break;
 105                 default:
 106                         opts->show_help = opt_yes;
 107                         return -1;
 108                 }
 109         }
 110
 111         return optind != argc;
 112 }
 113
 114 static int running;
 115
 116 static void sigint_handler(int __attribute__((unused)) signum)
 117 {
 118         running = 0;
 119 }
 120
 121 int main(int argc, char *argv[])
 122 {
 123         struct device_handler *handler;
 124         struct discover_server *server;
 125         struct waitset *waitset;
 126         struct procset *procset;
 127         struct opts opts;
 128         FILE *log;
 129
 130         if (opts_parse(&opts, argc, argv)) {
 131                 print_usage();
 132                 return EXIT_FAILURE;
 133         }
 134
 135         if (opts.show_help == opt_yes) {
 136                 print_usage();
 137                 return EXIT_SUCCESS;
 138         }
 139
 140         if (opts.show_version == opt_yes) {
 141                 print_version();
 142                 return EXIT_SUCCESS;
 143         }
 144
 145         log = stderr;
 146         if (strcmp(opts.log_file, "-")) {
 147                 log = fopen(opts.log_file, "a");
 148                 if (!log) {
 149                         fprintf(stderr, "can't open log file %s, logging to "
 150                                         "stderr\n", opts.log_file);
 151                         log = stderr;
 152                 }
 153         }
 154         pb_log_init(log);
 155
 156         if (opts.verbose == opt_yes)
 157                 pb_log_set_debug(true);
 158
 159         pb_log("--- pb-discover ---\n");
 160
 161         /* we look for closed sockets when we write, so ignore SIGPIPE */
 162         signal(SIGPIPE, SIG_IGN);
 163
 164         signal(SIGINT, sigint_handler);
 165
 166         waitset = waitset_create(NULL);
 167
 168         server = discover_server_init(waitset);
 169         if (!server)
 170                 return EXIT_FAILURE;
 171
 172         procset = process_init(server, waitset, opts.dry_run == opt_yes);
 173         if (!procset)
 174                 return EXIT_FAILURE;
 175
 176         platform_init(NULL);
 177         if (opts.no_autoboot == opt_yes)
 178                 config_set_autoboot(false);
 179
 180         system_info_init(server);
 181
 182         handler = device_handler_init(server, waitset, opts.dry_run == opt_yes);
 183         if (!handler)
 184                 return EXIT_FAILURE;
 185
 186         discover_server_set_device_source(server, handler);
 187
 188         for (running = 1; running;) {
 189                 if (waiter_poll(waitset))
 190                         break;
 191         }
 192
 193         device_handler_destroy(handler);
 194         discover_server_destroy(server);
 195         platform_fini();
 196         talloc_free(waitset);
 197
 198         pb_log("--- end ---\n");
 199
 200         if (log != stderr)
 201                 fclose(log);
 202
 203         return EXIT_SUCCESS;
 204 }