# getusage.c

    #include "common.h"

    int main (int argc, char **argv)
    {
      njb_t njbs[NJB_MAX_DEVICES];
      njb_t *njb;
      int n, opt, debug;
      extern char *optarg;
      u_int64_t total;
      u_int64_t free;

      debug = 0;
      while ( (opt = getopt(argc, argv, "D:")) != -1 ) {
        switch (opt) {
        case 'D':
          debug = atoi(optarg);
          break;
        default:
          fprintf(stderr, "usage: handshake [ -D debuglvl ]\n");
          return 1;
        }
      }

      if ( debug ) NJB_Set_Debug(debug);

      if (NJB_Discover(njbs, 0, &n) == -1) {
        fprintf(stderr, "could not locate any jukeboxes\n");
        return 1;
      }

      if ( n == 0 ) {
        fprintf(stderr, "no NJB devices found\n");
        return 0;
      }

      njb = &njbs[0];

      if ( NJB_Open(njb) == -1 ) {
        NJB_Error_Dump(njb,stderr);
        return 1;
      }

      if (NJB_Get_Disk_Usage(njb, &total, &free) == -1) {
        NJB_Error_Dump(njb,stderr);
        return 1;
      }

    #ifdef __WIN32__
      printf("Total bytes on jukebox: %I64u (%I64u MB)\n",
             total, total/(1024*1024));
      printf("Free bytes on jukebox: %I64u (%I64u MB)\n",
             free, free/(1024*1024));
    #else
      printf("Total bytes on jukebox: %llu (%llu MB)\n",
             total, total/(1024*1024));
      printf("Free bytes on jukebox: %llu (%llu MB)\n",
             free, free/(1024*1024));
    #endif

      NJB_Close(njb);

      return 0;
    }