# trexist.c

    #include "common.h"
    #include <stdlib.h>
    #include <limits.h>

    static void usage (void)
    {
      fprintf(stderr, "trexist <trackid>\n");
    }

    int main (int argc, char **argv)
    {
      LIBMTP_mtpdevice_t *device;
      uint32_t id;
      char *endptr;

      fprintf(stdout, "libmtp version: " LIBMTP_VERSION_STRING "\n\n");

      // We need track ID
      if ( argc != 2 ) {
        usage();
        return 1;
      }

      // Sanity check song ID
      id = strtoul(argv[1], &endptr, 10);
      if ( *endptr != 0 ) {
        fprintf(stderr, "illegal value %s\n", argv[1]);
        return 1;
      } else if ( ! id ) {
        fprintf(stderr, "bad song id %u\n", id);
        return 1;
      }

      LIBMTP_Init();
      device = LIBMTP_Get_First_Device();
      if (device == NULL) {
        printf("No devices. Connect/replug device and try again.\n");
        exit (0);
      }

      printf("%s\n", LIBMTP_Track_Exists(device, id) ? "Yes" : "No");

      LIBMTP_Release_Device(device);
      printf("OK.\n");
      exit (0);
    }