Merge "crasher: add option to wait for input before crashing."

{

    fprintf(stderr, "%s: init pid=%d tid=%d\n", __progname, getpid(), gettid());

    if (!strncmp(arg, "exhaustfd-", strlen("exhaustfd-"))) {

    if (!strncmp(arg, "wait-", strlen("wait-"))) {

      char buf[1];

      TEMP_FAILURE_RETRY(read(STDIN_FILENO, buf, sizeof(buf)));

      return do_action(arg + strlen("wait-"));

    } else if (!strncmp(arg, "exhaustfd-", strlen("exhaustfd-"))) {

      errno = 0;

      while (errno != EMFILE) {

        open("/dev/null", O_RDONLY);

    fprintf(stderr, "on the process' main thread.\n");

    fprintf(stderr, "prefix any of the above with 'exhaustfd-' to exhaust\n");

    fprintf(stderr, "all available file descriptors before crashing.\n");

    fprintf(stderr, "prefix any of the above with 'wait-' to wait until input is received on stdin\n");

    return EXIT_SUCCESS;

}