…
> +++ b/tools/testing/selftests/net/tfo.c
> @@ -82,8 +82,10 @@ static void run_server(void)
…
> if (read(connfd, buf, 64) < 0)
> - perror("read()");
> - fprintf(outfile, "%d\n", opt);
> + error(1, errno, "read()");
> +
> + if (fprintf(outfile, "%d\n", opt) < 0)
> + error(1, errno, "fprintf()");
>
> fclose(outfile);
> close(connfd);
…Why was error detection omitted for close() calls here so far? https://pubs.opengroup.org/onlinepubs/9799919799/functions/fclose.html Regards, Markus

