From patchwork Thu Jun 8 10:16:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Sekletar X-Patchwork-Id: 13271889 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F1F7C7EE25 for ; Thu, 8 Jun 2023 10:17:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235067AbjFHKRp (ORCPT ); Thu, 8 Jun 2023 06:17:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235865AbjFHKRo (ORCPT ); Thu, 8 Jun 2023 06:17:44 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8019F2D48 for ; Thu, 8 Jun 2023 03:16:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1686219413; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=CkSBFkEaQ4x9rH0bVltqMnMT5xLInhrDlt72mpqM2uM=; b=I9eLixnDdWG76UH1zGyFZgDRWIwtkrI6lLfsqGUShGctJlOLo9cKc219XQZauZV0AEvcF8 e9LUyjaFjJE/JIMjbyiOrkakkKTkC2axuS1m4jOBHkEYIWzhXWLpPi/AbpPR4pJ/vvBsLL Tj+UBkGis5TPZn+nltfEuaLHVVs1tf0= Received: from mail-ej1-f72.google.com (mail-ej1-f72.google.com [209.85.218.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-306-2rYsaqU-PwOT2CZ-EnfP9g-1; Thu, 08 Jun 2023 06:16:52 -0400 X-MC-Unique: 2rYsaqU-PwOT2CZ-EnfP9g-1 Received: by mail-ej1-f72.google.com with SMTP id a640c23a62f3a-97463348446so66053866b.2 for ; Thu, 08 Jun 2023 03:16:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686219411; x=1688811411; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=CkSBFkEaQ4x9rH0bVltqMnMT5xLInhrDlt72mpqM2uM=; b=gTER7TIiVDVZ0ghjIOOAe25oxDroL6NZ6V+1EK2JPThpD0uP/0JlGTHykn127K5R5W Nv6LrpmRHATu3Cxjq2kGB78SML5ON2CecNbZ+bQVe0QZ50qfaD2FMC+IA3sk+1pDirPc P23tvogwLg9j8EBzdjiWvmhEkL+GvWviPdf0eaiKoVAADnV1V8Wwel9ZdvTcZTV3BWXb zjxo4QpEz67ZPFp+SNmmG/KPEkCHoD0Bms16f8ApHbCHmXHD4oVj65eTgKJOafHgYME2 sfs8owPod64tkvI6iT2Oo/N2MaWiKPT40M2xH32lNjumtuH10xBUzH04HRrz6oU9wEfh 3wAw== X-Gm-Message-State: AC+VfDx8YM9XGHvW8/ZjpROBnECcHTiuo5hhEAxit4OTAxOeFxgXNPBv GX2IOkv6SKQ5XUIoDPt/QIOfy5UL7INfApesSmISPPtGIwkdPnxxDg0JsgFCPrHVMXr0hse0huM xAqz8GZd1SuFxiVtE9K4Po7PEkqLw X-Received: by 2002:a17:907:72cc:b0:973:9494:4e5c with SMTP id du12-20020a17090772cc00b0097394944e5cmr7850378ejc.65.1686219411437; Thu, 08 Jun 2023 03:16:51 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ7x6MAb8Al9ZO5Rr9aBjQBOdF0IBf+DSr4m+9KOnoWcs8EgLyJWZmfwY8JRVpJ0lgZMIUV87A== X-Received: by 2002:a17:907:72cc:b0:973:9494:4e5c with SMTP id du12-20020a17090772cc00b0097394944e5cmr7850367ejc.65.1686219411248; Thu, 08 Jun 2023 03:16:51 -0700 (PDT) Received: from localhost.localdomain ([46.33.96.32]) by smtp.gmail.com with ESMTPSA id e20-20020a170906249400b00977da0f14ffsm506558ejb.171.2023.06.08.03.16.50 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 08 Jun 2023 03:16:50 -0700 (PDT) From: Michal Sekletar To: jirislaby@kernel.org Cc: arozansk@redhat.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, msekleta@redhat.com, shuah@kernel.org Subject: [PATCH v2 2/2] selftests: tty: add selftest for tty timestamp updates Date: Thu, 8 Jun 2023 12:16:16 +0200 Message-Id: <20230608101616.44152-2-msekleta@redhat.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230608101616.44152-1-msekleta@redhat.com> References: <20230608101616.44152-1-msekleta@redhat.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Signed-off-by: Michal Sekletar --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/tty/.gitignore | 2 + tools/testing/selftests/tty/Makefile | 5 ++ .../testing/selftests/tty/tty_tstamp_update.c | 88 +++++++++++++++++++ 4 files changed, 96 insertions(+) create mode 100644 tools/testing/selftests/tty/.gitignore create mode 100644 tools/testing/selftests/tty/Makefile create mode 100644 tools/testing/selftests/tty/tty_tstamp_update.c diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 90a62cf75..862f5f9a7 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -86,6 +86,7 @@ TARGETS += timers endif TARGETS += tmpfs TARGETS += tpm2 +TARGETS += tty TARGETS += user TARGETS += vDSO TARGETS += mm diff --git a/tools/testing/selftests/tty/.gitignore b/tools/testing/selftests/tty/.gitignore new file mode 100644 index 000000000..fe70462a4 --- /dev/null +++ b/tools/testing/selftests/tty/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +tty_tstamp_update diff --git a/tools/testing/selftests/tty/Makefile b/tools/testing/selftests/tty/Makefile new file mode 100644 index 000000000..50d7027b2 --- /dev/null +++ b/tools/testing/selftests/tty/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 +CFLAGS = -O2 -Wall +TEST_GEN_PROGS := tty_tstamp_update + +include ../lib.mk diff --git a/tools/testing/selftests/tty/tty_tstamp_update.c b/tools/testing/selftests/tty/tty_tstamp_update.c new file mode 100644 index 000000000..0ee97943d --- /dev/null +++ b/tools/testing/selftests/tty/tty_tstamp_update.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../kselftest.h" + +#define MIN_TTY_PATH_LEN 8 + +static bool tty_valid(char *tty) +{ + if (strlen(tty) < MIN_TTY_PATH_LEN) + return false; + + if (strncmp(tty, "/dev/tty", MIN_TTY_PATH_LEN) == 0 || + strncmp(tty, "/dev/pts", MIN_TTY_PATH_LEN) == 0) + return true; + + return false; +} + +static int write_dev_tty(void) +{ + FILE *f; + int r = 0; + + f = fopen("/dev/tty", "r+"); + if (!f) + return -errno; + + r = fprintf(f, "hello, world!\n"); + if (r != strlen("hello, world!\n")) + r = -EIO; + + fclose(f); + return r; +} + +int main(int argc, char **argv) +{ + int r; + char tty[PATH_MAX] = {}; + struct stat st1, st2; + + ksft_print_header(); + ksft_set_plan(1); + + r = readlink("/proc/self/fd/0", tty, PATH_MAX); + if (r < 0) + ksft_exit_fail_msg("readlink on /proc/self/fd/0 failed: %m\n"); + + if (!tty_valid(tty)) + ksft_exit_skip("invalid tty path '%s'\n", tty); + + r = stat(tty, &st1); + if (r < 0) + ksft_exit_fail_msg("stat failed on tty path '%s': %m\n", tty); + + /* We need to wait at least 8 seconds in order to observe timestamp change */ + /* https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fbf47635315ab308c9b58a1ea0906e711a9228de */ + sleep(10); + + r = write_dev_tty(); + if (r < 0) + ksft_exit_fail_msg("failed to write to /dev/tty: %s\n", + strerror(-r)); + + r = stat(tty, &st2); + if (r < 0) + ksft_exit_fail_msg("stat failed on tty path '%s': %m\n", tty); + + /* We wrote to the terminal so timestamps should have been updated */ + if (st1.st_atim.tv_sec == st2.st_atim.tv_sec && + st1.st_mtim.tv_sec == st2.st_mtim.tv_sec) { + ksft_test_result_fail("tty timestamps not updated\n"); + ksft_exit_fail(); + } + + ksft_test_result_pass( + "timestamps of terminal '%s' updated after write to /dev/tty\n", tty); + return EXIT_SUCCESS; +}