From patchwork Thu Jan 26 13:38:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Schwab X-Patchwork-Id: 63734 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id C28BA3858D38 for ; Thu, 26 Jan 2023 13:38:27 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C28BA3858D38 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1674740307; bh=HDaZT1QoVz9FuS07G/riTN8g6bXME8JxwFPt0vndfow=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=ImLBMRNbstE3euNAnOyl6d57MOmCxgw5JXdHZtKXpewnqqjikSKdtM/TaYO6PhkXs NVYqkuh9Q9xmtRmJbL6rR3YGGJN9RZFJhbHyNmm3J8zAko6QE2tLNnEQvbiJmmq+eh UtljClqAKC6DuXdz4VmmWX6z3D9fdWlohg16MJ4A= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by sourceware.org (Postfix) with ESMTPS id 9EAA13858D28 for ; Thu, 26 Jan 2023 13:38:06 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 9EAA13858D28 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id A5A2821C48 for ; Thu, 26 Jan 2023 13:38:05 +0000 (UTC) Received: from hawking.suse.de (unknown [10.168.4.11]) by relay2.suse.de (Postfix) with ESMTP id A15FA2C141 for ; Thu, 26 Jan 2023 13:38:05 +0000 (UTC) Received: by hawking.suse.de (Postfix, from userid 17005) id 55D5544384A; Thu, 26 Jan 2023 14:38:05 +0100 (CET) To: libc-alpha@sourceware.org Subject: [PATCH] Use 64-bit time_t interfaces in strftime and strptime (bug 30053) X-Yow: Not SENSUOUS... only ``FROLICSOME''... and in need of DENTAL WORK... in PAIN!!! Date: Thu, 26 Jan 2023 14:38:05 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 X-Spam-Status: No, score=-9.1 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Andreas Schwab via Libc-alpha From: Andreas Schwab Reply-To: Andreas Schwab Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" Both functions use time_t only internally, so the ABI is not affected. --- time/Makefile | 3 ++- time/strftime_l.c | 4 ++++ time/strptime_l.c | 4 +++- time/tst-y2038-time64.c | 1 + time/tst-y2038.c | 52 +++++++++++++++++++++++++++++++++++++++++ 5 files changed, 62 insertions(+), 2 deletions(-) create mode 100644 time/tst-y2038-time64.c create mode 100644 time/tst-y2038.c diff --git a/time/Makefile b/time/Makefile index d86f2105c5..8b2e1d2398 100644 --- a/time/Makefile +++ b/time/Makefile @@ -50,7 +50,7 @@ tests := test_time clocktest tst-posixtz tst-strptime tst_wcsftime \ tst-clock tst-clock2 tst-clock_nanosleep tst-cpuclock1 \ tst-adjtime tst-ctime tst-difftime tst-mktime4 tst-clock_settime \ tst-settimeofday tst-itimer tst-gmtime tst-timegm \ - tst-timespec_get tst-timespec_getres + tst-timespec_get tst-timespec_getres tst-y2038 tests-time64 := \ tst-adjtime-time64 \ @@ -68,6 +68,7 @@ tests-time64 := \ tst-timegm-time64 \ tst-timespec_get-time64 \ tst-timespec_getres-time64 \ + tst-y2038-time64 \ tst-y2039-time64 include ../Rules diff --git a/time/strftime_l.c b/time/strftime_l.c index e09561c39c..402c6c4111 100644 --- a/time/strftime_l.c +++ b/time/strftime_l.c @@ -159,6 +159,10 @@ extern char *tzname[]; #ifdef _LIBC # define tzname __tzname # define tzset __tzset + +# define time_t __time64_t +# define __gmtime_r(t, tp) __gmtime64_r (t, tp) +# define mktime(tp) __mktime64 (tp) #endif #if !HAVE_TM_GMTOFF diff --git a/time/strptime_l.c b/time/strptime_l.c index 80fd705b8d..85c3249fcc 100644 --- a/time/strptime_l.c +++ b/time/strptime_l.c @@ -30,8 +30,10 @@ #ifdef _LIBC # define HAVE_LOCALTIME_R 0 # include "../locale/localeinfo.h" -#endif +# define time_t __time64_t +# define __localtime_r(t, tp) __localtime64_r (t, tp) +#endif #if ! HAVE_LOCALTIME_R && ! defined localtime_r # ifdef _LIBC diff --git a/time/tst-y2038-time64.c b/time/tst-y2038-time64.c new file mode 100644 index 0000000000..d6482b0be9 --- /dev/null +++ b/time/tst-y2038-time64.c @@ -0,0 +1 @@ +#include "tst-y2038.c" diff --git a/time/tst-y2038.c b/time/tst-y2038.c new file mode 100644 index 0000000000..659716d0fa --- /dev/null +++ b/time/tst-y2038.c @@ -0,0 +1,52 @@ +/* Test strftime and strptime after 2038-01-19 03:14:07 UTC (bug 30053). + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include +#include +#include + +static int +do_test (void) +{ + TEST_VERIFY_EXIT (setenv ("TZ", "UTC0", 1) == 0); + tzset (); + if (sizeof (time_t) > 4) + { + time_t wrap = (time_t) 2147483648LL; + char buf[80]; + struct tm *tm = gmtime (&wrap); + TEST_VERIFY_EXIT (tm != NULL); + TEST_VERIFY_EXIT (strftime (buf, sizeof buf, "%s", tm) > 0); + puts (buf); + TEST_VERIFY (strcmp (buf, "2147483648") == 0); + + struct tm tm2; + char *p = strptime (buf, "%s", &tm2); + TEST_VERIFY_EXIT (p != NULL && *p == '\0'); + time_t t = mktime (&tm2); + printf ("%lld\n", (long long) t); + TEST_VERIFY (t == wrap); + } + else + FAIL_UNSUPPORTED ("32-bit time_t"); + return 0; +} + +#include