File localtime-2039.patch of Package glibc.15121
2018-05-18 Joseph Myers <joseph@codesourcery.com>
[BZ #22639]
* time/tzset.c (SECSPERDAY): Cast to time_t.
* time/tst-y2039.c: New file.
* time/Makefile (tests): Add tst-y2039.
Index: glibc-2.26/time/Makefile
===================================================================
--- glibc-2.26.orig/time/Makefile
+++ glibc-2.26/time/Makefile
@@ -43,7 +43,7 @@ tests := test_time clocktest tst-posixtz
tst-getdate tst-mktime tst-mktime2 tst-ftime_l tst-strftime \
tst-mktime3 tst-strptime2 bug-asctime bug-asctime_r bug-mktime1 \
tst-strptime3 bug-getdate1 tst-strptime-whitespace tst-ftime \
- tst-tzname
+ tst-tzname tst-y2039
include ../Rules
Index: glibc-2.26/time/tst-y2039.c
===================================================================
--- /dev/null
+++ glibc-2.26/time/tst-y2039.c
@@ -0,0 +1,46 @@
+/* Test for localtime bug in year 2039 (bug 22639).
+ Copyright (C) 2017-2018 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <time.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+ TEST_VERIFY_EXIT (setenv ("TZ", "PST8PDT,M3.2.0,M11.1.0", 1) == 0);
+ tzset ();
+ if (sizeof (time_t) > 4)
+ {
+ time_t ouch = (time_t) 2187810000LL;
+ char buf[500];
+ struct tm *tm = localtime (&ouch);
+ TEST_VERIFY_EXIT (tm != NULL);
+ TEST_VERIFY_EXIT (strftime (buf, sizeof buf, "%Y-%m-%d %H:%M:%S %Z", tm)
+ > 0);
+ puts (buf);
+ TEST_VERIFY (strcmp (buf, "2039-04-30 14:00:00 PDT") == 0);
+ }
+ else
+ FAIL_UNSUPPORTED ("32-bit time_t");
+ return 0;
+}
+
+#include <support/test-driver.c>
Index: glibc-2.26/time/tzset.c
===================================================================
--- glibc-2.26.orig/time/tzset.c
+++ glibc-2.26/time/tzset.c
@@ -27,7 +27,7 @@
#include <timezone/tzfile.h>
-#define SECSPERDAY 86400
+#define SECSPERDAY ((time_t) 86400)
char *__tzname[2] = { (char *) "GMT", (char *) "GMT" };
int __daylight = 0;