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[BZ #2821]

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* time/mktime.c (guess_time_tm): Fix overflow detection.
	* time/Makefile (tests): Add bug-mktime1.
	* time/bug-mktime1.c: New file.
This commit is contained in:
Ulrich Drepper 2006-09-09 16:56:29 +00:00
parent eaa51b472c
commit 41aba3d764
4 changed files with 29 additions and 6 deletions
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5
ChangeLog
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@ -1,5 +1,10 @@
2006-09-09 Ulrich Drepper <drepper@redhat.com>
[BZ #2821]
* time/mktime.c (guess_time_tm): Fix overflow detection.
* time/Makefile (tests): Add bug-mktime1.
* time/bug-mktime1.c: New file.
[BZ #3189, #3188]
* misc/sys/mman.h (remap_file_pages): Make available for _GNU_SOURCE.
(mremap): Likewise.

2
time/Makefile
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@ -35,7 +35,7 @@ distribute := datemsk
tests := test_time clocktest tst-posixtz tst-strptime tst_wcsftime \
tst-getdate tst-mktime tst-mktime2 tst-ftime_l tst-strftime \
tst-mktime3 tst-strptime2 bug-asctime bug-asctime_r
tst-mktime3 tst-strptime2 bug-asctime bug-asctime_r bug-mktime1
include ../Rules

17
time/bug-mktime1.c Normal file
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@ -0,0 +1,17 @@
#include <stdio.h>
#include <time.h>
static int
do_test (void)
{
struct tm t2 = { 0, 0, 0, 1, 1, 2050 - 1900, 1, 1, 1 };
time_t tt2 = mktime (&t2);
printf ("%ld\n", (long int) tt2);
if (sizeof (time_t) == 4 && tt2 != -1)
return 1;
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"

11
time/mktime.c
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@ -1,7 +1,7 @@
/* Convert a `struct tm' to a time_t value.
Copyright (C) 1993-1999, 2002-2004, 2005 Free Software Foundation, Inc.
Copyright (C) 1993-1999, 2002-2005, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Paul Eggert (eggert@twinsun.com).
Contributed by Paul Eggert <eggert@twinsun.com>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@ -216,10 +216,11 @@ guess_time_tm (long int year, long int yday, int hour, int min, int sec,
/* Overflow occurred one way or another. Return the nearest result
that is actually in range, except don't report a zero difference
if the actual difference is nonzero, as that would cause a false
match. */
match; and don't oscillate between two values, as that would
confuse the spring-forward gap detector. */
return (*t < TIME_T_MIDPOINT
? TIME_T_MIN + (*t == TIME_T_MIN)
: TIME_T_MAX - (*t == TIME_T_MAX));
? (*t <= TIME_T_MIN + 1 ? *t + 1 : TIME_T_MIN)
: (TIME_T_MAX - 1 <= *t ? *t - 1 : TIME_T_MAX));
}
/* Use CONVERT to convert *T to a broken down time in *TP.