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Commit 1a77e2bd authored by John Stultz's avatar John Stultz Committed by Shuah Khan
Browse files

kselftests: timers: Add set-tz test case 



Mika Westerberg reported a erroneous change in the error
checking of settimeofday, so I wanted to add a test to ensure
we don't trip over this again.

Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Baolin Wang <baolin.wang@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
Signed-off-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
parent 1a695a90

tools/testing/selftests/timers/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -10,7 +10,7 @@ TEST_PROGS = posix_timers nanosleep nsleep-lat set-timer-lat mqueue-lat \ 


TEST_PROGS_EXTENDED = alarmtimer-suspend valid-adjtimex adjtick change_skew \

		      skew_consistency clocksource-switch leap-a-day \

		      leapcrash set-tai set-2038

		      leapcrash set-tai set-2038 set-tz



bins = $(TEST_PROGS) $(TEST_PROGS_EXTENDED)
@@ -30,6 +30,7 @@ run_destructive_tests: run_tests 
	./clocksource-switch

	./leap-a-day -s -i 10

	./leapcrash

	./set-tz

	./set-tai

	./set-2038

tools/testing/selftests/timers/set-tz.c

0 → 100644
+119 −0
Original line number Diff line number Diff line 
/* Set tz value

 *              by: John Stultz <john.stultz@linaro.org>

 *              (C) Copyright Linaro 2016

 *              Licensed under the GPLv2

 *

 *   This program is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation, either version 2 of the License, or

 *   (at your option) any later version.

 *

 *   This program 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 General Public License for more details.

 */





#include <stdio.h>

#include <stdlib.h>

#include <time.h>

#include <sys/time.h>

#include <sys/timex.h>

#include <string.h>

#include <signal.h>

#include <unistd.h>

#ifdef KTEST

#include "../kselftest.h"

#else

static inline int ksft_exit_pass(void)

{

	exit(0);

}

static inline int ksft_exit_fail(void)

{

	exit(1);

}

#endif



int set_tz(int min, int dst)

{

	struct timezone tz;



	tz.tz_minuteswest = min;

	tz.tz_dsttime = dst;



	return settimeofday(0, &tz);

}



int get_tz_min(void)

{

	struct timezone tz;

	struct timeval tv;



	memset(&tz, 0, sizeof(tz));

	gettimeofday(&tv, &tz);

	return tz.tz_minuteswest;

}



int get_tz_dst(void)

{

	struct timezone tz;

	struct timeval tv;



	memset(&tz, 0, sizeof(tz));

	gettimeofday(&tv, &tz);

	return tz.tz_dsttime;

}



int main(int argc, char **argv)

{

	int i, ret;

	int min, dst;



	min = get_tz_min();

	dst = get_tz_dst();

	printf("tz_minuteswest started at %i, dst at %i\n", min, dst);



	printf("Checking tz_minuteswest can be properly set: ");

	for (i = -15*60; i < 15*60; i += 30) {

		ret = set_tz(i, dst);

		ret = get_tz_min();

		if (ret != i) {

			printf("[FAILED] expected: %i got %i\n", i, ret);

			goto err;

		}

	}

	printf("[OK]\n");



	printf("Checking invalid tz_minuteswest values are caught: ");



	if (!set_tz(-15*60-1, dst)) {

		printf("[FAILED] %i didn't return failure!\n", -15*60-1);

		goto err;

	}



	if (!set_tz(15*60+1, dst)) {

		printf("[FAILED] %i didn't return failure!\n", 15*60+1);

		goto err;

	}



	if (!set_tz(-24*60, dst)) {

		printf("[FAILED] %i didn't return failure!\n", -24*60);

		goto err;

	}



	if (!set_tz(24*60, dst)) {

		printf("[FAILED] %i didn't return failure!\n", 24*60);

		goto err;

	}



	printf("[OK]\n");



	set_tz(min, dst);

	return ksft_exit_pass();



err:

	set_tz(min, dst);

	return ksft_exit_fail();

}