/* 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>
|
#include "../kselftest.h"
|
|
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: ");
|
fflush(stdout);
|
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: ");
|
fflush(stdout);
|
|
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();
|
}
|
