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/* Test 69. clock_getres(), clock_gettime(), clock_settime(), adjtime().
*
* Note, any type of ntpd or software that calls adjtime() or settimeofday()
* should be disabled while running this test. This test takes ~40s to run.
*/
#include <time.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#define TRIALS 100
int max_error = 4;
#include "common.h"
#ifndef DEBUG
#define DEBUG 0
#endif
int subtest = 1;
int main(void);
void quit(void);
static void test_clock_getres(void);
static void test_clock_gettime(void);
static void test_clock_settime(void);
static void test_adjtime(void);
static void show_timespec(char *msg, struct timespec *ts);
static void test_clock_getres(void)
{
struct timespec res;
/* valid clock_id should succeed, invalid clock_id should fail */
if (clock_getres(CLOCK_REALTIME, &res) == -1) e(10);
if (res.tv_sec < 0 || res.tv_nsec < 0) e(11);
show_timespec("res(CLOCK_REALTIME)", &res);
if (clock_getres(CLOCK_MONOTONIC, &res) == -1) e(12);
if (res.tv_sec < 0 || res.tv_nsec < 0) e(13);
show_timespec("res(CLOCK_MONOTONIC)", &res);
if (clock_getres(-1, &res) == 0) e(14);
}
static void test_clock_gettime(void)
{
struct timespec ts, ts2;
/* valid clock_id should succeed, invalid clock_id should fail */
if (clock_gettime(CLOCK_REALTIME, &ts) == -1) e(21);
if (ts.tv_sec < 0 || ts.tv_nsec < 0) e(22);
show_timespec("time(CLOCK_REALTIME)", &ts);
sleep(2);
if (clock_gettime(CLOCK_REALTIME, &ts2) == -1) e(23);
if (ts2.tv_sec < 0 || ts2.tv_nsec < 0) e(24);
if (ts2.tv_sec <= ts.tv_sec) e(25);
if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1) e(26);
if (ts.tv_sec < 0 || ts.tv_nsec < 0) e(27);
show_timespec("time(CLOCK_MONOTONIC)", &ts);
sleep(2);
if (clock_gettime(CLOCK_MONOTONIC, &ts2) == -1) e(28);
if (ts2.tv_sec < 0 || ts2.tv_nsec < 0) e(29);
if (ts2.tv_sec <= ts.tv_sec) e(30);
if (clock_gettime(-1, &ts) == 0) e(31);
}
static void test_clock_settime(void)
{
struct timespec ts;
struct timespec ts2;
/* shouldn't be able to set MONOTONIC */
if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1) e(50);
if (clock_settime(CLOCK_MONOTONIC, &ts) == 0) e(51);
if (errno != EINVAL) e(52); /* reponse should be EINVAL */
/* set the time of REALTIME to that of MONOTONIC */
if (clock_settime(CLOCK_REALTIME, &ts) == -1) e(53);
ts.tv_sec += 600; /* time travel 10 minutes into the future */
if (clock_gettime(CLOCK_REALTIME, &ts2) == -1) e(54);
if (clock_settime(CLOCK_REALTIME, &ts) == -1) e(55);
if (clock_gettime(CLOCK_REALTIME, &ts) == -1) e(56);
/* get the value we set, if it's not about 10 minutes ahead, it failed */
if (ts.tv_sec - ts2.tv_sec < 500 ||
ts.tv_sec - ts2.tv_sec > 700) e(57);
/* back to current time - don't leave the system time 10 ahead */
if (clock_gettime(CLOCK_REALTIME, &ts) == -1) e(58);
ts.tv_sec -= 600;
if (clock_settime(CLOCK_REALTIME, &ts) == -1) e(59);
/* Test with an invalid clock */
if (clock_settime(-1, &ts) == 0) e(60);
}
static void test_adjtime(void)
{
struct timeval delta, olddelta;
struct timespec rt, mt;
/* set the realtime clock to the same value as the monotonic clock */
if (clock_gettime(CLOCK_MONOTONIC, &mt) == -1) e(65);
if (clock_settime(CLOCK_REALTIME, &mt) == -1) e(66);
delta.tv_sec = 7;
delta.tv_usec = 0;
if (adjtime(&delta, &olddelta) != 0) e(70); /* adjust +7 seconds */
sleep(15); /* should take 14 seconds to adjust the clock */
/* check that the 7 second adjustment puts us between 5 and 10 seconds
* ahead of the monotonic clock.
*/
if (clock_gettime(CLOCK_MONOTONIC, &mt) == -1) e(71);
if (clock_gettime(CLOCK_REALTIME, &rt) == -1) e(72);
show_timespec("Monotonic", &mt);
show_timespec("Realtime (+7)", &rt);
if (rt.tv_sec - 5 < mt.tv_sec || rt.tv_sec - 10 > mt.tv_sec) e(73);
delta.tv_sec = -7;
if (adjtime(&delta, &olddelta) != 0) e(73); /* adjust -7 seconds */
sleep(15); /* should take 14 seconds to adjust the clock */
/* check that the 7 second adjustment puts us close to even with
* the monotonic clock.
*/
if (clock_gettime(CLOCK_MONOTONIC, &mt) == -1) e(74);
if (clock_gettime(CLOCK_REALTIME, &rt) == -1) e(75);
show_timespec("Monotonic", &mt);
show_timespec("Realtime (-7)", &rt);
if (abs(rt.tv_sec - mt.tv_sec) > 5) e(76);
}
static void show_timespec(char *msg, struct timespec *ts)
{
#if DEBUG == 1
printf("[%s] tv_sec=%d tv_nsec=%ld\n", msg, ts->tv_sec, ts->tv_nsec);
#endif /* DEBUG == 1 */
}
int main(void)
{
start(69);
struct timespec starttime, endtime;
/* get test start time */
if (clock_gettime(CLOCK_MONOTONIC, &starttime) == -1) e(1);
test_clock_getres();
test_clock_gettime();
test_clock_settime();
test_adjtime();
/* get test end time */
if (clock_gettime(CLOCK_MONOTONIC, &endtime) == -1) e(2);
/* we shouldn't have gone backwards in time during this test */
if ((starttime.tv_sec > endtime.tv_sec) ||
(starttime.tv_sec == endtime.tv_sec &&
starttime.tv_nsec > endtime.tv_nsec)) e(3);
quit();
return(-1); /* impossible */
}
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