1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#include <stdio.h>
19#include <stdlib.h>
20#include <time.h>
21#include <sys/time.h>
22#include <sys/timex.h>
23#include <string.h>
24#include <signal.h>
25#include <unistd.h>
26#include "../kselftest.h"
27
28int set_tai(int offset)
29{
30 struct timex tx;
31
32 memset(&tx, 0, sizeof(tx));
33
34 tx.modes = ADJ_TAI;
35 tx.constant = offset;
36
37 return adjtimex(&tx);
38}
39
40int get_tai(void)
41{
42 struct timex tx;
43
44 memset(&tx, 0, sizeof(tx));
45
46 adjtimex(&tx);
47 return tx.tai;
48}
49
50int main(int argc, char **argv)
51{
52 int i, ret;
53
54 ret = get_tai();
55 printf("tai offset started at %i\n", ret);
56
57 printf("Checking tai offsets can be properly set: ");
58 fflush(stdout);
59 for (i = 1; i <= 60; i++) {
60 ret = set_tai(i);
61 ret = get_tai();
62 if (ret != i) {
63 printf("[FAILED] expected: %i got %i\n", i, ret);
64 return ksft_exit_fail();
65 }
66 }
67 printf("[OK]\n");
68 return ksft_exit_pass();
69}
70