1 /*
2 * Copyright (c) 2002, Intel Corporation. All rights reserved.
3 * Created by: julie.n.fleischer REMOVE-THIS AT intel DOT com
4 * This file is licensed under the GPL license. For the full content
5 * of this license, see the COPYING file at the top level of this
6 * source tree.
7 *
8 * Test that the clock time can be set to a large number, Y2K
9 * critical dates, and times around daylight savings.
10 *
11 * Test for CLOCK_REALTIME. (N/A for CLOCK_MONOTONIC as that clock
12 * cannot be set.)
13 */
14 #include <stdio.h>
15 #include <time.h>
16 #include <stdint.h>
17 #include "posixtest.h"
18
19 #define NUMTESTS 5
20
21 #define ACCEPTABLESECDELTA 0
22 #define ACCEPTABLENSECDELTA 5000000
23
24 static int testtimes[NUMTESTS][2] = {
25 {INT32_MAX, 999999999}, // large number
26 {946713600, 999999999}, // Y2K - Jan 1, 2000
27 {951811200, 999999999}, // Y2K - Feb 29, 2000
28 {1078041600, 999999999}, // Y2K - Feb 29, 2004
29 {1049623200, 999999999}, // daylight savings 2003
30 };
31
main(int argc,char * argv[])32 int main(int argc, char *argv[])
33 {
34 struct timespec tpset, tpget, tsreset;
35 int secdelta, nsecdelta;
36 int failure = 0;
37 int i;
38
39 if (clock_gettime(CLOCK_REALTIME, &tsreset) != 0) {
40 perror("clock_gettime() did not return success\n");
41 return PTS_UNRESOLVED;
42 }
43
44 for (i = 0; i < NUMTESTS; i++) {
45 tpset.tv_sec = testtimes[i][0];
46 tpset.tv_nsec = testtimes[i][1];
47 #ifdef DEBUG
48 printf("Test: %ds %dns\n", testtimes[i][0], testtimes[i][1]);
49 #endif
50 if (clock_settime(CLOCK_REALTIME, &tpset) == 0) {
51 if (clock_gettime(CLOCK_REALTIME, &tpget) == -1) {
52 printf("Error in clock_gettime()\n");
53 return PTS_UNRESOLVED;
54 }
55 secdelta = tpget.tv_sec - tpset.tv_sec;
56 nsecdelta = tpget.tv_nsec - tpset.tv_nsec;
57 if (nsecdelta < 0) {
58 nsecdelta = nsecdelta + 1000000000;
59 secdelta = secdelta - 1;
60 }
61 #ifdef DEBUG
62 printf("Delta: %ds %dns\n", secdelta, nsecdelta);
63 #endif
64 if ((secdelta > ACCEPTABLESECDELTA) || (secdelta < 0)) {
65 printf("clock does not appear to be set\n");
66 failure = 1;
67 }
68 if ((nsecdelta > ACCEPTABLENSECDELTA) ||
69 (nsecdelta < 0)) {
70 printf("clock does not appear to be set\n");
71 failure = 1;
72 }
73 } else {
74 printf("clock_settime() failed\n");
75 return PTS_UNRESOLVED;
76 }
77
78 if (clock_settime(CLOCK_REALTIME, &tsreset) != 0) {
79 perror("clock_settime() did not return success\n");
80 return PTS_UNRESOLVED;
81 }
82 }
83
84 if (clock_settime(CLOCK_REALTIME, &tsreset) != 0) {
85 perror("clock_settime() did not return success\n");
86 return PTS_UNRESOLVED;
87 }
88
89 if (failure) {
90 printf("At least one test FAILED\n");
91 return PTS_FAIL;
92 }
93
94 printf("All tests PASSED\n");
95 return PTS_PASS;
96 }
97