projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3a92a15f JS |
1 | /* Set tai offset |
| 2 | * by: John Stultz <john.stultz@linaro.org> | |
| 3 | * (C) Copyright Linaro 2013 | |
| 4 | * Licensed under the GPLv2 | |
| 5 | * | |
| 6 | * This program is free software: you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation, either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 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 | #ifdef KTEST | |
| 27 | #include "../kselftest.h" | |
| 28 | #else | |
| 29 | static inline int ksft_exit_pass(void) | |
| 30 | { | |
| 31 | exit(0); | |
| 32 | } | |
| 33 | static inline int ksft_exit_fail(void) | |
| 34 | { | |
| 35 | exit(1); | |
| 36 | } | |
| 37 | #endif | |
| 38 | ||
| 39 | int set_tai(int offset) | |
| 40 | { | |
| 41 | struct timex tx; | |
| 42 | ||
| 43 | memset(&tx, 0, sizeof(tx)); | |
| 44 | ||
| 45 | tx.modes = ADJ_TAI; | |
| 46 | tx.constant = offset; | |
| 47 | ||
| 48 | return adjtimex(&tx); | |
| 49 | } | |
| 50 | ||
| 51 | int get_tai(void) | |
| 52 | { | |
| 53 | struct timex tx; | |
| 54 | ||
| 55 | memset(&tx, 0, sizeof(tx)); | |
| 56 | ||
| 57 | adjtimex(&tx); | |
| 58 | return tx.tai; | |
| 59 | } | |
| 60 | ||
| 61 | int main(int argc, char **argv) | |
| 62 | { | |
| 63 | int i, ret; | |
| 64 | ||
| 65 | ret = get_tai(); | |
| 66 | printf("tai offset started at %i\n", ret); | |
| 67 | ||
| 68 | printf("Checking tai offsets can be properly set: "); | |
| 69 | for (i = 1; i <= 60; i++) { | |
| 70 | ret = set_tai(i); | |
| 71 | ret = get_tai(); | |
| 72 | if (ret != i) { | |
| 73 | printf("[FAILED] expected: %i got %i\n", i, ret); | |
| 74 | return ksft_exit_fail(); | |
| 75 | } | |
| 76 | } | |
| 77 | printf("[OK]\n"); | |
| 78 | return ksft_exit_pass(); | |
| 79 | } |