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69 lines
1.5 KiB
69 lines
1.5 KiB
/* Set tai offset |
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* by: John Stultz <[email protected]> |
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* (C) Copyright Linaro 2013 |
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* Licensed under the GPLv2 |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <time.h> |
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#include <sys/time.h> |
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#include <sys/timex.h> |
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#include <string.h> |
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#include <signal.h> |
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#include <unistd.h> |
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#include "../kselftest.h" |
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int set_tai(int offset) |
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{ |
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struct timex tx; |
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memset(&tx, 0, sizeof(tx)); |
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tx.modes = ADJ_TAI; |
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tx.constant = offset; |
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return adjtimex(&tx); |
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} |
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int get_tai(void) |
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{ |
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struct timex tx; |
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memset(&tx, 0, sizeof(tx)); |
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adjtimex(&tx); |
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return tx.tai; |
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} |
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int main(int argc, char **argv) |
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{ |
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int i, ret; |
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ret = get_tai(); |
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printf("tai offset started at %i\n", ret); |
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printf("Checking tai offsets can be properly set: "); |
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fflush(stdout); |
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for (i = 1; i <= 60; i++) { |
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ret = set_tai(i); |
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ret = get_tai(); |
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if (ret != i) { |
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printf("[FAILED] expected: %i got %i\n", i, ret); |
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return ksft_exit_fail(); |
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} |
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} |
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printf("[OK]\n"); |
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return ksft_exit_pass(); |
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}
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