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57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
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/* Test for ntp_gettime.
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <time.h>
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#include <stdlib.h>
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#include <sys/timex.h>
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#include <support/check.h>
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#include <support/xtime.h>
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#ifndef NTP_GETTIME_SYSCALL
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# define NTP_GETTIME_SYSCALL ntp_gettime
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#endif
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#define STR(__s) #__s
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static int
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do_test (void)
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{
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struct timespec tv_before_ntp, tv_after_ntp;
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struct ntptimeval ntv;
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/* To prevent seconds rollover (which is very unlikely though),
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loop until we do match seconds values before and after
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call to ntp_gettime. */
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do
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{
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tv_before_ntp = xclock_now (CLOCK_REALTIME);
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int ret = NTP_GETTIME_SYSCALL (&ntv);
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if (ret == -1)
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FAIL_EXIT1 (STR(NTP_GETTIME_SYSCALL)" failed: %m\n");
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tv_after_ntp = xclock_now (CLOCK_REALTIME);
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}
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while (tv_after_ntp.tv_sec != tv_before_ntp.tv_sec);
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TEST_COMPARE (tv_after_ntp.tv_sec, ntv.time.tv_sec);
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return 0;
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}
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#include <support/test-driver.c>
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