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62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* Test for clock_adjtime
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Copyright (C) 2021-2024 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/time.h>
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#include <support/check.h>
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#include <support/timespec.h>
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#ifndef ADJTIME_CALL
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# define ADJTIME_CALL(__clock, __timex) clock_adjtime (__clock, __timex)
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#endif
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static int
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do_test (void)
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{
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struct timespec tv_then, tv_now;
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struct timex delta;
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/* Check if altering target time is allowed. */
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if (getenv (SETTIME_ENV_NAME) == NULL)
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FAIL_UNSUPPORTED ("clock_adjtime is executed only when "\
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SETTIME_ENV_NAME" is set\n");
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tv_then = xclock_now (CLOCK_REALTIME);
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/* Setup time value to adjust - 1 sec. */
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delta.time.tv_sec = 1;
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delta.time.tv_usec = 0;
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delta.modes = ADJ_SETOFFSET;
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int ret = ADJTIME_CALL (CLOCK_REALTIME, &delta);
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if (ret == -1)
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FAIL_EXIT1 ("clock_adjtime failed: %m\n");
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tv_now = xclock_now (CLOCK_REALTIME);
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/* Check if clock_adjtime adjusted the system time. */
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struct timespec r = timespec_sub (tv_now, tv_then);
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TEST_COMPARE (support_timespec_check_in_range
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((struct timespec) { 1, 0 }, r, 0.9, 1.1), 1);
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return 0;
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}
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#include <support/test-driver.c>
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