62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* Ported to LTP 07/2001 John George
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* Testcase to check the basic functionality of settimeofday().
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*/
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#include <sys/time.h>
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#include <errno.h>
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#include <unistd.h>
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#include "tst_test.h"
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#include "lapi/syscalls.h"
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#define VAL_SEC 100
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#define VAL_MSEC 100
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#define ACCEPTABLE_DELTA 500
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#define USEC_PER_SEC 1000000L
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static void verify_settimeofday(void)
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{
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suseconds_t delta;
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struct timeval tv1, tv2;
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if (gettimeofday(&tv1, NULL) == -1)
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tst_brk(TBROK | TERRNO, "gettimeofday(&tv1, NULL) failed");
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tv1.tv_sec += VAL_SEC;
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tv1.tv_usec += VAL_MSEC;
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if (tv1.tv_usec >= USEC_PER_SEC)
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tv1.tv_usec = VAL_MSEC;
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TEST(settimeofday(&tv1, NULL));
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if (TST_RET == -1) {
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tst_res(TFAIL | TTERRNO, "settimeofday(&tv1, NULL) failed");
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return;
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}
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if (gettimeofday(&tv2, NULL) == -1)
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tst_brk(TBROK | TERRNO, "gettimeofday(&tv2, NULL) failed");
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if (tv2.tv_sec > tv1.tv_sec) {
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delta =
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(suseconds_t) (tv2.tv_sec - tv1.tv_sec) * 1000 +
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(tv2.tv_usec - tv1.tv_usec) / 1000;
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} else {
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delta =
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(suseconds_t) (tv1.tv_sec - tv2.tv_sec) * 1000 +
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(tv1.tv_usec - tv2.tv_usec) / 1000;
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}
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if (delta > -ACCEPTABLE_DELTA && delta < ACCEPTABLE_DELTA)
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tst_res(TPASS, "settimeofday() pass");
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else
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tst_res(TFAIL, "settimeofday() fail");
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}
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static struct tst_test test = {
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.restore_wallclock = 1,
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.test_all = verify_settimeofday,
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.needs_root = 1,
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};
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