61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
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* Author: Billy Jean Horne
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* Copyright (c) Linux Test Project, 2009-2022
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*/
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/*\
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* [Description]
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*
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* Verify that alarm() returns:
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* - zero when there was no previously scheduled alarm
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* - number of seconds remaining until any previously scheduled alarm
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*/
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#include "tst_test.h"
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static volatile int alarms_received;
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static struct tcase {
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char *str;
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unsigned int sec;
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} tcases[] = {
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{"INT_MAX", INT_MAX},
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{"UINT_MAX/2", UINT_MAX/2},
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{"UINT_MAX/4", UINT_MAX/4},
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};
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static void verify_alarm(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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alarms_received = 0;
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TST_EXP_PASS(alarm(tc->sec), "alarm(%u)", tc->sec);
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TST_EXP_VAL(alarm(0), tc->sec);
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if (alarms_received == 1) {
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tst_res(TFAIL, "alarm(%u) delivered SIGALRM for seconds value %s",
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tc->sec, tc->str);
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}
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}
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static void sighandler(int sig)
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{
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if (sig == SIGALRM)
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alarms_received++;
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}
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static void setup(void)
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{
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SAFE_SIGNAL(SIGALRM, sighandler);
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.test = verify_alarm,
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.setup = setup,
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};
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