/* $NetBSD: t_nanosleep.c,v 1.4 2017/01/13 21:15:14 christos Exp $ */

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jukka Ruohonen.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#include <sys/cdefs.h>
__RCSID("$NetBSD: t_nanosleep.c,v 1.4 2017/01/13 21:15:14 christos Exp $");

#include <sys/time.h>
#include <sys/wait.h>

#include <atf-c.h>
#include <errno.h>
#include <time.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>

static void
handler(int signo __unused)
{
        /* Nothing. */
}

ATF_TC(nanosleep_basic);
ATF_TC_HEAD(nanosleep_basic, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test that nanosleep(2) works");
}

ATF_TC_BODY(nanosleep_basic, tc)
{
        static const size_t maxiter = 10;
        struct timespec ts1, ts2, tsn;
        size_t i;

        for (i = 1; i < maxiter; i++) {

                tsn.tv_sec = 0;
                tsn.tv_nsec = i;

                (void)memset(&ts1, 0, sizeof(struct timespec));
                (void)memset(&ts2, 0, sizeof(struct timespec));

                ATF_REQUIRE(clock_gettime(CLOCK_MONOTONIC, &ts1) == 0);
                ATF_REQUIRE(nanosleep(&tsn, NULL) == 0);
                ATF_REQUIRE(clock_gettime(CLOCK_MONOTONIC, &ts2) == 0);

                /*
                 * Verify that we slept at least one nanosecond.
                 */
                if (timespeccmp(&ts2, &ts1, <=) != 0) {

                        (void)fprintf(stderr,
                            "sleep time:: sec %llu, nsec %lu\n\t\t"
                            "ts1: sec %llu, nsec %lu\n\t\t"
                            "ts2: sec %llu, nsec %lu\n",
                            (unsigned long long)tsn.tv_sec, tsn.tv_nsec,
                            (unsigned long long)ts1.tv_sec, ts1.tv_nsec,
                            (unsigned long long)ts2.tv_sec, ts2.tv_nsec);

                        atf_tc_fail_nonfatal("inaccuracies in sleep time "
                            "(resolution = %lu nsec)", tsn.tv_nsec);
                }
        }
}

ATF_TC(nanosleep_err);
ATF_TC_HEAD(nanosleep_err, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Test errors from nanosleep(2) (PR bin/14558)");
}

ATF_TC_BODY(nanosleep_err, tc)
{
        struct timespec ts;

        ts.tv_sec = 1;
        ts.tv_nsec = -1;
        errno = 0;
        ATF_REQUIRE_ERRNO(EINVAL, nanosleep(&ts, NULL) == -1);

        ts.tv_sec = 1;
        ts.tv_nsec = 1000000000;
        errno = 0;
        ATF_REQUIRE_ERRNO(EINVAL, nanosleep(&ts, NULL) == -1);

        ts.tv_sec = -1;
        ts.tv_nsec = 0;
        errno = 0;
        ATF_REQUIRE_ERRNO(0, nanosleep(&ts, NULL) == 0);

        errno = 0;
        ATF_REQUIRE_ERRNO(EFAULT, nanosleep((void *)-1, NULL) == -1);
}

ATF_TC(nanosleep_sig);
ATF_TC_HEAD(nanosleep_sig, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test signal for nanosleep(2)");
}

ATF_TC_BODY(nanosleep_sig, tc)
{
        struct timespec tsn, tsr;
        pid_t pid;
        int sta;

        /*
         * Test that a signal interrupts nanosleep(2).
         *
         * (In which case the return value should be -1 and the
         * second parameter should contain the unslept time.)
         */
        pid = fork();

        ATF_REQUIRE(pid >= 0);
        ATF_REQUIRE(signal(SIGINT, handler) == 0);

        if (pid == 0) {

                tsn.tv_sec = 10;
                tsn.tv_nsec = 0;

                tsr.tv_sec = 0;
                tsr.tv_nsec = 0;

                errno = 0;

                if (nanosleep(&tsn, &tsr) != -1)
                        _exit(EXIT_FAILURE);

                if (errno != EINTR)
                        _exit(EXIT_FAILURE);

                if (tsr.tv_sec == 0 && tsr.tv_nsec == 0)
                        _exit(EXIT_FAILURE);

                _exit(EXIT_SUCCESS);
        }

        (void)sleep(1);
        (void)kill(pid, SIGINT);
        (void)wait(&sta);

        if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
                atf_tc_fail("signal did not interrupt nanosleep(2)");
}

ATF_TP_ADD_TCS(tp)
{

        ATF_TP_ADD_TC(tp, nanosleep_basic);
        ATF_TP_ADD_TC(tp, nanosleep_err);
        ATF_TP_ADD_TC(tp, nanosleep_sig);

        return atf_no_error();
}