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t_nanosleep.c revision 1.1 
      1 /* $NetBSD: t_nanosleep.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jukka Ruohonen.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #include <sys/cdefs.h>
     32 __RCSID("$NetBSD: t_nanosleep.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $");
     33 
     34 #include <sys/time.h>
     35 #include <sys/wait.h>
     36 
     37 #include <atf-c.h>
     38 #include <errno.h>
     39 #include <time.h>
     40 #include <signal.h>
     41 #include <stdio.h>
     42 #include <stdlib.h>
     43 #include <string.h>
     44 #include <sysexits.h>
     45 #include <unistd.h>
     46 
     47 static void
     48 handler(int signo)
     49 {
     50 	/* Nothing. */
     51 }
     52 
     53 ATF_TC(nanosleep_basic);
     54 ATF_TC_HEAD(nanosleep_basic, tc)
     55 {
     56 	atf_tc_set_md_var(tc, "descr", "Test that nanosleep(2) works");
     57 }
     58 
     59 ATF_TC_BODY(nanosleep_basic, tc)
     60 {
     61 	static const size_t maxiter = 10;
     62 	struct timespec ts1, ts2, tsn;
     63 	size_t i;
     64 
     65 	for (i = 1; i < maxiter; i++) {
     66 
     67 		tsn.tv_sec = 0;
     68 		tsn.tv_nsec = i;
     69 
     70 		(void)memset(&ts1, 0, sizeof(struct timespec));
     71 		(void)memset(&ts2, 0, sizeof(struct timespec));
     72 
     73 		ATF_REQUIRE(clock_gettime(CLOCK_MONOTONIC, &ts1) == 0);
     74 		ATF_REQUIRE(nanosleep(&tsn, NULL) == 0);
     75 		ATF_REQUIRE(clock_gettime(CLOCK_MONOTONIC, &ts2) == 0);
     76 
     77 		/*
     78 		 * Verify that we slept at least one nanosecond.
     79 		 */
     80 		if (timespeccmp(&ts2, &ts1, <=) != 0) {
     81 
     82 			(void)fprintf(stderr,
     83 			    "sleep time:: sec %llu, nsec %lu\n\t\t"
     84 			    "ts1: sec %llu, nsec %lu\n\t\t"
     85 			    "ts2: sec %llu, nsec %lu\n",
     86 			    (unsigned long long)tsn.tv_sec, tsn.tv_nsec,
     87 			    (unsigned long long)ts1.tv_sec, ts1.tv_nsec,
     88 			    (unsigned long long)ts2.tv_sec, ts2.tv_nsec);
     89 
     90 			atf_tc_fail_nonfatal("inaccuracies in sleep time "
     91 			    "(resolution = %lu nsec)", tsn.tv_nsec);
     92 		}
     93 	}
     94 }
     95 
     96 ATF_TC(nanosleep_err);
     97 ATF_TC_HEAD(nanosleep_err, tc)
     98 {
     99 	atf_tc_set_md_var(tc, "descr", "Test errors from nanosleep(2)");
    100 }
    101 
    102 ATF_TC_BODY(nanosleep_err, tc)
    103 {
    104 	struct timespec ts;
    105 
    106 	ts.tv_sec = -1;
    107 	ts.tv_nsec = 1000;
    108 
    109 	errno = 0;
    110 	ATF_REQUIRE_ERRNO(EINVAL, nanosleep(&ts, NULL) == -1);
    111 
    112 	errno = 0;
    113 	ATF_REQUIRE_ERRNO(EFAULT, nanosleep((void *)-1, NULL) == -1);
    114 }
    115 
    116 ATF_TC(nanosleep_sig);
    117 ATF_TC_HEAD(nanosleep_sig, tc)
    118 {
    119 	atf_tc_set_md_var(tc, "descr", "Test signal for nanosleep(2)");
    120 }
    121 
    122 ATF_TC_BODY(nanosleep_sig, tc)
    123 {
    124 	struct timespec tsn, tsr;
    125 	pid_t pid;
    126 	int sta;
    127 
    128 	/*
    129 	 * Test that a signal interrupts nanosleep(2).
    130 	 *
    131 	 * (In which case the return value should be -1 and the
    132 	 * second parameter should contain the unslept time.)
    133 	 */
    134 	pid = fork();
    135 
    136 	ATF_REQUIRE(pid >= 0);
    137 	ATF_REQUIRE(signal(SIGINT, handler) == 0);
    138 
    139 	if (pid == 0) {
    140 
    141 		tsn.tv_sec = 10;
    142 		tsn.tv_nsec = 0;
    143 
    144 		tsr.tv_sec = 0;
    145 		tsr.tv_nsec = 0;
    146 
    147 		errno = 0;
    148 
    149 		if (nanosleep(&tsn, &tsr) != -1)
    150 			_exit(EXIT_FAILURE);
    151 
    152 		if (errno != EINTR)
    153 			_exit(EXIT_FAILURE);
    154 
    155 		if (tsr.tv_sec == 0 && tsr.tv_nsec == 0)
    156 			_exit(EXIT_FAILURE);
    157 
    158 		_exit(EXIT_SUCCESS);
    159 	}
    160 
    161 	(void)sleep(1);
    162 	(void)kill(pid, SIGINT);
    163 	(void)wait(&sta);
    164 
    165 	if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
    166 		atf_tc_fail("signal did not interrupt nanosleep(2)");
    167 }
    168 
    169 ATF_TP_ADD_TCS(tp)
    170 {
    171 
    172 	ATF_TP_ADD_TC(tp, nanosleep_basic);
    173 	ATF_TP_ADD_TC(tp, nanosleep_err);
    174 	ATF_TP_ADD_TC(tp, nanosleep_sig);
    175 
    176 	return atf_no_error();
    177 }
    178