tests/lib/libc/sys/t_nanosleep.c

   1 /* $NetBSD: t_nanosleep.c,v 1.3 2013/03/31 16:47:16 christos 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 1.3 2013/03/31 16:47:16 christos 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",
 100             "Test errors from nanosleep(2) (PR bin/14558)");
 101 }
 102
 103 ATF_TC_BODY(nanosleep_err, tc)
 104 {
 105         struct timespec ts;
 106
 107         ts.tv_sec = 1;
 108         ts.tv_nsec = -1;
 109         errno = 0;
 110         ATF_REQUIRE_ERRNO(EINVAL, nanosleep(&ts, NULL) == -1);
 111
 112         ts.tv_sec = 1;
 113         ts.tv_nsec = 1000000000;
 114         errno = 0;
 115         ATF_REQUIRE_ERRNO(EINVAL, nanosleep(&ts, NULL) == -1);
 116
 117         ts.tv_sec = -1;
 118         ts.tv_nsec = 0;
 119         errno = 0;
 120         ATF_REQUIRE_ERRNO(0, nanosleep(&ts, NULL) == 0);
 121
 122         errno = 0;
 123         ATF_REQUIRE_ERRNO(EFAULT, nanosleep((void *)-1, NULL) == -1);
 124 }
 125
 126 ATF_TC(nanosleep_sig);
 127 ATF_TC_HEAD(nanosleep_sig, tc)
 128 {
 129         atf_tc_set_md_var(tc, "descr", "Test signal for nanosleep(2)");
 130 }
 131
 132 ATF_TC_BODY(nanosleep_sig, tc)
 133 {
 134         struct timespec tsn, tsr;
 135         pid_t pid;
 136         int sta;
 137
 138         /*
 139          * Test that a signal interrupts nanosleep(2).
 140          *
 141          * (In which case the return value should be -1 and the
 142          * second parameter should contain the unslept time.)
 143          */
 144         pid = fork();
 145
 146         ATF_REQUIRE(pid >= 0);
 147         ATF_REQUIRE(signal(SIGINT, handler) == 0);
 148
 149         if (pid == 0) {
 150
 151                 tsn.tv_sec = 10;
 152                 tsn.tv_nsec = 0;
 153
 154                 tsr.tv_sec = 0;
 155                 tsr.tv_nsec = 0;
 156
 157                 errno = 0;
 158
 159                 if (nanosleep(&tsn, &tsr) != -1)
 160                         _exit(EXIT_FAILURE);
 161
 162                 if (errno != EINTR)
 163                         _exit(EXIT_FAILURE);
 164
 165                 if (tsr.tv_sec == 0 && tsr.tv_nsec == 0)
 166                         _exit(EXIT_FAILURE);
 167
 168                 _exit(EXIT_SUCCESS);
 169         }
 170
 171         (void)sleep(1);
 172         (void)kill(pid, SIGINT);
 173         (void)wait(&sta);
 174
 175         if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
 176                 atf_tc_fail("signal did not interrupt nanosleep(2)");
 177 }
 178
 179 ATF_TP_ADD_TCS(tp)
 180 {
 181
 182         ATF_TP_ADD_TC(tp, nanosleep_basic);
 183         ATF_TP_ADD_TC(tp, nanosleep_err);
 184         ATF_TP_ADD_TC(tp, nanosleep_sig);
 185
 186         return atf_no_error();
 187 }