tests/lib/libc/sys/t_gettimeofday.c

   1 /* $NetBSD: t_gettimeofday.c,v 1.1 2011/07/07 06:57:53 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_gettimeofday.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $");
  33
  34 #include <sys/time.h>
  35
  36 #include <atf-c.h>
  37 #include <errno.h>
  38 #include <string.h>
  39
  40 ATF_TC(gettimeofday_err);
  41 ATF_TC_HEAD(gettimeofday_err, tc)
  42 {
  43         atf_tc_set_md_var(tc, "descr", "Test errors from gettimeofday(2)");
  44 }
  45
  46 ATF_TC_BODY(gettimeofday_err, tc)
  47 {
  48
  49         errno = 0;
  50
  51         ATF_REQUIRE_ERRNO(EFAULT, gettimeofday((void *)-1, NULL) != 0);
  52 }
  53
  54 ATF_TC(gettimeofday_mono);
  55 ATF_TC_HEAD(gettimeofday_mono, tc)
  56 {
  57         atf_tc_set_md_var(tc, "descr", "Test monotonicity of gettimeofday(2)");
  58 }
  59
  60 ATF_TC_BODY(gettimeofday_mono, tc)
  61 {
  62         static const size_t maxiter = 100;
  63         struct timeval tv1, tv2;
  64         size_t i;
  65
  66         for (i = 0; i < maxiter; i++) {
  67
  68                 (void)memset(&tv1, 0, sizeof(struct timeval));
  69                 (void)memset(&tv2, 0, sizeof(struct timeval));
  70
  71                 ATF_REQUIRE(gettimeofday(&tv1, NULL) == 0);
  72                 ATF_REQUIRE(gettimeofday(&tv2, NULL) == 0);
  73
  74                 if (timercmp(&tv2, &tv1, <) != 0)
  75                         atf_tc_fail("time went backwards");
  76         }
  77 }
  78
  79 ATF_TP_ADD_TCS(tp)
  80 {
  81
  82         ATF_TP_ADD_TC(tp, gettimeofday_err);
  83         ATF_TP_ADD_TC(tp, gettimeofday_mono);
  84
  85         return atf_no_error();
  86 }