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t_time.c revision 1.3 
      1 /*	$NetBSD: t_time.c,v 1.3 2014/10/31 12:22:38 justin 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_time.c,v 1.3 2014/10/31 12:22:38 justin Exp $");
     33 
     34 #include <atf-c.h>
     35 #include <errno.h>
     36 #include <inttypes.h>
     37 #include <stdint.h>
     38 #include <stdio.h>
     39 #include <stdlib.h>
     40 #include <time.h>
     41 #include <unistd.h>
     42 
     43 ATF_TC(time_copy);
     44 ATF_TC_HEAD(time_copy, tc)
     45 {
     46 	atf_tc_set_md_var(tc, "descr", "Test the return values of time(3)");
     47 }
     48 
     49 ATF_TC_BODY(time_copy, tc)
     50 {
     51 	time_t t1, t2 = 0;
     52 
     53 	t1 = time(&t2);
     54 
     55 	if (t1 != t2)
     56 		atf_tc_fail("incorrect return values from time(3)");
     57 }
     58 
     59 ATF_TC(time_mono);
     60 ATF_TC_HEAD(time_mono, tc)
     61 {
     62 	atf_tc_set_md_var(tc, "descr", "Test monotonicity of time(3)");
     63 }
     64 
     65 ATF_TC_BODY(time_mono, tc)
     66 {
     67 	const size_t maxiter = 10;
     68 	time_t t1, t2;
     69 	size_t i;
     70 
     71 	for (i = 0; i < maxiter; i++) {
     72 
     73 		t1 = time(NULL);
     74 		(void)sleep(1);
     75 		t2 = time(NULL);
     76 
     77 		(void)fprintf(stderr, "%"PRId64" vs. %"PRId64"\n",
     78 		    (int64_t)t1, (int64_t)t2);
     79 
     80 		if (t1 >= t2)
     81 			atf_tc_fail("time(3) is not monotonic");
     82 	}
     83 }
     84 
     85 ATF_TC(time_timeofday);
     86 ATF_TC_HEAD(time_timeofday, tc)
     87 {
     88 	atf_tc_set_md_var(tc, "descr", "Test time(3) vs. gettimeofday(2)");
     89 }
     90 
     91 ATF_TC_BODY(time_timeofday, tc)
     92 {
     93 	struct timeval tv = { 0, 0 };
     94 	time_t t1, t2;
     95 
     96 	t1 = time(NULL);
     97 	ATF_REQUIRE(gettimeofday(&tv, NULL) == 0);
     98 	t2 = time(NULL);
     99 
    100 	(void)fprintf(stderr, "%"PRId64" vs. %"PRId64"\n",
    101 	    (int64_t)t1, (int64_t)tv.tv_sec);
    102 
    103 	if (t1 > tv.tv_sec || t2 < tv.tv_sec)
    104 		atf_tc_fail("time(3) and gettimeofday(2) differ");
    105 }
    106 
    107 ATF_TP_ADD_TCS(tp)
    108 {
    109 
    110 	ATF_TP_ADD_TC(tp, time_copy);
    111 	ATF_TP_ADD_TC(tp, time_mono);
    112 	ATF_TP_ADD_TC(tp, time_timeofday);
    113 
    114 	return atf_no_error();
    115 }
    116