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t_nice.c revision 1.2 
      1 /*	$NetBSD: t_nice.c,v 1.2 2011/04/04 10:30:29 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_nice.c,v 1.2 2011/04/04 10:30:29 jruoho Exp $");
     33 
     34 #include <sys/resource.h>
     35 #include <sys/wait.h>
     36 
     37 #include <atf-c.h>
     38 #include <errno.h>
     39 #include <limits.h>
     40 #include <stdlib.h>
     41 #include <unistd.h>
     42 
     43 ATF_TC(nice_err);
     44 ATF_TC_HEAD(nice_err, tc)
     45 {
     46 	atf_tc_set_md_var(tc, "descr", "Test nice(3) for invalid parameters");
     47 	atf_tc_set_md_var(tc, "require.user", "unprivileged");
     48 }
     49 
     50 ATF_TC_BODY(nice_err, tc)
     51 {
     52 	int i;
     53 
     54 	/*
     55 	 * The call should fail with EPERM if the
     56 	 * supplied parameter is negative and the
     57 	 * caller does not have privileges. Note
     58 	 * that the errno is thus "wrong" in NetBSD.
     59 	 */
     60 	for (i = -20; i < 0; i++) {
     61 
     62 		errno = 0;
     63 
     64 		ATF_REQUIRE(nice(i) == -1);
     65 		ATF_REQUIRE(errno == EACCES);
     66 	}
     67 }
     68 
     69 ATF_TC(nice_priority);
     70 ATF_TC_HEAD(nice_priority, tc)
     71 {
     72 	atf_tc_set_md_var(tc, "descr", "Test nice(3) vs. getpriority(2)");
     73 }
     74 
     75 ATF_TC_BODY(nice_priority, tc)
     76 {
     77 	int i, pri, nic;
     78 	pid_t pid;
     79 	int sta;
     80 
     81 	for (i = 0; i <= 20; i++) {
     82 
     83 		nic = nice(i);
     84 		ATF_REQUIRE(nic != -1);
     85 
     86 		errno = 0;
     87 		pri = getpriority(PRIO_PROCESS, 0);
     88 		ATF_REQUIRE(errno == 0);
     89 
     90 		if (nic != pri)
     91 			atf_tc_fail("nice(3) and getpriority(2) conflict");
     92 
     93 		/*
     94 		 * Also verify that the nice(3) values
     95 		 * are inherited by child processes.
     96 		 */
     97 		pid = fork();
     98 		ATF_REQUIRE(pid >= 0);
     99 
    100 		if (pid == 0) {
    101 
    102 			errno = 0;
    103 			pri = getpriority(PRIO_PROCESS, 0);
    104 			ATF_REQUIRE(errno == 0);
    105 
    106 			if (nic != pri)
    107 				_exit(EXIT_FAILURE);
    108 
    109 			_exit(EXIT_SUCCESS);
    110 		}
    111 
    112 		(void)wait(&sta);
    113 
    114 		if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
    115 			atf_tc_fail("nice(3) value was not inherited");
    116 	}
    117 }
    118 
    119 ATF_TC(nice_root);
    120 ATF_TC_HEAD(nice_root, tc)
    121 {
    122 	atf_tc_set_md_var(tc, "descr", "Test that nice(3) works");
    123 	atf_tc_set_md_var(tc, "require.user", "root");
    124 }
    125 
    126 ATF_TC_BODY(nice_root, tc)
    127 {
    128 	int i;
    129 
    130 	for (i = -20; i <= 20; i++) {
    131 
    132 		ATF_REQUIRE(nice(i) != -1);
    133 	}
    134 }
    135 
    136 ATF_TP_ADD_TCS(tp)
    137 {
    138 
    139 	ATF_TP_ADD_TC(tp, nice_err);
    140 	ATF_TP_ADD_TC(tp, nice_priority);
    141 	ATF_TP_ADD_TC(tp, nice_root);
    142 
    143 	return atf_no_error();
    144 }
    145