1 /* $NetBSD: t_getpid.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_getpid.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $");
33 
34 #include <sys/wait.h>
35 
36 #include <stdlib.h>
37 #include <pthread.h>
38 #include <unistd.h>
39 
40 #include <atf-c.h>
41 
42 static int	 maxiter = 10;
43 static void	*threadfunc(void *);
44 
45 static void *
46 threadfunc(void *arg)
47 {
48 	*(pid_t *)arg = getpid();
49 
50 	return NULL;
51 }
52 
53 ATF_TC(getpid_process);
54 ATF_TC_HEAD(getpid_process, tc)
55 {
56 	atf_tc_set_md_var(tc, "descr", "Test getpid(2) with processes");
57 }
58 
59 ATF_TC_BODY(getpid_process, tc)
60 {
61 	pid_t ppid, fpid, cpid, tpid, wpid;
62 	int i, sta;
63 
64 	for (i = 0; i < maxiter; i++) {
65 
66 		tpid = getpid();
67 		fpid = fork();
68 
69 		ATF_REQUIRE(fpid >= 0);
70 
71 		if (fpid == 0) {
72 
73 			cpid = getpid();
74 			ppid = getppid();
75 
76 			if (tpid != ppid)
77 				_exit(EXIT_FAILURE);
78 
79 			if (cpid == ppid)
80 				_exit(EXIT_FAILURE);
81 
82 			if (tpid == fpid)
83 				_exit(EXIT_FAILURE);
84 
85 			_exit(EXIT_SUCCESS);
86 		}
87 
88 		wpid = wait(&sta);
89 
90 		if (wpid != fpid)
91 			atf_tc_fail("PID mismatch");
92 
93 		ATF_REQUIRE(WIFEXITED(sta) != 0);
94 
95 		if (WEXITSTATUS(sta) != EXIT_SUCCESS)
96 			atf_tc_fail("PID mismatch");
97 	}
98 }
99 
100 ATF_TC(getpid_thread);
101 ATF_TC_HEAD(getpid_thread, tc)
102 {
103 	atf_tc_set_md_var(tc, "descr", "Test getpid(2) with threads");
104 }
105 
106 ATF_TC_BODY(getpid_thread, tc)
107 {
108 	pid_t pid, tpid;
109 	pthread_t tid;
110 	int i, rv;
111 
112 	for (i = 0; i < maxiter; i++) {
113 
114 		pid = getpid();
115 
116 		rv = pthread_create(&tid, NULL, threadfunc, &tpid);
117 		ATF_REQUIRE(rv == 0);
118 
119 		rv = pthread_join(tid, NULL);
120 		ATF_REQUIRE(rv == 0);
121 
122 		if (pid != tpid)
123 			atf_tc_fail("Unequal PIDs");
124 	}
125 }
126 
127 ATF_TP_ADD_TCS(tp)
128 {
129 
130 	ATF_TP_ADD_TC(tp, getpid_process);
131 	ATF_TP_ADD_TC(tp, getpid_thread);
132 
133 	return atf_no_error();
134 }
135