mqtest4.c revision 282858 
1/* $FreeBSD: stable/10/tests/sys/mqueue/mqtest4.c 282858 2015-05-13 12:09:01Z ngie $ */
2
3#include <sys/types.h>
4#include <sys/event.h>
5#include <sys/select.h>
6#include <sys/wait.h>
7#include <err.h>
8#include <fcntl.h>
9#include <mqueue.h>
10#include <signal.h>
11#include <stdio.h>
12#include <stdlib.h>
13#include <unistd.h>
14
15#include "freebsd_test_suite/macros.h"
16
17#define MQNAME	"/mytstqueue4"
18#define LOOPS	1000
19#define PRIO	10
20
21static void
22sighandler(int sig __unused)
23{
24	write(1, "timeout\n", 8);
25	_exit(1);
26}
27
28int
29main(void)
30{
31	struct kevent kev;
32	struct mq_attr attr;
33	mqd_t mq;
34	int kq, status;
35	pid_t pid;
36
37	PLAIN_REQUIRE_KERNEL_MODULE("mqueuefs", 0);
38
39	mq_unlink(MQNAME);
40
41	attr.mq_maxmsg  = 5;
42	attr.mq_msgsize = 128;
43	mq = mq_open(MQNAME, O_CREAT | O_RDWR | O_EXCL, 0666, &attr);
44	if (mq == (mqd_t) -1)
45		err(1, "mq_open()");
46	status = mq_getattr(mq, &attr);
47	if (status)
48		err(1, "mq_getattr()");
49	pid = fork();
50	if (pid == 0) { /* child */
51		char *buf;
52		int j, i;
53		unsigned int prio;
54
55		mq_close(mq);
56		kq = kqueue();
57		mq = mq_open(MQNAME, O_RDWR);
58		if (mq == (mqd_t)-1)
59			err(1, "child: mq_open");
60		EV_SET(&kev, __mq_oshandle(mq), EVFILT_READ, EV_ADD, 0, 0, 0);
61		status = kevent(kq, &kev, 1, NULL, 0, NULL);
62		if (status == -1)
63			err(1, "child: kevent");
64		buf = malloc(attr.mq_msgsize);
65		for (j = 0; j < LOOPS; ++j) {
66			alarm(3);
67			status = kevent(kq, NULL, 0, &kev, 1, NULL);
68			if (status != 1)
69				err(1, "child: kevent 2");
70			status = mq_receive(mq, buf, attr.mq_msgsize, &prio);
71			if (status == -1)
72				err(2, "child: mq_receive");
73			for (i = 0; i < attr.mq_msgsize; ++i)
74				if (buf[i] != i)
75					err(3, "child: message data corrupted");
76			if (prio != PRIO)
77				err(4, "child: priority is incorrect: %d",
78					 prio);
79		}
80		alarm(0);
81		free(buf);
82		mq_close(mq);
83		return (0);
84	} else if (pid == -1) {
85		err(1, "fork()");
86	} else {
87		char *buf;
88		int i, j;
89
90		signal(SIGALRM, sighandler);
91		kq = kqueue();
92		EV_SET(&kev, __mq_oshandle(mq), EVFILT_WRITE, EV_ADD, 0, 0, 0);
93		status = kevent(kq, &kev, 1, NULL, 0, NULL);
94		if (status == -1)
95			err(1, "kevent");
96		buf = malloc(attr.mq_msgsize);
97		for (j = 0; j < LOOPS; ++j) {
98			for (i = 0; i < attr.mq_msgsize; ++i) {
99				buf[i] = i;
100			}
101			alarm(3);
102			status = kevent(kq, NULL, 0, &kev, 1, NULL);
103			if (status != 1)
104				err(1, "child: kevent 2");
105			status = mq_send(mq, buf, attr.mq_msgsize, PRIO);
106			if (status) {
107				err(2, "mq_send()");
108			}
109		}
110		free(buf);
111		alarm(3);
112		wait(&status);
113		alarm(0);
114	}
115	status = mq_close(mq);
116	if (status)
117		err(1, "mq_close");
118	mq_unlink(MQNAME);
119	return (0);
120}
121