mqtest2.c revision 282858 
1/* $FreeBSD: stable/10/tests/sys/mqueue/mqtest2.c 282858 2015-05-13 12:09:01Z ngie $ */
2
3#include <sys/types.h>
4#include <sys/wait.h>
5#include <err.h>
6#include <fcntl.h>
7#include <mqueue.h>
8#include <signal.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <unistd.h>
12
13#include "freebsd_test_suite/macros.h"
14
15#define MQNAME	"/mytstqueue2"
16#define LOOPS	1000
17#define PRIO	10
18
19static void
20alarmhandler(int sig __unused)
21{
22	write(1, "timeout\n", 8);
23	_exit(1);
24}
25
26int
27main(void)
28{
29	struct mq_attr attr;
30	mqd_t mq;
31	int status;
32	pid_t pid;
33
34	PLAIN_REQUIRE_KERNEL_MODULE("mqueuefs", 0);
35
36	mq_unlink(MQNAME);
37
38	attr.mq_maxmsg  = 5;
39	attr.mq_msgsize = 128;
40	mq = mq_open(MQNAME, O_CREAT | O_RDWR | O_EXCL, 0666, &attr);
41	if (mq == (mqd_t)-1)
42		err(1, "mq_open");
43	status = mq_getattr(mq, &attr);
44	if (status)
45		err(1, "mq_getattr");
46	pid = fork();
47	if (pid == 0) { /* child */
48		char *buf;
49		int j, i;
50		unsigned int prio;
51
52		mq_close(mq);
53
54		signal(SIGALRM, alarmhandler);
55
56		mq = mq_open(MQNAME, O_RDWR);
57		if (mq == (mqd_t)-1)
58			err(1, "child: mq_open");
59		buf = malloc(attr.mq_msgsize);
60		for (j = 0; j < LOOPS; ++j) {
61			alarm(3);
62			status = mq_receive(mq, buf, attr.mq_msgsize, &prio);
63			if (status == -1)
64				err(2, "child: mq_receive");
65			for (i = 0; i < attr.mq_msgsize; ++i)
66				if (buf[i] != i)
67					err(3, "child: message data corrupted");
68			if (prio != PRIO)
69				err(4, "child: priority is incorrect: %d",
70					prio);
71		}
72		alarm(0);
73		free(buf);
74		mq_close(mq);
75		return (0);
76	} else if (pid == -1) {
77		err(1, "fork()");
78	} else {
79		char *buf;
80		int i, j;
81
82		signal(SIGALRM, alarmhandler);
83		buf = malloc(attr.mq_msgsize);
84		for (j = 0; j < LOOPS; ++j) {
85			for (i = 0; i < attr.mq_msgsize; ++i)
86				buf[i] = i;
87			alarm(3);
88			status = mq_send(mq, buf, attr.mq_msgsize, PRIO);
89			if (status)
90				err(1, "mq_send");
91		}
92		alarm(3);
93		wait(&status);
94		alarm(0);
95	}
96	status = mq_close(mq);
97	if (status)
98		err(1, "mq_close");
99	mq_unlink(MQNAME);
100	return (0);
101}
102