mqtest3.c revision 282858 
1/* $FreeBSD: stable/10/tests/sys/mqueue/mqtest3.c 282858 2015-05-13 12:09:01Z ngie $ */
2
3#include <sys/types.h>
4#include <sys/select.h>
5#include <sys/wait.h>
6#include <err.h>
7#include <fcntl.h>
8#include <mqueue.h>
9#include <signal.h>
10#include <stdio.h>
11#include <stdlib.h>
12#include <unistd.h>
13
14#include "freebsd_test_suite/macros.h"
15
16#define MQNAME	"/mytstqueue3"
17#define LOOPS	1000
18#define PRIO	10
19
20static void
21sighandler(int sig __unused)
22{
23	write(1, "timeout\n", 8);
24	_exit(1);
25}
26
27int
28main(void)
29{
30	fd_set set;
31	struct mq_attr attr;
32	int status;
33	mqd_t mq;
34	pid_t pid;
35
36	PLAIN_REQUIRE_KERNEL_MODULE("mqueuefs", 0);
37
38	mq_unlink(MQNAME);
39
40	attr.mq_maxmsg  = 5;
41	attr.mq_msgsize = 128;
42	mq = mq_open(MQNAME, O_CREAT | O_RDWR | O_EXCL, 0666, &attr);
43	if (mq == (mqd_t)-1)
44		err(1, "mq_open()");
45	status = mq_getattr(mq, &attr);
46	if (status)
47		err(1, "mq_getattr()");
48
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
57		signal(SIGALRM, sighandler);
58
59		mq = mq_open(MQNAME, O_RDWR);
60		if (mq == (mqd_t)-1)
61			err(1, "child process: mq_open");
62		buf = malloc(attr.mq_msgsize);
63		for (j = 0; j < LOOPS; ++j) {
64			FD_ZERO(&set);
65			FD_SET(__mq_oshandle(mq), &set);
66			alarm(3);
67			status = select(__mq_oshandle(mq)+1, &set, NULL, NULL, NULL);
68			if (status != 1)
69				err(1, "child process: select()");
70			status = mq_receive(mq, buf, attr.mq_msgsize, &prio);
71			if (status == -1)
72				err(2, "child process: mq_receive");
73			for (i = 0; i < attr.mq_msgsize; ++i)
74				if (buf[i] != i)
75					err(3, "message data corrupted");
76			if (prio != PRIO)
77				err(4, "priority is incorrect: %d", prio);
78		}
79		alarm(0);
80		free(buf);
81		mq_close(mq);
82		return (0);
83	} else if (pid == -1) {
84		err(1, "fork()");
85	} else {
86		char *buf;
87		int i, j;
88
89		signal(SIGALRM, sighandler);
90		buf = malloc(attr.mq_msgsize);
91		for (j = 0; j < LOOPS; ++j) {
92			for (i = 0; i < attr.mq_msgsize; ++i) {
93				buf[i] = i;
94			}
95			alarm(3);
96			FD_ZERO(&set);
97			FD_SET(__mq_oshandle(mq), &set);
98			status = select(__mq_oshandle(mq)+1, NULL, &set, NULL, NULL);
99			if (status != 1)
100				err(1, "select()");
101			status = mq_send(mq, buf, attr.mq_msgsize, PRIO);
102			if (status) {
103				kill(pid, SIGKILL);
104				err(2, "mq_send()");
105			}
106		}
107		alarm(3);
108		wait(&status);
109		alarm(0);
110	}
111	status = mq_close(mq);
112	if (status)
113		err(1, "mq_close");
114	mq_unlink(MQNAME);
115	return (0);
116}
117