tests/sys/mqueue/mqtest3.c

   1 /* $FreeBSD$ */
   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
  20 static void
  21 sighandler(int sig __unused)
  22 {
  23         write(1, "timeout\n", 8);
  24         _exit(1);
  25 }
  26
  27 int
  28 main(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_getfd_np(mq), &set);
  66                         alarm(3);
  67                         status = select(mq_getfd_np(mq) + 1, &set, NULL,
  68                             NULL, NULL);
  69                         if (status != 1)
  70                                 err(1, "child process: select()");
  71                         status = mq_receive(mq, buf, attr.mq_msgsize, &prio);
  72                         if (status == -1)
  73                                 err(2, "child process: mq_receive");
  74                         for (i = 0; i < attr.mq_msgsize; ++i)
  75                                 if (buf[i] != i)
  76                                         err(3, "message data corrupted");
  77                         if (prio != PRIO)
  78                                 err(4, "priority is incorrect: %d", 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                 buf = malloc(attr.mq_msgsize);
  92                 for (j = 0; j < LOOPS; ++j) {
  93                         for (i = 0; i < attr.mq_msgsize; ++i) {
  94                                 buf[i] = i;
  95                         }
  96                         alarm(3);
  97                         FD_ZERO(&set);
  98                         FD_SET(mq_getfd_np(mq), &set);
  99                         status = select(mq_getfd_np(mq) + 1, NULL, &set,
 100                             NULL, NULL);
 101                         if (status != 1)
 102                                 err(1, "select()");
 103                         status = mq_send(mq, buf, attr.mq_msgsize, PRIO);
 104                         if (status) {
 105                                 kill(pid, SIGKILL);
 106                                 err(2, "mq_send()");
 107                         }
 108                 }
 109                 alarm(3);
 110                 wait(&status);
 111                 alarm(0);
 112         }
 113         status = mq_close(mq);
 114         if (status)
 115                 err(1, "mq_close");
 116         mq_unlink(MQNAME);
 117         return (0);
 118 }