tools/regression/mqueue/mqtest3/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 #define MQNAME  "/mytstqueue3"
  15 #define LOOPS   1000
  16 #define PRIO    10
  17
  18 void sighandler(int sig)
  19 {
  20         write(1, "timeout\n", 8);
  21         _exit(1);
  22 }
  23
  24 int main()
  25 {
  26         mqd_t mq;
  27         int status;
  28         struct mq_attr attr;
  29         int pid;
  30         fd_set set;
  31
  32         mq_unlink(MQNAME);
  33
  34         attr.mq_maxmsg  = 5;
  35         attr.mq_msgsize = 128;
  36         mq = mq_open(MQNAME, O_CREAT | O_RDWR | O_EXCL, 0666, &attr);
  37         if (mq == (mqd_t)-1)
  38                 err(1, "mq_open()");
  39         status = mq_getattr(mq, &attr);
  40         if (status)
  41                 err(1, "mq_getattr()");
  42
  43         pid = fork();
  44         if (pid == 0) { /* child */
  45                 int prio, j, i;
  46                 char *buf;
  47
  48                 mq_close(mq);
  49
  50                 signal(SIGALRM, sighandler);
  51
  52                 mq = mq_open(MQNAME, O_RDWR);
  53                 if (mq == (mqd_t)-1)
  54                         err(1, "child process: mq_open");
  55                 buf = malloc(attr.mq_msgsize);
  56                 for (j = 0; j < LOOPS; ++j) {
  57                         FD_ZERO(&set);
  58                         FD_SET(__mq_oshandle(mq), &set);
  59                         alarm(3);
  60                         status = select(__mq_oshandle(mq)+1, &set, NULL, NULL, NULL);
  61                         if (status != 1)
  62                                 err(1, "child process: select()");
  63                         status = mq_receive(mq, buf, attr.mq_msgsize, &prio);
  64                         if (status == -1)
  65                                 err(2, "child process: mq_receive");
  66                         for (i = 0; i < attr.mq_msgsize; ++i)
  67                                 if (buf[i] != i)
  68                                         err(3, "message data corrupted");
  69                         if (prio != PRIO)
  70                                 err(4, "priority is incorrect: %d", 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, prio;
  81
  82                 signal(SIGALRM, sighandler);
  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                         }
  88                         alarm(3);
  89                         FD_ZERO(&set);
  90                         FD_SET(__mq_oshandle(mq), &set);
  91                         status = select(__mq_oshandle(mq)+1, NULL, &set, NULL, NULL);
  92                         if (status != 1)
  93                                 err(1, "select()");
  94                         status = mq_send(mq, buf, attr.mq_msgsize, PRIO);
  95                         if (status) {
  96                                 kill(pid, SIGKILL);
  97                                 err(2, "mq_send()");
  98                         }
  99                 }
 100                 alarm(3);
 101                 wait(&status);
 102                 alarm(0);
 103         }
 104         status = mq_close(mq);
 105         if (status)
 106                 err(1, "mq_close");
 107         mq_unlink(MQNAME);
 108         return (0);
 109 }