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glibc  2.9
Defines | Functions
tst-mqueue1.c File Reference
#include <errno.h>
#include <fcntl.h>
#include <mqueue.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include "tst-mqueue.h"
#include "../test-skeleton.c"

Go to the source code of this file.

Defines

#define TEST_FUNCTION   do_test ()

Functions

static int intcmp (const void *a, const void *b)
static int check_attrs (struct mq_attr *attr, int nonblock, long cnt)
static int do_one_test (mqd_t q, const char *name, int nonblock)
static int do_test (void)

Define Documentation

#define TEST_FUNCTION   do_test ()

Definition at line 311 of file tst-mqueue1.c.


Function Documentation

static int check_attrs ( struct mq_attr attr,
int  nonblock,
long  cnt 
) [static]

Definition at line 43 of file tst-mqueue1.c.

{
  int result = 0;

  if (attr->mq_maxmsg != 10 || attr->mq_msgsize != 1)
    {
      printf ("attributes don't match those passed to mq_open\n"
             "mq_maxmsg %ld, mq_msgsize %ld\n",
             attr->mq_maxmsg, attr->mq_msgsize);
      result = 1;
    }

  if ((attr->mq_flags & O_NONBLOCK) != nonblock)
    {
      printf ("mq_flags %lx != %x\n", (attr->mq_flags & O_NONBLOCK), nonblock);
      result = 1;
    }

  if (attr->mq_curmsgs != cnt)
    {
      printf ("mq_curmsgs %ld != %ld\n", attr->mq_curmsgs, cnt);
      result = 1;
    }

  return result;
}

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static int do_one_test ( mqd_t  q,
const char *  name,
int  nonblock 
) [static]

Definition at line 71 of file tst-mqueue1.c.

{
  int result = 0;

  unsigned char v []
    = { 0x32, 0x62, 0x22, 0x31, 0x11, 0x73, 0x61, 0x21, 0x72, 0x71, 0x81 };

  struct mq_attr attr;
  memset (&attr, 0xaa, sizeof (attr));
  if (mq_getattr (q, &attr) != 0)
    {
      printf ("mq_getattr failed: %m\n");
      result = 1;
    }
  else
    result |= check_attrs (&attr, nonblock, 0);

  if (mq_receive (q, (char *) &v[0], 1, NULL) != -1)
    {
      puts ("mq_receive on O_WRONLY mqd_t unexpectedly succeeded");
      result = 1;
    }
  else if (errno != EBADF)
    {
      printf ("mq_receive on O_WRONLY mqd_t did not fail with EBADF: %m\n");
      result = 1;
    }

  struct timespec ts;
  if (clock_gettime (CLOCK_REALTIME, &ts) == 0)
    --ts.tv_sec;
  else
    {
      ts.tv_sec = time (NULL) - 1;
      ts.tv_nsec = 0;
    }

  int ret;
  for (int i = 0; i < 10; ++i)
    {
      if (i & 1)
       ret = mq_send (q, (char *) &v[i], 1, v[i] >> 4);
      else
       ret = mq_timedsend (q, (char *) &v[i], 1, v[i] >> 4, &ts);

      if (ret)
       {
         printf ("mq_%ssend failed: %m\n", (i & 1) ? "" : "timed");
         result = 1;
       }
    }

  ret = mq_timedsend (q, (char *) &v[10], 1, 8, &ts);
  if (ret != -1)
    {
      puts ("mq_timedsend on full queue did not fail");
      result = 1;
    }
  else if (errno != (nonblock ? EAGAIN : ETIMEDOUT))
    {
      printf ("mq_timedsend on full queue did not fail with %s: %m\n",
             nonblock ? "EAGAIN" : "ETIMEDOUT");
      result = 1;
    }

  if (nonblock)
    {
      ret = mq_send (q, (char *) &v[10], 1, 8);
      if (ret != -1)
       {
         puts ("mq_send on full non-blocking queue did not fail");
         result = 1;
       }
      else if (errno != EAGAIN)
       {
         printf ("mq_send on full non-blocking queue did not fail"
                "with EAGAIN: %m\n");
         result = 1;
       }
    }

  memset (&attr, 0xaa, sizeof (attr));
  if (mq_getattr (q, &attr) != 0)
    {
      printf ("mq_getattr failed: %m\n");
      result = 1;
    }
  else
    result |= check_attrs (&attr, nonblock, 10);

  pid_t pid = fork ();
  if (pid == -1)
    {
      printf ("fork failed: %m\n");
      result = 1;
    }
  else if (pid == 0)
    {
      result = 0;

      if (mq_close (q) != 0)
       {
         printf ("mq_close in child failed: %m\n");
         result = 1;
       }

      q = mq_open (name, O_RDONLY | nonblock);
      if (q == (mqd_t) -1)
        {
         printf ("mq_open in child failed: %m\n");
         exit (1);
        }

      memset (&attr, 0xaa, sizeof (attr));
      if (mq_getattr (q, &attr) != 0)
       {
         printf ("mq_getattr failed: %m\n");
         result = 1;
       }
      else
       result |= check_attrs (&attr, nonblock, 10);

      unsigned char vr[11] = { };
      unsigned int prio;
      ssize_t rets;

      if (mq_send (q, (char *) &v[0], 1, 1) != -1)
       {
         puts ("mq_send on O_RDONLY mqd_t unexpectedly succeeded");
         result = 1;
       }
      else if (errno != EBADF)
       {
         printf ("mq_send on O_WRONLY mqd_t did not fail with EBADF: %m\n");
         result = 1;
       }

      for (int i = 0; i < 10; ++i)
       {
         if (i & 1)
           rets = mq_receive (q, (char *) &vr[i], 1, &prio);
         else
           rets = mq_timedreceive (q, (char *) &vr[i], 1, &prio, &ts);

         if (rets != 1)
           {
             if (rets == -1)
              printf ("mq_%sreceive failed: %m\n", (i & 1) ? "" : "timed");
             else
              printf ("mq_%sreceive returned %zd != 1\n",
                     (i & 1) ? "" : "timed", rets);
             result = 1;
           }
         else if (prio != (unsigned int) vr[i] >> 4)
           {
             printf ("unexpected priority %x for value %02x\n", prio,
                    vr[i]);
             result = 1;
           }
       }

      qsort (v, 10, 1, intcmp);
      if (memcmp (v, vr, 10) != 0)
       {
         puts ("messages not received in expected order");
         result = 1;
       }

      rets = mq_timedreceive (q, (char *) &vr[10], 1, &prio, &ts);
      if (rets != -1)
       {
         puts ("mq_timedreceive on empty queue did not fail");
         result = 1;
       }
      else if (errno != (nonblock ? EAGAIN : ETIMEDOUT))
       {
         printf ("mq_timedreceive on empty queue did not fail with %s: %m\n",
                nonblock ? "EAGAIN" : "ETIMEDOUT");
         result = 1;
       }

      if (nonblock)
       {
         ret = mq_receive (q, (char *) &vr[10], 1, &prio);
         if (ret != -1)
           {
             puts ("mq_receive on empty non-blocking queue did not fail");
             result = 1;
           }
         else if (errno != EAGAIN)
           {
             printf ("mq_receive on empty non-blocking queue did not fail"
                    "with EAGAIN: %m\n");
             result = 1;
           }
       }

      memset (&attr, 0xaa, sizeof (attr));
      if (mq_getattr (q, &attr) != 0)
       {
         printf ("mq_getattr failed: %m\n");
         result = 1;
       }
      else
       result |= check_attrs (&attr, nonblock, 0);

      if (mq_close (q) != 0)
       {
         printf ("mq_close in child failed: %m\n");
         result = 1;
       }

      exit (result);
    }

  int status;
  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
    {
      printf ("waitpid failed: %m\n");
      kill (pid, SIGKILL);
      result = 1;
    }
  else if (!WIFEXITED (status) || WEXITSTATUS (status))
    {
      printf ("child failed: %d\n", status);
      result = 1;
    }

  memset (&attr, 0xaa, sizeof (attr));
  if (mq_getattr (q, &attr) != 0)
    {
      printf ("mq_getattr failed: %m\n");
      result = 1;
    }
  else
    result |= check_attrs (&attr, nonblock, 0);

  return result;
}

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static int do_test ( void  ) [static]

Definition at line 313 of file tst-mqueue1.c.

{
  int result = 0;

  char name[sizeof "/tst-mqueue1-" + sizeof (pid_t) * 3];
  snprintf (name, sizeof (name), "/tst-mqueue1-%u", getpid ());

  struct mq_attr attr = { .mq_maxmsg = 10, .mq_msgsize = 1 };
  mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_WRONLY, 0600, &attr);

  if (q == (mqd_t) -1)
    {
      printf ("mq_open failed with: %m\n");
      return result;
    }
  else
    add_temp_mq (name);

  result |= do_one_test (q, name, 0);

  mqd_t q2 = mq_open (name, O_WRONLY | O_NONBLOCK);
  if (q2 == (mqd_t) -1)
    {
      printf ("mq_open failed with: %m\n");
      q2 = q;
      result = 1;
    }
  else
    {
      if (mq_close (q) != 0)
       {
         printf ("mq_close in parent failed: %m\n");
         result = 1;
       }

      q = q2;
      result |= do_one_test (q, name, O_NONBLOCK);

      if (mq_getattr (q, &attr) != 0)
       {
         printf ("mq_getattr failed: %m\n");
         result = 1;
       }
      else
       {
         attr.mq_flags ^= O_NONBLOCK;

         struct mq_attr attr2;
         memset (&attr2, 0x55, sizeof (attr2));
         if (mq_setattr (q, &attr, &attr2) != 0)
           {
             printf ("mq_setattr failed: %m\n");
             result = 1;
           }
         else if (attr.mq_flags != (attr2.mq_flags ^ O_NONBLOCK)
                 || attr.mq_maxmsg != attr2.mq_maxmsg
                 || attr.mq_msgsize != attr2.mq_msgsize
                 || attr.mq_curmsgs != 0
                 || attr2.mq_curmsgs != 0)
           {
             puts ("mq_setattr returned unexpected values in *omqstat");
             result = 1;
           }
         else
           {
             result |= do_one_test (q, name, 0);

             if (mq_setattr (q, &attr2, NULL) != 0)
              {
                printf ("mq_setattr failed: %m\n");
                result = 1;
              }
             else
              result |= do_one_test (q, name, O_NONBLOCK);
           }
       }
    }

  if (mq_unlink (name) != 0)
    {
      printf ("mq_unlink failed: %m\n");
      result = 1;
    }

  if (mq_close (q) != 0)
    {
      printf ("mq_close in parent failed: %m\n");
      result = 1;
    }

  if (mq_close (q) != -1)
    {
      puts ("second mq_close did not fail");
      result = 1;
    }
  else if (errno != EBADF)
    {
      printf ("second mq_close did not fail with EBADF: %m\n");
      result = 1;
    }

  return result;
}

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static int intcmp ( const void *  a,
const void *  b 
) [static]

Definition at line 33 of file tst-mqueue1.c.

{
  if (*(unsigned char *)a < *(unsigned char *)b)
    return 1;
  if (*(unsigned char *)a > *(unsigned char *)b)
    return -1;
  return 0;
}

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