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User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7

Description of problem:
I am unable to create posix message queues with a mq_maxmsg > 10.  The default mq_open will open a queue of 10 messages of 8192 bytes.  Queue lengths of 100 worked on previous versions of glibc.

{{{

#include <stdio.h>
#include <mqueue.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <sys/wait.h>
#include <errno.h>

#define NAMESIZE 50
#define QUEUESIZE 100

int main ()
{
  mqd_t myMq;
  struct mq_attr attr;
  struct mq_attr getattr;
  char qname[NAMESIZE];

  sprintf(qname, "/mq_open_name_%d", getpid());

  attr.mq_msgsize = 4;
  attr.mq_maxmsg  = QUEUESIZE;

  myMq = mq_open(qname, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR, &attr);
  if (myMq == -1)
  {
    printf("errno=%d description=%s\n", errno, strerror(errno));
  } else {
    printf("Opened queue\n");
    mq_getattr(myMq, &getattr);
    printf(Message Size=%ld Queue Length=%ld\n",
           getattr.mq_msgsize, mq_mq_maxmsg );
    mq_close(myMq);
    mq_unlink(qname);
  }
  return 0;
}


}}}


Compile Command: g++ -o mqueue mqueue.cpp -lrt

Version-Release number of selected component (if applicable):
glibc-2.3.5-10.3

How reproducible:
Always

Steps to Reproduce:
1. Compile the given program with a QUEUESIZE > 10
2. Review output.
  

Actual Results:  errno=22 description=Invalid argument

Expected Results:  Opened queue
Message Size=4 Queue Length=QUEUESIZE

Additional info:

I have run this code on a ppc64 and i386. Kernel Version 2.6.13-1.1526_FC4 and 2.6.11.1.1369_FC4 respectively with identical results.