text: mq_close - close a message queue descriptor
  Current Version:
  Linux Kernel - 3.80
  Synopsis
  #include <mqueue.h> int mq_close(mqd_t mqdes);
  Link with -lrt.
  Description
  mq_close() closes the message queue descriptor mqdes.
  If the calling process has attached a notification request to this message queue via mqdes, then this request is removed, and another process can now attach a notification request.
  Return Value
  On success mq_close() returns 0; on error, -1 is returned, with errno set to indicate the error.
  Errors
  - EBADF
  - The descriptor specified in mqdes is invalid.
  Conforming To
  POSIX.1-2001.
  See Also
  mq_getattr(3), mq_notify(3), mq_open(3), mq_receive(3), mq_send(3), mq_unlink(3), mq_overview(7)