MQ_CLOSE(3)                         Linux Programmer's Manual                         MQ_CLOSE(3)



NAME
       mq_close - close a message queue descriptor

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.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The mq_close() function is thread-safe.

CONFORMING TO
       POSIX.1-2001.

NOTES
       All open  message  queues  are  automatically  closed  on  process  termination,  or  upon
       execve(2).

SEE ALSO
       mq_getattr(3), mq_notify(3), mq_open(3), mq_receive(3), mq_send(3), mq_unlink(3), mq_over‐
       view(7)

COLOPHON
       This page is part of release 3.74 of the Linux man-pages project.  A  description  of  the
       project,  information  about  reporting  bugs, and the latest version of this page, can be
       found at http://www.kernel.org/doc/man-pages/.



Linux                                       2014-06-13                                MQ_CLOSE(3)