1mq_close(3)                Library Functions Manual                mq_close(3)
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NAME

6       mq_close - close a message queue descriptor
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LIBRARY

9       Real-time library (librt, -lrt)
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SYNOPSIS

12       #include <mqueue.h>
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14       int mq_close(mqd_t mqdes);
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DESCRIPTION

17       mq_close() closes the message queue descriptor mqdes.
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19       If  the calling process has attached a notification request (see mq_no‐
20       tify(3)) to this message queue via mqdes, then this request is removed,
21       and another process can now attach a notification request.
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RETURN VALUE

24       On  success  mq_close() returns 0; on error, -1 is returned, with errno
25       set to indicate the error.
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ERRORS

28       EBADF  The message queue descriptor specified in mqdes is invalid.
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ATTRIBUTES

31       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
32       tributes(7).
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34       ┌────────────────────────────────────────────┬───────────────┬─────────┐
35       │Interface                                   │ Attribute     │ Value   │
36       ├────────────────────────────────────────────┼───────────────┼─────────┤
37       │mq_close()                                  │ Thread safety │ MT-Safe │
38       └────────────────────────────────────────────┴───────────────┴─────────┘
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STANDARDS

41       POSIX.1-2008.
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HISTORY

44       POSIX.1-2001.
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NOTES

47       All   open   message   queues   are  automatically  closed  on  process
48       termination, or upon execve(2).
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SEE ALSO

51       mq_getattr(3),  mq_notify(3),  mq_open(3),  mq_receive(3),  mq_send(3),
52       mq_unlink(3), mq_overview(7)
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56Linux man-pages 6.05              2023-07-20                       mq_close(3)
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