mq_close(3)

1MQ_CLOSE(3)                Linux Programmer's Manual               MQ_CLOSE(3)
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NAME

6       mq_close - close a message queue descriptor
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SYNOPSIS

9       #include <mqueue.h>
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11       int mq_close(mqd_t mqdes);
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13       Link with -lrt.
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DESCRIPTION

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

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

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

30       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
31       tributes(7).
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33       ┌────────────────────────────────────────────┬───────────────┬─────────┐
34       │Interface                                   │ Attribute     │ Value   │
35       ├────────────────────────────────────────────┼───────────────┼─────────┤
36       │mq_close()                                  │ Thread safety │ MT-Safe │
37       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

40       POSIX.1-2001, POSIX.1-2008.
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NOTES

43       All  open  message  queues are automatically closed on process termina‐
44       tion, or upon execve(2).
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COLOPHON

51       This  page  is  part of release 5.13 of the Linux man-pages project.  A
52       description of the project, information about reporting bugs,  and  the
53       latest     version     of     this    page,    can    be    found    at
54       https://www.kernel.org/doc/man-pages/.
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58Linux                             2021-03-22                       MQ_CLOSE(3)