MQ_CLOSE(3POSIX)

📦 version 2017a, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu resolute, ubuntu stonking

💖 MQ_CLOSE(3POSIX) 💖

okay so bestie, welcome to the POSIX Programmer's Manual ✨ this little page lives in that collection, and it's all about mq_close().

🌸 PROLOG 🌸

fr fr, read this first: this manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (so like, go check the corresponding Linux manual page for the deets on Linux behavior), or honestly the interface may not even be implemented on Linux at all. 💀 not me warning you before you even start.

✨ NAME ✨

mq_close — close a message queue (REALTIME)

🎀 SYNOPSIS 🎀

#include <mqueue.h>

int mq_close(mqd_t mqdes);

🦋 DESCRIPTION 🦋

so the mq_close() function shall remove the association between the message queue descriptor, mqdes, and its message queue. that's the whole vibe. 🫶

⚠️ okay important: the results of using this message queue descriptor after a successful return from this mq_close(), and until the return of this message queue descriptor from a subsequent mq_open(), are undefined. like, undefined undefined. don't do it. 🙈

and also, if the process has successfully attached a notification request to the message queue via this mqdes, this attachment shall be removed, and the message queue is available for another process to attach for notification. so you're basically freeing up the spot for the next girlie 👑

💅 RETURN VALUE 💅

Upon successful completion, the mq_close() function shall return a value of 0 — slay. otherwise, the function shall return a value of -1 and set errno to indicate the error. 😭 classic.

🔥 ERRORS 🔥

The mq_close() function shall fail if:

  • EBADF — The mqdes argument is not a valid message queue descriptor. bestie that's not a real mqdes, pls. 💀

The following sections are informative.

🌈 EXAMPLES 🌈

None.

💜 APPLICATION USAGE 💜

None.

⭐ RATIONALE ⭐

None.

🧚 FUTURE DIRECTIONS 🧚

None.

👑 SEE ALSO 👑

  • mq_open()
  • mq_unlink()
  • msgctl()
  • msgget()
  • msgrcv()
  • msgsnd()

The Base Definitions volume of POSIX.1‐2017, <mqueue.h>

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

and that's the whole page, bestie 💖 this edition came to you from IEEE/The Open Group, dated 2017, under the manual name MQ_CLOSE(3POSIX) — periodt. 🌸✨🦋

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