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mq_close(3p) [posix man page]

MQ_CLOSE(3P)						     POSIX Programmer's Manual						      MQ_CLOSE(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
mq_close -- close a message queue (REALTIME) SYNOPSIS
#include <mqueue.h> int mq_close(mqd_t mqdes); DESCRIPTION
The mq_close() function shall remove the association between the message queue descriptor, mqdes, and its message queue. The results of using this message queue descriptor after successful return from this mq_close(), and until the return of this message queue descriptor from a subsequent mq_open(), are undefined. 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. RETURN VALUE
Upon successful completion, the mq_close() function shall return a value of zero; otherwise, the function shall return a value of -1 and set errno to indicate the error. ERRORS
The mq_close() function shall fail if: EBADF The mqdes argument is not a valid message queue descriptor. 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.1-2008, <mqueue.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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 Stan- dard is the referee document. The original Standard can be obtained online at http://www.unix.org/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 . IEEE
/The Open Group 2013 MQ_CLOSE(3P)

Check Out this Related Man Page

MQ_GETATTR(3P)						     POSIX Programmer's Manual						    MQ_GETATTR(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
mq_getattr - get message queue attributes (REALTIME) SYNOPSIS
#include <mqueue.h> int mq_getattr(mqd_t mqdes, struct mq_attr *mqstat); DESCRIPTION
The mq_getattr() function shall obtain status information and attributes of the message queue and the open message queue description asso- ciated with the message queue descriptor. The mqdes argument specifies a message queue descriptor. The results shall be returned in the mq_attr structure referenced by the mqstat argument. Upon return, the following members shall have the values associated with the open message queue description as set when the message queue was opened and as modified by subsequent mq_setattr() calls: mq_flags. The following attributes of the message queue shall be returned as set at message queue creation: mq_maxmsg, mq_msgsize. Upon return, the following members within the mq_attr structure referenced by the mqstat argument shall be set to the current state of the message queue: mq_curmsgs The number of messages currently on the queue. RETURN VALUE
Upon successful completion, the mq_getattr() function shall return zero. Otherwise, the function shall return -1 and set errno to indicate the error. ERRORS
The mq_getattr() function shall fail if: EBADF The mqdes argument is not a valid message queue descriptor. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
mq_open(), mq_send(), mq_setattr(), mq_timedsend(), msgctl(), msgget(), msgrcv(), msgsnd(), the Base Definitions volume of IEEE Std 1003.1-2001, <mqueue.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 . IEEE
/The Open Group 2003 MQ_GETATTR(3P)
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