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+'\" et
+.TH MQ_SETATTR "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.\"
+.SH NAME
+mq_setattr
+\(em set message queue attributes
+(\fBREALTIME\fP)
+.SH SYNOPSIS
+.LP
+.nf
+#include <mqueue.h>
+.P
+int mq_setattr(mqd_t \fImqdes\fP, const struct mq_attr *restrict \fImqstat\fP,
+    struct mq_attr *restrict \fIomqstat\fP);
+.fi
+.SH DESCRIPTION
+The
+\fImq_setattr\fR()
+function shall set attributes associated with the open message queue
+description referenced by the message queue descriptor specified by
+.IR mqdes .
+.P
+The message queue attributes corresponding to the following members
+defined in the
+.BR mq_attr
+structure shall be set to the specified values upon successful
+completion of
+\fImq_setattr\fR():
+.IP "\fImq_flags\fP" 12
+The value of this member is the bitwise-logical OR of zero or more of
+O_NONBLOCK and any implementation-defined flags.
+.P
+The values of the
+.IR mq_maxmsg ,
+.IR mq_msgsize ,
+and
+.IR mq_curmsgs
+members of the
+.BR mq_attr
+structure shall be ignored by
+\fImq_setattr\fR().
+.P
+If
+.IR omqstat
+is non-NULL, the
+\fImq_setattr\fR()
+function shall store, in the location referenced by
+.IR omqstat ,
+the previous message queue attributes and the current queue status.
+These values shall be the same as would be returned by a call to
+\fImq_getattr\fR()
+at that point.
+.SH "RETURN VALUE"
+Upon successful completion, the function shall return a value of zero
+and the attributes of the message queue shall have been changed as
+specified.
+.P
+Otherwise, the message queue attributes shall be unchanged, and the
+function shall return a value of \-1 and set
+.IR errno
+to indicate the error.
+.SH ERRORS
+The
+\fImq_setattr\fR()
+function shall fail if:
+.TP
+.BR EBADF
+The
+.IR mqdes
+argument is not a valid message queue descriptor.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fImq_open\fR\^(\|)",
+.IR "\fImq_send\fR\^(\|)",
+.IR "\fImsgctl\fR\^(\|)",
+.IR "\fImsgget\fR\^(\|)",
+.IR "\fImsgrcv\fR\^(\|)",
+.IR "\fImsgsnd\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2017,
+.IR "\fB<mqueue.h>\fP"
+.\"
+.SH COPYRIGHT
+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 .
+.PP
+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 .