MQ_GETSETATTR(2) Linux Programmer's Manual MQ_GETSETATTR(2)

mq_getsetattr - get/set message queue attributes

#include <mqueue.h>           /* Definition of struct mq_attr */
#include <sys/syscall.h>      /* Definition of SYS_* constants */
#include <unistd.h>
int syscall(SYS_mq_getsetattr, mqd_t mqdes,
            const struct mq_attr *newattr, struct mq_attr *oldattr);

Do not use this system call.

This is the low-level system call used to implement mq_getattr(3) and mq_setattr(3). For an explanation of how this system call operates, see the description of mq_setattr(3).

This interface is nonstandard; avoid its use.

Never call it unless you are writing a C library!

mq_getattr(3), mq_overview(7)

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2021-03-22 Linux