mq_getsetattr − get/set message queue attributes #include<sys/types.h> #include<mqueue.h> , struct mq_attr *int mq_getsetattr(mqd_t mqdes ); struct mq_attr *oldattr There is no glibc wrapper for this system call; see NOTES. Do not use this system call. This is the low‐level system call used to implement and For an explanation of how this system call operates, see the description of This interface is nonstandard; avoid its use. Glibc does not provide a wrapper for this system call; call it using (Actually, never call it unless you are writing a C library!) This page is part of release 5.07 of the Linux man‐pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man−pages/.