mq_getsetattr
(2)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);