Function sys_mkdirat

freebsd/kern/vfs_syscalls.c:3742–3747

};
#endif
int
sys_mkdirat(struct thread *td, struct mkdirat_args *uap)
{

	return (kern_mkdirat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode));
}

int
kern_mkdirat(struct thread *td, int fd, const char *path, enum uio_seg segflg,