mount_sysctlfs —
mount sysctl namespace as a directory hierarchy
  
    | mount_sysctlfs | [ -r] [-omntopts] sysctlfs
      mount_point | 
The mount_sysctlfs program provides the
  sysctl(8) hierarchy through the
  file system namespace. It is possible to browse the tree, query node values
  and modify them. By default, the node contents are interpreted as ASCII. If
  the -r flag is given, the server uses raw mode and
  displays node contents as they are received from the kernel (binary).
The mount_sysctlfs utility first appeared in
  NetBSD 5.0.
Raw mode [-r] does not currently support node
  modification.