iopctl —
a program to control IOP devices
  
    | iopctl | [ -fctldev]
      command [tid] | 
The iopctl command can be used to interrogate and
  control I2O devices.
The following options are available:
  - -fctldev
- Specify the control device to use. The default is
      /dev/iop0.
The following commands are available:
  - reconfig
- Reconfigure the IOP: ask all bus ports to rescan their busses, and attach
      or detach devices to and from the system as necessary.
- showddmid tid
- Retrieve and display the DDM (device driver module) identity parameter
      group from the specified target.
- showdevid tid
- Retrieve and display the device identity parameter group from the
      specified target.
- showlct
- Display the driver's private copy of the logical configuration table. This
      copy of the LCT matches the current device configuration, but is not
      necessarily the latest available version of the LCT.
- showstatus
- Display the current status of the IOP.
- showtidmap
- Display the device to TID map.
  - /dev/iopu
- control device for IOP unit u
Theiopctl command first appeared in
  NetBSD 1.5.3.