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NIIBE Yutaka's glog, Eight disks, three pegs, and just a little hack.

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Enhancement of code of USB HUB (3)
Gniibe implemented user space approach of usb power control (in the bullet train).

Here it is: hub-ctrl-2.c.

 HUB-CTRL  -  program to control port power/led of USB hub

  $ gcc -o hub-ctrl hub-ctrl.c -lusb

  # hub-ctrl -b 1 -d 2 -P 1 -p            // Power off at port 1
  # hub-ctrl -b 1 -d 2 -P 1 -p 1          // Power on at port 1
  # hub-ctrl -b 1 -d 2 -P 2 -l            // LED on at port 1

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