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gr33n7007h/dancing_leds.rb

Created June 14, 2015 23:22
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dancing_leds.rb
#!/usr/bin/env ruby
# man ioctl_list | grep KDSETLED
KDSETLED = 0x00004B32
begin
# needs root privs
loop{ open('/dev/console').ioctl(KDSETLED, rand(0..8)) }
rescue Errno::EACCES
STDERR.puts "needs root privs to run"
exit -1
end
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