From: Martin Pirker <crf@...>
Date: 2004-08-24T06:05:42+09:00
Subject: Re: ruby + linux /proc/acpi deadlock?

William Morgan <wmorgan-ruby-talk@masanjin.net> wrote:
> I'm working on a predictive battery monitor in Ruby.

back when I was starting in Ruby one of the first small tries was...
(fix code first, terminal is eating some chars)

run with no window decoration
not very pretty, but does the job till today :-)

Martin

--------------------------------------------------------------------------

$stdout.sync = true

def resize (w,h)                       # resize terminal
  printf("\033[8;#{h};#{w}t")
end

def readme
  r1 = IO.readlines("/proc/acpi/battery/BAT1/state").grep(/remaining/)
  r1 = /\s*(\d*)\smWh/.match(r1[0])[1].to_s if r1.size == 1
  return r1
end

resize (10,1)

r = IO.readlines("/proc/acpi/battery/BAT1/state")
if /present.+no/ === r[0] then
 printf("\n no batt ")
 sleep 3
 exit 1
end

or1 = readme
printf("\n%s 000",or1.rjust(5).tr(" ","0"))
nr1 = readme

loop do
  nr1 = readme
  if (nr1 != or1)
    if or1.to_i <3000 then
      'xgamma -gamma 0.3'      # <---- fix me!
      sleep 0.3
      'xgamma -gamma 1.0'      # <---- fix me!
    end
    printf("\n%s %s",nr1.rjust(5).tr(" ","0"),(or1.to_i-nr1.to_i).to_s.rjust(3).tr(" ","0"))
    or1 = nr1
  end
  sleep 15
end