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-- Authors: Unknown
-- License: Public domain
-- Last Changed: Unknown
--
-- statusd_linuxbatt.lua
--
-- Public domain
--
-- Uses the /proc/acpi interface to get battery percentage.
--
-- Use the key "linuxbatt" to get the battery percentage; use
-- "linuxbatt_state" to get a symbol indicating charging "+",
-- discharging "-", or charged " ".
--
-- Now uses lua functions instead of bash, awk, dc. MUCH faster!
--
-- The "bat" option to the statusd settings for linuxbatt modifies which
-- battery we look at.
local defaults={
update_interval=15*1000,
bat=0,
important_threshold=30,
critical_threshold=10,
}
local settings=table.join(statusd.get_config("linuxbatt"), defaults)
function linuxbatt_do_find_capacity()
local f=io.open('/proc/acpi/battery/BAT'.. settings.bat ..'/info')
local infofile=f:read('*a')
f:close()
local i, j, capacity = string.find(infofile, 'last full capacity:%s*(%d+) .*')
return capacity
end
local capacity = linuxbatt_do_find_capacity()
function get_linuxbatt()
local f=io.open('/proc/acpi/battery/BAT'.. settings.bat ..'/state')
local statefile=f:read('*a')
f:close()
local i, j, remaining = string.find(statefile, 'remaining capacity:%s*(%d+) .*')
local percent = math.floor( remaining * 100 / capacity )
local i, j, statename = string.find(statefile, 'charging state:%s*(%a+).*')
if statename == "charging" then
return percent, "+"
elseif statename == "discharging" then
return percent, "-"
else
return percent, " "
end
end
function update_linuxbatt()
local perc, state = get_linuxbatt()
statusd.inform("linuxbatt", tostring(perc))
statusd.inform("linuxbatt_state", state)
if perc < settings.critical_threshold
then statusd.inform("linuxbatt_hint", "critical")
elseif perc < settings.important_threshold
then statusd.inform("linuxbatt_hint", "important")
else statusd.inform("linuxbatt_hint", "normal")
end
linuxbatt_timer:set(settings.update_interval, update_linuxbatt)
end
linuxbatt_timer = statusd.create_timer()
update_linuxbatt()
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