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103 lines
3.1 KiB
103 lines
3.1 KiB
10 years ago
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--[[
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smapi.lua
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Interface with thinkpad battery information
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Licensed under GNU General Public License v2
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* (c) 2013, Conor Heine
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--]]
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local first_line = require("lain.helpers").first_line
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local string = { format = string.format }
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local tonumber = tonumber
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local setmetatable = setmetatable
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local smapi = {}
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local apipath = "/sys/devices/platform/smapi"
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-- Most are readable values, but some can be written to (not implemented, yet?)
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local readable = {
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barcoding = true,
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charging_max_current = true,
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charging_max_voltage = true,
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chemistry = true,
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current_avg = true,
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current_now = true,
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cycle_count = true,
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design_capacity = true,
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design_voltage = true,
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dump = true,
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first_use_date = true,
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force_discharge = false,
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group0_voltage = true,
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group1_voltage = true,
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group2_voltage = true,
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group3_voltage = true,
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inhibit_charge_minutes = false,
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installed = true,
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last_full_capacity = true,
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manufacture_date = true,
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manufacturer = true,
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model = true,
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power_avg = true,
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power_now = true,
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remaining_capacity = true,
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remaining_charging_time = true,
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remaining_percent = true,
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remaining_percent_error = true,
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remaining_running_time = true,
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remaining_running_time_now = true,
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serial = true,
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start_charge_thresh = false,
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state = true,
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stop_charge_thresh = false,
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temperature = true,
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voltage = true,
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}
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function smapi:battery(name)
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local bat = {}
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bat.name = name
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bat.path = apipath .. "/" .. name
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function bat:get(item)
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return self.path ~= nil and readable[item] and first_line(self.path .. "/" .. item) or nil
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end
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function bat:installed()
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return self:get("installed") == "1"
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end
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function bat:status()
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return self:get('state')
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end
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-- Remaining time can either be time until battery dies or time until charging completes
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function bat:remaining_time()
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local time_val = bat_now.status == 'discharging' and 'remaining_running_time' or 'remaining_charging_time'
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local mins_left = self:get(time_val)
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if mins_left:find("^%d+") == nil
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then
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return "N/A"
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end
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local hrs = math.floor(mins_left / 60)
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local min = mins_left % 60
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return string.format("%02d:%02d", hrs, min)
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end
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function bat:percent()
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return tonumber(self:get("remaining_percent"))
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end
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return setmetatable(bat, {__metatable = false, __newindex = false})
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end
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return smapi
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