diff options
Diffstat (limited to 'contrib/batproc.lua')
-rw-r--r-- | contrib/batproc.lua | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/contrib/batproc.lua b/contrib/batproc.lua new file mode 100644 index 0000000..dac4d44 --- /dev/null +++ b/contrib/batproc.lua @@ -0,0 +1,85 @@ +--------------------------------------------------- +-- Licensed under the GNU General Public License v2 +-- * (c) 2010, Adrian C. <anrxc@sysphere.org> +--------------------------------------------------- + +-- {{{ Grab environment +local tonumber = tonumber +local io = { open = io.open } +local setmetatable = setmetatable +local math = { + min = math.min, + floor = math.floor +} +local string = { + find = string.find, + match = string.match, + format = string.format +} +-- }}} + + +-- Batproc: provides state, charge, and remaining time for a requested battery using procfs +module("vicious.contrib.batproc") + + +-- {{{ Battery widget type +local function worker(format, batid) + local battery_state = { + ["full"] = "↯", + ["unknown"] = "⌁", + ["charged"] = "↯", + ["charging"] = "+", + ["discharging"] = "-" + } + + -- Get /proc/acpi/battery info + local f = io.open("/proc/acpi/battery/"..batid.."/info") + -- Handler for incompetent users + if not f then return {battery_state["unknown"], 0, "N/A"} end + local infofile = f:read("*all") + f:close() + + -- Check if the battery is present + if infofile == nil or string.find(infofile, "present:[%s]+no") then + return {battery_state["unknown"], 0, "N/A"} + end + + -- Get capacity information + local capacity = string.match(infofile, "last full capacity:[%s]+([%d]+).*") + + + -- Get /proc/acpi/battery state + local f = io.open("/proc/acpi/battery/"..batid.."/state") + local statefile = f:read("*all") + f:close() + + -- Get state information + local state = string.match(statefile, "charging state:[%s]+([%a]+).*") + local state = battery_state[state] or battery_state["unknown"] + + -- Get charge information + local rate = string.match(statefile, "present rate:[%s]+([%d]+).*") + local remaining = string.match(statefile, "remaining capacity:[%s]+([%d]+).*") + + + -- Calculate percentage (but work around broken BAT/ACPI implementations) + local percent = math.min(math.floor(remaining / capacity * 100), 100) + + -- Calculate remaining (charging or discharging) time + if state == "+" then + timeleft = (tonumber(capacity) - tonumber(remaining)) / tonumber(rate) + elseif state == "-" then + timeleft = tonumber(remaining) / tonumber(rate) + else + return {state, percent, "N/A"} + end + local hoursleft = math.floor(timeleft) + local minutesleft = math.floor((timeleft - hoursleft) * 60 ) + local time = string.format("%02d:%02d", hoursleft, minutesleft) + + return {state, percent, time} +end +-- }}} + +setmetatable(_M, { __call = function(_, ...) return worker(...) end }) |