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### Author: Dag Wieers <dag@wieers.com> class dstat_plugin(dstat): """ Power usage information from ACPI. Displays the power usage in watt per hour of your system's battery using ACPI information. This information is only available when the battery is being used (or being charged). """ def __init__(self): self.name = 'power' self.nick = ( 'usage', ) self.vars = ( 'rate', ) self.type = 'f' self.width = 5 self.scale = 1 self.rate = 0 self.batteries = [] for battery in os.listdir('/proc/acpi/battery/'): for line in dopen('/proc/acpi/battery/'+battery+'/state').readlines(): l = line.split() if len(l) < 2: continue self.batteries.append(battery) break def check(self): if not self.batteries: raise Exception, 'No battery information found, no power usage statistics' def extract(self): amperes_drawn = 0 voltage = 0 watts_drawn = 0 for battery in self.batteries: for line in dopen('/proc/acpi/battery/'+battery+'/state').readlines(): l = line.split() if len(l) < 3: continue if l[0] == 'present:' and l[1] != 'yes': continue if l[0:2] == ['charging','state:'] and l[2] != 'discharging': voltage = 0 break if l[0:2] == ['present','voltage:']: voltage = int(l[2]) / 1000.0 elif l[0:2] == ['present','rate:'] and l[3] == 'mW': watts_drawn = int(l[2]) / 1000.0 elif l[0:2] == ['present','rate:'] and l[3] == 'mA': amperes_drawn = int(l[2]) / 1000.0 self.rate = self.rate + watts_drawn + voltage * amperes_drawn ### Return error if we found no information if self.rate == 0: self.rate = -1 if op.update: self.val['rate'] = self.rate / elapsed else: self.val['rate'] = self.rate if step == op.delay: self.rate = 0 # vim:ts=4:sw=4:et