If I get a .24 kernel will I get apm support or must I build it in?
I don't know what needs to be done to get APM support. However,
I've attached a fairly simple Python script that will extract the
info you want from the /proc/acpi/battery/BAT*/{state,info} files.
Just "chmod ugo+x batt.py" after putting it somewhere in your
path, and it will return a percentage along with what should be
the state (charging or discharging). It should also handle
multiple batteries if you have them. Hope this helps,
-tim
#!/usr/bin/env python
import os, re
from itertools import chain
acpi_battery_path = "/proc/acpi/battery/"
STATE_FILE = 'state'
INFO_FILE = 'info'
extract_mha_re = re.compile(r'^[^:]*:\s*(\d+).*')
def extract_mha(prefix, line):
if line.startswith(prefix):
m = extract_mha_re.match(line)
if m:
return int(m.group(1))
return None
for battery in os.listdir(acpi_battery_path):
if not battery.startswith("BAT"): continue
battery_path = os.path.join(acpi_battery_path, battery)
if not os.path.isdir(battery_path): continue
current = max_cap = 0
state = "Unknown"
for line in chain(*map(
lambda s: file(os.path.join(battery_path, s)),
(STATE_FILE, INFO_FILE))):
line = line.strip().lower()
mha = extract_mha('remaining capacity:', line)
if mha: current = mha
mha = extract_mha('design capacity:', line)
if mha: max_cap = mha
if line.startswith("charging state:"):
state = line.split(':', 1)[1].strip()
print '%s: %i%% (%s)' % (
battery, (current * 100) / max_cap, state)
#!/usr/bin/env python
import os
import re
from itertools import chain
acpi_battery_path = "/proc/acpi/battery/"
STATE_FILE = 'state'
INFO_FILE = 'info'
extract_mha_re = re.compile(r'^[^:]*:\s*(\d+).*')
def extract_mha(prefix, line):
if line.startswith(prefix):
m = extract_mha_re.match(line)
if m:
return int(m.group(1))
return None
for battery in os.listdir(acpi_battery_path):
if not battery.startswith("BAT"): continue
battery_path = os.path.join(acpi_battery_path, battery)
if not os.path.isdir(battery_path): continue
current = max_cap = 0
state = "Unknown"
for line in chain(*map(
lambda s: file(os.path.join(battery_path, s)),
(STATE_FILE, INFO_FILE))):
line = line.strip().lower()
mha = extract_mha('remaining capacity:', line)
if mha: current = mha
mha = extract_mha('design capacity:', line)
if mha: max_cap = mha
if line.startswith("charging state:"):
state = line.split(':', 1)[1].strip()
print '%s: %i%% (%s)' % (
battery, (current * 100) / max_cap, state)
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