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# mw_load.py -- display load averages in a modewindow
#
# Copyright (C) 2001 Meik Hellmund <hellmund@itp.uni-leipzig.de>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# contributed by Meik Hellmund <hellmund@itp.uni-leipzig,de>, heavily reusing
# other plwm code
#
# Two methods are tried to get the load averages:
# LinuxLoad - read from a file (/proc/loadavg)
# UnixLoad - read output from a command (/usr/bin/uptime)
# In both cases, the output is split on whitespaces and, depending on the
# displaylist variable, some elements of this list are shown.
#
#
# configuration variables:
# mw_load_position, mw_load_justification: describe the position in
# the modeline, as usual
# mw_load.LinuxLoad.loadfile: name of file to read
# mw_load.LinuxLoad.displaylist: list of entries to be displayed
# 0,1,2 : 1,5,15-min load average
# 4 : no. of running processes and total number of processes
# mw_load.UnixLoad.loadcmd: command which prints load averages
# mw_load.UnixLoad.displaylist: list of entries to be displayed
# (for my uptime command, numbers 9,10 and 11 are the load averages)
from plwm import modewindow, event, wmanager
import os.path
import string
import sys
import re
import errno
LoadTimerEvent = event.new_event_type()
class LinuxLoad:
loadfile = "/proc/loadsavg"
displaylist = [0,1,2,3]
def probe(self):
return os.path.isfile(self.loadfile)
def get(self, wm):
f=open(self.loadfile,'r')
l=string.split(f.readline())
f.close()
str=""
for x in self.displaylist:
str = str + l[x] + " "
return string.strip(str)
class UnixLoad:
loadcmd = "/usr/bin/uptime"
load_re = re.compile(r'(\d+.\d\d)[, ]+(\d+.\d\d)[, ]+(\d+.\d\d)')
def probe(self):
return os.path.isfile(self.loadcmd)
def get(self, wm):
pipes = wm.system(self.loadcmd, redirect = 1)
out = pipes[1]
try:
s = out.readline()
except IOError, err:
if err.errno == errno.EINTR:
s = out.readline()
out.close()
wmanager.debug('mw_load', 'output: %s', s)
m = self.load_re.search(s)
if m:
return string.join(m.groups(), ' ')
else:
return ''
load_interfaces = [ LinuxLoad(),
UnixLoad() ]
class ModeWindowLoad:
mw_load_position = 0.05
mw_load_justification = modewindow.LEFT
def __wm_init__(self):
for i in load_interfaces:
if i.probe():
self.mw_load_interface = i
break
else:
sys.stderr.write('%s: failed to find a load interface, disabling mw_load\n' % sys.argv[0])
return
self.mw_load_message = modewindow.Message(self.mw_load_position,
self.mw_load_justification)
for s in self.screens:
s.modewindow_add_message(self.mw_load_message)
self.dispatch.add_handler(LoadTimerEvent, self.mw_load_tick)
self.mw_load_update()
def mw_load_update(self):
msg = self.mw_load_interface.get(self)
self.mw_load_message.set_text(msg)
self.events.add_timer(event.TimerEvent(LoadTimerEvent, after = 60))
def mw_load_tick(self, evt):
self.mw_load_update()
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