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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# (c) Copyright 2003-2008 Hewlett-Packard Development Company, L.P.
#
# 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
#
# Author: Don Welch
#
__version__ = '0.1'
__title__ = "Services and Status System Tray Device I/O Child Process"
__mod__ = 'hpdio'
__doc__ = "Provides device I/O process isolation for system tray application."
# StdLib
import sys
import struct
import os
import time
import Queue
import select
from cPickle import dumps, HIGHEST_PROTOCOL
# Local
from base.g import *
from base.codes import *
from base import utils, device, status, models
# dBus
try:
from dbus import lowlevel, SessionBus
except ImportError:
log.error("dbus failed to load (python-dbus ver. 0.80+ required). Exiting...")
sys.exit(1)
# Globals
PIPE_BUF = 4096
session_bus = None
r2, w3 = None, None
devices = {} # { 'device_uri' : device.Device(), ... }
def send_message(device_uri, event_code, bytes_written=0):
args = [device_uri, '', event_code, prop.username, 0, '', '', bytes_written]
msg = lowlevel.SignalMessage('/', 'com.hplip.StatusService', 'Event')
msg.append(signature='ssisissi', *args)
SessionBus().send_message(msg)
def run(read_pipe2=None, # pipe from hpssd
write_pipe3=None): # pipe to hpssd
global r2, w3
tmp_dir = '/tmp'
os.umask(0111)
try:
log.set_module("hp-systray(hpdio)")
log.debug("PID=%d" % os.getpid())
r2, w3 = read_pipe2, write_pipe3
fmt = "80s80sI32sI80sf" # TODO: Move to Event class
fmt_size = struct.calcsize(fmt)
response = {}
dev = None
m = ''
while True:
try:
r, w, e = select.select([r2], [], [r2], 1.0)
except KeyboardInterrupt:
break
except select.error, e:
if e[0] == errno.EINTR:
continue
else:
break
if not r: continue
if e: break
m = ''.join([m, os.read(r2, fmt_size)])
if not m:
break
while len(m) >= fmt_size:
response.clear()
event = device.Event(*struct.unpack(fmt, m[:fmt_size]))
m = m[fmt_size:]
action = event.event_code
device_uri = event.device_uri
log.debug("Handling event...")
event.debug()
send_message(device_uri, EVENT_DEVICE_UPDATE_ACTIVE)
if action in (EVENT_DEVICE_UPDATE_REQUESTED, EVENT_POLLING_REQUEST):
#try:
if 1:
#log.debug("%s starting for %s" % (ACTION_NAMES[action], device_uri))
try:
dev = devices[device_uri]
except KeyError:
dev = devices[device_uri] = device.Device(device_uri, disable_dbus=True)
try:
#print "Device.open()"
dev.open()
except Error, e:
log.error(e.msg)
response = {'error-state': ERROR_STATE_ERROR,
'device-state': DEVICE_STATE_NOT_FOUND,
'status-code' : EVENT_ERROR_DEVICE_IO_ERROR}
if dev.device_state == DEVICE_STATE_NOT_FOUND:
dev.error_state = ERROR_STATE_ERROR
else:
if action == EVENT_DEVICE_UPDATE_REQUESTED:
try:
#print "Device.queryDevice()"
dev.queryDevice()
except Error, e:
log.error("Query device error (%s)." % e.msg)
dev.error_state = ERROR_STATE_ERROR
dev.status_code = EVENT_ERROR_DEVICE_IO_ERROR
response = dev.dq
#print response
log.debug("Device state = %d" % dev.device_state)
log.debug("Status code = %d" % dev.status_code)
log.debug("Error state = %d" % dev.error_state)
else: # EVENT_POLLING_REQUEST
try:
dev.pollDevice()
except Error, e:
log.error("Poll device error (%s)." % e.msg)
dev.error_state = ERROR_STATE_ERROR
else:
response = {'test' : 1}
#finally:
if 1:
if dev is not None:
dev.close()
#thread_activity_lock.release()
elif action == EVENT_USER_CONFIGURATION_CHANGED:
pass
elif action == EVENT_SYSTEMTRAY_EXIT:
log.debug("Exiting")
sys.exit(1)
send_message(device_uri, EVENT_DEVICE_UPDATE_INACTIVE)
if action == EVENT_DEVICE_UPDATE_REQUESTED:
#print response
data = dumps(response, HIGHEST_PROTOCOL)
log.debug("Sending data through pipe to hpssd...")
total_written = 0
while True:
total_written += os.write(w3, data[:PIPE_BUF])
data = data[PIPE_BUF:]
if not data:
break
log.debug("Wrote %d bytes" % total_written)
send_message(device_uri, EVENT_DEVICE_UPDATE_REPLY, total_written)
elif action == EVENT_POLLING_REQUEST:
# TODO: Translate into event: scan requested, copy requested, etc.. send as event
#try:
# os.write
pass
except KeyboardInterrupt:
log.debug("Ctrl-C: Exiting...")
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