Current File : //usr/share/system-config-printer/troubleshoot/CheckUSBPermissions.py
#!/usr/bin/python3
## Printing troubleshooter
## Copyright (C) 2008, 2009, 2010, 2014 Red Hat, Inc.
## Authors:
## Tim Waugh <twaugh@redhat.com>
## 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
import glob
import os
import subprocess
from timedops import TimedSubprocess
import urllib.parse
from .base import *
from gi.repository import Gtk
class CheckUSBPermissions(Question):
def __init__ (self, troubleshooter):
Question.__init__ (self, troubleshooter, "Check USB permissions")
troubleshooter.new_page (Gtk.Label (), self)
def display (self):
self.answers = {}
answers = self.troubleshooter.answers
if answers['cups_queue_listed']:
if answers['is_cups_class']:
return False
cups_printer_dict = answers['cups_printer_dict']
device_uri = cups_printer_dict['device-uri']
elif answers.get ('cups_device_listed', False):
device_uri = answers['cups_device_uri']
else:
return False
(scheme, rest) = urllib.parse.splittype (device_uri)
if scheme not in ['hp', 'hpfax', 'usb', 'hal']:
return False
LSUSB = "/sbin/lsusb"
if not os.access (LSUSB, os.X_OK):
return False
GETFACL = "/usr/bin/getfacl"
if not os.access (GETFACL, os.X_OK):
return False
new_environ = os.environ.copy()
new_environ['LC_ALL'] = "C"
# Run lsusb
parent = self.troubleshooter.get_window ()
try:
self.op = TimedSubprocess (parent=parent,
args=[LSUSB, "-v"],
close_fds=True,
env=new_environ,
stdin=subprocess.DEVNULL,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(lsusb_stdout, lsusb_stderr, result) = self.op.run ()
except:
# Problem executing command.
return False
# Now parse it.
dev_by_id = {}
this_dev = None
for line in lsusb_stdout:
if (this_dev is not None and
((line.find ("bInterfaceClass") != -1 and
line.find ("7 Printer") != -1) or
(line.find ("bInterfaceSubClass") != -1 and
line.find ("1 Printer") != -1))):
mfr = dev_by_id.get (this_mfr_id, {})
mdl = mfr.get (this_mdl_id, [])
mdl.append (this_dev)
mfr[this_mdl_id] = mdl
dev_by_id[this_mfr_id] = mfr
this_dev = None
continue
separators = [ ('Bus ', 3),
(' Device ', 3),
(': ID ', 4),
(':', 4),
(' ', -1)]
fields = []
i = 0
p = line
while i < len (separators):
(sep, length) = separators[i]
if not p.startswith (sep):
break
start = len (sep)
if length == -1:
end = len (p)
fields.append (p[start:])
else:
end = start + length
fields.append (p[start:end])
p = p[end:]
i += 1
if i < len (separators):
continue
if not scheme.startswith ('hp') and fields[2] != '03f0':
# Skip non-HP printers if we know we're using HPLIP.
continue
this_dev = { 'bus': fields[0],
'dev': fields[1],
'name': fields[4],
'full': line }
this_mfr_id = fields[2]
this_mdl_id = fields[3]
infos = {}
paths = []
if not scheme.startswith ('hp'):
paths.extend (glob.glob ("/dev/usb/lp?"))
for mfr_id, mdls in dev_by_id.items ():
for mdl_id, devs in mdls.items ():
for dev in devs:
path = "/dev/bus/usb/%s/%s" % (dev['bus'], dev['dev'])
paths.append (path)
infos[path] = dev['full']
perms = []
for path in paths:
try:
self.op = TimedSubprocess (parent=parent,
args=[GETFACL, path],
close_fds=True,
env=new_environ,
stdin=subprocess.DEVNULL,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(getfacl_stdout, getfacl_stderr, result) = self.op.run ()
output = [x for x in getfacl_stdout if len (x) > 0]
except:
# Problem executing command.
output = []
info = infos.get (path, path)
perms.append ((info, output))
self.answers['getfacl_output'] = perms
# Don't actually display anything, just collect information.
return False
def collect_answer (self):
return self.answers
def cancel_operation (self):
self.op.cancel ()
Mini Shell