/usr/share/system-config-printer/ppdsloader.py is in system-config-printer-common 1.5.11-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 | #!/usr/bin/python3
## system-config-printer
## Copyright (C) 2010, 2011, 2012, 2013, 2014 Red Hat, Inc.
## Author: 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 dbus
from gi.repository import GObject
from gi.repository import Gtk
import cupshelpers
import cups
cups.require ("1.9.52")
import asyncconn
from debug import debugprint
import config
import gettext
gettext.install(domain=config.PACKAGE, localedir=config.localedir)
class PPDsLoader(GObject.GObject):
"""
1. If PackageKit support is available, and this is a local server,
try to use PackageKit to install relevant drivers. We do this
because we can only make the right choice about the "best" driver
when the full complement of drivers is there to choose from.
2. Fetch the list of available drivers from CUPS.
3. If Jockey is available, and there is no appropriate driver
available, try to use Jockey to install one.
4. If Jockey was able to install one, fetch the list of available
drivers again.
"""
__gsignals__ = {
'finished': (GObject.SignalFlags.RUN_LAST, None, ())
}
def __init__ (self, device_id=None, parent=None, device_uri=None,
host=None, encryption=None, language=None,
device_make_and_model=None):
GObject.GObject.__init__ (self)
debugprint ("+%s" % self)
self._device_id = device_id
self._device_uri = device_uri
self._device_make_and_model = device_make_and_model
self._parent = parent
self._host = host
self._encryption = encryption
self._language = language
self._installed_files = []
self._conn = None
self._ppds = None
self._exc = None
self._ppdsmatch_result = None
self._jockey_queried = False
self._jockey_has_answered = False
self._local_cups = (self._host is None or
self._host == "localhost" or
self._host[0] == '/')
try:
self._bus = dbus.SessionBus ()
except:
debugprint ("Failed to get session bus")
self._bus = None
fmt = _("Searching")
self._dialog = Gtk.MessageDialog (parent=parent,
modal=True, destroy_with_parent=True,
message_type=Gtk.MessageType.INFO,
buttons=Gtk.ButtonsType.CANCEL,
text=fmt)
self._dialog.format_secondary_text (_("Searching for drivers"))
self._dialog.connect ("response", self._dialog_response)
def run (self):
self._dialog.show_all ()
if self._device_id:
self._devid_dict = cupshelpers.parseDeviceID (self._device_id)
if (self._local_cups and
self._device_id and
self._devid_dict["MFG"] and
self._devid_dict["MDL"] and
self._bus):
self._gpk_device_id = "MFG:%s;MDL:%s;" % (self._devid_dict["MFG"],
self._devid_dict["MDL"])
self._query_packagekit ()
else:
self._query_cups ()
def __del__ (self):
debugprint ("-%s" % self)
def destroy (self):
debugprint ("DESTROY: %s" % self)
if self._dialog:
self._dialog.destroy ()
self._dialog = None
self._parent = None
if self._conn:
self._conn.destroy ()
self._conn = None
def get_installed_files (self):
return self._installed_files
def get_ppds (self):
return self._ppds
def get_ppdsmatch_result (self):
return self._ppdsmatch_result
def get_error (self):
debugprint ("%s: stored error is %s" % (self, repr (self._exc)))
return self._exc
def _dialog_response (self, dialog, response):
dialog.destroy ()
self._dialog = None
self.emit ('finished')
def _query_cups (self):
debugprint ("Asking CUPS for PPDs")
if (not self._conn):
c = asyncconn.Connection (host=self._host,
encryption=self._encryption,
reply_handler=self._cups_connect_reply,
error_handler=self._cups_error)
self._conn = c
else:
self._cups_connect_reply(self._conn, None)
def _cups_connect_reply (self, conn, UNUSED):
conn._begin_operation (_("fetching PPDs"))
conn.getPPDs2 (reply_handler=self._cups_reply,
error_handler=self._cups_error)
def _cups_reply (self, conn, result):
ppds = cupshelpers.ppds.PPDs (result, language=self._language)
self._ppds = ppds
self._need_requery_cups = False
if self._device_id:
fit = ppds.\
getPPDNamesFromDeviceID (self._devid_dict["MFG"],
self._devid_dict["MDL"],
self._devid_dict["DES"],
self._devid_dict["CMD"],
self._device_uri,
self._device_make_and_model)
ppdnamelist = ppds.\
orderPPDNamesByPreference (list(fit.keys ()),
self._installed_files,
devid=self._devid_dict,
fit=fit)
self._ppdsmatch_result = (fit, ppdnamelist)
ppdname = ppdnamelist[0]
if (self._bus and
not fit[ppdname].startswith ("exact") and
not self._jockey_queried and
self._devid_dict["MFG"] and
self._devid_dict["MDL"] and
self._local_cups):
# Try to install packages using jockey if
# - there's no appropriate driver (PPD) locally available
# - we are configuring local CUPS server
self._jockey_queried = True
self._query_jockey ()
return
conn.destroy ()
self._conn = None
if self._dialog is not None:
self._dialog.destroy ()
self._dialog = None
self.emit ('finished')
def _cups_error (self, conn, exc):
conn.destroy ()
self._conn = None
self._ppds = None
self._exc = exc
if self._dialog is not None:
self._dialog.destroy ()
self._dialog = None
self.emit ('finished')
def _query_packagekit (self):
debugprint ("Asking PackageKit to install drivers")
try:
obj = self._bus.get_object ("org.freedesktop.PackageKit",
"/org/freedesktop/PackageKit")
proxy = dbus.Interface (obj, "org.freedesktop.PackageKit.Modify")
resources = [self._gpk_device_id]
interaction = "hide-finished"
debugprint ("Calling InstallPrinterDrivers (%s, %s, %s)" %
(repr (0), repr (resources), repr (interaction)))
proxy.InstallPrinterDrivers (dbus.UInt32 (0),
resources, interaction,
reply_handler=self._packagekit_reply,
error_handler=self._packagekit_error,
timeout=3600)
except Exception as e:
debugprint ("Failed to talk to PackageKit: %s" % repr (e))
if self._dialog:
self._dialog.show_all ()
self._query_cups ()
def _packagekit_reply (self):
debugprint ("Got PackageKit reply")
self._need_requery_cups = True
if self._dialog:
self._dialog.show_all ()
self._query_cups ()
def _packagekit_error (self, exc):
debugprint ("Got PackageKit error: %s" % repr (exc))
if self._dialog:
self._dialog.show_all ()
self._query_cups ()
def _query_jockey (self):
debugprint ("Asking Jockey to install drivers")
try:
obj = self._bus.get_object ("com.ubuntu.DeviceDriver", "/GUI")
jockey = dbus.Interface (obj, "com.ubuntu.DeviceDriver")
r = jockey.search_driver ("printer_deviceid:%s" % self._device_id,
reply_handler=self._jockey_reply,
error_handler=self._jockey_error,
timeout=3600)
except Exception as e:
self._jockey_error (e)
def _jockey_reply (self, conn, result):
debugprint ("Got Jockey result: %s" % repr (result))
self._jockey_has_answered = True
try:
self._installed_files = result[1]
except:
self._installed_files = []
self._query_cups ()
def _jockey_error (self, exc):
debugprint ("Got Jockey error: %s" % repr (exc))
if self._need_requery_cups:
self._query_cups ()
else:
if self._conn is not None:
self._conn.destroy ()
self._conn = None
if self._dialog is not None:
self._dialog.destroy ()
self._dialog = None
self.emit ('finished')
if __name__ == "__main__":
class Foo:
def __init__ (self):
w = Gtk.Window ()
b = Gtk.Button.new_with_label ("Go")
w.add (b)
b.connect ('clicked', self.go)
w.connect ('delete-event', Gtk.main_quit)
w.show_all ()
self._window = w
def go (self, button):
loader = PPDsLoader (device_id="MFG:MFG;MDL:MDL;",
parent=self._window)
loader.connect ('finished', self.ppds_loaded)
loader.run ()
def ppds_loaded (self, ppdsloader):
self._window.destroy ()
Gtk.main_quit ()
exc = ppdsloader.get_error ()
print(exc)
ppds = ppdsloader.get_ppds ()
if ppds is not None:
print(len (ppds))
ppdsloader.destroy ()
from debug import set_debugging
set_debugging (True)
Foo ()
Gtk.main ()
|