File system-config-printer-policykit.patch of Package system-config-printer

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File system-config-printer-policykit.patch of Package system-config-printer (Revision 0ae44ab412973e227e5dda626beef012)

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diff --git a/Makefile.am b/Makefile.am
index cb62cbd..fee240e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -60,6 +60,7 @@ nobase_pkgdata_DATA=					\
 	authconn.py					\
 	config.py					\
 	contextmenu.py					\
+	cupspk.py					\
 	debug.py					\
 	errordialogs.py					\
 	jobviewer.py					\
diff --git a/authconn.py b/authconn.py
index 1b37e34..bfcb13f 100644
--- a/authconn.py
+++ b/authconn.py
@@ -18,6 +18,7 @@
 ## Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
 import cups
+import cupspk
 import gtk
 from debug import *
 
@@ -120,8 +121,15 @@ class Connection:
 
     def _connect (self):
         cups.setUser (self._use_user)
+
+        self._use_pk = self._server[0] == '/' or self._server == 'localhost'
+        if self._use_pk:
+            create_object = cupspk.Connection
+        else:
+            create_object = cups.Connection
+
         try:
-            self._connection = cups.Connection (host=self._server,
+            self._connection = create_object (host=self._server,
                                                 port=self._port,
                                                 encryption=self._encryption)
         except TypeError:
@@ -129,16 +137,20 @@ class Connection:
             cups.setServer (self._server)
             cups.setPort (self._port)
             cups.setEncryption (self._encryption)
-            self._connection = cups.Connection ()
+            self._connection = create_object ()
+
+        if self._use_pk:
+            self._connection.set_parent(self._parent)
 
         self._user = self._use_user
         debugprint ("Connected as user %s" % self._user)
-        methodtype = type (self._connection.getPrinters)
+        methodtype_lambda = type (self._connection.getPrinters)
+        methodtype_real = type (self._connection.addPrinter)
         for fname in dir (self._connection):
             if fname[0] == '_':
                 continue
             fn = getattr (self._connection, fname)
-            if type (fn) != methodtype:
+            if not type (fn) in [methodtype_lambda, methodtype_real]:
                 continue
             setattr (self, fname, self._make_binding (fname, fn))
 
@@ -164,6 +176,8 @@ class Connection:
                         raise cups.IPPError (cups.IPP_NOT_AUTHORIZED, '')
                 break
             except cups.IPPError, (e, m):
+                if self._use_pk and m == 'pkcancel':
+                    raise
                 if not self._cancel and (e == cups.IPP_NOT_AUTHORIZED or
                                          e == cups.IPP_FORBIDDEN):
                     self._failed ()
diff --git a/cupspk.py b/cupspk.py
new file mode 100644
index 0000000..b04d1b8
--- /dev/null
+++ b/cupspk.py
@@ -0,0 +1,625 @@
+# vim: set ts=4 sw=4 et: coding=UTF-8
+#
+# Copyright (C) 2008 Novell, Inc.
+#
+# Authors: Vincent Untz
+#
+# 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.
+#
+
+# check FIXME/TODO here
+# check FIXME/TODO in cups-pk-helper
+# define fine-grained policy (more than one level of permission)
+# add missing methods
+
+import os
+import sys
+
+import tempfile
+
+import cups
+import dbus
+import gtk
+
+from dbus.mainloop.glib import DBusGMainLoop
+DBusGMainLoop(set_as_default=True)
+
+PK_AUTH_NAME  = 'org.freedesktop.PolicyKit.AuthenticationAgent'
+PK_AUTH_PATH  = '/'
+PK_AUTH_IFACE = 'org.freedesktop.PolicyKit.AuthenticationAgent'
+
+CUPS_PK_NAME  = 'org.opensuse.CupsPkHelper.Mechanism'
+CUPS_PK_PATH  = '/'
+CUPS_PK_IFACE = 'org.opensuse.CupsPkHelper.Mechanism'
+
+CUPS_PK_NEED_AUTH = 'org.opensuse.CupsPkHelper.Mechanism.NotPrivileged'
+
+
+pk_auth_ret = False
+pk_auth_error = None
+pk_auth_running = False
+pk_auth_done = False
+
+def _pk_auth_reply_handler(ret):
+    global pk_auth_ret
+    global pk_auth_done
+
+    pk_auth_ret = ret
+    pk_auth_done = True
+
+def _pk_auth_error_handler(e):
+    global pk_auth_error
+    global pk_auth_done
+
+    pk_auth_error = str(e)
+    pk_auth_done = True
+
+
+# we can't subclass cups.Connection, even when adding
+# Py_TPFLAGS_BASETYPE to cupsconnection.c
+# So we'll hack this...
+class Connection:
+    def __init__(self, host, port, encryption):
+        self._parent = None
+        self._session_bus = dbus.SessionBus()
+        self._system_bus = dbus.SystemBus()
+
+        self._connection = cups.Connection(host=host,
+                                           port=port,
+                                           encryption=encryption)
+
+        self._hack_subclass()
+
+
+    def _hack_subclass(self):
+        # here's how to subclass without really subclassing. Just provide
+        # the same methods
+        methodtype = type(self._connection.getPrinters)
+        for fname in dir(self._connection):
+            if fname[0] == '_':
+                continue
+            fn = getattr(self._connection, fname)
+            if type(fn) != methodtype:
+                continue
+            if not hasattr(self, fname):
+                setattr(self, fname, fn.__call__)
+
+
+    def set_parent(self, parent):
+        self._parent = parent
+
+
+    def _get_cups_pk(self):
+        try:
+            object = self._system_bus.get_object(CUPS_PK_NAME, CUPS_PK_PATH)
+            return dbus.Interface(object, CUPS_PK_IFACE)
+        except dbus.exceptions.DBusException:
+            return None
+
+
+    def _obtain_auth(self, action, xid = 0):
+        global pk_auth_ret
+        global pk_auth_error
+        global pk_auth_done
+        global pk_auth_running
+
+        if pk_auth_running:
+            # FIXME: raise an exception: this should really never happen
+            return False
+
+        pk_auth_ret = False
+        pk_auth_error = None
+        pk_auth_done = False
+
+        pk_auth_object = self._session_bus.get_object(PK_AUTH_NAME, PK_AUTH_PATH)
+        pk_auth = dbus.Interface(pk_auth_object, PK_AUTH_IFACE)
+
+        # We're doing this dbus call asynchronously because we want to not
+        # freeze the UI while a menu is being destroyed. And the windows might
+        # need some repainting while the authorization dialog is displayed.
+        pk_auth_running = True
+
+        pk_auth.ObtainAuthorization(action, dbus.UInt32(xid), dbus.UInt32(os.getpid()), reply_handler=_pk_auth_reply_handler, error_handler=_pk_auth_error_handler)
+
+        while not pk_auth_done:
+            gtk.main_iteration(True)
+
+        pk_auth_running = False
+
+        if pk_auth_error != None:
+            raise dbus.exceptions.DBusException(pk_auth_error)
+
+        if not type(pk_auth_ret) == dbus.Boolean:
+            return False
+
+        return pk_auth_ret != 0
+
+
+    def _handle_exception_with_auth(self, e):
+        if e.get_dbus_name() != CUPS_PK_NEED_AUTH:
+            return False
+
+        tokens = e.get_dbus_message().split(' ', 2)
+        if len(tokens) != 3:
+            return False
+
+        try:
+            xid = 0
+            if self._parent and getattr(self._parent, 'window') and getattr(self._parent.window, 'xid'):
+                xid = self._parent.window.xid
+
+            # FIXME: is xid working?
+            ret = self._obtain_auth(tokens[0], xid)
+        except dbus.exceptions.DBusException:
+            return False
+
+        if not ret:
+            raise cups.IPPError(cups.IPP_NOT_AUTHORIZED, 'pkcancel')
+
+        return True
+
+
+    def _call_with_pk_and_fallback(self, use_fallback, pk_function_name, pk_args, fallback_function, *args, **kwds):
+        pk_function = None
+
+        if not use_fallback:
+            cups_pk = self._get_cups_pk()
+            if cups_pk:
+                try:
+                    pk_function = cups_pk.get_dbus_method(pk_function_name)
+                except dbus.exceptions.DBusException:
+                    pass
+
+        if use_fallback or not pk_function:
+            return fallback_function(*args, **kwds)
+
+        pk_retval = 'PolicyKit communication issue'
+
+        while True:
+            try:
+                # FIXME: async call or not?
+                pk_retval = pk_function(*pk_args)
+
+                # if the PK call has more than one return values, we pop the
+                # first one as the error message
+                if type(pk_retval) == tuple:
+                    retval = pk_retval[1:]
+                    # if there's no error, then we can safely return what we
+                    # got
+                    if pk_retval[0] == '':
+                        # if there's only one item left in the tuple, we don't
+                        # want to return the tuple, but the item
+                        if len(retval) == 1:
+                            return retval[0]
+                        else:
+                            return retval
+                break
+            except dbus.exceptions.DBusException, e:
+                if not self._handle_exception_with_auth(e):
+                    break
+
+        # The PolicyKit call did not work (either a PK-error and we got a dbus
+        # exception that wasn't handled, or an error in the mechanism itself)
+        if pk_retval != '':
+            print >>sys.stderr, 'PolicyKit call to %s did not work: %s' % (pk_function_name, pk_retval)
+            return fallback_function(*args, **kwds)
+
+
+    def _args_to_tuple(self, types, *args):
+        retval = [ False ]
+
+        if len(types) != len(args):
+            retval[0] = True
+            # We do this to have the right length for the returned value
+            retval.extend(types)
+            return tuple(types)
+
+        exception = False
+
+        for i in range(len(types)):
+            if type(args[i]) != types[i]:
+                if types[i] == str and type(args[i]) == unicode:
+                    # we accept a mix between unicode and str
+                    pass
+                elif types[i] == str and type(args[i]) == int:
+                    # we accept a mix between int and str
+                    retval.append(str(args[i]))
+                    continue
+                elif types[i] == str and type(args[i]) == bool:
+                    # we accept a mix between bool and str
+                    retval.append(str(args[i]))
+                    continue
+                elif types[i] == str and args[i] == None:
+                    # None is an empty string for dbus
+                    retval.append('')
+                    continue
+                elif types[i] == list and type(args[i]) == tuple:
+                    # we accept a mix between list and tuple
+                    retval.append(list(args[i]))
+                    continue
+                elif types[i] == list and args[i] == None:
+                    # None is an empty list
+                    retval.append([])
+                    continue
+                else:
+                    exception = True
+            retval.append(args[i])
+
+        retval[0] = exception
+
+        return tuple(retval)
+
+
+    def _kwds_to_vars(self, names, **kwds):
+        ret = []
+
+        for name in names:
+            if kwds.has_key(name):
+                ret.append(kwds[name])
+            else:
+                ret.append('')
+
+        return tuple(ret)
+
+
+#    getPrinters
+#    getDests
+#    getClasses
+#    getPPDs
+#    getServerPPD
+#    getDocument
+#    getDevices
+#    getJobs
+#    getJobAttributes
+#    cancelJob
+#    cancelAllJobs
+#    authenticateJob
+#    setJobHoldUntil
+#    restartJob
+
+    def getFile(self, *args, **kwds):
+        ''' Keeping this as an alternative for the code.
+            We don't use it because it's not possible to know if the call was a
+            PK-one (and so we push the content of a temporary filename to fd or
+            file) or a non-PK-one (in which case nothing should be done).
+
+                filename = None
+                fd = None
+                file = None
+                if use_pycups:
+                    if len(kwds) != 1:
+                        use_pycups = True
+                    elif kwds.has_key('filename'):
+                        filename = kwds['filename']
+                    elif kwds.has_key('fd'):
+                        fd = kwds['fd']
+                    elif kwds.has_key('file'):
+                        file = kwds['file']
+                    else:
+                        use_pycups = True
+
+                    if fd or file:
+        '''
+
+        if len(args) == 2:
+            (use_pycups, resource, filename) = self._args_to_tuple([str, str], *args)
+        else:
+            (use_pycups, resource) = self._args_to_tuple([str], *args)
+            if kwds.has_key('filename'):
+                filename = kwds['filename']
+            else:
+                if not use_pycups:
+                    raise TypeError()
+                else:
+                    filename = None
+
+        pk_args = (resource, filename)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'FileGet', pk_args,
+                                        self._connection.getFile,
+                                        *args, **kwds)
+
+
+    def putFile(self, *args, **kwds):
+        if len(args) == 2:
+            (use_pycups, resource, filename) = self._args_to_tuple([str, str], *args)
+        else:
+            (use_pycups, resource) = self._args_to_tuple([str], *args)
+            if kwds.has_key('filename'):
+                filename = kwds['filename']
+            else:
+                if not use_pycups:
+                    raise TypeError()
+                else:
+                    filename = None
+
+        pk_args = (resource, filename)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'FilePut', pk_args,
+                                        self._connection.putFile,
+                                        *args, **kwds)
+
+
+    def addPrinter(self, *args, **kwds):
+        (use_pycups, name) = self._args_to_tuple([str], *args)
+        (filename, ppdname, info, location, device, ppd) = self._kwds_to_vars(['filename', 'ppdname', 'info', 'location', 'device', 'ppd'], **kwds)
+
+        need_unlink = False
+        if not ppdname and not filename and ppd:
+            (fd, filename) = tempfile.mkstemp ()
+            ppd.writeFd(fd)
+            os.close(fd)
+            need_unlink = True
+
+        if filename and not ppdname:
+            pk_args = (name, device, filename, info, location)
+            self._call_with_pk_and_fallback(use_pycups,
+                                            'PrinterAddWithPpdFile', pk_args,
+                                            self._connection.addPrinter,
+                                            *args, **kwds)
+            if need_unlink:
+                os.unlink(filename)
+        else:
+            pk_args = (name, device, ppdname, info, location)
+            self._call_with_pk_and_fallback(use_pycups,
+                                            'PrinterAdd', pk_args,
+                                            self._connection.addPrinter,
+                                            *args, **kwds)
+
+
+    def setPrinterDevice(self, *args, **kwds):
+        (use_pycups, name, device) = self._args_to_tuple([str, str], *args)
+        pk_args = (name, device)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetDevice', pk_args,
+                                        self._connection.setPrinterDevice,
+                                        *args, **kwds)
+
+
+    def setPrinterInfo(self, *args, **kwds):
+        (use_pycups, name, info) = self._args_to_tuple([str, str], *args)
+        pk_args = (name, info)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetInfo', pk_args,
+                                        self._connection.setPrinterInfo,
+                                        *args, **kwds)
+
+
+    def setPrinterLocation(self, *args, **kwds):
+        (use_pycups, name, location) = self._args_to_tuple([str, str], *args)
+        pk_args = (name, location)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetLocation', pk_args,
+                                        self._connection.setPrinterLocation,
+                                        *args, **kwds)
+
+
+    def setPrinterShared(self, *args, **kwds):
+        (use_pycups, name, shared) = self._args_to_tuple([str, bool], *args)
+        pk_args = (name, shared)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetShared', pk_args,
+                                        self._connection.setPrinterShared,
+                                        *args, **kwds)
+
+
+    def setPrinterJobSheets(self, *args, **kwds):
+        (use_pycups, name, start, end) = self._args_to_tuple([str, str, str], *args)
+        pk_args = (name, start, end)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetJobSheets', pk_args,
+                                        self._connection.setPrinterJobSheets,
+                                        *args, **kwds)
+
+
+    def setPrinterErrorPolicy(self, *args, **kwds):
+        (use_pycups, name, policy) = self._args_to_tuple([str, str], *args)
+        pk_args = (name, policy)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetErrorPolicy', pk_args,
+                                        self._connection.setPrinterErrorPolicy,
+                                        *args, **kwds)
+
+
+    def setPrinterOpPolicy(self, *args, **kwds):
+        (use_pycups, name, policy) = self._args_to_tuple([str, str], *args)
+        pk_args = (name, policy)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetOpPolicy', pk_args,
+                                        self._connection.setPrinterOpPolicy,
+                                        *args, **kwds)
+
+
+    def setPrinterUsersAllowed(self, *args, **kwds):
+        (use_pycups, name, users) = self._args_to_tuple([str, list], *args)
+        pk_args = (name, users)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetUsersAllowed', pk_args,
+                                        self._connection.setPrinterUsersAllowed,
+                                        *args, **kwds)
+
+
+    def setPrinterUsersDenied(self, *args, **kwds):
+        (use_pycups, name, users) = self._args_to_tuple([str, list], *args)
+        pk_args = (name, users)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetUsersDenied', pk_args,
+                                        self._connection.setPrinterUsersDenied,
+                                        *args, **kwds)
+
+    def addPrinterOptionDefault(self, *args, **kwds):
+        # The values can be either a single string, or a list of strings, so
+        # we have to handle this
+        (use_pycups, name, option, value) = self._args_to_tuple([str, str, str], *args)
+        # success
+        if not use_pycups:
+            values = (value,)
+        # okay, maybe we directly have values
+        else:
+            (use_pycups, name, option, values) = self._args_to_tuple([str, str, list], *args)
+        pk_args = (name, option, values)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterAddOptionDefault', pk_args,
+                                        self._connection.addPrinterOptionDefault,
+                                        *args, **kwds)
+
+
+    def deletePrinterOptionDefault(self, *args, **kwds):
+        (use_pycups, name, option) = self._args_to_tuple([str, str], *args)
+        pk_args = (name, option)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterDeleteOptionDefault', pk_args,
+                                        self._connection.deletePrinterOptionDefault,
+                                        *args, **kwds)
+
+
+    def deletePrinter(self, *args, **kwds):
+        (use_pycups, name) = self._args_to_tuple([str], *args)
+        pk_args = (name,)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterDelete', pk_args,
+                                        self._connection.deletePrinter,
+                                        *args, **kwds)
+
+#    getPrinterAttributes
+
+    def addPrinterToClass(self, *args, **kwds):
+        (use_pycups, printer, name) = self._args_to_tuple([str, str], *args)
+        pk_args = (name, printer)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'ClassAddPrinter', pk_args,
+                                        self._connection.addPrinterToClass,
+                                        *args, **kwds)
+
+
+    def deletePrinterFromClass(self, *args, **kwds):
+        (use_pycups, printer, name) = self._args_to_tuple([str, str], *args)
+        pk_args = (name, printer)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'ClassDeletePrinter', pk_args,
+                                        self._connection.deletePrinterFromClass,
+                                        *args, **kwds)
+
+
+    def deleteClass(self, *args, **kwds):
+        (use_pycups, name) = self._args_to_tuple([str], *args)
+        pk_args = (name,)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'ClassDelete', pk_args,
+                                        self._connection.deleteClass,
+                                        *args, **kwds)
+
+#    getDefault
+
+    def setDefault(self, *args, **kwds):
+        (use_pycups, name) = self._args_to_tuple([str], *args)
+        pk_args = (name,)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetDefault', pk_args,
+                                        self._connection.setDefault,
+                                        *args, **kwds)
+
+#    getPPD
+
+    def enablePrinter(self, *args, **kwds):
+        (use_pycups, name) = self._args_to_tuple([str], *args)
+        pk_args = (name, True)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetEnabled', pk_args,
+                                        self._connection.enablePrinter,
+                                        *args, **kwds)
+
+
+    def disablePrinter(self, *args, **kwds):
+        (use_pycups, name) = self._args_to_tuple([str], *args)
+        pk_args = (name, False)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetEnabled', pk_args,
+                                        self._connection.enablePrinter,
+                                        *args, **kwds)
+
+
+    def acceptJobs(self, *args, **kwds):
+        (use_pycups, name) = self._args_to_tuple([str], *args)
+        pk_args = (name, True, '')
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetAcceptJobs', pk_args,
+                                        self._connection.acceptJobs,
+                                        *args, **kwds)
+
+
+    def rejectJobs(self, *args, **kwds):
+        (use_pycups, name) = self._args_to_tuple([str], *args)
+        (reason,) = self._kwds_to_vars(['reason'], **kwds)
+        pk_args = (name, False, reason)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'PrinterSetAcceptJobs', pk_args,
+                                        self._connection.rejectJobs,
+                                        *args, **kwds)
+
+
+#    printTestPage
+#    adminGetServerSettings
+
+
+    def adminGetServerSettings(self, *args, **kwds):
+        use_pycups = False
+        pk_args = ()
+
+        return self._call_with_pk_and_fallback(use_pycups,
+                                               'ServerGetSettings', pk_args,
+                                               self._connection.adminGetServerSettings,
+                                               *args, **kwds)
+
+
+    def adminSetServerSettings(self, *args, **kwds):
+        (use_pycups, settings) = self._args_to_tuple([dict], *args)
+        pk_args = (settings,)
+
+        self._call_with_pk_and_fallback(use_pycups,
+                                        'ServerSetSettings', pk_args,
+                                        self._connection.adminSetServerSettings,
+                                        *args, **kwds)
+
+
+#    getSubscriptions
+#    createSubscription
+#    getNotifications
+#    cancelSubscription
+#    renewSubscription
+#    printFile
+#    printFiles
diff --git a/system-config-printer.py b/system-config-printer.py
index 2520e73..b908f7b 100755
--- a/system-config-printer.py
+++ b/system-config-printer.py
@@ -1538,7 +1538,7 @@ class GUI(GtkGUI, monitor.Watcher):
             return True
         self.changed = set() # of options
 
-        if not self.__dict__.has_key ("server_settings"):
+        if not self.cups._use_pk and not self.__dict__.has_key ("server_settings"):
             # We can authenticate with the server correctly at this point,
             # but we have never fetched the server settings to see whether
             # the server is publishing shared printers.  Fetch the settings

Places

File system-config-printer-policykit.patch of Package system-config-printer (Revision 0ae44ab412973e227e5dda626beef012)

Places