Svetoslav Ganov d26d4898fc Print spooler security and some new print service facing APIs.
1. Updated the security mode of the print spooler. Now the spooler
   is not signed with the system key, it is not a privileged app so if
   it gets compromised (PDF rendering is a potential attack vector)
   it cannot access dangerous permissions. Also only the system
   can bind to the spooler.

2. Added APIs for asking a print service to start and stop tracking
   a given printer. This is need for the case when the user selects
   the printer and the print service should do a best effort to keep
   the system updated for the current state of the printer.

3. Added APIs for putting a print job in a blocked state. A print
   service would report the print job as blocked if for some reason
   the printer cannot proceed, e.g. 99 pages are printed but there
   is no paper for the last one. The user has to add more paper
   and the print service can resume the job.

4. Changed the read/write APIs to use ParcelFileDescriptor instead
   of FileDescriptor since the latter does not have a clean API for
   detaching the wrapped Linux file descriptor when one wants to
   push it to native.

5. Added API for getting the size of the printed document so the
   print service can avoid handling big filed over cellular network
   or ask the user if needed.

6. Now the print services that are preinstalled on the system image
   are automatically enabled.

Change-Id: Ia06c311d3d21cabb9e1368f13928e11cd0030918
2013-08-29 15:39:44 -07:00

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Makefile

# Copyright (C) 2013 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES := $(call all-java-files-under, src)
LOCAL_PACKAGE_NAME := PrintSpooler
LOCAL_JAVA_LIBRARIES := framework-base
LOCAL_PROGUARD_ENABLED := disabled
include $(BUILD_PACKAGE)