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#!/usr/bin/env python
#
# Copyright (C) 2022 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.
#
"""Package <-> UID <-> Process mapper."""
import re
# ex) Name: init
PROC_STATUS_NAME_LINE = r"Name:\s+(\S+)"
# ex) Pid: 1
PROC_STATUS_PID_LINE = r"Pid:\s+([0-9]+)"
# ex) Uid: 0 0 0 0
PROC_STATUS_UID_LINE = r"Uid:\s+([0-9]+)\s+([0-9]+)\s+([0-9]+)\s+([0-9]+)"
# ex) package:com.google.android.car.uxr.sample uid:1000
PACKAGE_UID_LINE = r"package:(\S+)\suid:([0-9]+)"
USER_ID_OFFSET = 100000
AID_APP_START = 10000
UNKNOWN_UID = -1
class UidInfo:
def __init__(self, uid, packageName=None):
self.uid = uid
self.packageName = packageName
def to_string(self):
appId = int(self.uid % USER_ID_OFFSET)
if self.uid == UNKNOWN_UID:
return "UID: UNKNOWN"
elif self.packageName is None and appId < AID_APP_START:
return "User ID: {}, Native service AID: {}".format(
int(self.uid / USER_ID_OFFSET), appId)
elif self.packageName is None:
return "User ID: {}, App ID: {}".format(
int(self.uid / USER_ID_OFFSET), appId)
else:
return "User ID: {}, Package name: {}".format(
int(self.uid / USER_ID_OFFSET), self.packageName)
class UidProcessMapper:
def __init__(self):
self.nameReMatcher = re.compile(PROC_STATUS_NAME_LINE)
self.pidReMatcher = re.compile(PROC_STATUS_PID_LINE)
self.uidReMatcher = re.compile(PROC_STATUS_UID_LINE)
self.packageUidMatcher = re.compile(PACKAGE_UID_LINE)
self.uidByProcessDict = {} # Key: Process Name, Value: {PID: UID}
self.packageNameByAppId = {} # Key: App ID, Value: Package name
def parse_proc_status_dump(self, dump):
name, pid, uid = "", "", ""
for line in dump.split("\n"):
if line.startswith("Name:"):
name = self.match_re(self.nameReMatcher, line)
pid, uid = "", ""
elif line.startswith("Pid:"):
pid = self.match_re(self.pidReMatcher, line)
uid = ""
elif line.startswith("Uid:"):
uid = self.match_re(self.uidReMatcher, line)
if name != "" and pid != "" and uid != "":
self.add_mapping(name, int(pid), int(uid))
name, pid, uid = "", "", ""
def parse_uid_package_dump(self, dump):
for line in dump.split("\n"):
if line == "":
continue
match = self.packageUidMatcher.match(line)
if (match):
packageName = match.group(1)
appId = int(match.group(2))
if appId in self.packageNameByAppId:
self.packageNameByAppId[appId].add(packageName)
else:
self.packageNameByAppId[appId] = {packageName}
else:
print("'{}' line doesn't match '{}' regex".format(
line, self.packageUidMatcher))
def match_re(self, reMatcher, line):
match = reMatcher.match(line)
if not match:
return ""
return match.group(1)
def add_mapping(self, name, pid, uid):
if name in self.uidByProcessDict:
self.uidByProcessDict[name][pid] = uid
else:
self.uidByProcessDict[name] = {pid: uid}
def get_uid(self, name, pid):
if name in self.uidByProcessDict:
if pid in self.uidByProcessDict[name]:
return self.uidByProcessDict[name][pid]
return UNKNOWN_UID
def get_uid_info(self, uid):
appId = uid % USER_ID_OFFSET
if appId in self.packageNameByAppId:
return UidInfo(uid, " | ".join(self.packageNameByAppId[appId]))
else:
return UidInfo(uid)
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