You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
3.1 KiB
111 lines
3.1 KiB
/*
|
|
* Copyright (C) 2018 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.
|
|
*/
|
|
|
|
#include <procpartition/procpartition.h>
|
|
|
|
#include <android-base/file.h>
|
|
|
|
namespace android {
|
|
namespace procpartition {
|
|
|
|
std::ostream& operator<<(std::ostream& os, Partition p) {
|
|
switch (p) {
|
|
case Partition::SYSTEM: return os << "system";
|
|
case Partition::VENDOR: return os << "vendor";
|
|
case Partition::ODM: return os << "odm";
|
|
case Partition::UNKNOWN: // fallthrough
|
|
default:
|
|
return os << "(unknown)";
|
|
}
|
|
}
|
|
|
|
std::string getExe(pid_t pid) {
|
|
std::string exe;
|
|
std::string real;
|
|
if (!android::base::Readlink("/proc/" + std::to_string(pid) + "/exe", &exe)) {
|
|
return "";
|
|
}
|
|
if (!android::base::Realpath(exe, &real)) {
|
|
return "";
|
|
}
|
|
return real;
|
|
}
|
|
|
|
std::string getCmdline(pid_t pid) {
|
|
std::string content;
|
|
if (!android::base::ReadFileToString("/proc/" + std::to_string(pid) + "/cmdline", &content,
|
|
false /* follow symlinks */)) {
|
|
return "";
|
|
}
|
|
return std::string{content.c_str()};
|
|
}
|
|
|
|
Partition parsePartition(const std::string& s) {
|
|
if (s == "system") {
|
|
return Partition::SYSTEM;
|
|
}
|
|
if (s == "vendor") {
|
|
return Partition::VENDOR;
|
|
}
|
|
if (s == "odm") {
|
|
return Partition::ODM;
|
|
}
|
|
return Partition::UNKNOWN;
|
|
}
|
|
|
|
Partition getPartitionFromRealpath(const std::string& path) {
|
|
if (path == "/system/bin/app_process64" ||
|
|
path == "/system/bin/app_process32") {
|
|
|
|
return Partition::UNKNOWN; // cannot determine
|
|
}
|
|
size_t backslash = path.find_first_of('/', 1);
|
|
std::string partition = (backslash != std::string::npos) ? path.substr(1, backslash - 1) : path;
|
|
|
|
return parsePartition(partition);
|
|
}
|
|
|
|
Partition getPartitionFromCmdline(pid_t pid) {
|
|
const auto& cmdline = getCmdline(pid);
|
|
if (cmdline == "system_server") {
|
|
return Partition::SYSTEM;
|
|
}
|
|
if (cmdline.empty() || cmdline.front() != '/') {
|
|
return Partition::UNKNOWN;
|
|
}
|
|
return getPartitionFromRealpath(cmdline);
|
|
}
|
|
|
|
Partition getPartitionFromExe(pid_t pid) {
|
|
const auto& real = getExe(pid);
|
|
if (real.empty() || real.front() != '/') {
|
|
return Partition::UNKNOWN;
|
|
}
|
|
return getPartitionFromRealpath(real);
|
|
}
|
|
|
|
|
|
Partition getPartition(pid_t pid) {
|
|
Partition partition = getPartitionFromExe(pid);
|
|
if (partition == Partition::UNKNOWN) {
|
|
partition = getPartitionFromCmdline(pid);
|
|
}
|
|
return partition;
|
|
}
|
|
|
|
} // namespace procpartition
|
|
} // namespace android
|