| /* |
| * Copyright (C) 2017 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 "directory.h" |
| |
| #include <android-base/stringprintf.h> |
| |
| procfsinspector::Directory::Directory(const char* path) { |
| if (path && path[0]) { |
| mPath.assign(path); |
| mDirectory.reset(opendir(path)); |
| } |
| } |
| |
| bool procfsinspector::Directory::Entry::isEmpty() const { |
| return mParent.empty() && mChild.empty(); |
| } |
| |
| procfsinspector::Directory::Entry::Entry(std::string parent, std::string child) : |
| mParent(parent), mChild(child) { |
| if (!isEmpty()) { |
| if (mParent.back() != '/') { |
| mParent += '/'; |
| } |
| } |
| } |
| |
| std::string procfsinspector::Directory::Entry::str() { |
| return mParent + mChild; |
| } |
| |
| uid_t procfsinspector::Directory::Entry::getOwnerUserId() { |
| if (isEmpty()) { |
| return -1; |
| } |
| struct stat buf; |
| // fill in stat info for this entry, or return invalid UID on failure |
| if (stat(str().c_str(), &buf)) { |
| return -1; |
| } |
| return buf.st_uid; |
| } |
| |
| procfsinspector::Directory::Entry procfsinspector::Directory::next(unsigned char type) { |
| if (auto dir = mDirectory.get()) { |
| dirent *entry = readdir(dir); |
| if (entry) { |
| // only return entries of the right type (regular file, directory, ...) |
| // but always return UNKNOWN entries as it is an allowed wildcard entry |
| if (entry->d_type == DT_UNKNOWN || |
| type == DT_UNKNOWN || |
| entry->d_type == type) { |
| return Entry(mPath, entry->d_name); |
| } |
| } |
| } |
| |
| return Entry(); |
| } |