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73 lines
2.1 KiB
73 lines
2.1 KiB
4 months ago
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "directory.h"
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#include <android-base/stringprintf.h>
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procfsinspector::Directory::Directory(const char* path) {
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if (path && path[0]) {
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mPath.assign(path);
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mDirectory.reset(opendir(path));
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}
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}
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bool procfsinspector::Directory::Entry::isEmpty() const {
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return mParent.empty() && mChild.empty();
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}
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procfsinspector::Directory::Entry::Entry(std::string parent, std::string child) :
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mParent(parent), mChild(child) {
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if (!isEmpty()) {
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if (mParent.back() != '/') {
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mParent += '/';
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}
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}
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}
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std::string procfsinspector::Directory::Entry::str() {
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return mParent + mChild;
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}
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uid_t procfsinspector::Directory::Entry::getOwnerUserId() {
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if (isEmpty()) {
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return -1;
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}
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struct stat buf;
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// fill in stat info for this entry, or return invalid UID on failure
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if (stat(str().c_str(), &buf)) {
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return -1;
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}
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return buf.st_uid;
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}
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procfsinspector::Directory::Entry procfsinspector::Directory::next(unsigned char type) {
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if (auto dir = mDirectory.get()) {
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dirent *entry = readdir(dir);
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if (entry) {
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// only return entries of the right type (regular file, directory, ...)
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// but always return UNKNOWN entries as it is an allowed wildcard entry
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if (entry->d_type == DT_UNKNOWN ||
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type == DT_UNKNOWN ||
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entry->d_type == type) {
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return Entry(mPath, entry->d_name);
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}
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}
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}
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return Entry();
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}
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