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137 lines
3.9 KiB
137 lines
3.9 KiB
/*
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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 "CacheItem.h"
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#include <inttypes.h>
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#include <stdint.h>
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#include <sys/xattr.h>
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include "utils.h"
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using android::base::StringPrintf;
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namespace android {
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namespace installd {
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CacheItem::CacheItem(FTSENT* p) {
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level = p->fts_level;
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directory = S_ISDIR(p->fts_statp->st_mode);
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size = p->fts_statp->st_blocks * 512;
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modified = p->fts_statp->st_mtime;
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mParent = static_cast<CacheItem*>(p->fts_parent->fts_pointer);
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if (mParent) {
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group = mParent->group;
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tombstone = mParent->tombstone;
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mName = p->fts_name;
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mName.insert(0, "/");
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} else {
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group = false;
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tombstone = false;
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mName = p->fts_path;
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}
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}
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CacheItem::~CacheItem() {
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}
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std::string CacheItem::toString() {
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return StringPrintf("%s size=%" PRId64 " mod=%ld", buildPath().c_str(), size, modified);
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}
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std::string CacheItem::buildPath() {
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std::string res = mName;
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CacheItem* parent = mParent;
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while (parent) {
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res.insert(0, parent->mName);
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parent = parent->mParent;
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}
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return res;
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}
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int CacheItem::purge() {
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int res = 0;
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auto path = buildPath();
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if (directory) {
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FTS *fts;
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FTSENT *p;
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char *argv[] = { (char*) path.c_str(), nullptr };
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if (!(fts = fts_open(argv, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr))) {
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PLOG(WARNING) << "Failed to fts_open " << path;
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return -1;
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}
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while ((p = fts_read(fts)) != nullptr) {
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switch (p->fts_info) {
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case FTS_D:
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if (p->fts_level == 0) {
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p->fts_number = tombstone;
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} else {
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p->fts_number = p->fts_parent->fts_number
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| (getxattr(p->fts_path, kXattrCacheTombstone, nullptr, 0) >= 0);
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}
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break;
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case FTS_F:
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if (p->fts_parent->fts_number) {
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if (truncate(p->fts_path, 0) != 0) {
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PLOG(WARNING) << "Failed to truncate " << p->fts_path;
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res = -1;
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}
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} else {
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if (unlink(p->fts_path) != 0) {
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PLOG(WARNING) << "Failed to unlink " << p->fts_path;
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res = -1;
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}
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}
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break;
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case FTS_DEFAULT:
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case FTS_SL:
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case FTS_SLNONE:
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if (unlink(p->fts_path) != 0) {
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PLOG(WARNING) << "Failed to unlink " << p->fts_path;
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res = -1;
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}
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break;
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case FTS_DP:
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if (rmdir(p->fts_path) != 0) {
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PLOG(WARNING) << "Failed to rmdir " << p->fts_path;
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res = -1;
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}
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break;
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}
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}
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} else {
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if (tombstone) {
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if (truncate(path.c_str(), 0) != 0) {
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PLOG(WARNING) << "Failed to truncate " << path;
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res = -1;
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}
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} else {
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if (unlink(path.c_str()) != 0) {
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PLOG(WARNING) << "Failed to unlink " << path;
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res = -1;
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}
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}
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}
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return res;
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}
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} // namespace installd
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} // namespace android
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