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