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/*
* 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, nullptr))) {
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
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