blob: 393e65a067e0686c45d9b1326c4b3226d8dd6052 [file] [log] [blame]
//
// Copyright (C) 2016 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 "update_engine/utils_android.h"
#include <fs_mgr.h>
using std::string;
namespace chromeos_update_engine {
namespace {
// Open the appropriate fstab file and fallback to /fstab.device if
// that's what's being used.
static struct fstab* OpenFSTab() {
struct fstab* fstab = fs_mgr_read_fstab_default();
if (fstab != nullptr)
return fstab;
fstab = fs_mgr_read_fstab("/fstab.device");
return fstab;
}
} // namespace
namespace utils {
bool DeviceForMountPoint(const string& mount_point, base::FilePath* device) {
struct fstab* fstab;
struct fstab_rec* record;
fstab = OpenFSTab();
if (fstab == nullptr) {
LOG(ERROR) << "Error opening fstab file.";
return false;
}
record = fs_mgr_get_entry_for_mount_point(fstab, mount_point.c_str());
if (record == nullptr) {
LOG(ERROR) << "Error finding " << mount_point << " entry in fstab file.";
fs_mgr_free_fstab(fstab);
return false;
}
*device = base::FilePath(record->blk_device);
fs_mgr_free_fstab(fstab);
return true;
}
} // namespace utils
} // namespace chromeos_update_engine