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/*
* Copyright (C) 2015 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 <stdio.h>
#include <string>
#include "fs_mgr.h"
#include "fs_mgr_priv.h"
// Returns "_a" or "_b" based on androidboot.slot_suffix in kernel cmdline, or an empty string
// if that parameter does not exist.
std::string fs_mgr_get_slot_suffix() {
std::string ab_suffix;
fs_mgr_get_boot_config("slot_suffix", &ab_suffix);
return ab_suffix;
}
// Updates |fstab| for slot_suffix. Returns true on success, false on error.
bool fs_mgr_update_for_slotselect(struct fstab *fstab) {
int n;
std::string ab_suffix;
for (n = 0; n < fstab->num_entries; n++) {
fstab_rec& record = fstab->recs[n];
if (record.fs_mgr_flags & MF_SLOTSELECT) {
if (ab_suffix.empty()) {
ab_suffix = fs_mgr_get_slot_suffix();
// Return false if failed to get ab_suffix when MF_SLOTSELECT is specified.
if (ab_suffix.empty()) return false;
}
char* new_blk_device;
if (asprintf(&new_blk_device, "%s%s", record.blk_device, ab_suffix.c_str()) <= 0) {
return false;
}
free(record.blk_device);
record.blk_device = new_blk_device;
char* new_partition_name;
if (record.logical_partition_name) {
if (asprintf(&new_partition_name, "%s%s", record.logical_partition_name,
ab_suffix.c_str()) <= 0) {
return false;
}
free(record.logical_partition_name);
record.logical_partition_name = new_partition_name;
}
}
}
return true;
}
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