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/*
* Copyright (C) 2018 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 <getopt.h>
#include <inttypes.h>
#include <stdio.h>
#include <sysexits.h>
#include <memory>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <liblp/builder.h>
#include <liblp/liblp.h>
using namespace android;
using namespace android::fs_mgr;
/* Prints program usage to |where|. */
static int usage(int /* argc */, char* argv[]) {
fprintf(stderr,
"%s - command-line tool for creating Android Logical Partition images.\n"
"\n"
"Usage:\n"
" %s [options]\n"
"\n"
"Required options:\n"
" -d,--device-size=SIZE Size of the block device for logical partitions.\n"
" -m,--metadata-size=SIZE Maximum size to reserve for partition metadata.\n"
" -s,--metadata-slots=COUNT Number of slots to store metadata copies.\n"
" -p,--partition=DATA Add a partition given the data, see below.\n"
" -o,--output=FILE Output file.\n"
"\n"
"Optional:\n"
" -b,--block-size=SIZE Physical block size, defaults to 4096.\n"
" -a,--alignment=N Optimal partition alignment in bytes.\n"
" -O,--alignment-offset=N Alignment offset in bytes to device parent.\n"
" -S,--sparse Output a sparse image for fastboot.\n"
" -i,--image=PARTITION=FILE If building a sparse image for fastboot, include\n"
" the given file (or sparse file) as initial data for\n"
" the named partition.\n"
"\n"
"Partition data format:\n"
" <name>:<guid>:<attributes>:<size>\n"
" Attrs must be 'none' or 'readonly'.\n",
argv[0], argv[0]);
return EX_USAGE;
}
int main(int argc, char* argv[]) {
struct option options[] = {
{ "device-size", required_argument, nullptr, 'd' },
{ "metadata-size", required_argument, nullptr, 'm' },
{ "metadata-slots", required_argument, nullptr, 's' },
{ "partition", required_argument, nullptr, 'p' },
{ "output", required_argument, nullptr, 'o' },
{ "help", no_argument, nullptr, 'h' },
{ "alignment-offset", required_argument, nullptr, 'O' },
{ "alignment", required_argument, nullptr, 'a' },
{ "sparse", no_argument, nullptr, 'S' },
{ "block-size", required_argument, nullptr, 'b' },
{ "image", required_argument, nullptr, 'i' },
{ nullptr, 0, nullptr, 0 },
};
uint64_t blockdevice_size = 0;
uint32_t metadata_size = 0;
uint32_t metadata_slots = 0;
uint32_t alignment_offset = 0;
uint32_t alignment = kDefaultPartitionAlignment;
uint32_t block_size = 4096;
std::string output_path;
std::vector<std::string> partitions;
std::map<std::string, std::string> images;
bool output_sparse = false;
int rv;
int index;
while ((rv = getopt_long_only(argc, argv, "d:m:s:p:o:h", options, &index)) != -1) {
switch (rv) {
case 'h':
return usage(argc, argv);
case 'd':
if (!android::base::ParseUint(optarg, &blockdevice_size)) {
fprintf(stderr, "Invalid argument to --device-size.\n");
return EX_USAGE;
}
break;
case 'm':
if (!android::base::ParseUint(optarg, &metadata_size)) {
fprintf(stderr, "Invalid argument to --metadata-size.\n");
return EX_USAGE;
}
break;
case 's':
if (!android::base::ParseUint(optarg, &metadata_slots)) {
fprintf(stderr, "Invalid argument to --metadata-slots.\n");
return EX_USAGE;
}
break;
case 'p':
partitions.push_back(optarg);
break;
case 'o':
output_path = optarg;
break;
case 'O':
if (!android::base::ParseUint(optarg, &alignment_offset)) {
fprintf(stderr, "Invalid argument to --alignment-offset.\n");
return EX_USAGE;
}
break;
case 'a':
if (!android::base::ParseUint(optarg, &alignment)) {
fprintf(stderr, "Invalid argument to --alignment.\n");
return EX_USAGE;
}
break;
case 'S':
output_sparse = true;
break;
case 'b':
if (!android::base::ParseUint(optarg, &block_size) || !block_size) {
fprintf(stderr, "Invalid argument to --block-size.\n");
return EX_USAGE;
}
break;
case 'i':
{
char* separator = strchr(optarg, '=');
if (!separator || separator == optarg || !strlen(separator + 1)) {
fprintf(stderr, "Expected PARTITION=FILE.\n");
return EX_USAGE;
}
*separator = '\0';
std::string partition_name(optarg);
std::string file(separator + 1);
images[partition_name] = file;
break;
}
default:
break;
}
}
// Check for empty arguments so we can print a more helpful message rather
// than error on each individual missing argument.
if (optind == 1) {
return usage(argc, argv);
}
if (!blockdevice_size) {
fprintf(stderr, "--device-size needs more than 0 bytes of disk space.\n");
return EX_USAGE;
}
if (!metadata_size) {
fprintf(stderr, "--metadata-size must be more than 0 bytes.\n");
return EX_USAGE;
}
if (!metadata_slots) {
fprintf(stderr, "--metadata-slots must be more than 0.\n");
return EX_USAGE;
}
if (output_path.empty()) {
fprintf(stderr, "--output must specify a valid path.\n");
return EX_USAGE;
}
if (partitions.empty()) {
fprintf(stderr, "Partition table must have at least one entry.\n");
return EX_USAGE;
}
if (!images.empty() && !output_sparse) {
fprintf(stderr, "Cannot write partition data for non-sparse images.\n");
return EX_USAGE;
}
BlockDeviceInfo device_info(blockdevice_size, alignment, alignment_offset);
std::unique_ptr<MetadataBuilder> builder =
MetadataBuilder::New(device_info, metadata_size, metadata_slots);
for (const auto& partition_info : partitions) {
std::vector<std::string> parts = android::base::Split(partition_info, ":");
if (parts.size() != 4) {
fprintf(stderr, "Partition info has invalid formatting.\n");
return EX_USAGE;
}
std::string name = parts[0];
if (!name.length()) {
fprintf(stderr, "Partition must have a valid name.\n");
return EX_USAGE;
}
uint64_t size;
if (!android::base::ParseUint(parts[3].c_str(), &size)) {
fprintf(stderr, "Partition must have a valid size.\n");
return EX_USAGE;
}
uint32_t attribute_flags = 0;
std::string attributes = parts[2];
if (attributes == "readonly") {
attribute_flags |= LP_PARTITION_ATTR_READONLY;
} else if (attributes != "none") {
fprintf(stderr, "Attribute not recognized: %s\n", attributes.c_str());
return EX_USAGE;
}
Partition* partition = builder->AddPartition(name, parts[1], attribute_flags);
if (!builder->GrowPartition(partition, size)) {
fprintf(stderr, "Not enough space on device for partition %s with size %" PRIu64 "\n",
name.c_str(), size);
return EX_SOFTWARE;
}
}
std::unique_ptr<LpMetadata> metadata = builder->Export();
if (output_sparse) {
if (!WriteToSparseFile(output_path.c_str(), *metadata.get(), block_size, images)) {
return EX_CANTCREAT;
}
} else if (!WriteToImageFile(output_path.c_str(), *metadata.get())) {
return EX_CANTCREAT;
}
return EX_OK;
}
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