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// Copyright 2024-2026, Amlal El Mahrouss (amlal@nekernel.org)
// Licensed under the Apache License, Version 2.0 (see LICENSE file)
// Official repository: https://github.com/ne-foss-org/nekernel
#include <tools/libmkfs/mkfs.hpp>
#include <tools/libmkfs/openhefs.hpp>
#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <limits>
static std::uint16_t kVersion = kOpenHeFSVersion;
static std::uint16_t kNumericalBase = 10;
/// AMLALE: Should we enforce 4GB by default? I believe it should be 1GB. Depending on use cases.
static std::size_t kDiskSize = mkfs::detail::gib_cast(4UL);
static std::u8string kDiskLabel;
static std::size_t kDiskSectorSz = 512;
int main(int argc, char** argv) {
if (argc != 10) {
mkfs::console_out()
<< "hefs: usage: mkfs.hefs -L=<label> -s=<sector_size> -b=<ind_start> -e=<ind_end> "
"-bs=<block_start> -be=<block_end> -is=<in_start> -ie=<in_end> "
"-S=<disk_size_GB> -o=<output_device>\n";
return EXIT_FAILURE;
}
std::string args = mkfs::detail::build_args(argc, argv);
auto output_path = mkfs::get_option<char>(args, "o");
if (output_path.empty()) {
mkfs::console_out() << "hefs: error: Missing -o <output_device> argument.\n";
return EXIT_FAILURE;
}
auto opt_s = mkfs::get_option<char>(args, "s");
std::size_t parsed_s = 0;
if (!mkfs::detail::parse_signed(opt_s, parsed_s, kNumericalBase) || parsed_s == 0) {
mkfs::console_out() << "hefs: error: Invalid sector size \"" << opt_s
<< "\". Must be a positive integer.\n";
return EXIT_FAILURE;
}
if ((parsed_s & (parsed_s - 1)) != 0) {
mkfs::console_out() << "hefs: error: Sector size \"" << parsed_s
<< "\" is not a power of two.\n";
return EXIT_FAILURE;
}
kDiskSectorSz = static_cast<size_t>(parsed_s);
auto opt_L = mkfs::get_option<char>(args, "L");
if (!opt_L.empty()) {
kDiskLabel.clear();
for (char c : opt_L) kDiskLabel.push_back(static_cast<char8_t>(c));
} else {
kDiskLabel.clear();
for (size_t i = 0; i < kOpenHeFSPartNameLen && kOpenHeFSDefaultVolumeName[i] != u'\0'; ++i) {
kDiskLabel.push_back(static_cast<char8_t>(kOpenHeFSDefaultVolumeName[i]));
}
}
auto opt_S = mkfs::get_option<char>(args, "S");
std::size_t gb = 0;
if (!mkfs::detail::parse_decimal(opt_S, gb) || gb == 0ULL) {
mkfs::console_out() << "hefs: error: Invalid disk size \"" << opt_S
<< "\". Must be a positive integer.\n";
return EXIT_FAILURE;
}
std::size_t max_gb = std::numeric_limits<uint64_t>::max() / (1024ULL * 1024ULL * 1024ULL);
if (gb > max_gb) {
mkfs::console_out() << "hefs: error: Disk size \"" << gb << "GB\" is too large.\n";
return EXIT_FAILURE;
}
kDiskSize = static_cast<size_t>(gb * 1024ULL * 1024ULL * 1024ULL);
auto opt_b = mkfs::get_option<char>(args, "b");
auto opt_e = mkfs::get_option<char>(args, "e");
auto opt_bs = mkfs::get_option<char>(args, "bs");
auto opt_be = mkfs::get_option<char>(args, "be");
auto opt_is = mkfs::get_option<char>(args, "is");
auto opt_ie = mkfs::get_option<char>(args, "ie");
std::size_t start_ind = 0, end_ind = 0;
std::size_t start_block = 0, end_block = 0;
std::size_t start_in = 0, end_in = 0;
if (!mkfs::detail::parse_signed(opt_b, start_ind, kNumericalBase)) {
mkfs::console_out() << "hefs: error: Invalid -b <dec> argument.\n";
return EXIT_FAILURE;
}
if (!mkfs::detail::parse_signed(opt_e, end_ind, kNumericalBase) || end_ind <= start_ind) {
mkfs::console_out() << "hefs: error: Invalid or out-of-range -e <dec> argument.\n";
return EXIT_FAILURE;
}
if (!mkfs::detail::parse_signed(opt_bs, start_block, kNumericalBase)) {
mkfs::console_out() << "hefs: error: Invalid -bs <dec> argument.\n";
return EXIT_FAILURE;
}
if (!mkfs::detail::parse_signed(opt_be, end_block, kNumericalBase) || end_block <= start_block) {
mkfs::console_out() << "hefs: error: Invalid or out-of-range -be <dec> argument.\n";
return EXIT_FAILURE;
}
if (!mkfs::detail::parse_signed(opt_is, start_in, kNumericalBase)) {
mkfs::console_out() << "hefs: error: Invalid -is <dec> argument.\n";
return EXIT_FAILURE;
}
if (!mkfs::detail::parse_signed(opt_ie, end_in, kNumericalBase) || end_in <= start_in) {
mkfs::console_out() << "hefs: error: Invalid or out-of-range -ie <dec> argument.\n";
return EXIT_FAILURE;
}
if (static_cast<size_t>(end_block) * kDiskSectorSz > kDiskSize ||
static_cast<size_t>(end_ind) > kDiskSize || static_cast<size_t>(end_in) > kDiskSize) {
mkfs::console_out() << "hefs: error: One or more ranges exceed disk size.\n";
return EXIT_FAILURE;
}
std::ofstream output_device(output_path, std::ios::binary);
if (!output_device.good()) {
mkfs::console_out() << "hefs: error: Unable to open output device: " << output_path << "\n";
return EXIT_FAILURE;
}
mkfs::hefs::BootNode boot_node;
std::memset(&boot_node, 0, sizeof(boot_node));
boot_node.version = kVersion;
boot_node.diskKind = mkfs::hefs::kOpenHeFSHardDrive;
boot_node.encoding = mkfs::hefs::kOpenHeFSEncodingFlagsUTF8;
boot_node.diskSize = kDiskSize;
boot_node.sectorSize = kDiskSectorSz;
boot_node.sectorCount = kDiskSize / kDiskSectorSz;
boot_node.startIND = static_cast<size_t>(start_ind) + sizeof(mkfs::hefs::BootNode);
boot_node.endIND = static_cast<size_t>(end_ind);
boot_node.startIN = static_cast<size_t>(start_in);
boot_node.endIN = static_cast<size_t>(end_in);
boot_node.startBlock = static_cast<size_t>(start_block);
boot_node.endBlock = static_cast<size_t>(end_block);
boot_node.indCount = 0UL;
boot_node.diskStatus = mkfs::hefs::kOpenHeFSStatusUnlocked;
static_assert(sizeof(boot_node.magic) >= kOpenHeFSMagicLen,
"BootNode::magic too small to hold kOpenHeFSMagicLen");
std::memset(boot_node.magic, 0, sizeof(boot_node.magic));
size_t magic_copy = (sizeof(boot_node.magic) < kOpenHeFSMagicLen - 1) ? sizeof(boot_node.magic)
: (kOpenHeFSMagicLen - 1);
std::memcpy(boot_node.magic, kOpenHeFSMagic, magic_copy);
boot_node.magic[magic_copy] = 0;
constexpr size_t vol_slots = kOpenHeFSPartNameLen;
std::memset(boot_node.volumeName, 0, sizeof(boot_node.volumeName));
size_t label_units = std::min(kDiskLabel.size(), vol_slots - 1);
for (size_t i{}; i < label_units; ++i) {
boot_node.volumeName[i] = static_cast<char8_t>(kDiskLabel[i]);
}
boot_node.volumeName[label_units] = 0U;
output_device.seekp(static_cast<std::streamoff>(start_ind));
if (!output_device.good()) {
mkfs::console_out() << "hefs: error: Failed seek to index start.\n";
return EXIT_FAILURE;
}
output_device.write(reinterpret_cast<const char*>(&boot_node), sizeof(boot_node));
if (!output_device.good()) {
mkfs::console_out() << "hefs: error: Unable to write BootNode to output device: " << output_path
<< "\n";
return EXIT_FAILURE;
}
output_device.seekp(static_cast<std::streamoff>(kDiskSize - 1));
if (!output_device.good()) {
mkfs::console_out() << "hefs: error: Failed seek to startIND.\n";
return EXIT_FAILURE;
}
output_device.put(0);
output_device.flush();
output_device.close();
mkfs::console_out() << "hefs: info: Wrote filesystem to output device: " << output_path << "\n";
return EXIT_SUCCESS;
}
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