mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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258 lines
8.9 KiB
C++
258 lines
8.9 KiB
C++
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "dmnt_service.hpp"
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namespace std {
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template<>
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struct hash<ams::dmnt::TargetIOFileHandle> {
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u64 operator()(ams::dmnt::TargetIOFileHandle const &handle) const noexcept {
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return handle.GetValue();
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}
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};
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}
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namespace ams::dmnt {
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namespace {
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enum TIOCreateOption : u32 {
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TIOCreateOption_CreateNew = 1,
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TIOCreateOption_CreateAlways = 2,
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TIOCreateOption_OpenExisting = 3,
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TIOCreateOption_OpenAlways = 4,
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TIOCreateOption_ResetSize = 5,
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};
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/* Nintendo uses actual pointers as file handles. We'll add a layer of indirection... */
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bool g_sd_initialized = false;
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os::Mutex g_sd_lock;
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FsFileSystem g_sd_fs;
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os::Mutex g_file_handle_lock;
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u64 g_cur_fd;
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std::unordered_map<TargetIOFileHandle, FsFile> g_file_handles;
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Result EnsureSdInitialized() {
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std::scoped_lock lk(g_sd_lock);
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R_UNLESS(!g_sd_initialized, ResultSuccess());
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R_TRY(fsOpenSdCardFileSystem(&g_sd_fs));
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g_sd_initialized = true;
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return ResultSuccess();
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}
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TargetIOFileHandle GetNewFileHandle(FsFile f) {
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std::scoped_lock lk(g_file_handle_lock);
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TargetIOFileHandle fd = { .value = g_cur_fd++ };
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g_file_handles[fd] = f;
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return fd;
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}
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Result GetFileByHandle(FsFile *out, TargetIOFileHandle handle) {
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std::scoped_lock lk(g_file_handle_lock);
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if (g_file_handles.find(handle) != g_file_handles.end()) {
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*out = g_file_handles[handle];
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return ResultSuccess();
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}
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return fs::ResultInvalidArgument();
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}
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Result CloseFileByHandle(TargetIOFileHandle handle) {
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std::scoped_lock lk(g_file_handle_lock);
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if (g_file_handles.find(handle) != g_file_handles.end()) {
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fsFileClose(&g_file_handles[handle]);
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g_file_handles.erase(handle);
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return ResultSuccess();
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}
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return fs::ResultInvalidArgument();
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}
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void FixPath(char *dst, size_t dst_size, const sf::InBuffer &path) {
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dst[dst_size - 1] = 0;
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strncpy(dst, "/", dst_size - 1);
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const char *src = reinterpret_cast<const char *>(path.GetPointer());
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size_t src_idx = 0;
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size_t dst_idx = 1;
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while (src_idx < path.GetSize() && (src[src_idx] == '/' || src[src_idx] == '\\')) {
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src_idx++;
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}
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while (src_idx < path.GetSize() && dst_idx < dst_size - 1 && src[src_idx] != 0) {
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if (src[src_idx] == '\\') {
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dst[dst_idx] = '/';
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} else {
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dst[dst_idx] = src[src_idx];
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}
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src_idx++;
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dst_idx++;
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}
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if (dst_idx < dst_size) {
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dst[dst_idx] = 0;
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}
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}
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}
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Result DebugMonitorService::TargetIO_FileOpen(sf::Out<TargetIOFileHandle> out_hnd, const sf::InBuffer &path, int open_mode, u32 create_mode) {
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R_TRY(EnsureSdInitialized());
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char fs_path[FS_MAX_PATH];
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FixPath(fs_path, sizeof(fs_path), path);
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/* Create file as required by mode. */
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if (create_mode == TIOCreateOption_CreateAlways) {
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fsFsDeleteFile(&g_sd_fs, fs_path);
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R_TRY(fsFsCreateFile(&g_sd_fs, fs_path, 0, 0));
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} else if (create_mode == TIOCreateOption_CreateNew) {
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R_TRY(fsFsCreateFile(&g_sd_fs, fs_path, 0, 0));
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} else if (create_mode == TIOCreateOption_OpenAlways) {
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fsFsCreateFile(&g_sd_fs, fs_path, 0, 0);
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}
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/* Open the file, guard to prevent failure to close. */
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FsFile f;
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R_TRY(fsFsOpenFile(&g_sd_fs, fs_path, open_mode, &f));
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auto file_guard = SCOPE_GUARD { fsFileClose(&f); };
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/* Set size if needed. */
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if (create_mode == TIOCreateOption_ResetSize) {
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R_TRY(fsFileSetSize(&f, 0));
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}
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/* Cancel guard, output file handle. */
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file_guard.Cancel();
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out_hnd.SetValue(GetNewFileHandle(f));
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return ResultSuccess();
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}
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Result DebugMonitorService::TargetIO_FileClose(TargetIOFileHandle hnd) {
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return CloseFileByHandle(hnd);
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}
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Result DebugMonitorService::TargetIO_FileRead(TargetIOFileHandle hnd, const sf::OutNonSecureBuffer &out_data, sf::Out<u32> out_read, s64 offset) {
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FsFile f;
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size_t read = 0;
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R_TRY(GetFileByHandle(&f, hnd));
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R_TRY(fsFileRead(&f, offset, out_data.GetPointer(), out_data.GetSize(), FsReadOption_None, &read));
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out_read.SetValue(static_cast<u32>(read));
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return ResultSuccess();
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}
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Result DebugMonitorService::TargetIO_FileWrite(TargetIOFileHandle hnd, const sf::InNonSecureBuffer &data, sf::Out<u32> out_written, s64 offset) {
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FsFile f;
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R_TRY(GetFileByHandle(&f, hnd));
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R_TRY(fsFileWrite(&f, offset, data.GetPointer(), data.GetSize(), FsWriteOption_None));
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out_written.SetValue(data.GetSize());
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return ResultSuccess();
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}
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Result DebugMonitorService::TargetIO_FileSetAttributes(const sf::InBuffer &path, const sf::InBuffer &attributes) {
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/* I don't really know why this command exists, Horizon doesn't allow you to set any attributes. */
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/* N just returns ResultSuccess unconditionally here. */
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return ResultSuccess();
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}
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Result DebugMonitorService::TargetIO_FileGetInformation(const sf::InBuffer &path, const sf::OutArray<u64> &out_info, sf::Out<int> is_directory) {
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R_TRY(EnsureSdInitialized());
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char fs_path[FS_MAX_PATH];
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FixPath(fs_path, sizeof(fs_path), path);
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for (size_t i = 0; i < out_info.GetSize(); i++) {
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out_info[i] = 0;
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}
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is_directory.SetValue(0);
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FsFile f;
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if (R_SUCCEEDED(fsFsOpenFile(&g_sd_fs, fs_path, FsOpenMode_Read, &f))) {
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ON_SCOPE_EXIT { fsFileClose(&f); };
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/* N doesn't check this return code. */
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if (out_info.GetSize() > 0) {
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fsFileGetSize(&f, reinterpret_cast<s64 *>(&out_info[0]));
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}
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/* TODO: N does not call fsFsGetFileTimestampRaw here, but we possibly could. */
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} else {
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FsDir dir;
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R_TRY(fsFsOpenDirectory(&g_sd_fs, fs_path, FsDirOpenMode_ReadFiles | FsDirOpenMode_ReadDirs, &dir));
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fsDirClose(&dir);
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is_directory.SetValue(1);
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}
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return ResultSuccess();
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}
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Result DebugMonitorService::TargetIO_FileSetTime(const sf::InBuffer &path, u64 create, u64 access, u64 modify) {
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/* This is another function that doesn't really need to exist, because Horizon doesn't let you set anything. */
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return ResultSuccess();
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}
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Result DebugMonitorService::TargetIO_FileSetSize(const sf::InBuffer &input, s64 size) {
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/* Why does this function take in a path and not a file handle? */
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R_TRY(EnsureSdInitialized());
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/* We will try to be better than N, here. N only treats input as a path. */
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FsFile f;
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if (input.GetSize() == sizeof(TargetIOFileHandle)) {
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R_UNLESS(R_FAILED(GetFileByHandle(&f, *reinterpret_cast<const TargetIOFileHandle *>(input.GetPointer()))), fsFileSetSize(&f, size));
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}
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char fs_path[FS_MAX_PATH];
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FixPath(fs_path, sizeof(fs_path), input);
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R_TRY(fsFsOpenFile(&g_sd_fs, fs_path, FsOpenMode_Write, &f));
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ON_SCOPE_EXIT { fsFileClose(&f); };
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return fsFileSetSize(&f, size);
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}
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Result DebugMonitorService::TargetIO_FileDelete(const sf::InBuffer &path) {
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R_TRY(EnsureSdInitialized());
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char fs_path[FS_MAX_PATH];
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FixPath(fs_path, sizeof(fs_path), path);
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return fsFsDeleteFile(&g_sd_fs, fs_path);
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}
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Result DebugMonitorService::TargetIO_FileMove(const sf::InBuffer &src_path, const sf::InBuffer &dst_path) {
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R_TRY(EnsureSdInitialized());
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char fs_src_path[FS_MAX_PATH];
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char fs_dst_path[FS_MAX_PATH];
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FixPath(fs_src_path, sizeof(fs_src_path), src_path);
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FixPath(fs_dst_path, sizeof(fs_dst_path), dst_path);
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return fsFsRenameFile(&g_sd_fs, fs_src_path, fs_dst_path);
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}
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}
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