mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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299 lines
8.3 KiB
C++
299 lines
8.3 KiB
C++
/*
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* Copyright (c) 2018 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 <unordered_map>
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#include <switch.h>
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#include "dmnt_service.hpp"
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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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static bool g_sd_initialized = false;
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static HosMutex g_sd_lock;
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static FsFileSystem g_sd_fs;
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static HosMutex g_file_handle_lock;
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static u64 g_cur_fd = 0;
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static std::unordered_map<u64, FsFile> g_file_handles;
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static Result EnsureSdInitialized() {
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std::scoped_lock<HosMutex> lk(g_sd_lock);
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if (g_sd_initialized) {
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return 0;
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}
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Result rc = fsMountSdcard(&g_sd_fs);
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if (R_SUCCEEDED(rc)) {
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g_sd_initialized = true;
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}
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return rc;
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}
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static u64 GetFileHandle(FsFile f) {
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std::scoped_lock<HosMutex> lk(g_file_handle_lock);
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u64 fd = 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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static Result GetFileByHandle(FsFile *out, u64 handle) {
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std::scoped_lock<HosMutex> 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 0;
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}
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return 0x2EE202;
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}
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static Result CloseFileByHandle(u64 handle) {
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std::scoped_lock<HosMutex> 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 0;
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}
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return 0x2EE202;
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}
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static void FixPath(char *dst, size_t dst_size, InBuffer<char> &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 = path.buffer;
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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.num_elements && (src[src_idx] == '/' || src[src_idx] == '\\')) {
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src_idx++;
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}
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while (src_idx < path.num_elements && 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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Result DebugMonitorService::TargetIO_FileOpen(OutBuffer<u64> out_hnd, InBuffer<char> path, int open_mode, u32 create_mode) {
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if (out_hnd.num_elements != 1) {
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return 0xF601;
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}
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Result rc = EnsureSdInitialized();
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if (R_FAILED(rc)) {
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return rc;
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}
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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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if (create_mode == TIOCreateOption_CreateAlways) {
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fsFsDeleteFile(&g_sd_fs, fs_path);
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rc = fsFsCreateFile(&g_sd_fs, fs_path, 0, 0);
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} else if (create_mode == TIOCreateOption_CreateNew) {
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rc = fsFsCreateFile(&g_sd_fs, fs_path, 0, 0);
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}
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if (R_FAILED(rc)) {
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return rc;
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}
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FsFile f;
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rc = fsFsOpenFile(&g_sd_fs, fs_path, open_mode, &f);
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if (R_FAILED(rc)) {
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if (create_mode == TIOCreateOption_OpenAlways) {
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fsFsCreateFile(&g_sd_fs, fs_path, 0, 0);
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rc = fsFsOpenFile(&g_sd_fs, fs_path, open_mode, &f);
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}
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}
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if (R_SUCCEEDED(rc)) {
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if (create_mode == TIOCreateOption_ResetSize) {
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rc = fsFileSetSize(&f, 0);
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}
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if (R_SUCCEEDED(rc)) {
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out_hnd[0] = GetFileHandle(f);
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} else {
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fsFileClose(&f);
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}
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}
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return rc;
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}
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Result DebugMonitorService::TargetIO_FileClose(InBuffer<u64> hnd) {
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if (hnd.num_elements != 1) {
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return 0xF601;
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}
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return CloseFileByHandle(hnd[0]);
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}
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Result DebugMonitorService::TargetIO_FileRead(InBuffer<u64> hnd, OutBuffer<u8, BufferType_Type1> out_data, Out<u32> out_read, u64 offset) {
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if (hnd.num_elements != 1) {
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return 0xF601;
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}
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FsFile f;
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Result rc = GetFileByHandle(&f, hnd[0]);
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if (R_FAILED(rc)) {
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return rc;
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}
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size_t read = 0;
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rc = fsFileRead(&f, offset, out_data.buffer, out_data.num_elements, &read);
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out_read.SetValue(static_cast<u32>(read));
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return rc;
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}
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Result DebugMonitorService::TargetIO_FileWrite(InBuffer<u64> hnd, InBuffer<u8, BufferType_Type1> data, Out<u32> out_written, u64 offset) {
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if (hnd.num_elements != 1) {
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return 0xF601;
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}
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FsFile f;
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Result rc = GetFileByHandle(&f, hnd[0]);
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if (R_FAILED(rc)) {
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return rc;
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}
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rc = fsFileWrite(&f, offset, data.buffer, data.num_elements);
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if (R_SUCCEEDED(rc)) {
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out_written.SetValue(data.num_elements);
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}
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return rc;
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}
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Result DebugMonitorService::TargetIO_FileSetAttributes(InBuffer<char> path, InBuffer<u8> 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 0x0 unconditionally here. */
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return 0x0;
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}
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Result DebugMonitorService::TargetIO_FileGetInformation(InBuffer<char> path, OutBuffer<u64> out_info, Out<int> is_directory) {
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if (out_info.num_elements != 4) {
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return 0xF601;
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}
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Result rc = EnsureSdInitialized();
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if (R_FAILED(rc)) {
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return rc;
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}
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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.num_elements; 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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rc = fsFsOpenFile(&g_sd_fs, fs_path, FS_OPEN_READ, &f);
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if (R_SUCCEEDED(rc)) {
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ON_SCOPE_EXIT { fsFileClose(&f); };
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/* N doesn't check this return code. */
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fsFileGetSize(&f, &out_info[0]);
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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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rc = fsFsOpenDirectory(&g_sd_fs, fs_path, FS_DIROPEN_FILE | FS_DIROPEN_DIRECTORY, &dir);
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if (R_SUCCEEDED(rc)) {
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fsDirClose(&dir);
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is_directory.SetValue(1);
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}
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}
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return rc;
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}
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Result DebugMonitorService::TargetIO_FileSetTime(InBuffer<char> 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 0x0;
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}
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Result DebugMonitorService::TargetIO_FileSetSize(InBuffer<char> input, u64 size) {
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/* Why does this function take in a path and not a file handle? */
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/* We will try to be better than N, here. N only treats input as a path. */
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if (input.num_elements == sizeof(u64)) {
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FsFile f;
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if (R_SUCCEEDED(GetFileByHandle(&f, reinterpret_cast<u64 *>(input.buffer)[0]))) {
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return fsFileSetSize(&f, size);
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}
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}
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Result rc = EnsureSdInitialized();
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if (R_FAILED(rc)) {
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return rc;
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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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FsFile f;
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rc = fsFsOpenFile(&g_sd_fs, fs_path, FS_OPEN_WRITE, &f);
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if (R_SUCCEEDED(rc)) {
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rc = fsFileSetSize(&f, size);
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fsFileClose(&f);
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}
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return rc;
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}
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Result DebugMonitorService::TargetIO_FileDelete(InBuffer<char> path) {
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Result rc = EnsureSdInitialized();
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if (R_FAILED(rc)) {
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return rc;
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}
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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(InBuffer<char> path0, InBuffer<char> path1) {
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Result rc = EnsureSdInitialized();
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if (R_FAILED(rc)) {
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return rc;
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}
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char fs_path0[FS_MAX_PATH];
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char fs_path1[FS_MAX_PATH];
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FixPath(fs_path0, sizeof(fs_path0), path0);
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FixPath(fs_path1, sizeof(fs_path1), path1);
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return fsFsRenameFile(&g_sd_fs, fs_path0, fs_path1);
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}
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