/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <unordered_map>
#include "dmnt_service.hpp"
namespace sts::dmnt {
namespace {
enum TIOCreateOption : u32 {
TIOCreateOption_CreateNew = 1,
TIOCreateOption_CreateAlways = 2,
TIOCreateOption_OpenExisting = 3,
TIOCreateOption_OpenAlways = 4,
TIOCreateOption_ResetSize = 5,
};
/* Nintendo uses actual pointers as file handles. We'll add a layer of indirection... */
bool g_sd_initialized = false;
os::Mutex g_sd_lock;
FsFileSystem g_sd_fs;
os::Mutex g_file_handle_lock;
u64 g_cur_fd;
std::unordered_map<u64, FsFile> g_file_handles;
Result EnsureSdInitialized() {
std::scoped_lock lk(g_sd_lock);
if (g_sd_initialized) {
return ResultSuccess;
}
R_TRY(fsMountSdcard(&g_sd_fs));
g_sd_initialized = true;
return ResultSuccess;
}
u64 GetNewFileHandle(FsFile f) {
std::scoped_lock lk(g_file_handle_lock);
u64 fd = g_cur_fd++;
g_file_handles[fd] = f;
return fd;
}
Result GetFileByHandle(FsFile *out, u64 handle) {
std::scoped_lock lk(g_file_handle_lock);
if (g_file_handles.find(handle) != g_file_handles.end()) {
*out = g_file_handles[handle];
return ResultSuccess;
}
return ResultFsInvalidArgument;
}
Result CloseFileByHandle(u64 handle) {
std::scoped_lock lk(g_file_handle_lock);
if (g_file_handles.find(handle) != g_file_handles.end()) {
fsFileClose(&g_file_handles[handle]);
g_file_handles.erase(handle);
return ResultSuccess;
}
return ResultFsInvalidArgument;
}
void FixPath(char *dst, size_t dst_size, InBuffer<char> &path) {
dst[dst_size - 1] = 0;
strncpy(dst, "/", dst_size - 1);
const char *src = path.buffer;
size_t src_idx = 0;
size_t dst_idx = 1;
while (src_idx < path.num_elements && (src[src_idx] == '/' || src[src_idx] == '\\')) {
src_idx++;
}
while (src_idx < path.num_elements && dst_idx < dst_size - 1 && src[src_idx] != 0) {
if (src[src_idx] == '\\') {
dst[dst_idx] = '/';
} else {
dst[dst_idx] = src[src_idx];
}
src_idx++;
dst_idx++;
}
if (dst_idx < dst_size) {
dst[dst_idx] = 0;
}
}
}
Result DebugMonitorService::TargetIO_FileOpen(OutBuffer<u64> out_hnd, InBuffer<char> path, int open_mode, u32 create_mode) {
if (out_hnd.num_elements != 1) {
/* Serialization error. */
return ResultKernelConnectionClosed;
}
R_TRY(EnsureSdInitialized());
char fs_path[FS_MAX_PATH];
FixPath(fs_path, sizeof(fs_path), path);
/* Create file as required by mode. */
if (create_mode == TIOCreateOption_CreateAlways) {
fsFsDeleteFile(&g_sd_fs, fs_path);
R_TRY(fsFsCreateFile(&g_sd_fs, fs_path, 0, 0));
} else if (create_mode == TIOCreateOption_CreateNew) {
R_TRY(fsFsCreateFile(&g_sd_fs, fs_path, 0, 0));
} else if (create_mode == TIOCreateOption_OpenAlways) {
fsFsCreateFile(&g_sd_fs, fs_path, 0, 0);
}
/* Open the file, guard to prevent failure to close. */
FsFile f;
R_TRY(fsFsOpenFile(&g_sd_fs, fs_path, open_mode, &f));
auto file_guard = SCOPE_GUARD {
fsFileClose(&f);
};
/* Set size if needed. */
if (create_mode == TIOCreateOption_ResetSize) {
R_TRY(fsFileSetSize(&f, 0));
}
/* Cancel guard, output file handle. */
file_guard.Cancel();
out_hnd[0] = GetNewFileHandle(f);
return ResultSuccess;
}
Result DebugMonitorService::TargetIO_FileClose(InBuffer<u64> hnd) {
if (hnd.num_elements != 1) {
/* Serialization error. */
return ResultKernelConnectionClosed;
}
return CloseFileByHandle(hnd[0]);
}
Result DebugMonitorService::TargetIO_FileRead(InBuffer<u64> hnd, OutBuffer<u8, BufferType_Type1> out_data, Out<u32> out_read, u64 offset) {
if (hnd.num_elements != 1) {
/* Serialization error. */
return ResultKernelConnectionClosed;
}
FsFile f;
size_t read = 0;
R_TRY(GetFileByHandle(&f, hnd[0]));
R_TRY(fsFileRead(&f, offset, out_data.buffer, out_data.num_elements, FS_READOPTION_NONE, &read));
out_read.SetValue(static_cast<u32>(read));
return ResultSuccess;
}
Result DebugMonitorService::TargetIO_FileWrite(InBuffer<u64> hnd, InBuffer<u8, BufferType_Type1> data, Out<u32> out_written, u64 offset) {
if (hnd.num_elements != 1) {
/* Serialization error. */
return ResultKernelConnectionClosed;
}
FsFile f;
R_TRY(GetFileByHandle(&f, hnd[0]));
R_TRY(fsFileWrite(&f, offset, data.buffer, data.num_elements, FS_WRITEOPTION_NONE));
out_written.SetValue(data.num_elements);
return ResultSuccess;
}
Result DebugMonitorService::TargetIO_FileSetAttributes(InBuffer<char> path, InBuffer<u8> attributes) {
/* I don't really know why this command exists, Horizon doesn't allow you to set any attributes. */
/* N just returns ResultSuccess unconditionally here. */
return ResultSuccess;
}
Result DebugMonitorService::TargetIO_FileGetInformation(InBuffer<char> path, OutBuffer<u64> out_info, Out<int> is_directory) {
if (out_info.num_elements != 4) {
/* Serialization error. */
return ResultKernelConnectionClosed;
}
R_TRY(EnsureSdInitialized());
char fs_path[FS_MAX_PATH];
FixPath(fs_path, sizeof(fs_path), path);
for (size_t i = 0; i < out_info.num_elements; i++) {
out_info[i] = 0;
}
is_directory.SetValue(0);
FsFile f;
if (R_SUCCEEDED(fsFsOpenFile(&g_sd_fs, fs_path, FS_OPEN_READ, &f))) {
ON_SCOPE_EXIT { fsFileClose(&f); };
/* N doesn't check this return code. */
fsFileGetSize(&f, &out_info[0]);
/* TODO: N does not call fsFsGetFileTimestampRaw here, but we possibly could. */
} else {
FsDir dir;
R_TRY(fsFsOpenDirectory(&g_sd_fs, fs_path, FS_DIROPEN_FILE | FS_DIROPEN_DIRECTORY, &dir));
fsDirClose(&dir);
is_directory.SetValue(1);
}
return ResultSuccess;
}
Result DebugMonitorService::TargetIO_FileSetTime(InBuffer<char> path, u64 create, u64 access, u64 modify) {
/* This is another function that doesn't really need to exist, because Horizon doesn't let you set anything. */
return ResultSuccess;
}
Result DebugMonitorService::TargetIO_FileSetSize(InBuffer<char> input, u64 size) {
/* Why does this function take in a path and not a file handle? */
/* We will try to be better than N, here. N only treats input as a path. */
if (input.num_elements == sizeof(u64)) {
FsFile f;
if (R_SUCCEEDED(GetFileByHandle(&f, reinterpret_cast<u64 *>(input.buffer)[0]))) {
return fsFileSetSize(&f, size);
}
}
R_TRY(EnsureSdInitialized());
char fs_path[FS_MAX_PATH];
FixPath(fs_path, sizeof(fs_path), input);
FsFile f;
R_TRY(fsFsOpenFile(&g_sd_fs, fs_path, FS_OPEN_WRITE, &f));
ON_SCOPE_EXIT { fsFileClose(&f); };
return fsFileSetSize(&f, size);
}
Result DebugMonitorService::TargetIO_FileDelete(InBuffer<char> path) {
R_TRY(EnsureSdInitialized());
char fs_path[FS_MAX_PATH];
FixPath(fs_path, sizeof(fs_path), path);
return fsFsDeleteFile(&g_sd_fs, fs_path);
}
Result DebugMonitorService::TargetIO_FileMove(InBuffer<char> path0, InBuffer<char> path1) {
R_TRY(EnsureSdInitialized());
char fs_path0[FS_MAX_PATH];
char fs_path1[FS_MAX_PATH];
FixPath(fs_path0, sizeof(fs_path0), path0);
FixPath(fs_path1, sizeof(fs_path1), path1);
return fsFsRenameFile(&g_sd_fs, fs_path0, fs_path1);
}
}
