Atmosphere/libraries/libstratosphere/source/fs/fs_sd_card.cpp

91 lines
3.6 KiB
C++

/*
* Copyright (c) 2018-2020 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 <stratosphere.hpp>
#include "fsa/fs_mount_utils.hpp"
namespace ams::fs {
namespace {
constexpr inline const char AtmosphereErrorReportDirectory[] = "/atmosphere/erpt_reports";
/* NOTE: Nintendo does not attach a generator to a mounted SD card filesystem. */
/* However, it is desirable for homebrew to be able to access SD via common path. */
class SdCardCommonMountNameGenerator : public fsa::ICommonMountNameGenerator, public impl::Newable {
public:
explicit SdCardCommonMountNameGenerator() { /* ... */ }
virtual Result GenerateCommonMountName(char *dst, size_t dst_size) override {
/* Determine how much space we need. */
const size_t needed_size = strnlen(impl::SdCardFileSystemMountName, MountNameLengthMax) + 2;
AMS_ABORT_UNLESS(dst_size >= needed_size);
/* Generate the name. */
auto size = std::snprintf(dst, dst_size, "%s:", impl::SdCardFileSystemMountName);
AMS_ASSERT(static_cast<size_t>(size) == needed_size - 1);
return ResultSuccess();
}
};
}
Result MountSdCard(const char *name) {
/* Validate the mount name. */
R_TRY(impl::CheckMountNameAllowingReserved(name));
/* Open the SD card. This uses libnx bindings. */
FsFileSystem fs;
R_TRY(fsOpenSdCardFileSystem(std::addressof(fs)));
/* Allocate a new filesystem wrapper. */
auto fsa = std::make_unique<RemoteFileSystem>(fs);
R_UNLESS(fsa != nullptr, fs::ResultAllocationFailureInSdCardA());
/* Allocate a new mountname generator. */
/* NOTE: Nintendo does not attach a generator. */
auto generator = std::make_unique<SdCardCommonMountNameGenerator>();
R_UNLESS(generator != nullptr, fs::ResultAllocationFailureInSdCardA());
/* Register. */
return fsa::Register(name, std::move(fsa), std::move(generator));
}
Result MountSdCardErrorReportDirectoryForAtmosphere(const char *name) {
/* Validate the mount name. */
R_TRY(impl::CheckMountName(name));
/* Open the SD card. This uses libnx bindings. */
FsFileSystem fs;
R_TRY(fsOpenSdCardFileSystem(std::addressof(fs)));
/* Allocate a new filesystem wrapper. */
std::unique_ptr<fsa::IFileSystem> fsa = std::make_unique<RemoteFileSystem>(fs);
R_UNLESS(fsa != nullptr, fs::ResultAllocationFailureInSdCardA());
/* Ensure that the error report directory exists. */
R_TRY(fssystem::EnsureDirectoryRecursively(fsa.get(), AtmosphereErrorReportDirectory));
/* Create a subdirectory filesystem. */
auto subdir_fs = std::make_unique<fssystem::SubDirectoryFileSystem>(std::move(fsa), AtmosphereErrorReportDirectory);
R_UNLESS(subdir_fs != nullptr, fs::ResultAllocationFailureInSdCardA());
/* Register. */
return fsa::Register(name, std::move(subdir_fs));
}
}