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yuzu/src/common/fs/fs.cpp
Morph 76b2313b25 common: fs: Amend IsFile check in FileOpen / (Write/Append)StringToFile 
This check was preventing files with the Write or Append file access modes from being created, as per the documented behavior in FileAccessMode.
This amends the check to test for the existence of a filesystem object prior to checking whether it is a regular file.
Thanks to liushuyu for pointing out that removing the check altogether would not guard against attempting to open non-regular files such as directories, symlinks, FIFO (pipes), sockets, block devices, or character devices.
The documentation has also been updated for these functions to clarify that a file refers to a regular file.
2021-06-22 15:06:58 -04:00

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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/fs/file.h"
#include "common/fs/fs.h"
#include "common/fs/path_util.h"
#include "common/logging/log.h"
namespace Common::FS {
namespace fs = std::filesystem;
// File Operations
bool NewFile(const fs::path& path, u64 size) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return false;
}
if (!Exists(path.parent_path())) {
LOG_ERROR(Common_Filesystem, "Parent directory of path={} does not exist",
PathToUTF8String(path));
return false;
}
if (Exists(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} exists", PathToUTF8String(path));
return false;
}
IOFile io_file{path, FileAccessMode::Write};
if (!io_file.IsOpen()) {
LOG_ERROR(Common_Filesystem, "Failed to create a file at path={}", PathToUTF8String(path));
return false;
}
if (!io_file.SetSize(size)) {
LOG_ERROR(Common_Filesystem, "Failed to resize the file at path={} to size={}",
PathToUTF8String(path), size);
return false;
}
io_file.Close();
LOG_DEBUG(Common_Filesystem, "Successfully created a file at path={} with size={}",
PathToUTF8String(path), size);
return true;
}
bool RemoveFile(const fs::path& path) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return false;
}
if (!Exists(path)) {
LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} does not exist",
PathToUTF8String(path));
return true;
}
if (!IsFile(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a file",
PathToUTF8String(path));
return false;
}
std::error_code ec;
fs::remove(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem, "Failed to remove the file at path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return false;
}
LOG_DEBUG(Common_Filesystem, "Successfully removed the file at path={}",
PathToUTF8String(path));
return true;
}
bool RenameFile(const fs::path& old_path, const fs::path& new_path) {
if (!ValidatePath(old_path) || !ValidatePath(new_path)) {
LOG_ERROR(Common_Filesystem,
"One or both input path(s) is not valid, old_path={}, new_path={}",
PathToUTF8String(old_path), PathToUTF8String(new_path));
return false;
}
if (!Exists(old_path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at old_path={} does not exist",
PathToUTF8String(old_path));
return false;
}
if (!IsFile(old_path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at old_path={} is not a file",
PathToUTF8String(old_path));
return false;
}
if (Exists(new_path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at new_path={} exists",
PathToUTF8String(new_path));
return false;
}
std::error_code ec;
fs::rename(old_path, new_path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem,
"Failed to rename the file from old_path={} to new_path={}, ec_message={}",
PathToUTF8String(old_path), PathToUTF8String(new_path), ec.message());
return false;
}
LOG_DEBUG(Common_Filesystem, "Successfully renamed the file from old_path={} to new_path={}",
PathToUTF8String(old_path), PathToUTF8String(new_path));
return true;
}
std::shared_ptr<IOFile> FileOpen(const fs::path& path, FileAccessMode mode, FileType type,
FileShareFlag flag) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return nullptr;
}
if (Exists(path) && !IsFile(path)) {
LOG_ERROR(Common_Filesystem,
"Filesystem object at path={} exists and is not a regular file",
PathToUTF8String(path));
return nullptr;
}
auto io_file = std::make_shared<IOFile>(path, mode, type, flag);
if (!io_file->IsOpen()) {
io_file.reset();
LOG_ERROR(Common_Filesystem,
"Failed to open the file at path={} with mode={}, type={}, flag={}",
PathToUTF8String(path), mode, type, flag);
return nullptr;
}
LOG_DEBUG(Common_Filesystem,
"Successfully opened the file at path={} with mode={}, type={}, flag={}",
PathToUTF8String(path), mode, type, flag);
return io_file;
}
// Directory Operations
bool CreateDir(const fs::path& path) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return false;
}
if (!Exists(path.parent_path())) {
LOG_ERROR(Common_Filesystem, "Parent directory of path={} does not exist",
PathToUTF8String(path));
return false;
}
if (IsDir(path)) {
LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} exists and is a directory",
PathToUTF8String(path));
return true;
}
std::error_code ec;
fs::create_directory(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem, "Failed to create the directory at path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return false;
}
LOG_DEBUG(Common_Filesystem, "Successfully created the directory at path={}",
PathToUTF8String(path));
return true;
}
bool CreateDirs(const fs::path& path) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return false;
}
if (IsDir(path)) {
LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} exists and is a directory",
PathToUTF8String(path));
return true;
}
std::error_code ec;
fs::create_directories(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem, "Failed to create the directories at path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return false;
}
LOG_DEBUG(Common_Filesystem, "Successfully created the directories at path={}",
PathToUTF8String(path));
return true;
}
bool CreateParentDir(const fs::path& path) {
return CreateDir(path.parent_path());
}
bool CreateParentDirs(const fs::path& path) {
return CreateDirs(path.parent_path());
}
bool RemoveDir(const fs::path& path) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return false;
}
if (!Exists(path)) {
LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} does not exist",
PathToUTF8String(path));
return true;
}
if (!IsDir(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory",
PathToUTF8String(path));
return false;
}
std::error_code ec;
fs::remove(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem, "Failed to remove the directory at path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return false;
}
LOG_DEBUG(Common_Filesystem, "Successfully removed the directory at path={}",
PathToUTF8String(path));
return true;
}
bool RemoveDirRecursively(const fs::path& path) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return false;
}
if (!Exists(path)) {
LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} does not exist",
PathToUTF8String(path));
return true;
}
if (!IsDir(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory",
PathToUTF8String(path));
return false;
}
std::error_code ec;
fs::remove_all(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem,
"Failed to remove the directory and its contents at path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return false;
}
LOG_DEBUG(Common_Filesystem, "Successfully removed the directory and its contents at path={}",
PathToUTF8String(path));
return true;
}
bool RemoveDirContentsRecursively(const fs::path& path) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return false;
}
if (!Exists(path)) {
LOG_DEBUG(Common_Filesystem, "Filesystem object at path={} does not exist",
PathToUTF8String(path));
return true;
}
if (!IsDir(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory",
PathToUTF8String(path));
return false;
}
std::error_code ec;
// TODO (Morph): Replace this with recursive_directory_iterator once it's fixed in MSVC.
for (const auto& entry : fs::directory_iterator(path, ec)) {
if (ec) {
LOG_ERROR(Common_Filesystem,
"Failed to completely enumerate the directory at path={}, ec_message={}",
PathToUTF8String(path), ec.message());
break;
}
fs::remove(entry.path(), ec);
if (ec) {
LOG_ERROR(Common_Filesystem,
"Failed to remove the filesystem object at path={}, ec_message={}",
PathToUTF8String(entry.path()), ec.message());
break;
}
// TODO (Morph): Remove this when MSVC fixes recursive_directory_iterator.
// recursive_directory_iterator throws an exception despite passing in a std::error_code.
if (entry.status().type() == fs::file_type::directory) {
return RemoveDirContentsRecursively(entry.path());
}
}
if (ec) {
LOG_ERROR(Common_Filesystem,
"Failed to remove all the contents of the directory at path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return false;
}
LOG_DEBUG(Common_Filesystem,
"Successfully removed all the contents of the directory at path={}",
PathToUTF8String(path));
return true;
}
bool RenameDir(const fs::path& old_path, const fs::path& new_path) {
if (!ValidatePath(old_path) || !ValidatePath(new_path)) {
LOG_ERROR(Common_Filesystem,
"One or both input path(s) is not valid, old_path={}, new_path={}",
PathToUTF8String(old_path), PathToUTF8String(new_path));
return false;
}
if (!Exists(old_path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at old_path={} does not exist",
PathToUTF8String(old_path));
return false;
}
if (!IsDir(old_path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at old_path={} is not a directory",
PathToUTF8String(old_path));
return false;
}
if (Exists(new_path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at new_path={} exists",
PathToUTF8String(new_path));
return false;
}
std::error_code ec;
fs::rename(old_path, new_path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem,
"Failed to rename the file from old_path={} to new_path={}, ec_message={}",
PathToUTF8String(old_path), PathToUTF8String(new_path), ec.message());
return false;
}
LOG_DEBUG(Common_Filesystem, "Successfully renamed the file from old_path={} to new_path={}",
PathToUTF8String(old_path), PathToUTF8String(new_path));
return true;
}
void IterateDirEntries(const std::filesystem::path& path, const DirEntryCallable& callback,
DirEntryFilter filter) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return;
}
if (!Exists(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} does not exist",
PathToUTF8String(path));
return;
}
if (!IsDir(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory",
PathToUTF8String(path));
return;
}
bool callback_error = false;
std::error_code ec;
for (const auto& entry : fs::directory_iterator(path, ec)) {
if (ec) {
break;
}
if (True(filter & DirEntryFilter::File) &&
entry.status().type() == fs::file_type::regular) {
if (!callback(entry.path())) {
callback_error = true;
break;
}
}
if (True(filter & DirEntryFilter::Directory) &&
entry.status().type() == fs::file_type::directory) {
if (!callback(entry.path())) {
callback_error = true;
break;
}
}
}
if (callback_error || ec) {
LOG_ERROR(Common_Filesystem,
"Failed to visit all the directory entries of path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return;
}
LOG_DEBUG(Common_Filesystem, "Successfully visited all the directory entries of path={}",
PathToUTF8String(path));
}
void IterateDirEntriesRecursively(const std::filesystem::path& path,
const DirEntryCallable& callback, DirEntryFilter filter) {
if (!ValidatePath(path)) {
LOG_ERROR(Common_Filesystem, "Input path is not valid, path={}", PathToUTF8String(path));
return;
}
if (!Exists(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} does not exist",
PathToUTF8String(path));
return;
}
if (!IsDir(path)) {
LOG_ERROR(Common_Filesystem, "Filesystem object at path={} is not a directory",
PathToUTF8String(path));
return;
}
bool callback_error = false;
std::error_code ec;
// TODO (Morph): Replace this with recursive_directory_iterator once it's fixed in MSVC.
for (const auto& entry : fs::directory_iterator(path, ec)) {
if (ec) {
break;
}
if (True(filter & DirEntryFilter::File) &&
entry.status().type() == fs::file_type::regular) {
if (!callback(entry.path())) {
callback_error = true;
break;
}
}
if (True(filter & DirEntryFilter::Directory) &&
entry.status().type() == fs::file_type::directory) {
if (!callback(entry.path())) {
callback_error = true;
break;
}
}
// TODO (Morph): Remove this when MSVC fixes recursive_directory_iterator.
// recursive_directory_iterator throws an exception despite passing in a std::error_code.
if (entry.status().type() == fs::file_type::directory) {
IterateDirEntriesRecursively(entry.path(), callback, filter);
}
}
if (callback_error || ec) {
LOG_ERROR(Common_Filesystem,
"Failed to visit all the directory entries of path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return;
}
LOG_DEBUG(Common_Filesystem, "Successfully visited all the directory entries of path={}",
PathToUTF8String(path));
}
// Generic Filesystem Operations
bool Exists(const fs::path& path) {
return fs::exists(path);
}
bool IsFile(const fs::path& path) {
return fs::is_regular_file(path);
}
bool IsDir(const fs::path& path) {
return fs::is_directory(path);
}
fs::path GetCurrentDir() {
std::error_code ec;
const auto current_path = fs::current_path(ec);
if (ec) {
LOG_ERROR(Common_Filesystem, "Failed to get the current path, ec_message={}", ec.message());
return {};
}
return current_path;
}
bool SetCurrentDir(const fs::path& path) {
std::error_code ec;
fs::current_path(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem, "Failed to set the current path to path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return false;
}
return true;
}
fs::file_type GetEntryType(const fs::path& path) {
std::error_code ec;
const auto file_status = fs::status(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem, "Failed to retrieve the entry type of path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return fs::file_type::not_found;
}
return file_status.type();
}
u64 GetSize(const fs::path& path) {
std::error_code ec;
const auto file_size = fs::file_size(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem, "Failed to retrieve the file size of path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return 0;
}
return file_size;
}
u64 GetFreeSpaceSize(const fs::path& path) {
std::error_code ec;
const auto space_info = fs::space(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem,
"Failed to retrieve the available free space of path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return 0;
}
return space_info.free;
}
u64 GetTotalSpaceSize(const fs::path& path) {
std::error_code ec;
const auto space_info = fs::space(path, ec);
if (ec) {
LOG_ERROR(Common_Filesystem,
"Failed to retrieve the total capacity of path={}, ec_message={}",
PathToUTF8String(path), ec.message());
return 0;
}
return space_info.capacity;
}
} // namespace Common::FS
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