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Merge pull request #7603 from jordan-woyak/fs-open-file-fix

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Present an error message when failing to open a file that should exist.
This commit is contained in:
Pierre Bourdon 2018-12-04 08:49:21 +01:00 committed by GitHub
commit 2c57e709d0
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1 changed files with 40 additions and 16 deletions
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56
Source/Core/Core/IOS/FS/HostBackend/File.cpp
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@ -8,6 +8,8 @@
#include "Common/File.h"
#include "Common/FileUtil.h"
#include "Common/Logging/Log.h"
#include "Common/MsgHandler.h"
#include "Core/IOS/FS/HostBackend/FS.h"
namespace IOS::HLE::FS
@ -32,29 +34,45 @@ std::shared_ptr<File::IOFile> HostFileSystem::OpenHostFile(const std::string& ho
// - The Beatles: Rock Band (saving doesn't work)
// Check if the file has already been opened.
std::shared_ptr<File::IOFile> file;
auto search = m_open_files.find(host_path);
if (search != m_open_files.end())
{
file = search->second.lock(); // Lock a shared pointer to use.
// Lock a shared pointer to use.
return search->second.lock();
}
else
// All files are opened read/write. Actual access rights will be controlled per handle by the
// read/write functions below
File::IOFile file;
while (!file.Open(host_path, "r+b"))
{
// This code will be called when all references to the shared pointer below have been removed.
auto deleter = [this, host_path](File::IOFile* ptr) {
delete ptr; // IOFile's deconstructor closes the file.
m_open_files.erase(host_path); // erase the weak pointer from the list of open files.
};
const bool try_again =
PanicYesNo("File \"%s\" could not be opened!\n"
"This may happen with improper permissions or use by another process.\n"
"Press \"Yes\" to make another attempt.",
host_path.c_str());
// All files are opened read/write. Actual access rights will be controlled per handle by the
// read/write functions below
file = std::shared_ptr<File::IOFile>(new File::IOFile(host_path, "r+b"),
deleter); // Use the custom deleter from above.
// Store a weak pointer to our newly opened file in the cache.
m_open_files[host_path] = std::weak_ptr<File::IOFile>(file);
if (!try_again)
{
// We've failed to open the file:
ERROR_LOG(IOS_FS, "OpenHostFile %s", host_path.c_str());
return nullptr;
}
}
return file;
// This code will be called when all references to the shared pointer below have been removed.
auto deleter = [this, host_path](File::IOFile* ptr) {
delete ptr; // IOFile's deconstructor closes the file.
m_open_files.erase(host_path); // erase the weak pointer from the list of open files.
};
// Use the custom deleter from above.
std::shared_ptr<File::IOFile> file_ptr(new File::IOFile(std::move(file)), deleter);
// Store a weak pointer to our newly opened file in the cache.
m_open_files[host_path] = std::weak_ptr<File::IOFile>(file_ptr);
return file_ptr;
}
Result<FileHandle> HostFileSystem::OpenFile(Uid, Gid, const std::string& path, Mode mode)
@ -71,6 +89,12 @@ Result<FileHandle> HostFileSystem::OpenFile(Uid, Gid, const std::string& path, M
}
handle->host_file = OpenHostFile(host_path);
if (!handle->host_file)
{
*handle = Handle{};
return ResultCode::AccessDenied;
}
handle->wii_path = path;
handle->mode = mode;
handle->file_offset = 0;