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IOS/FS: Fix FST write failure on some platforms 

On some platforms (like Windows), the temporary file must be closed
before it can be renamed.

I guess nobody noticed this for so long because (1) the FS code has a
failsafe for missing FST entries (because existing users do not have
a FST), and most games do not care about file metadata;
(2) the write failures can only be seen in the logs.

Because we don't want this to break, I have turned the ERROR_LOGs into
PanicAlerts.
This commit is contained in:
Léo Lam 2020-04-18 11:40:27 +02:00
parent 21e3e14d8a
commit b2cf106ae9
1 changed files with 11 additions and 3 deletions
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12
Source/Core/Core/IOS/FS/HostBackend/FS.cpp
View File

@ -177,9 +177,17 @@ void HostFileSystem::SaveFst()
const std::string dest_path = GetFstFilePath();
const std::string temp_path = File::GetTempFilenameForAtomicWrite(dest_path);
{
// This temporary file must be closed before it can be renamed.
File::IOFile file{temp_path, "wb"};
if (!file.WriteArray(to_write.data(), to_write.size()) || !File::Rename(temp_path, dest_path))
ERROR_LOG(IOS_FS, "Failed to write new FST");
if (!file.WriteArray(to_write.data(), to_write.size()))
{
PanicAlert("IOS_FS: Failed to write new FST");
return;
}
}
if (!File::Rename(temp_path, dest_path))
PanicAlert("IOS_FS: Failed to rename temporary FST file");
}
HostFileSystem::FstEntry* HostFileSystem::GetFstEntryForPath(const std::string& path)