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Check if file exists before calling platform-specific code

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Bloodborne checks if a file doesn't exist using open, checking if it specifically failed with error code ENOENT. To avoid working with platform-specific errnos, add a proper error return for if the file doesn't exist.
Fixes a regression in Bloodborne.
This commit is contained in:
Stephen Miller 2025-02-20 17:57:31 -06:00
parent b52b6ae04b
commit 6c2329eadf
1 changed files with 9 additions and 1 deletions
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10
src/core/libraries/kernel/file_system.cpp
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@ -118,10 +118,11 @@ s32 PS4_SYSV_ABI open(const char* raw_path, s32 flags, u16 mode) {
} else {
file->m_guest_name = path;
file->m_host_name = mnt->GetHostPath(file->m_guest_name);
bool exists = std::filesystem::exists(file->m_host_name);
int e = 0;
if (create) {
if (excl && std::filesystem::exists(file->m_host_name)) {
if (excl && exists) {
// Error if file exists
h->DeleteHandle(handle);
*__Error() = POSIX_EEXIST;
@ -131,6 +132,13 @@ s32 PS4_SYSV_ABI open(const char* raw_path, s32 flags, u16 mode) {
Common::FS::IOFile out(file->m_host_name, Common::FS::FileAccessMode::Write);
}
if (!exists) {
// File to open doesn't exist, return ENOENT
h->DeleteHandle(handle);
*__Error() = POSIX_ENOENT;
return -1;
}
if (read) {
// Read only
e = file->f.Open(file->m_host_name, Common::FS::FileAccessMode::Read);