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Improve vfs::host::unlink on Windows (for sys_fs_rmdir)

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Possibly fixes sys_fs_rmdir and other cases of directory removal.
Make sure the directory with deleted files always becomes empty.
For this purpose, temp files are moved to the root of the device.
This commit is contained in:
Nekotekina 2019-09-25 04:57:56 +03:00
parent cd843bda6e
commit ccf9543b44
3 changed files with 12 additions and 5 deletions
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9
rpcs3/Emu/Cell/lv2/sys_fs.cpp
View file

@ -862,7 +862,9 @@ error_code sys_fs_unlink(ppu_thread& ppu, vm::cptr<char> path)
const std::string_view vpath = path.get_ptr();
const std::string local_path = vfs::get(vpath);
if (vpath.find_first_not_of('/') == -1)
const std::size_t dev_start = vpath.find_first_not_of('/');
if (dev_start == -1)
{
return {CELL_EISDIR, path};
}
@ -877,7 +879,10 @@ error_code sys_fs_unlink(ppu_thread& ppu, vm::cptr<char> path)
return {CELL_EISDIR, path};
}
if (!vfs::host::unlink(local_path))
// Size of "/dev_hdd0"-alike substring
const std::size_t dev_size = vpath.find_first_of('/', dev_start);
if (!vfs::host::unlink(local_path, vfs::get(vpath.substr(0, dev_size))))
{
switch (auto error = fs::g_tls_error)
{

6
rpcs3/Emu/VFS.cpp
View file

@ -33,6 +33,8 @@ bool vfs::mount(std::string_view vpath, std::string_view path)
const auto table = g_fxo->get<vfs_manager>();
// TODO: scan roots of mounted devices for undeleted vfs::host::unlink remnants, and try to delete them (_WIN32 only)
std::lock_guard lock(table->mutex);
if (vpath.empty())
@ -566,13 +568,13 @@ bool vfs::host::rename(const std::string& from, const std::string& to, bool over
return true;
}
bool vfs::host::unlink(const std::string& path)
bool vfs::host::unlink(const std::string& path, const std::string& dev_root)
{
#ifdef _WIN32
if (path.size() < 2 || reinterpret_cast<const u16&>(path.front()) != "//"_u16)
{
// Rename to special dummy name which will be ignored by VFS (but opened file handles can still read or write it)
const std::string dummy = fmt::format(u8"%s/＄%s%s", fs::get_parent_dir(path), fmt::base57(std::hash<std::string>()(path)), fmt::base57(__rdtsc()));
const std::string dummy = fmt::format(u8"%s/＄%s%s", dev_root, fmt::base57(std::hash<std::string>()(path)), fmt::base57(__rdtsc()));
if (!fs::rename(path, dummy, true))
{

2
rpcs3/Emu/VFS.h
View file

@ -25,6 +25,6 @@ namespace vfs
bool rename(const std::string& from, const std::string& to, bool overwrite);
// Delete file without deleting its contents, emulated with MoveFileEx on Windows
bool unlink(const std::string&);
bool unlink(const std::string& path, const std::string& dev_root);
}
}