ppsspp/Core/FileSystems/MetaFileSystem.cpp
sum2012 ba88be9172 Fix disc0:/ vs. disc0: in path parsing
Fix Hot Pixel loading
2014-03-23 11:04:06 +08:00

609 lines
15 KiB
C++

// Copyright (c) 2012- PPSSPP Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#include <algorithm>
#include <set>
#include "Common/ChunkFile.h"
#include "Common/StringUtils.h"
#include "Core/FileSystems/MetaFileSystem.h"
#include "Core/HLE/sceKernelThread.h"
#include "Core/Reporting.h"
static bool ApplyPathStringToComponentsVector(std::vector<std::string> &vector, const std::string &pathString)
{
size_t len = pathString.length();
size_t start = 0;
while (start < len)
{
// TODO: This should only be done for ms0:/ etc.
size_t i = pathString.find_first_of("/\\", start);
if (i == std::string::npos)
i = len;
if (i > start)
{
std::string component = pathString.substr(start, i - start);
if (component != ".")
{
if (component == "..")
{
if (vector.size() != 0)
{
vector.pop_back();
}
else
{
// The PSP silently ignores attempts to .. to parent of root directory
WARN_LOG(FILESYS, "RealPath: ignoring .. beyond root - root directory is its own parent: \"%s\"", pathString.c_str());
}
}
else
{
vector.push_back(component);
}
}
}
start = i + 1;
}
return true;
}
/*
* Changes relative paths to absolute, removes ".", "..", and trailing "/"
* "drive:./blah" is absolute (ignore the dot) and "/blah" is relative (because it's missing "drive:")
* babel (and possibly other games) use "/directoryThatDoesNotExist/../directoryThatExists/filename"
*/
static bool RealPath(const std::string &currentDirectory, const std::string &inPath, std::string &outPath)
{
size_t inLen = inPath.length();
if (inLen == 0)
{
WARN_LOG(FILESYS, "RealPath: inPath is empty");
outPath = currentDirectory;
return true;
}
size_t inColon = inPath.find(':');
if (inColon + 1 == inLen)
{
// There's nothing after the colon, e.g. umd0: - this is perfectly valid.
outPath = inPath;
return true;
}
bool relative = (inColon == std::string::npos);
std::string prefix, inAfterColon;
std::vector<std::string> cmpnts; // path components
size_t outPathCapacityGuess = inPath.length();
if (relative)
{
size_t curDirLen = currentDirectory.length();
if (curDirLen == 0)
{
ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory is empty", inPath.c_str());
return false;
}
size_t curDirColon = currentDirectory.find(':');
if (curDirColon == std::string::npos)
{
ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory \"%s\" has no prefix", inPath.c_str(), currentDirectory.c_str());
return false;
}
if (curDirColon + 1 == curDirLen)
{
ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory \"%s\" is all prefix and no path. Using \"/\" as path for current directory.", inPath.c_str(), currentDirectory.c_str());
}
else
{
const std::string curDirAfter = currentDirectory.substr(curDirColon + 1);
if (! ApplyPathStringToComponentsVector(cmpnts, curDirAfter) )
{
ERROR_LOG(FILESYS,"RealPath: currentDirectory is not a valid path: \"%s\"", currentDirectory.c_str());
return false;
}
outPathCapacityGuess += curDirLen;
}
prefix = currentDirectory.substr(0, curDirColon + 1);
inAfterColon = inPath;
}
else
{
prefix = inPath.substr(0, inColon + 1);
inAfterColon = inPath.substr(inColon + 1);
}
// Special case: "disc0:" is different from "disc0:/", so keep track of the single slash.
if (inAfterColon == "/")
{
outPath = prefix + inAfterColon;
}
if (! ApplyPathStringToComponentsVector(cmpnts, inAfterColon) )
{
WARN_LOG(FILESYS, "RealPath: inPath is not a valid path: \"%s\"", inPath.c_str());
return false;
}
outPath.clear();
outPath.reserve(outPathCapacityGuess);
outPath.append(prefix);
size_t numCmpnts = cmpnts.size();
for (size_t i = 0; i < numCmpnts; i++)
{
outPath.append(1, '/');
outPath.append(cmpnts[i]);
}
return true;
}
IFileSystem *MetaFileSystem::GetHandleOwner(u32 handle)
{
lock_guard guard(lock);
for (size_t i = 0; i < fileSystems.size(); i++)
{
if (fileSystems[i].system->OwnsHandle(handle))
return fileSystems[i].system; //got it!
}
//none found?
return 0;
}
bool MetaFileSystem::MapFilePath(const std::string &_inpath, std::string &outpath, MountPoint **system)
{
lock_guard guard(lock);
std::string realpath;
std::string inpath = _inpath;
// "ms0:/file.txt" is equivalent to " ms0:/file.txt". Yes, really.
if (inpath.find(':') != inpath.npos) {
size_t offset = 0;
while (inpath[offset] == ' ') {
offset++;
}
if (offset > 0) {
inpath = inpath.substr(offset);
}
}
// Special handling: host0:command.txt (as seen in Super Monkey Ball Adventures, for example)
// appears to mean the current directory on the UMD. Let's just assume the current directory.
if (strncasecmp(inpath.c_str(), "host0:", strlen("host0:")) == 0) {
INFO_LOG(FILESYS, "Host0 path detected, stripping: %s", inpath.c_str());
inpath = inpath.substr(strlen("host0:"));
}
const std::string *currentDirectory = &startingDirectory;
int currentThread = __KernelGetCurThread();
currentDir_t::iterator it = currentDir.find(currentThread);
if (it == currentDir.end())
{
//Attempt to emulate SCE_KERNEL_ERROR_NOCWD / 8002032C: may break things requiring fixes elsewhere
if (inpath.find(':') == std::string::npos /* means path is relative */)
{
lastOpenError = SCE_KERNEL_ERROR_NOCWD;
WARN_LOG(FILESYS, "Path is relative, but current directory not set for thread %i. returning 8002032C(SCE_KERNEL_ERROR_NOCWD) instead.", currentThread);
}
}
else
{
currentDirectory = &(it->second);
}
if ( RealPath(*currentDirectory, inpath, realpath) )
{
std::string prefix = realpath;
size_t prefixPos = realpath.find(':');
if (prefixPos != realpath.npos)
prefix = NormalizePrefix(realpath.substr(0, prefixPos + 1));
for (size_t i = 0; i < fileSystems.size(); i++)
{
size_t prefLen = fileSystems[i].prefix.size();
if (strncasecmp(fileSystems[i].prefix.c_str(), prefix.c_str(), prefLen) == 0)
{
outpath = realpath.substr(prefixPos + 1);
*system = &(fileSystems[i]);
VERBOSE_LOG(FILESYS, "MapFilePath: mapped \"%s\" to prefix: \"%s\", path: \"%s\"", inpath.c_str(), fileSystems[i].prefix.c_str(), outpath.c_str());
return true;
}
}
}
DEBUG_LOG(FILESYS, "MapFilePath: failed mapping \"%s\", returning false", inpath.c_str());
return false;
}
std::string MetaFileSystem::NormalizePrefix(std::string prefix) const {
// Let's apply some mapping here since it won't break savestates.
if (prefix == "memstick:")
prefix = "ms0:";
// Seems like umd00: etc. work just fine...
if (startsWith(prefix, "umd"))
prefix = "umd0:";
// Seems like umd00: etc. work just fine...
if (startsWith(prefix, "host"))
prefix = "host0:";
return prefix;
}
void MetaFileSystem::Mount(std::string prefix, IFileSystem *system)
{
lock_guard guard(lock);
MountPoint x;
x.prefix = prefix;
x.system = system;
fileSystems.push_back(x);
}
void MetaFileSystem::Unmount(std::string prefix, IFileSystem *system)
{
lock_guard guard(lock);
MountPoint x;
x.prefix = prefix;
x.system = system;
fileSystems.erase(std::remove(fileSystems.begin(), fileSystems.end(), x), fileSystems.end());
}
void MetaFileSystem::Remount(IFileSystem *oldSystem, IFileSystem *newSystem) {
for (auto it = fileSystems.begin(); it != fileSystems.end(); ++it) {
if (it->system == oldSystem) {
it->system = newSystem;
}
}
}
IFileSystem *MetaFileSystem::GetSystem(const std::string &prefix) {
for (auto it = fileSystems.begin(); it != fileSystems.end(); ++it) {
if (it->prefix == NormalizePrefix(prefix))
return it->system;
}
return NULL;
}
void MetaFileSystem::Shutdown()
{
lock_guard guard(lock);
current = 6;
// Ownership is a bit convoluted. Let's just delete everything once.
std::set<IFileSystem *> toDelete;
for (size_t i = 0; i < fileSystems.size(); i++) {
toDelete.insert(fileSystems[i].system);
}
for (auto iter = toDelete.begin(); iter != toDelete.end(); ++iter)
{
delete *iter;
}
fileSystems.clear();
currentDir.clear();
startingDirectory = "";
}
u32 MetaFileSystem::OpenWithError(int &error, std::string filename, FileAccess access, const char *devicename)
{
lock_guard guard(lock);
u32 h = OpenFile(filename, access, devicename);
error = lastOpenError;
return h;
}
u32 MetaFileSystem::OpenFile(std::string filename, FileAccess access, const char *devicename)
{
lock_guard guard(lock);
lastOpenError = 0;
std::string of;
MountPoint *mount;
if (MapFilePath(filename, of, &mount))
{
return mount->system->OpenFile(of, access, mount->prefix.c_str());
}
else
{
return 0;
}
}
PSPFileInfo MetaFileSystem::GetFileInfo(std::string filename)
{
lock_guard guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(filename, of, &system))
{
return system->GetFileInfo(of);
}
else
{
PSPFileInfo bogus; // TODO
return bogus;
}
}
bool MetaFileSystem::GetHostPath(const std::string &inpath, std::string &outpath)
{
lock_guard guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(inpath, of, &system)) {
return system->GetHostPath(of, outpath);
} else {
return false;
}
}
std::vector<PSPFileInfo> MetaFileSystem::GetDirListing(std::string path)
{
lock_guard guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(path, of, &system))
{
return system->GetDirListing(of);
}
else
{
std::vector<PSPFileInfo> empty;
return empty;
}
}
void MetaFileSystem::ThreadEnded(int threadID)
{
lock_guard guard(lock);
currentDir.erase(threadID);
}
int MetaFileSystem::ChDir(const std::string &dir)
{
lock_guard guard(lock);
// Retain the old path and fail if the arg is 1023 bytes or longer.
if (dir.size() >= 1023)
return SCE_KERNEL_ERROR_NAMETOOLONG;
int curThread = __KernelGetCurThread();
std::string of;
MountPoint *mountPoint;
if (MapFilePath(dir, of, &mountPoint))
{
currentDir[curThread] = mountPoint->prefix + of;
return 0;
}
else
{
for (size_t i = 0; i < fileSystems.size(); i++)
{
const std::string &prefix = fileSystems[i].prefix;
if (strncasecmp(prefix.c_str(), dir.c_str(), prefix.size()) == 0)
{
// The PSP is completely happy with invalid current dirs as long as they have a valid device.
WARN_LOG(FILESYS, "ChDir failed to map path \"%s\", saving as current directory anyway", dir.c_str());
currentDir[curThread] = dir;
return 0;
}
}
WARN_LOG_REPORT(FILESYS, "ChDir failed to map device for \"%s\", failing", dir.c_str());
return SCE_KERNEL_ERROR_NODEV;
}
}
bool MetaFileSystem::MkDir(const std::string &dirname)
{
lock_guard guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(dirname, of, &system))
{
return system->MkDir(of);
}
else
{
return false;
}
}
bool MetaFileSystem::RmDir(const std::string &dirname)
{
lock_guard guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(dirname, of, &system))
{
return system->RmDir(of);
}
else
{
return false;
}
}
int MetaFileSystem::RenameFile(const std::string &from, const std::string &to)
{
lock_guard guard(lock);
std::string of;
std::string rf;
IFileSystem *osystem;
IFileSystem *rsystem = NULL;
if (MapFilePath(from, of, &osystem))
{
// If it's a relative path, it seems to always use from's filesystem.
if (to.find(":/") != to.npos)
{
if (!MapFilePath(to, rf, &rsystem))
return -1;
}
else
{
rf = to;
rsystem = osystem;
}
if (osystem != rsystem)
return SCE_KERNEL_ERROR_XDEV;
return osystem->RenameFile(of, rf);
}
else
{
return -1;
}
}
bool MetaFileSystem::RemoveFile(const std::string &filename)
{
lock_guard guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(filename, of, &system))
{
return system->RemoveFile(of);
}
else
{
return false;
}
}
int MetaFileSystem::Ioctl(u32 handle, u32 cmd, u32 indataPtr, u32 inlen, u32 outdataPtr, u32 outlen, int &usec)
{
lock_guard guard(lock);
IFileSystem *sys = GetHandleOwner(handle);
if (sys)
return sys->Ioctl(handle, cmd, indataPtr, inlen, outdataPtr, outlen, usec);
return SCE_KERNEL_ERROR_ERROR;
}
int MetaFileSystem::DevType(u32 handle)
{
lock_guard guard(lock);
IFileSystem *sys = GetHandleOwner(handle);
if (sys)
return sys->DevType(handle);
return SCE_KERNEL_ERROR_ERROR;
}
void MetaFileSystem::CloseFile(u32 handle)
{
lock_guard guard(lock);
IFileSystem *sys = GetHandleOwner(handle);
if (sys)
sys->CloseFile(handle);
}
size_t MetaFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size)
{
lock_guard guard(lock);
IFileSystem *sys = GetHandleOwner(handle);
if (sys)
return sys->ReadFile(handle,pointer,size);
else
return 0;
}
size_t MetaFileSystem::WriteFile(u32 handle, const u8 *pointer, s64 size)
{
lock_guard guard(lock);
IFileSystem *sys = GetHandleOwner(handle);
if (sys)
return sys->WriteFile(handle,pointer,size);
else
return 0;
}
size_t MetaFileSystem::SeekFile(u32 handle, s32 position, FileMove type)
{
lock_guard guard(lock);
IFileSystem *sys = GetHandleOwner(handle);
if (sys)
return sys->SeekFile(handle,position,type);
else
return 0;
}
int MetaFileSystem::ReadEntireFile(const std::string &filename, std::vector<u8> &data) {
int error = 0;
u32 handle = OpenWithError(error, filename, FILEACCESS_READ);
if (handle == 0)
return error;
size_t dataSize = (size_t)GetFileInfo(filename).size;
data.resize(dataSize);
size_t result = ReadFile(handle, (u8 *)&data[0], dataSize);
CloseFile(handle);
if (result != dataSize)
return SCE_KERNEL_ERROR_ERROR;
return 0;
}
void MetaFileSystem::DoState(PointerWrap &p)
{
lock_guard guard(lock);
auto s = p.Section("MetaFileSystem", 1);
if (!s)
return;
p.Do(current);
// Save/load per-thread current directory map
p.Do(currentDir);
u32 n = (u32) fileSystems.size();
p.Do(n);
bool skipPfat0 = false;
if (n != (u32) fileSystems.size())
{
if (n == (u32) fileSystems.size() - 1) {
skipPfat0 = true;
} else {
p.SetError(p.ERROR_FAILURE);
ERROR_LOG(FILESYS, "Savestate failure: number of filesystems doesn't match.");
return;
}
}
for (u32 i = 0; i < n; ++i) {
if (!skipPfat0 || fileSystems[i].prefix != "pfat0:") {
fileSystems[i].system->DoState(p);
}
}
}