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ReycleManger.dll: Rewrote bin change detection code to fix various issues
This commit is contained in:
Birunthan Mohanathas
parent
49d9b84514
commit
4172dffd73
@ -18,12 +18,10 @@
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#define WIN32_LEAN_AND_MEAN
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#include <Windows.h>
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#include <Sddl.h>
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#include <ShellAPI.h>
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#include <ShlObj.h>
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#include <process.h>
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#include <vector>
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#include "../../Library/RawString.h"
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#include <cstdio>
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#include <cstdlib>
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#include "../../Library/Export.h" // Rainmeter's exported functions
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struct MeasureData
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@ -33,30 +31,12 @@ struct MeasureData
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MeasureData() : count(false) {}
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};
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struct BinData
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{
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union
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{
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ULONGLONG lastWrite;
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UINT lastCount;
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};
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CRawString directory;
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WCHAR drive;
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bool isFAT;
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};
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DWORD WINAPI QueryRecycleBinThreadProc(void* pParam);
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HRESULT GetFolderCLSID(LPCWSTR pszPath, CLSID* pathCLSID);
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LPWSTR GetCurrentUserSid();
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CRawString GetRecycleBinDirectory(WCHAR drive, bool& isFAT);
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bool HasRecycleBinChanged();
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std::vector<BinData> g_BinData;
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double g_BinCount = 0;
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double g_BinSize = 0;
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bool g_IsXP = false;
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int g_UpdateCount = 0;
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int g_InstanceCount = 0;
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bool g_Thread = false;
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@ -87,19 +67,6 @@ PLUGIN_EXPORT void Initialize(void** data, void* rm)
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MeasureData* measure = new MeasureData;
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*data = measure;
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if (g_InstanceCount == 0)
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{
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OSVERSIONINFOEX osvi = {sizeof(OSVERSIONINFOEX)};
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if (GetVersionEx((OSVERSIONINFO*)&osvi))
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{
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if (osvi.dwMajorVersion == 5)
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{
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// Not checking for osvi.dwMinorVersion >= 1 because we won't run on pre-XP
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g_IsXP = true;
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}
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}
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}
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++g_InstanceCount;
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}
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@ -128,126 +95,17 @@ PLUGIN_EXPORT double Update(void* data)
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{
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MeasureData* measure = (MeasureData*)data;
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if (TryEnterCriticalSection(&g_CriticalSection))
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{
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if (!g_Thread)
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{
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++g_UpdateCount;
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if (g_UpdateCount > g_InstanceCount &&
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TryEnterCriticalSection(&g_CriticalSection))
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if (g_UpdateCount > g_InstanceCount)
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{
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g_UpdateCount = 0;
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WCHAR buffer[128];
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DWORD len = GetLogicalDriveStrings(128, buffer);
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// Convert "A:\\\0B:\\\0" -> "AB\0"
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int index = 0;
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for (int i = 0; i < len; i += 4)
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if (HasRecycleBinChanged())
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{
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buffer[index] = buffer[i];
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++index;
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}
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buffer[index] = L'\0';
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const WCHAR DRIVE_HANDLED = 1;
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bool changed = false;
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auto iter = g_BinData.begin();
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while (iter != g_BinData.end())
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{
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BinData& data = (*iter);
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WCHAR* pos = wcschr(buffer, data.drive);
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if (pos != NULL)
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{
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if (data.isFAT)
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{
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// FAT/FAT32 doesn't update directory last write time.
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// Use directory content count instead.
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WCHAR filter[] = L"\0:\\$RECYCLE.BIN\\*";
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WCHAR filterXP[] = L"\0:\\RECYCLED\\*";
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filter[0] = *pos;
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filterXP[0] = *pos;
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WIN32_FIND_DATA fd;
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HANDLE hSearch = FindFirstFile(g_IsXP ? filterXP : filter, &fd);
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if (hSearch != INVALID_HANDLE_VALUE)
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{
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UINT count = 0;
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do
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{
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++count;
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}
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while (FindNextFile(hSearch, &fd));
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FindClose(hSearch);
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if (count != data.lastCount)
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{
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data.lastCount = count;
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changed = true;
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}
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}
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}
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else if (!data.directory.empty())
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{
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// Prevent the system from displaying message box.
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UINT oldMode = SetErrorMode(0);
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SetErrorMode(oldMode | SEM_FAILCRITICALERRORS);
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HANDLE bin = CreateFile(
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data.directory.c_str(),
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GENERIC_READ,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL,
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OPEN_EXISTING,
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FILE_FLAG_BACKUP_SEMANTICS,
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NULL);
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if (bin)
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{
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ULONGLONG lastWrite;
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GetFileTime(bin, NULL, NULL, (FILETIME*)&lastWrite);
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if (data.lastWrite != lastWrite)
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{
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data.lastWrite = lastWrite;
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changed = true;
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}
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CloseHandle(bin);
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}
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SetErrorMode(oldMode);
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}
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*pos = DRIVE_HANDLED;
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++iter;
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}
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else
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{
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// Drive removed
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changed = true;
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iter = g_BinData.erase(iter);
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}
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}
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for (int i = 0; i < index; ++i)
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{
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if (buffer[i] != DRIVE_HANDLED)
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{
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// New drive
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g_BinData.push_back(BinData());
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BinData& data = g_BinData.back();
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data.drive = buffer[i];
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WCHAR drive[] = L"\0:\\";
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drive[0] = buffer[i];
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if (GetDriveType(drive) == DRIVE_FIXED)
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{
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data.directory = GetRecycleBinDirectory(buffer[i], data.isFAT);
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}
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}
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}
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if (changed && !g_Thread)
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{
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g_UpdateCount = -8;
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// Delay next check.
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g_UpdateCount = g_InstanceCount * -2;
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DWORD id;
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HANDLE thread = CreateThread(NULL, 0, QueryRecycleBinThreadProc, NULL, 0, &id);
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@ -257,6 +115,12 @@ PLUGIN_EXPORT double Update(void* data)
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g_Thread = true;
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}
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}
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else
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{
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g_UpdateCount = 0;
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}
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}
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}
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LeaveCriticalSection(&g_CriticalSection);
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}
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@ -336,140 +200,80 @@ DWORD WINAPI QueryRecycleBinThreadProc(void* pParam)
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return 0;
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}
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HRESULT GetFolderCLSID(LPCWSTR path, CLSID* clsid)
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bool HasRecycleBinChanged()
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{
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LPITEMIDLIST pidl;
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HRESULT hr = SHParseDisplayName(path, NULL, &pidl, 0, NULL);
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if (SUCCEEDED(hr))
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{
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IShellFolder* sf;
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LPCITEMIDLIST pidlLast;
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hr = SHBindToParent(pidl, IID_IShellFolder, (void**)&sf, &pidlLast);
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if (SUCCEEDED(hr))
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{
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SHDESCRIPTIONID did;
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hr = SHGetDataFromIDList(sf, pidlLast, SHGDFIL_DESCRIPTIONID, &did, sizeof(did));
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*clsid = did.clsid;
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static DWORD s_LastVolumeCount = 0;
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static ULONGLONG s_LastWriteTime = 0;
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sf->Release();
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bool changed = false;
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// Check if items have been added to recycle bin since last check.
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HKEY volumeKey;
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const WCHAR* subKey = L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\BitBucket\\Volume";
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LSTATUS ls = RegOpenKeyEx(HKEY_CURRENT_USER, subKey, 0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &volumeKey);
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if (ls == ERROR_SUCCESS)
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{
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DWORD volumeCount = 0;
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RegQueryInfoKey(volumeKey, NULL, NULL, NULL, &volumeCount, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
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if (volumeCount != s_LastVolumeCount)
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{
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s_LastVolumeCount = volumeCount;
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changed = true;
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}
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CoTaskMemFree(pidl);
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}
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return hr;
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WCHAR buffer[64];
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DWORD bufferSize = _countof(buffer);
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DWORD index = 0;
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while ((ls = RegEnumKeyEx(volumeKey, index, buffer, &bufferSize, NULL, NULL, NULL, NULL)) == ERROR_SUCCESS)
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{
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HKEY volumeSubKey;
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ls = RegOpenKeyEx(volumeKey, buffer, 0, KEY_QUERY_VALUE, &volumeSubKey);
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if (ls == ERROR_SUCCESS)
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{
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ULONGLONG lastWriteTime;
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ls = RegQueryInfoKey(volumeSubKey, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, (FILETIME*)&lastWriteTime);
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if (ls == ERROR_SUCCESS)
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{
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if (lastWriteTime > s_LastWriteTime)
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{
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s_LastWriteTime = lastWriteTime;
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changed = true;
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}
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// Return value must be freed with LocalFree
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LPWSTR GetCurrentUserSid()
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{
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LPWSTR sidStr = NULL;
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HANDLE hToken;
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if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken))
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{
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DWORD dwBufSize = 0;
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GetTokenInformation(hToken, TokenUser, NULL, 0, &dwBufSize);
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BYTE* buf = new BYTE[dwBufSize];
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if (GetTokenInformation(hToken, TokenUser, buf, dwBufSize, &dwBufSize))
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{
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TOKEN_USER* tu = (TOKEN_USER*)buf;
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ConvertSidToStringSid(tu->User.Sid, &sidStr);
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}
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delete [] buf;
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CloseHandle(hToken);
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}
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return sidStr;
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}
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CRawString GetRecycleBinDirectory(WCHAR drive, bool& isFAT)
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{
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WCHAR search[] = L"\0:\\";
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search[0] = drive;
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WCHAR filesystem[16];
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BOOL volumeResult = GetVolumeInformation(search, NULL, 0, NULL, NULL, NULL, filesystem, _countof(filesystem));
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if (!volumeResult)
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{
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return NULL;
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}
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if (wcscmp(filesystem, L"NTFS") == 0)
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{
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isFAT = false;
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}
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else if (wcscmp(filesystem, L"FAT") == 0 || wcscmp(filesystem, L"FAT32") == 0)
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{
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isFAT = true;
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}
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else
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{
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RmLog(LOG_ERROR, L"RecycleManager.dll: Unsupported filesystem");
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return NULL;
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}
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const WCHAR* binFolder;
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if (g_IsXP)
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{
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binFolder = isFAT ? L"RECYCLED" : L"RECYCLER";
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}
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else
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{
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binFolder = L"$RECYCLE.BIN";
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}
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bool found = false;
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WCHAR binPath[MAX_PATH];
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_snwprintf_s(binPath, _TRUNCATE, L"%s%s\\", search, binFolder);
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DWORD binAttributes = GetFileAttributes(binPath);
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if (binAttributes != INVALID_FILE_ATTRIBUTES &&
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binAttributes & (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_DIRECTORY))
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{
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if (isFAT)
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{
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if (_waccess(binPath, 0) != -1)
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{
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isFAT = true;
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found = true;
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}
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}
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else
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{
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// Get the correct, SID-specific bin for NTFS
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LPWSTR currentSid = GetCurrentUserSid();
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if (currentSid)
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{
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wcscat(binPath, currentSid);
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binAttributes = GetFileAttributes(binPath);
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if (binAttributes != INVALID_FILE_ATTRIBUTES &&
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binAttributes & FILE_ATTRIBUTE_DIRECTORY)
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{
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CLSID id;
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HRESULT hr = GetFolderCLSID(binPath, &id);
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if (SUCCEEDED(hr) && IsEqualGUID(CLSID_RecycleBin, id))
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{
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found = true;
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RegCloseKey(volumeSubKey);
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}
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}
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LocalFree(currentSid);
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bufferSize = _countof(buffer);
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++index;
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}
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RegCloseKey(volumeKey);
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}
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if (!changed)
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{
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// Check if recycle bin has been emptied.
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HKEY iconKey;
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const WCHAR* subKey = L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\CLSID\\{645FF040-5081-101B-9F08-00AA002F954E}\\DefaultIcon";
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ls = RegOpenKeyEx(HKEY_CURRENT_USER, subKey, 0, KEY_QUERY_VALUE, &iconKey);
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if (ls == ERROR_SUCCESS)
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{
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ULONGLONG lastWriteTime;
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ls = RegQueryInfoKey(iconKey, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, (FILETIME*)&lastWriteTime);
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if (ls == ERROR_SUCCESS)
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{
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if (lastWriteTime > s_LastWriteTime)
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{
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s_LastWriteTime = lastWriteTime;
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changed = true;
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}
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RegCloseKey(iconKey);
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}
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}
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}
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if (!found)
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{
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RmLog(LOG_ERROR, L"RecycleManager.dll: Unable to find bin");
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return NULL;
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}
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else
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{
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return binPath;
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}
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return changed;
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}
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