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reactos/dll/shellext/shellbtrfs/main.cpp

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/* Copyright (c) Mark Harmstone 2016-17
*
* This file is part of WinBtrfs.
*
* WinBtrfs is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public Licence as published by
* the Free Software Foundation, either version 3 of the Licence, or
* (at your option) any later version.
*
* WinBtrfs 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 Lesser General Public Licence for more details.
*
* You should have received a copy of the GNU Lesser General Public Licence
* along with WinBtrfs. If not, see <http://www.gnu.org/licenses/>. */
#include "shellext.h"
#include <windows.h>
#include <commctrl.h>
#include <strsafe.h>
#include <stddef.h>
#include "factory.h"
#include "resource.h"
static const GUID CLSID_ShellBtrfsIconHandler = { 0x2690b74f, 0xf353, 0x422d, { 0xbb, 0x12, 0x40, 0x15, 0x81, 0xee, 0xf8, 0xf0 } };
static const GUID CLSID_ShellBtrfsContextMenu = { 0x2690b74f, 0xf353, 0x422d, { 0xbb, 0x12, 0x40, 0x15, 0x81, 0xee, 0xf8, 0xf1 } };
static const GUID CLSID_ShellBtrfsPropSheet = { 0x2690b74f, 0xf353, 0x422d, { 0xbb, 0x12, 0x40, 0x15, 0x81, 0xee, 0xf8, 0xf2 } };
static const GUID CLSID_ShellBtrfsVolPropSheet = { 0x2690b74f, 0xf353, 0x422d, { 0xbb, 0x12, 0x40, 0x15, 0x81, 0xee, 0xf8, 0xf3 } };
#define COM_DESCRIPTION_ICON_HANDLER L"WinBtrfs shell extension (icon handler)"
#define COM_DESCRIPTION_CONTEXT_MENU L"WinBtrfs shell extension (context menu)"
#define COM_DESCRIPTION_PROP_SHEET L"WinBtrfs shell extension (property sheet)"
#define COM_DESCRIPTION_VOL_PROP_SHEET L"WinBtrfs shell extension (volume property sheet)"
#define ICON_OVERLAY_NAME L"WinBtrfs"
typedef enum _PROCESS_DPI_AWARENESS {
PROCESS_DPI_UNAWARE,
PROCESS_SYSTEM_DPI_AWARE,
PROCESS_PER_MONITOR_DPI_AWARE
} PROCESS_DPI_AWARENESS;
typedef ULONG (WINAPI *_RtlNtStatusToDosError)(NTSTATUS Status);
typedef HRESULT (WINAPI *_SetProcessDpiAwareness)(PROCESS_DPI_AWARENESS value);
HMODULE module;
LONG objs_loaded = 0;
void ShowError(HWND hwnd, ULONG err) {
WCHAR* buf;
if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL,
err, 0, (WCHAR*)&buf, 0, NULL) == 0) {
MessageBoxW(hwnd, L"FormatMessage failed", L"Error", MB_ICONERROR);
return;
}
MessageBoxW(hwnd, buf, L"Error", MB_ICONERROR);
LocalFree(buf);
}
void ShowStringError(HWND hwndDlg, int num, ...) {
WCHAR title[255], s[1024], t[1024];
va_list ap;
if (!LoadStringW(module, IDS_ERROR, title, sizeof(title) / sizeof(WCHAR))) {
ShowError(hwndDlg, GetLastError());
return;
}
if (!LoadStringW(module, num, s, sizeof(s) / sizeof(WCHAR))) {
ShowError(hwndDlg, GetLastError());
return;
}
va_start(ap, num);
#ifndef __REACTOS__
vswprintf(t, sizeof(t) / sizeof(WCHAR), s, ap);
#else
vsnwprintf(t, sizeof(t) / sizeof(WCHAR), s, ap);
#endif
MessageBoxW(hwndDlg, t, title, MB_ICONERROR);
va_end(ap);
}
void ShowNtStatusError(HWND hwnd, NTSTATUS Status) {
_RtlNtStatusToDosError RtlNtStatusToDosError;
HMODULE ntdll = LoadLibraryW(L"ntdll.dll");
if (!ntdll) {
MessageBoxW(hwnd, L"Error loading ntdll.dll", L"Error", MB_ICONERROR);
return;
}
RtlNtStatusToDosError = (_RtlNtStatusToDosError)GetProcAddress(ntdll, "RtlNtStatusToDosError");
if (!RtlNtStatusToDosError) {
MessageBoxW(hwnd, L"Error loading RtlNtStatusToDosError in ntdll.dll", L"Error", MB_ICONERROR);
FreeLibrary(ntdll);
return;
}
ShowError(hwnd, RtlNtStatusToDosError(Status));
FreeLibrary(ntdll);
}
void set_dpi_aware() {
_SetProcessDpiAwareness SetProcessDpiAwareness;
HMODULE shcore = LoadLibraryW(L"shcore.dll");
if (!shcore)
return;
SetProcessDpiAwareness = (_SetProcessDpiAwareness)GetProcAddress(shcore, "SetProcessDpiAwareness");
if (!SetProcessDpiAwareness)
return;
SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE);
}
void format_size(UINT64 size, WCHAR* s, ULONG len, BOOL show_bytes) {
WCHAR nb[255], nb2[255], t[255], bytes[255];
WCHAR kb[255];
ULONG sr;
float f;
NUMBERFMTW fmt;
WCHAR thou[4], grouping[64], *c;
_i64tow(size, nb, 10);
GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_STHOUSAND, thou, sizeof(thou) / sizeof(WCHAR));
fmt.NumDigits = 0;
fmt.LeadingZero = 1;
fmt.lpDecimalSep = (LPWSTR)L"."; // not used
fmt.lpThousandSep = thou;
fmt.NegativeOrder = 0;
// Grouping code copied from dlls/shlwapi/string.c in Wine - thank you
fmt.Grouping = 0;
GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_SGROUPING, grouping, sizeof(grouping) / sizeof(WCHAR));
c = grouping;
while (*c) {
if (*c >= '0' && *c < '9') {
fmt.Grouping *= 10;
fmt.Grouping += *c - '0';
}
c++;
}
if (fmt.Grouping % 10 == 0)
fmt.Grouping /= 10;
else
fmt.Grouping *= 10;
GetNumberFormatW(LOCALE_USER_DEFAULT, 0, nb, &fmt, nb2, sizeof(nb2) / sizeof(WCHAR));
if (size < 1024) {
if (!LoadStringW(module, size == 1 ? IDS_SIZE_BYTE : IDS_SIZE_BYTES, t, sizeof(t) / sizeof(WCHAR))) {
ShowError(NULL, GetLastError());
return;
}
if (StringCchPrintfW(s, len, t, nb2) == STRSAFE_E_INSUFFICIENT_BUFFER) {
ShowError(NULL, ERROR_INSUFFICIENT_BUFFER);
return;
}
return;
}
if (show_bytes) {
if (!LoadStringW(module, IDS_SIZE_BYTES, t, sizeof(t) / sizeof(WCHAR))) {
ShowError(NULL, GetLastError());
return;
}
if (StringCchPrintfW(bytes, sizeof(bytes) / sizeof(WCHAR), t, nb2) == STRSAFE_E_INSUFFICIENT_BUFFER) {
ShowError(NULL, ERROR_INSUFFICIENT_BUFFER);
return;
}
}
if (size >= 1152921504606846976) {
sr = IDS_SIZE_EB;
f = (float)size / 1152921504606846976.0f;
} else if (size >= 1125899906842624) {
sr = IDS_SIZE_PB;
f = (float)size / 1125899906842624.0f;
} else if (size >= 1099511627776) {
sr = IDS_SIZE_TB;
f = (float)size / 1099511627776.0f;
} else if (size >= 1073741824) {
sr = IDS_SIZE_GB;
f = (float)size / 1073741824.0f;
} else if (size >= 1048576) {
sr = IDS_SIZE_MB;
f = (float)size / 1048576.0f;
} else {
sr = IDS_SIZE_KB;
f = (float)size / 1024.0f;
}
if (!LoadStringW(module, sr, t, sizeof(t) / sizeof(WCHAR))) {
ShowError(NULL, GetLastError());
return;
}
if (show_bytes) {
if (StringCchPrintfW(kb, sizeof(kb) / sizeof(WCHAR), t, f) == STRSAFE_E_INSUFFICIENT_BUFFER) {
ShowError(NULL, ERROR_INSUFFICIENT_BUFFER);
return;
}
if (!LoadStringW(module, IDS_SIZE_LARGE, t, sizeof(t) / sizeof(WCHAR))) {
ShowError(NULL, GetLastError());
return;
}
if (StringCchPrintfW(s, len, t, kb, bytes) == STRSAFE_E_INSUFFICIENT_BUFFER) {
ShowError(NULL, ERROR_INSUFFICIENT_BUFFER);
return;
}
} else {
if (StringCchPrintfW(s, len, t, f) == STRSAFE_E_INSUFFICIENT_BUFFER) {
ShowError(NULL, ERROR_INSUFFICIENT_BUFFER);
return;
}
}
}
std::wstring format_message(ULONG last_error) {
WCHAR* buf;
std::wstring s;
if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL,
last_error, 0, (WCHAR*)&buf, 0, NULL) == 0) {
return L"(error retrieving message)";
}
s = buf;
LocalFree(buf);
// remove trailing newline
while (s.length() > 0 && (s.substr(s.length() - 1, 1) == L"\r" || s.substr(s.length() - 1, 1) == L"\n"))
s = s.substr(0, s.length() - 1);
return s;
}
std::wstring format_ntstatus(NTSTATUS Status) {
_RtlNtStatusToDosError RtlNtStatusToDosError;
std::wstring s;
HMODULE ntdll = LoadLibraryW(L"ntdll.dll");
if (!ntdll)
return L"(error loading ntdll.dll)";
RtlNtStatusToDosError = (_RtlNtStatusToDosError)GetProcAddress(ntdll, "RtlNtStatusToDosError");
if (!RtlNtStatusToDosError) {
FreeLibrary(ntdll);
return L"(error loading RtlNtStatusToDosError)";
}
s = format_message(RtlNtStatusToDosError(Status));
FreeLibrary(ntdll);
return s;
}
#ifdef __cplusplus
extern "C" {
#endif
STDAPI DllCanUnloadNow(void) {
return objs_loaded == 0 ? S_OK : S_FALSE;
}
STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID* ppv) {
if (rclsid == CLSID_ShellBtrfsIconHandler) {
Factory* fact = new Factory;
if (!fact)
return E_OUTOFMEMORY;
else {
fact->type = FactoryIconHandler;
return fact->QueryInterface(riid, ppv);
}
} else if (rclsid == CLSID_ShellBtrfsContextMenu) {
Factory* fact = new Factory;
if (!fact)
return E_OUTOFMEMORY;
else {
fact->type = FactoryContextMenu;
return fact->QueryInterface(riid, ppv);
}
} else if (rclsid == CLSID_ShellBtrfsPropSheet) {
Factory* fact = new Factory;
if (!fact)
return E_OUTOFMEMORY;
else {
fact->type = FactoryPropSheet;
return fact->QueryInterface(riid, ppv);
}
} else if (rclsid == CLSID_ShellBtrfsVolPropSheet) {
Factory* fact = new Factory;
if (!fact)
return E_OUTOFMEMORY;
else {
fact->type = FactoryVolPropSheet;
return fact->QueryInterface(riid, ppv);
}
}
return CLASS_E_CLASSNOTAVAILABLE;
}
static BOOL write_reg_key(HKEY root, const WCHAR* keyname, const WCHAR* val, DWORD type, const BYTE* data, DWORD datasize) {
LONG l;
HKEY hk;
DWORD dispos;
l = RegCreateKeyExW(root, keyname, 0, NULL, 0, KEY_ALL_ACCESS, NULL, &hk, &dispos);
if (l != ERROR_SUCCESS) {
WCHAR s[255];
wsprintfW(s, L"RegCreateKey returned %08x", l);
MessageBoxW(0, s, NULL, MB_ICONERROR);
return FALSE;
}
l = RegSetValueExW(hk, val, 0, type, data, datasize);
if (l != ERROR_SUCCESS) {
WCHAR s[255];
wsprintfW(s, L"RegSetValueEx returned %08x", l);
MessageBoxW(0, s, NULL, MB_ICONERROR);
return FALSE;
}
l = RegCloseKey(hk);
if (l != ERROR_SUCCESS) {
WCHAR s[255];
wsprintfW(s, L"RegCloseKey returned %08x", l);
MessageBoxW(0, s, NULL, MB_ICONERROR);
return FALSE;
}
return TRUE;
}
static BOOL register_clsid(const GUID clsid, const WCHAR* description) {
WCHAR* clsidstring;
WCHAR inproc[MAX_PATH], progid[MAX_PATH], clsidkeyname[MAX_PATH], dllpath[MAX_PATH];
BOOL ret = FALSE;
StringFromCLSID(clsid, &clsidstring);
wsprintfW(inproc, L"CLSID\\%s\\InprocServer32", clsidstring);
wsprintfW(progid, L"CLSID\\%s\\ProgId", clsidstring);
wsprintfW(clsidkeyname, L"CLSID\\%s", clsidstring);
if (!write_reg_key(HKEY_CLASSES_ROOT, clsidkeyname, NULL, REG_SZ, (BYTE*)description, (wcslen(description) + 1) * sizeof(WCHAR)))
goto end;
GetModuleFileNameW(module, dllpath, sizeof(dllpath));
if (!write_reg_key(HKEY_CLASSES_ROOT, inproc, NULL, REG_SZ, (BYTE*)dllpath, (wcslen(dllpath) + 1) * sizeof(WCHAR)))
goto end;
if (!write_reg_key(HKEY_CLASSES_ROOT, inproc, L"ThreadingModel", REG_SZ, (BYTE*)L"Apartment", (wcslen(L"Apartment") + 1) * sizeof(WCHAR)))
goto end;
ret = TRUE;
end:
CoTaskMemFree(clsidstring);
return ret;
}
static BOOL unregister_clsid(const GUID clsid) {
WCHAR* clsidstring;
WCHAR clsidkeyname[MAX_PATH];
BOOL ret = FALSE;
LONG l;
StringFromCLSID(clsid, &clsidstring);
wsprintfW(clsidkeyname, L"CLSID\\%s", clsidstring);
l = RegDeleteTreeW(HKEY_CLASSES_ROOT, clsidkeyname);
if (l != ERROR_SUCCESS) {
WCHAR s[255];
wsprintfW(s, L"RegDeleteTree returned %08x", l);
MessageBoxW(0, s, NULL, MB_ICONERROR);
ret = FALSE;
} else
ret = TRUE;
CoTaskMemFree(clsidstring);
return ret;
}
static BOOL reg_icon_overlay(const GUID clsid, const WCHAR* name) {
WCHAR path[MAX_PATH];
WCHAR* clsidstring;
BOOL ret = FALSE;
StringFromCLSID(clsid, &clsidstring);
wcscpy(path, L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ShellIconOverlayIdentifiers\\");
wcscat(path, name);
if (!write_reg_key(HKEY_LOCAL_MACHINE, path, NULL, REG_SZ, (BYTE*)clsidstring, (wcslen(clsidstring) + 1) * sizeof(WCHAR)))
goto end;
ret = TRUE;
end:
CoTaskMemFree(clsidstring);
return ret;
}
static BOOL unreg_icon_overlay(const WCHAR* name) {
WCHAR path[MAX_PATH];
LONG l;
wcscpy(path, L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ShellIconOverlayIdentifiers\\");
wcscat(path, name);
l = RegDeleteTreeW(HKEY_LOCAL_MACHINE, path);
if (l != ERROR_SUCCESS) {
WCHAR s[255];
wsprintfW(s, L"RegDeleteTree returned %08x", l);
MessageBoxW(0, s, NULL, MB_ICONERROR);
return FALSE;
} else
return TRUE;
}
static BOOL reg_context_menu_handler(const GUID clsid, const WCHAR* filetype, const WCHAR* name) {
WCHAR path[MAX_PATH];
WCHAR* clsidstring;
BOOL ret = FALSE;
StringFromCLSID(clsid, &clsidstring);
wcscpy(path, filetype);
wcscat(path, L"\\ShellEx\\ContextMenuHandlers\\");
wcscat(path, name);
if (!write_reg_key(HKEY_CLASSES_ROOT, path, NULL, REG_SZ, (BYTE*)clsidstring, (wcslen(clsidstring) + 1) * sizeof(WCHAR)))
goto end;
ret = TRUE;
end:
CoTaskMemFree(clsidstring);
return ret;
}
static BOOL unreg_context_menu_handler(const WCHAR* filetype, const WCHAR* name) {
WCHAR path[MAX_PATH];
LONG l;
wcscpy(path, filetype);
wcscat(path, L"\\ShellEx\\ContextMenuHandlers\\");
wcscat(path, name);
l = RegDeleteTreeW(HKEY_CLASSES_ROOT, path);
if (l != ERROR_SUCCESS) {
WCHAR s[255];
wsprintfW(s, L"RegDeleteTree returned %08x", l);
MessageBoxW(0, s, NULL, MB_ICONERROR);
return FALSE;
} else
return TRUE;
}
static BOOL reg_prop_sheet_handler(const GUID clsid, const WCHAR* filetype, const WCHAR* name) {
WCHAR path[MAX_PATH];
WCHAR* clsidstring;
BOOL ret = FALSE;
StringFromCLSID(clsid, &clsidstring);
wcscpy(path, filetype);
wcscat(path, L"\\ShellEx\\PropertySheetHandlers\\");
wcscat(path, name);
if (!write_reg_key(HKEY_CLASSES_ROOT, path, NULL, REG_SZ, (BYTE*)clsidstring, (wcslen(clsidstring) + 1) * sizeof(WCHAR)))
goto end;
ret = TRUE;
end:
CoTaskMemFree(clsidstring);
return ret;
}
static BOOL unreg_prop_sheet_handler(const WCHAR* filetype, const WCHAR* name) {
WCHAR path[MAX_PATH];
LONG l;
wcscpy(path, filetype);
wcscat(path, L"\\ShellEx\\PropertySheetHandlers\\");
wcscat(path, name);
l = RegDeleteTreeW(HKEY_CLASSES_ROOT, path);
if (l != ERROR_SUCCESS) {
WCHAR s[255];
wsprintfW(s, L"RegDeleteTree returned %08x", l);
MessageBoxW(0, s, NULL, MB_ICONERROR);
return FALSE;
} else
return TRUE;
}
STDAPI DllRegisterServer(void) {
if (!register_clsid(CLSID_ShellBtrfsIconHandler, COM_DESCRIPTION_ICON_HANDLER))
return E_FAIL;
if (!register_clsid(CLSID_ShellBtrfsContextMenu, COM_DESCRIPTION_CONTEXT_MENU))
return E_FAIL;
if (!register_clsid(CLSID_ShellBtrfsPropSheet, COM_DESCRIPTION_PROP_SHEET))
return E_FAIL;
if (!register_clsid(CLSID_ShellBtrfsVolPropSheet, COM_DESCRIPTION_VOL_PROP_SHEET))
return E_FAIL;
if (!reg_icon_overlay(CLSID_ShellBtrfsIconHandler, ICON_OVERLAY_NAME)) {
MessageBoxW(0, L"Failed to register icon overlay.", NULL, MB_ICONERROR);
return E_FAIL;
}
if (!reg_context_menu_handler(CLSID_ShellBtrfsContextMenu, L"Directory\\Background", ICON_OVERLAY_NAME)) {
MessageBoxW(0, L"Failed to register context menu handler.", NULL, MB_ICONERROR);
return E_FAIL;
}
if (!reg_context_menu_handler(CLSID_ShellBtrfsContextMenu, L"Folder", ICON_OVERLAY_NAME)) {
MessageBoxW(0, L"Failed to register context menu handler.", NULL, MB_ICONERROR);
return E_FAIL;
}
if (!reg_prop_sheet_handler(CLSID_ShellBtrfsPropSheet, L"Folder", ICON_OVERLAY_NAME)) {
MessageBoxW(0, L"Failed to register property sheet handler.", NULL, MB_ICONERROR);
return E_FAIL;
}
if (!reg_prop_sheet_handler(CLSID_ShellBtrfsPropSheet, L"*", ICON_OVERLAY_NAME)) {
MessageBoxW(0, L"Failed to register property sheet handler.", NULL, MB_ICONERROR);
return E_FAIL;
}
if (!reg_prop_sheet_handler(CLSID_ShellBtrfsVolPropSheet, L"Drive", ICON_OVERLAY_NAME)) {
MessageBoxW(0, L"Failed to register volume property sheet handler.", NULL, MB_ICONERROR);
return E_FAIL;
}
return S_OK;
}
STDAPI DllUnregisterServer(void) {
unreg_prop_sheet_handler(L"Folder", ICON_OVERLAY_NAME);
unreg_prop_sheet_handler(L"*", ICON_OVERLAY_NAME);
unreg_prop_sheet_handler(L"Drive", ICON_OVERLAY_NAME);
unreg_context_menu_handler(L"Folder", ICON_OVERLAY_NAME);
unreg_context_menu_handler(L"Directory\\Background", ICON_OVERLAY_NAME);
unreg_icon_overlay(ICON_OVERLAY_NAME);
if (!unregister_clsid(CLSID_ShellBtrfsVolPropSheet))
return E_FAIL;
if (!unregister_clsid(CLSID_ShellBtrfsPropSheet))
return E_FAIL;
if (!unregister_clsid(CLSID_ShellBtrfsContextMenu))
return E_FAIL;
if (!unregister_clsid(CLSID_ShellBtrfsIconHandler))
return E_FAIL;
return S_OK;
}
STDAPI DllInstall(BOOL bInstall, LPCWSTR pszCmdLine) {
if (bInstall)
return DllRegisterServer();
else
return DllUnregisterServer();
}
BOOL APIENTRY DllMain(HANDLE hModule, DWORD dwReason, void* lpReserved) {
if (dwReason == DLL_PROCESS_ATTACH)
module = (HMODULE)hModule;
return TRUE;
}
static void create_subvol(std::wstring fn) {
size_t found = fn.rfind(L"\\");
std::wstring path, file;
HANDLE h;
ULONG bcslen;
btrfs_create_subvol* bcs;
IO_STATUS_BLOCK iosb;
if (found == std::wstring::npos) {
path = L"";
file = fn;
} else {
path = fn.substr(0, found);
file = fn.substr(found + 1);
}
path += L"\\";
h = CreateFileW(path.c_str(), FILE_ADD_SUBDIRECTORY, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE)
return;
bcslen = offsetof(btrfs_create_subvol, name[0]) + (file.length() * sizeof(WCHAR));
bcs = (btrfs_create_subvol*)malloc(bcslen);
bcs->readonly = FALSE;
bcs->posix = FALSE;
bcs->namelen = file.length() * sizeof(WCHAR);
memcpy(bcs->name, file.c_str(), bcs->namelen);
NtFsControlFile(h, NULL, NULL, NULL, &iosb, FSCTL_BTRFS_CREATE_SUBVOL, bcs, bcslen, NULL, 0);
CloseHandle(h);
}
void CALLBACK CreateSubvolW(HWND hwnd, HINSTANCE hinst, LPWSTR lpszCmdLine, int nCmdShow) {
LPWSTR* args;
int num_args;
args = CommandLineToArgvW(lpszCmdLine, &num_args);
if (!args)
return;
if (num_args >= 1)
create_subvol(args[0]);
LocalFree(args);
}
static void create_snapshot2(std::wstring source, std::wstring fn) {
size_t found = fn.rfind(L"\\");
std::wstring path, file;
HANDLE h, src;
ULONG bcslen;
btrfs_create_snapshot* bcs;
IO_STATUS_BLOCK iosb;
if (found == std::wstring::npos) {
path = L"";
file = fn;
} else {
path = fn.substr(0, found);
file = fn.substr(found + 1);
}
path += L"\\";
src = CreateFileW(source.c_str(), FILE_TRAVERSE, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (src == INVALID_HANDLE_VALUE)
return;
h = CreateFileW(path.c_str(), FILE_ADD_SUBDIRECTORY, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE) {
CloseHandle(src);
return;
}
bcslen = offsetof(btrfs_create_snapshot, name[0]) + (file.length() * sizeof(WCHAR));
bcs = (btrfs_create_snapshot*)malloc(bcslen);
bcs->readonly = FALSE;
bcs->posix = FALSE;
bcs->namelen = file.length() * sizeof(WCHAR);
memcpy(bcs->name, file.c_str(), bcs->namelen);
bcs->subvol = src;
NtFsControlFile(h, NULL, NULL, NULL, &iosb, FSCTL_BTRFS_CREATE_SNAPSHOT, bcs, bcslen, NULL, 0);
CloseHandle(h);
CloseHandle(src);
}
void CALLBACK CreateSnapshotW(HWND hwnd, HINSTANCE hinst, LPWSTR lpszCmdLine, int nCmdShow) {
LPWSTR* args;
int num_args;
args = CommandLineToArgvW(lpszCmdLine, &num_args);
if (!args)
return;
if (num_args >= 2)
create_snapshot2(args[0], args[1]);
LocalFree(args);
}
#ifdef __cplusplus
}
#endif
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