[SHELLBTRFS] Upgrade to 1.5
[reactos.git] / dll / shellext / shellbtrfs / main.cpp
1 /* Copyright (c) Mark Harmstone 2016-17
2 *
3 * This file is part of WinBtrfs.
4 *
5 * WinBtrfs is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public Licence as published by
7 * the Free Software Foundation, either version 3 of the Licence, or
8 * (at your option) any later version.
9 *
10 * WinBtrfs is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public Licence for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public Licence
16 * along with WinBtrfs. If not, see <http://www.gnu.org/licenses/>. */
17
18 #include "shellext.h"
19 #include <windows.h>
20 #include <commctrl.h>
21 #include <strsafe.h>
22 #include <stddef.h>
23 #include <stdexcept>
24 #include "factory.h"
25 #include "resource.h"
26
27 static const GUID CLSID_ShellBtrfsIconHandler = { 0x2690b74f, 0xf353, 0x422d, { 0xbb, 0x12, 0x40, 0x15, 0x81, 0xee, 0xf8, 0xf0 } };
28 static const GUID CLSID_ShellBtrfsContextMenu = { 0x2690b74f, 0xf353, 0x422d, { 0xbb, 0x12, 0x40, 0x15, 0x81, 0xee, 0xf8, 0xf1 } };
29 static const GUID CLSID_ShellBtrfsPropSheet = { 0x2690b74f, 0xf353, 0x422d, { 0xbb, 0x12, 0x40, 0x15, 0x81, 0xee, 0xf8, 0xf2 } };
30 static const GUID CLSID_ShellBtrfsVolPropSheet = { 0x2690b74f, 0xf353, 0x422d, { 0xbb, 0x12, 0x40, 0x15, 0x81, 0xee, 0xf8, 0xf3 } };
31
32 #define COM_DESCRIPTION_ICON_HANDLER L"WinBtrfs shell extension (icon handler)"
33 #define COM_DESCRIPTION_CONTEXT_MENU L"WinBtrfs shell extension (context menu)"
34 #define COM_DESCRIPTION_PROP_SHEET L"WinBtrfs shell extension (property sheet)"
35 #define COM_DESCRIPTION_VOL_PROP_SHEET L"WinBtrfs shell extension (volume property sheet)"
36 #define ICON_OVERLAY_NAME L"WinBtrfs"
37
38 typedef enum _PROCESS_DPI_AWARENESS {
39 PROCESS_DPI_UNAWARE,
40 PROCESS_SYSTEM_DPI_AWARE,
41 PROCESS_PER_MONITOR_DPI_AWARE
42 } PROCESS_DPI_AWARENESS;
43
44 typedef ULONG (WINAPI *_RtlNtStatusToDosError)(NTSTATUS Status);
45 typedef HRESULT (WINAPI *_SetProcessDpiAwareness)(PROCESS_DPI_AWARENESS value);
46
47 HMODULE module;
48 LONG objs_loaded = 0;
49
50 void set_dpi_aware() {
51 _SetProcessDpiAwareness SetProcessDpiAwareness;
52 HMODULE shcore = LoadLibraryW(L"shcore.dll");
53
54 if (!shcore)
55 return;
56
57 SetProcessDpiAwareness = (_SetProcessDpiAwareness)GetProcAddress(shcore, "SetProcessDpiAwareness");
58
59 if (!SetProcessDpiAwareness)
60 return;
61
62 SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE);
63 }
64
65 void format_size(uint64_t size, wstring& s, bool show_bytes) {
66 wstring t, bytes, kb, nb;
67 WCHAR nb2[255];
68 ULONG sr;
69 float f;
70 NUMBERFMTW fmt;
71 WCHAR dec[2], thou[4], grouping[64], *c;
72 #ifdef __REACTOS__
73 WCHAR buffer[64];
74 #endif
75
76 #ifndef __REACTOS__
77 nb = to_wstring(size);
78 #else
79 swprintf(buffer, L"%I64d", size);
80 nb = wstring(buffer);
81 #endif
82
83 GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_STHOUSAND, thou, sizeof(thou) / sizeof(WCHAR));
84
85 dec[0] = '.'; dec[1] = 0; // not used, but silences gcc warning
86
87 fmt.NumDigits = 0;
88 fmt.LeadingZero = 1;
89 fmt.lpDecimalSep = dec;
90 fmt.lpThousandSep = thou;
91 fmt.NegativeOrder = 0;
92
93 // Grouping code copied from dlls/shlwapi/string.c in Wine - thank you
94
95 fmt.Grouping = 0;
96 GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_SGROUPING, grouping, sizeof(grouping) / sizeof(WCHAR));
97
98 c = grouping;
99 while (*c) {
100 if (*c >= '0' && *c < '9') {
101 fmt.Grouping *= 10;
102 fmt.Grouping += *c - '0';
103 }
104
105 c++;
106 }
107
108 if (fmt.Grouping % 10 == 0)
109 fmt.Grouping /= 10;
110 else
111 fmt.Grouping *= 10;
112
113 GetNumberFormatW(LOCALE_USER_DEFAULT, 0, nb.c_str(), &fmt, nb2, sizeof(nb2) / sizeof(WCHAR));
114
115 if (size < 1024) {
116 if (!load_string(module, size == 1 ? IDS_SIZE_BYTE : IDS_SIZE_BYTES, t))
117 throw last_error(GetLastError());
118
119 wstring_sprintf(s, t, nb2);
120 return;
121 }
122
123 if (show_bytes) {
124 if (!load_string(module, IDS_SIZE_BYTES, t))
125 throw last_error(GetLastError());
126
127 wstring_sprintf(bytes, t, nb2);
128 }
129
130 if (size >= 1152921504606846976) {
131 sr = IDS_SIZE_EB;
132 f = (float)size / 1152921504606846976.0f;
133 } else if (size >= 1125899906842624) {
134 sr = IDS_SIZE_PB;
135 f = (float)size / 1125899906842624.0f;
136 } else if (size >= 1099511627776) {
137 sr = IDS_SIZE_TB;
138 f = (float)size / 1099511627776.0f;
139 } else if (size >= 1073741824) {
140 sr = IDS_SIZE_GB;
141 f = (float)size / 1073741824.0f;
142 } else if (size >= 1048576) {
143 sr = IDS_SIZE_MB;
144 f = (float)size / 1048576.0f;
145 } else {
146 sr = IDS_SIZE_KB;
147 f = (float)size / 1024.0f;
148 }
149
150 if (!load_string(module, sr, t))
151 throw last_error(GetLastError());
152
153 if (show_bytes) {
154 wstring_sprintf(kb, t, f);
155
156 if (!load_string(module, IDS_SIZE_LARGE, t))
157 throw last_error(GetLastError());
158
159 wstring_sprintf(s, t, kb.c_str(), bytes.c_str());
160 } else
161 wstring_sprintf(s, t, f);
162 }
163
164 wstring format_message(ULONG last_error) {
165 WCHAR* buf;
166 wstring s;
167
168 if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr,
169 last_error, 0, (WCHAR*)&buf, 0, nullptr) == 0) {
170 return L"(error retrieving message)";
171 }
172
173 s = buf;
174
175 LocalFree(buf);
176
177 // remove trailing newline
178 while (s.length() > 0 && (s.substr(s.length() - 1, 1) == L"\r" || s.substr(s.length() - 1, 1) == L"\n"))
179 s = s.substr(0, s.length() - 1);
180
181 return s;
182 }
183
184 wstring format_ntstatus(NTSTATUS Status) {
185 _RtlNtStatusToDosError RtlNtStatusToDosError;
186 wstring s;
187 HMODULE ntdll = LoadLibraryW(L"ntdll.dll");
188
189 if (!ntdll)
190 return L"(error loading ntdll.dll)";
191
192 RtlNtStatusToDosError = (_RtlNtStatusToDosError)GetProcAddress(ntdll, "RtlNtStatusToDosError");
193
194 if (!RtlNtStatusToDosError) {
195 FreeLibrary(ntdll);
196 return L"(error loading RtlNtStatusToDosError)";
197 }
198
199 s = format_message(RtlNtStatusToDosError(Status));
200
201 FreeLibrary(ntdll);
202
203 return s;
204 }
205
206 bool load_string(HMODULE module, UINT id, wstring& s) {
207 int len;
208 LPWSTR retstr = nullptr;
209
210 len = LoadStringW(module, id, (LPWSTR)&retstr, 0);
211
212 if (len == 0)
213 return false;
214
215 s = wstring(retstr, len);
216
217 return true;
218 }
219
220 #ifdef _MSC_VER
221 #pragma warning(push)
222 #pragma warning(disable: 4996)
223 #endif
224
225 void wstring_sprintf(wstring& s, wstring fmt, ...) {
226 int len;
227 va_list args;
228
229 va_start(args, fmt);
230 len = _vsnwprintf(nullptr, 0, fmt.c_str(), args);
231
232 if (len == 0)
233 s = L"";
234 else {
235 s.resize(len);
236 _vsnwprintf((wchar_t*)s.c_str(), len, fmt.c_str(), args);
237 }
238
239 va_end(args);
240 }
241
242 #ifdef _MSC_VER
243 #pragma warning(pop)
244 #endif
245
246 extern "C" STDAPI DllCanUnloadNow(void) {
247 return objs_loaded == 0 ? S_OK : S_FALSE;
248 }
249
250 extern "C" STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID* ppv) {
251 if (rclsid == CLSID_ShellBtrfsIconHandler) {
252 Factory* fact = new Factory;
253 if (!fact)
254 return E_OUTOFMEMORY;
255 else {
256 fact->type = FactoryIconHandler;
257
258 return fact->QueryInterface(riid, ppv);
259 }
260 } else if (rclsid == CLSID_ShellBtrfsContextMenu) {
261 Factory* fact = new Factory;
262 if (!fact)
263 return E_OUTOFMEMORY;
264 else {
265 fact->type = FactoryContextMenu;
266
267 return fact->QueryInterface(riid, ppv);
268 }
269 } else if (rclsid == CLSID_ShellBtrfsPropSheet) {
270 Factory* fact = new Factory;
271 if (!fact)
272 return E_OUTOFMEMORY;
273 else {
274 fact->type = FactoryPropSheet;
275
276 return fact->QueryInterface(riid, ppv);
277 }
278 } else if (rclsid == CLSID_ShellBtrfsVolPropSheet) {
279 Factory* fact = new Factory;
280 if (!fact)
281 return E_OUTOFMEMORY;
282 else {
283 fact->type = FactoryVolPropSheet;
284
285 return fact->QueryInterface(riid, ppv);
286 }
287 }
288
289 return CLASS_E_CLASSNOTAVAILABLE;
290 }
291
292 static void write_reg_key(HKEY root, const wstring& keyname, const WCHAR* val, const wstring& data) {
293 LONG l;
294 HKEY hk;
295 DWORD dispos;
296
297 l = RegCreateKeyExW(root, keyname.c_str(), 0, nullptr, 0, KEY_ALL_ACCESS, nullptr, &hk, &dispos);
298 if (l != ERROR_SUCCESS)
299 throw string_error(IDS_REGCREATEKEY_FAILED, l);
300
301 l = RegSetValueExW(hk, val, 0, REG_SZ, (const BYTE*)data.c_str(), (DWORD)((data.length() + 1) * sizeof(WCHAR)));
302 if (l != ERROR_SUCCESS)
303 throw string_error(IDS_REGSETVALUEEX_FAILED, l);
304
305 l = RegCloseKey(hk);
306 if (l != ERROR_SUCCESS)
307 throw string_error(IDS_REGCLOSEKEY_FAILED, l);
308 }
309
310 static void register_clsid(const GUID clsid, const WCHAR* description) {
311 WCHAR* clsidstring;
312 wstring inproc, progid, clsidkeyname;
313 WCHAR dllpath[MAX_PATH];
314
315 StringFromCLSID(clsid, &clsidstring);
316
317 try {
318 #ifndef __REACTOS__
319 inproc = L"CLSID\\"s + clsidstring + L"\\InprocServer32"s;
320 progid = L"CLSID\\"s + clsidstring + L"\\ProgId"s;
321 clsidkeyname = L"CLSID\\"s + clsidstring;
322 #else
323 inproc = wstring(L"CLSID\\") + clsidstring + wstring(L"\\InprocServer32");
324 progid = wstring(L"CLSID\\") + clsidstring + wstring(L"\\ProgId");
325 clsidkeyname = wstring(L"CLSID\\") + clsidstring;
326 #endif
327
328 write_reg_key(HKEY_CLASSES_ROOT, clsidkeyname, nullptr, description);
329
330 GetModuleFileNameW(module, dllpath, sizeof(dllpath));
331
332 write_reg_key(HKEY_CLASSES_ROOT, inproc, nullptr, dllpath);
333
334 write_reg_key(HKEY_CLASSES_ROOT, inproc, L"ThreadingModel", L"Apartment");
335 } catch (...) {
336 CoTaskMemFree(clsidstring);
337 throw;
338 }
339
340 CoTaskMemFree(clsidstring);
341 }
342
343 // implementation of RegDeleteTreeW, only available from Vista on
344 static void reg_delete_tree(HKEY hkey, const wstring& keyname) {
345 HKEY k;
346 LSTATUS ret;
347
348 ret = RegOpenKeyExW(hkey, keyname.c_str(), 0, KEY_READ, &k);
349
350 if (ret != ERROR_SUCCESS)
351 throw last_error(ret);
352
353 try {
354 WCHAR* buf;
355 ULONG bufsize;
356
357 ret = RegQueryInfoKeyW(k, nullptr, nullptr, nullptr, nullptr, &bufsize, nullptr,
358 nullptr, nullptr, nullptr, nullptr, nullptr);
359 if (ret != ERROR_SUCCESS)
360 throw last_error(ret);
361
362 bufsize++;
363 buf = new WCHAR[bufsize];
364
365 try {
366 do {
367 ULONG size = bufsize;
368
369 ret = RegEnumKeyExW(k, 0, buf, &size, nullptr, nullptr, nullptr, nullptr);
370
371 if (ret == ERROR_NO_MORE_ITEMS)
372 break;
373 else if (ret != ERROR_SUCCESS)
374 throw last_error(ret);
375
376 reg_delete_tree(k, buf);
377 } while (true);
378
379 ret = RegDeleteKeyW(hkey, keyname.c_str());
380 if (ret != ERROR_SUCCESS)
381 throw last_error(ret);
382 } catch (...) {
383 delete[] buf;
384 throw;
385 }
386
387 delete[] buf;
388 } catch (...) {
389 RegCloseKey(k);
390 throw;
391 }
392
393 RegCloseKey(k);
394 }
395
396 static void unregister_clsid(const GUID clsid) {
397 WCHAR* clsidstring;
398
399 StringFromCLSID(clsid, &clsidstring);
400
401 try {
402 #ifndef __REACTOS__
403 reg_delete_tree(HKEY_CLASSES_ROOT, L"CLSID\\"s + clsidstring);
404 #else
405 wstring path = wstring(L"CLSID\\") + clsidstring;
406 reg_delete_tree(HKEY_CLASSES_ROOT, path);
407 #endif
408 } catch (...) {
409 CoTaskMemFree(clsidstring);
410 throw;
411 }
412
413 CoTaskMemFree(clsidstring);
414 }
415
416 static void reg_icon_overlay(const GUID clsid, const wstring& name) {
417 WCHAR* clsidstring;
418
419 StringFromCLSID(clsid, &clsidstring);
420
421 try {
422 #ifndef __REACTOS__
423 wstring path = L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ShellIconOverlayIdentifiers\\"s + name;
424 #else
425 wstring path = wstring(L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ShellIconOverlayIdentifiers\\") + name;
426 #endif
427
428 write_reg_key(HKEY_LOCAL_MACHINE, path, nullptr, clsidstring);
429 } catch (...) {
430 CoTaskMemFree(clsidstring);
431 throw;
432 }
433
434 CoTaskMemFree(clsidstring);
435 }
436
437 static void unreg_icon_overlay(const wstring& name) {
438 #ifndef __REACTOS__
439 reg_delete_tree(HKEY_LOCAL_MACHINE, L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ShellIconOverlayIdentifiers\\"s + name);
440 #else
441 wstring path = wstring(L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ShellIconOverlayIdentifiers\\") + name;
442 reg_delete_tree(HKEY_LOCAL_MACHINE, path);
443 #endif
444 }
445
446 static void reg_context_menu_handler(const GUID clsid, const wstring& filetype, const wstring& name) {
447 WCHAR* clsidstring;
448
449 StringFromCLSID(clsid, &clsidstring);
450
451 try {
452 #ifndef __REACTOS__
453 wstring path = filetype + L"\\ShellEx\\ContextMenuHandlers\\"s + name;
454 #else
455 wstring path = filetype + wstring(L"\\ShellEx\\ContextMenuHandlers\\") + name;
456 #endif
457
458 write_reg_key(HKEY_CLASSES_ROOT, path, nullptr, clsidstring);
459 } catch (...) {
460 CoTaskMemFree(clsidstring);
461 throw;
462 }
463 }
464
465 static void unreg_context_menu_handler(const wstring& filetype, const wstring& name) {
466 #ifndef __REACTOS__
467 reg_delete_tree(HKEY_CLASSES_ROOT, filetype + L"\\ShellEx\\ContextMenuHandlers\\"s + name);
468 #else
469 wstring path = filetype + wstring(L"\\ShellEx\\ContextMenuHandlers\\") + name;
470 reg_delete_tree(HKEY_CLASSES_ROOT, path);
471 #endif
472 }
473
474 static void reg_prop_sheet_handler(const GUID clsid, const wstring& filetype, const wstring& name) {
475 WCHAR* clsidstring;
476
477 StringFromCLSID(clsid, &clsidstring);
478
479 try {
480 #ifndef __REACTOS__
481 wstring path = filetype + L"\\ShellEx\\PropertySheetHandlers\\"s + name;
482 #else
483 wstring path = filetype + wstring(L"\\ShellEx\\PropertySheetHandlers\\") + name;
484 #endif
485
486 write_reg_key(HKEY_CLASSES_ROOT, path, nullptr, clsidstring);
487 } catch (...) {
488 CoTaskMemFree(clsidstring);
489 throw;
490 }
491 }
492
493 static void unreg_prop_sheet_handler(const wstring& filetype, const wstring& name) {
494 #ifndef __REACTOS__
495 reg_delete_tree(HKEY_CLASSES_ROOT, filetype + L"\\ShellEx\\PropertySheetHandlers\\"s + name);
496 #else
497 wstring path = filetype + wstring(L"\\ShellEx\\PropertySheetHandlers\\") + name;
498 reg_delete_tree(HKEY_CLASSES_ROOT, path);
499 #endif
500 }
501
502 extern "C" STDAPI DllRegisterServer(void) {
503 try {
504 register_clsid(CLSID_ShellBtrfsIconHandler, COM_DESCRIPTION_ICON_HANDLER);
505 register_clsid(CLSID_ShellBtrfsContextMenu, COM_DESCRIPTION_CONTEXT_MENU);
506 register_clsid(CLSID_ShellBtrfsPropSheet, COM_DESCRIPTION_PROP_SHEET);
507 register_clsid(CLSID_ShellBtrfsVolPropSheet, COM_DESCRIPTION_VOL_PROP_SHEET);
508
509 reg_icon_overlay(CLSID_ShellBtrfsIconHandler, ICON_OVERLAY_NAME);
510
511 reg_context_menu_handler(CLSID_ShellBtrfsContextMenu, L"Directory\\Background", ICON_OVERLAY_NAME);
512 reg_context_menu_handler(CLSID_ShellBtrfsContextMenu, L"Folder", ICON_OVERLAY_NAME);
513
514 reg_prop_sheet_handler(CLSID_ShellBtrfsPropSheet, L"Folder", ICON_OVERLAY_NAME);
515 reg_prop_sheet_handler(CLSID_ShellBtrfsPropSheet, L"*", ICON_OVERLAY_NAME);
516 reg_prop_sheet_handler(CLSID_ShellBtrfsVolPropSheet, L"Drive", ICON_OVERLAY_NAME);
517 } catch (const exception& e) {
518 error_message(nullptr, e.what());
519 return E_FAIL;
520 }
521
522 return S_OK;
523 }
524
525 extern "C" STDAPI DllUnregisterServer(void) {
526 try {
527 unreg_prop_sheet_handler(L"Folder", ICON_OVERLAY_NAME);
528 unreg_prop_sheet_handler(L"*", ICON_OVERLAY_NAME);
529 unreg_prop_sheet_handler(L"Drive", ICON_OVERLAY_NAME);
530 unreg_context_menu_handler(L"Folder", ICON_OVERLAY_NAME);
531 unreg_context_menu_handler(L"Directory\\Background", ICON_OVERLAY_NAME);
532 unreg_icon_overlay(ICON_OVERLAY_NAME);
533
534 unregister_clsid(CLSID_ShellBtrfsVolPropSheet);
535 unregister_clsid(CLSID_ShellBtrfsPropSheet);
536 unregister_clsid(CLSID_ShellBtrfsContextMenu);
537 unregister_clsid(CLSID_ShellBtrfsIconHandler);
538 } catch (const exception& e) {
539 error_message(nullptr, e.what());
540 return E_FAIL;
541 }
542
543 return S_OK;
544 }
545
546 extern "C" STDAPI DllInstall(BOOL bInstall, LPCWSTR pszCmdLine) {
547 if (bInstall)
548 return DllRegisterServer();
549 else
550 return DllUnregisterServer();
551 }
552
553 extern "C" BOOL APIENTRY DllMain(HANDLE hModule, DWORD dwReason, void* lpReserved) {
554 if (dwReason == DLL_PROCESS_ATTACH)
555 module = (HMODULE)hModule;
556
557 return true;
558 }
559
560 static void create_subvol(const wstring& fn) {
561 size_t found = fn.rfind(L"\\");
562 wstring path, file;
563 win_handle h;
564 btrfs_create_subvol* bcs;
565 IO_STATUS_BLOCK iosb;
566
567 if (found == wstring::npos) {
568 path = L"";
569 file = fn;
570 } else {
571 path = fn.substr(0, found);
572 file = fn.substr(found + 1);
573 }
574 path += L"\\";
575
576 h = CreateFileW(path.c_str(), FILE_ADD_SUBDIRECTORY, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, nullptr);
577
578 if (h == INVALID_HANDLE_VALUE)
579 return;
580
581 size_t bcslen = offsetof(btrfs_create_subvol, name[0]) + (file.length() * sizeof(WCHAR));
582 bcs = (btrfs_create_subvol*)malloc(bcslen);
583
584 bcs->readonly = false;
585 bcs->posix = false;
586 bcs->namelen = (uint16_t)(file.length() * sizeof(WCHAR));
587 memcpy(bcs->name, file.c_str(), bcs->namelen);
588
589 NtFsControlFile(h, nullptr, nullptr, nullptr, &iosb, FSCTL_BTRFS_CREATE_SUBVOL, bcs, (ULONG)bcslen, nullptr, 0);
590 }
591
592 extern "C" void CALLBACK CreateSubvolW(HWND hwnd, HINSTANCE hinst, LPWSTR lpszCmdLine, int nCmdShow) {
593 vector<wstring> args;
594
595 command_line_to_args(lpszCmdLine, args);
596
597 if (args.size() >= 1)
598 create_subvol(args[0]);
599 }
600
601 static void create_snapshot2(const wstring& source, const wstring& fn) {
602 size_t found = fn.rfind(L"\\");
603 wstring path, file;
604 win_handle h, src;
605 btrfs_create_snapshot* bcs;
606 IO_STATUS_BLOCK iosb;
607
608 if (found == wstring::npos) {
609 path = L"";
610 file = fn;
611 } else {
612 path = fn.substr(0, found);
613 file = fn.substr(found + 1);
614 }
615 path += L"\\";
616
617 src = CreateFileW(source.c_str(), FILE_TRAVERSE, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, nullptr);
618 if (src == INVALID_HANDLE_VALUE)
619 return;
620
621 h = CreateFileW(path.c_str(), FILE_ADD_SUBDIRECTORY, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, nullptr);
622
623 if (h == INVALID_HANDLE_VALUE)
624 return;
625
626 size_t bcslen = offsetof(btrfs_create_snapshot, name[0]) + (file.length() * sizeof(WCHAR));
627 bcs = (btrfs_create_snapshot*)malloc(bcslen);
628
629 bcs->readonly = false;
630 bcs->posix = false;
631 bcs->namelen = (uint16_t)(file.length() * sizeof(WCHAR));
632 memcpy(bcs->name, file.c_str(), bcs->namelen);
633 bcs->subvol = src;
634
635 NtFsControlFile(h, nullptr, nullptr, nullptr, &iosb, FSCTL_BTRFS_CREATE_SNAPSHOT, bcs, (ULONG)bcslen, nullptr, 0);
636 }
637
638 extern "C" void CALLBACK CreateSnapshotW(HWND hwnd, HINSTANCE hinst, LPWSTR lpszCmdLine, int nCmdShow) {
639 vector<wstring> args;
640
641 command_line_to_args(lpszCmdLine, args);
642
643 if (args.size() >= 2)
644 create_snapshot2(args[0], args[1]);
645 }
646
647 void command_line_to_args(LPWSTR cmdline, vector<wstring>& args) {
648 LPWSTR* l;
649 int num_args;
650
651 args.clear();
652
653 l = CommandLineToArgvW(cmdline, &num_args);
654
655 if (!l)
656 return;
657
658 try {
659 args.reserve(num_args);
660
661 for (unsigned int i = 0; i < (unsigned int)num_args; i++) {
662 args.push_back(l[i]);
663 }
664 } catch (...) {
665 LocalFree(l);
666 throw;
667 }
668
669 LocalFree(l);
670 }
671
672 static string utf16_to_utf8(const wstring_view& utf16) {
673 string utf8;
674 char* buf;
675
676 if (utf16.empty())
677 return "";
678
679 auto utf8len = WideCharToMultiByte(CP_UTF8, 0, utf16.data(), static_cast<int>(utf16.length()), nullptr, 0, nullptr, nullptr);
680
681 if (utf8len == 0)
682 throw last_error(GetLastError());
683
684 buf = (char*)malloc(utf8len + sizeof(char));
685
686 if (!buf)
687 throw string_error(IDS_OUT_OF_MEMORY);
688
689 if (WideCharToMultiByte(CP_UTF8, 0, utf16.data(), static_cast<int>(utf16.length()), buf, utf8len, nullptr, nullptr) == 0) {
690 auto le = GetLastError();
691 free(buf);
692 throw last_error(le);
693 }
694
695 buf[utf8len] = 0;
696
697 utf8 = buf;
698
699 free(buf);
700
701 return utf8;
702 }
703
704 #ifdef _MSC_VER
705 #pragma warning(push)
706 #pragma warning(disable: 4996)
707 #endif
708
709 string_error::string_error(int resno, ...) {
710 wstring fmt, s;
711 int len;
712 va_list args;
713
714 if (!load_string(module, resno, fmt))
715 throw runtime_error("LoadString failed."); // FIXME
716
717 va_start(args, resno);
718 len = _vsnwprintf(nullptr, 0, fmt.c_str(), args);
719
720 if (len == 0)
721 s = L"";
722 else {
723 s.resize(len);
724 _vsnwprintf((wchar_t*)s.c_str(), len, fmt.c_str(), args);
725 }
726
727 va_end(args);
728
729 msg = utf16_to_utf8(s);
730 }
731
732 #ifdef _MSC_VER
733 #pragma warning(pop)
734 #endif
735
736 wstring utf8_to_utf16(const string_view& utf8) {
737 wstring ret;
738 WCHAR* buf;
739
740 if (utf8.empty())
741 return L"";
742
743 auto utf16len = MultiByteToWideChar(CP_UTF8, 0, utf8.data(), (int)utf8.length(), nullptr, 0);
744
745 if (utf16len == 0)
746 throw last_error(GetLastError());
747
748 buf = (WCHAR*)malloc((utf16len + 1) * sizeof(WCHAR));
749
750 if (!buf)
751 throw string_error(IDS_OUT_OF_MEMORY);
752
753 if (MultiByteToWideChar(CP_UTF8, 0, utf8.data(), (int)utf8.length(), buf, utf16len) == 0) {
754 auto le = GetLastError();
755 free(buf);
756 throw last_error(le);
757 }
758
759 buf[utf16len] = 0;
760
761 ret = buf;
762
763 free(buf);
764
765 return ret;
766 }
767
768 last_error::last_error(DWORD errnum) {
769 WCHAR* buf;
770
771 if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr,
772 errnum, 0, (WCHAR*)&buf, 0, nullptr) == 0)
773 throw runtime_error("FormatMessage failed");
774
775 try {
776 msg = utf16_to_utf8(buf);
777 } catch (...) {
778 LocalFree(buf);
779 throw;
780 }
781
782 LocalFree(buf);
783 }
784
785 void error_message(HWND hwnd, const char* msg) {
786 wstring title;
787
788 load_string(module, IDS_ERROR, title);
789
790 auto wmsg = utf8_to_utf16(msg);
791
792 MessageBoxW(hwnd, wmsg.c_str(), title.c_str(), MB_ICONERROR);
793 }
794
795 ntstatus_error::ntstatus_error(NTSTATUS Status) : Status(Status) {
796 _RtlNtStatusToDosError RtlNtStatusToDosError;
797 HMODULE ntdll = LoadLibraryW(L"ntdll.dll");
798 WCHAR* buf;
799
800 if (!ntdll)
801 throw runtime_error("Error loading ntdll.dll.");
802
803 try {
804 RtlNtStatusToDosError = (_RtlNtStatusToDosError)GetProcAddress(ntdll, "RtlNtStatusToDosError");
805
806 if (!RtlNtStatusToDosError)
807 throw runtime_error("Error loading RtlNtStatusToDosError in ntdll.dll.");
808
809 if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr,
810 RtlNtStatusToDosError(Status), 0, (WCHAR*)&buf, 0, nullptr) == 0)
811 throw runtime_error("FormatMessage failed");
812
813 try {
814 msg = utf16_to_utf8(buf);
815 } catch (...) {
816 LocalFree(buf);
817 throw;
818 }
819
820 LocalFree(buf);
821 } catch (...) {
822 FreeLibrary(ntdll);
823 throw;
824 }
825
826 FreeLibrary(ntdll);
827 }