github.com/maenmax/kairep@v0.0.0-20210218001208-55bf3df36788/src/golang.org/x/sys/windows/syscall_windows.go (about) 1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // Windows system calls. 6 7 package windows 8 9 import ( 10 errorspkg "errors" 11 "sync" 12 "syscall" 13 "unicode/utf16" 14 "unsafe" 15 ) 16 17 type Handle uintptr 18 19 const InvalidHandle = ^Handle(0) 20 21 // StringToUTF16 is deprecated. Use UTF16FromString instead. 22 // If s contains a NUL byte this function panics instead of 23 // returning an error. 24 func StringToUTF16(s string) []uint16 { 25 a, err := UTF16FromString(s) 26 if err != nil { 27 panic("windows: string with NUL passed to StringToUTF16") 28 } 29 return a 30 } 31 32 // UTF16FromString returns the UTF-16 encoding of the UTF-8 string 33 // s, with a terminating NUL added. If s contains a NUL byte at any 34 // location, it returns (nil, syscall.EINVAL). 35 func UTF16FromString(s string) ([]uint16, error) { 36 for i := 0; i < len(s); i++ { 37 if s[i] == 0 { 38 return nil, syscall.EINVAL 39 } 40 } 41 return utf16.Encode([]rune(s + "\x00")), nil 42 } 43 44 // UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s, 45 // with a terminating NUL removed. 46 func UTF16ToString(s []uint16) string { 47 for i, v := range s { 48 if v == 0 { 49 s = s[0:i] 50 break 51 } 52 } 53 return string(utf16.Decode(s)) 54 } 55 56 // StringToUTF16Ptr is deprecated. Use UTF16PtrFromString instead. 57 // If s contains a NUL byte this function panics instead of 58 // returning an error. 59 func StringToUTF16Ptr(s string) *uint16 { return &StringToUTF16(s)[0] } 60 61 // UTF16PtrFromString returns pointer to the UTF-16 encoding of 62 // the UTF-8 string s, with a terminating NUL added. If s 63 // contains a NUL byte at any location, it returns (nil, syscall.EINVAL). 64 func UTF16PtrFromString(s string) (*uint16, error) { 65 a, err := UTF16FromString(s) 66 if err != nil { 67 return nil, err 68 } 69 return &a[0], nil 70 } 71 72 func Getpagesize() int { return 4096 } 73 74 // Converts a Go function to a function pointer conforming 75 // to the stdcall or cdecl calling convention. This is useful when 76 // interoperating with Windows code requiring callbacks. 77 // Implemented in runtime/syscall_windows.goc 78 func NewCallback(fn interface{}) uintptr 79 func NewCallbackCDecl(fn interface{}) uintptr 80 81 // windows api calls 82 83 //sys GetLastError() (lasterr error) 84 //sys LoadLibrary(libname string) (handle Handle, err error) = LoadLibraryW 85 //sys LoadLibraryEx(libname string, zero Handle, flags uintptr) (handle Handle, err error) = LoadLibraryExW 86 //sys FreeLibrary(handle Handle) (err error) 87 //sys GetProcAddress(module Handle, procname string) (proc uintptr, err error) 88 //sys GetVersion() (ver uint32, err error) 89 //sys FormatMessage(flags uint32, msgsrc uintptr, msgid uint32, langid uint32, buf []uint16, args *byte) (n uint32, err error) = FormatMessageW 90 //sys ExitProcess(exitcode uint32) 91 //sys CreateFile(name *uint16, access uint32, mode uint32, sa *SecurityAttributes, createmode uint32, attrs uint32, templatefile int32) (handle Handle, err error) [failretval==InvalidHandle] = CreateFileW 92 //sys ReadFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error) 93 //sys WriteFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error) 94 //sys SetFilePointer(handle Handle, lowoffset int32, highoffsetptr *int32, whence uint32) (newlowoffset uint32, err error) [failretval==0xffffffff] 95 //sys CloseHandle(handle Handle) (err error) 96 //sys GetStdHandle(stdhandle int) (handle Handle, err error) [failretval==InvalidHandle] 97 //sys findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstFileW 98 //sys findNextFile1(handle Handle, data *win32finddata1) (err error) = FindNextFileW 99 //sys FindClose(handle Handle) (err error) 100 //sys GetFileInformationByHandle(handle Handle, data *ByHandleFileInformation) (err error) 101 //sys GetCurrentDirectory(buflen uint32, buf *uint16) (n uint32, err error) = GetCurrentDirectoryW 102 //sys SetCurrentDirectory(path *uint16) (err error) = SetCurrentDirectoryW 103 //sys CreateDirectory(path *uint16, sa *SecurityAttributes) (err error) = CreateDirectoryW 104 //sys RemoveDirectory(path *uint16) (err error) = RemoveDirectoryW 105 //sys DeleteFile(path *uint16) (err error) = DeleteFileW 106 //sys MoveFile(from *uint16, to *uint16) (err error) = MoveFileW 107 //sys MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW 108 //sys GetComputerName(buf *uint16, n *uint32) (err error) = GetComputerNameW 109 //sys GetComputerNameEx(nametype uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW 110 //sys SetEndOfFile(handle Handle) (err error) 111 //sys GetSystemTimeAsFileTime(time *Filetime) 112 //sys GetTimeZoneInformation(tzi *Timezoneinformation) (rc uint32, err error) [failretval==0xffffffff] 113 //sys CreateIoCompletionPort(filehandle Handle, cphandle Handle, key uint32, threadcnt uint32) (handle Handle, err error) 114 //sys GetQueuedCompletionStatus(cphandle Handle, qty *uint32, key *uint32, overlapped **Overlapped, timeout uint32) (err error) 115 //sys PostQueuedCompletionStatus(cphandle Handle, qty uint32, key uint32, overlapped *Overlapped) (err error) 116 //sys CancelIo(s Handle) (err error) 117 //sys CancelIoEx(s Handle, o *Overlapped) (err error) 118 //sys CreateProcess(appName *uint16, commandLine *uint16, procSecurity *SecurityAttributes, threadSecurity *SecurityAttributes, inheritHandles bool, creationFlags uint32, env *uint16, currentDir *uint16, startupInfo *StartupInfo, outProcInfo *ProcessInformation) (err error) = CreateProcessW 119 //sys OpenProcess(da uint32, inheritHandle bool, pid uint32) (handle Handle, err error) 120 //sys TerminateProcess(handle Handle, exitcode uint32) (err error) 121 //sys GetExitCodeProcess(handle Handle, exitcode *uint32) (err error) 122 //sys GetStartupInfo(startupInfo *StartupInfo) (err error) = GetStartupInfoW 123 //sys GetCurrentProcess() (pseudoHandle Handle, err error) 124 //sys GetProcessTimes(handle Handle, creationTime *Filetime, exitTime *Filetime, kernelTime *Filetime, userTime *Filetime) (err error) 125 //sys DuplicateHandle(hSourceProcessHandle Handle, hSourceHandle Handle, hTargetProcessHandle Handle, lpTargetHandle *Handle, dwDesiredAccess uint32, bInheritHandle bool, dwOptions uint32) (err error) 126 //sys WaitForSingleObject(handle Handle, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff] 127 //sys GetTempPath(buflen uint32, buf *uint16) (n uint32, err error) = GetTempPathW 128 //sys CreatePipe(readhandle *Handle, writehandle *Handle, sa *SecurityAttributes, size uint32) (err error) 129 //sys GetFileType(filehandle Handle) (n uint32, err error) 130 //sys CryptAcquireContext(provhandle *Handle, container *uint16, provider *uint16, provtype uint32, flags uint32) (err error) = advapi32.CryptAcquireContextW 131 //sys CryptReleaseContext(provhandle Handle, flags uint32) (err error) = advapi32.CryptReleaseContext 132 //sys CryptGenRandom(provhandle Handle, buflen uint32, buf *byte) (err error) = advapi32.CryptGenRandom 133 //sys GetEnvironmentStrings() (envs *uint16, err error) [failretval==nil] = kernel32.GetEnvironmentStringsW 134 //sys FreeEnvironmentStrings(envs *uint16) (err error) = kernel32.FreeEnvironmentStringsW 135 //sys GetEnvironmentVariable(name *uint16, buffer *uint16, size uint32) (n uint32, err error) = kernel32.GetEnvironmentVariableW 136 //sys SetEnvironmentVariable(name *uint16, value *uint16) (err error) = kernel32.SetEnvironmentVariableW 137 //sys SetFileTime(handle Handle, ctime *Filetime, atime *Filetime, wtime *Filetime) (err error) 138 //sys GetFileAttributes(name *uint16) (attrs uint32, err error) [failretval==INVALID_FILE_ATTRIBUTES] = kernel32.GetFileAttributesW 139 //sys SetFileAttributes(name *uint16, attrs uint32) (err error) = kernel32.SetFileAttributesW 140 //sys GetFileAttributesEx(name *uint16, level uint32, info *byte) (err error) = kernel32.GetFileAttributesExW 141 //sys GetCommandLine() (cmd *uint16) = kernel32.GetCommandLineW 142 //sys CommandLineToArgv(cmd *uint16, argc *int32) (argv *[8192]*[8192]uint16, err error) [failretval==nil] = shell32.CommandLineToArgvW 143 //sys LocalFree(hmem Handle) (handle Handle, err error) [failretval!=0] 144 //sys SetHandleInformation(handle Handle, mask uint32, flags uint32) (err error) 145 //sys FlushFileBuffers(handle Handle) (err error) 146 //sys GetFullPathName(path *uint16, buflen uint32, buf *uint16, fname **uint16) (n uint32, err error) = kernel32.GetFullPathNameW 147 //sys GetLongPathName(path *uint16, buf *uint16, buflen uint32) (n uint32, err error) = kernel32.GetLongPathNameW 148 //sys GetShortPathName(longpath *uint16, shortpath *uint16, buflen uint32) (n uint32, err error) = kernel32.GetShortPathNameW 149 //sys CreateFileMapping(fhandle Handle, sa *SecurityAttributes, prot uint32, maxSizeHigh uint32, maxSizeLow uint32, name *uint16) (handle Handle, err error) = kernel32.CreateFileMappingW 150 //sys MapViewOfFile(handle Handle, access uint32, offsetHigh uint32, offsetLow uint32, length uintptr) (addr uintptr, err error) 151 //sys UnmapViewOfFile(addr uintptr) (err error) 152 //sys FlushViewOfFile(addr uintptr, length uintptr) (err error) 153 //sys VirtualLock(addr uintptr, length uintptr) (err error) 154 //sys VirtualUnlock(addr uintptr, length uintptr) (err error) 155 //sys TransmitFile(s Handle, handle Handle, bytesToWrite uint32, bytsPerSend uint32, overlapped *Overlapped, transmitFileBuf *TransmitFileBuffers, flags uint32) (err error) = mswsock.TransmitFile 156 //sys ReadDirectoryChanges(handle Handle, buf *byte, buflen uint32, watchSubTree bool, mask uint32, retlen *uint32, overlapped *Overlapped, completionRoutine uintptr) (err error) = kernel32.ReadDirectoryChangesW 157 //sys CertOpenSystemStore(hprov Handle, name *uint16) (store Handle, err error) = crypt32.CertOpenSystemStoreW 158 //sys CertOpenStore(storeProvider uintptr, msgAndCertEncodingType uint32, cryptProv uintptr, flags uint32, para uintptr) (handle Handle, err error) [failretval==InvalidHandle] = crypt32.CertOpenStore 159 //sys CertEnumCertificatesInStore(store Handle, prevContext *CertContext) (context *CertContext, err error) [failretval==nil] = crypt32.CertEnumCertificatesInStore 160 //sys CertAddCertificateContextToStore(store Handle, certContext *CertContext, addDisposition uint32, storeContext **CertContext) (err error) = crypt32.CertAddCertificateContextToStore 161 //sys CertCloseStore(store Handle, flags uint32) (err error) = crypt32.CertCloseStore 162 //sys CertGetCertificateChain(engine Handle, leaf *CertContext, time *Filetime, additionalStore Handle, para *CertChainPara, flags uint32, reserved uintptr, chainCtx **CertChainContext) (err error) = crypt32.CertGetCertificateChain 163 //sys CertFreeCertificateChain(ctx *CertChainContext) = crypt32.CertFreeCertificateChain 164 //sys CertCreateCertificateContext(certEncodingType uint32, certEncoded *byte, encodedLen uint32) (context *CertContext, err error) [failretval==nil] = crypt32.CertCreateCertificateContext 165 //sys CertFreeCertificateContext(ctx *CertContext) (err error) = crypt32.CertFreeCertificateContext 166 //sys CertVerifyCertificateChainPolicy(policyOID uintptr, chain *CertChainContext, para *CertChainPolicyPara, status *CertChainPolicyStatus) (err error) = crypt32.CertVerifyCertificateChainPolicy 167 //sys RegOpenKeyEx(key Handle, subkey *uint16, options uint32, desiredAccess uint32, result *Handle) (regerrno error) = advapi32.RegOpenKeyExW 168 //sys RegCloseKey(key Handle) (regerrno error) = advapi32.RegCloseKey 169 //sys RegQueryInfoKey(key Handle, class *uint16, classLen *uint32, reserved *uint32, subkeysLen *uint32, maxSubkeyLen *uint32, maxClassLen *uint32, valuesLen *uint32, maxValueNameLen *uint32, maxValueLen *uint32, saLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegQueryInfoKeyW 170 //sys RegEnumKeyEx(key Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, class *uint16, classLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegEnumKeyExW 171 //sys RegQueryValueEx(key Handle, name *uint16, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) = advapi32.RegQueryValueExW 172 //sys getCurrentProcessId() (pid uint32) = kernel32.GetCurrentProcessId 173 //sys GetConsoleMode(console Handle, mode *uint32) (err error) = kernel32.GetConsoleMode 174 //sys WriteConsole(console Handle, buf *uint16, towrite uint32, written *uint32, reserved *byte) (err error) = kernel32.WriteConsoleW 175 //sys ReadConsole(console Handle, buf *uint16, toread uint32, read *uint32, inputControl *byte) (err error) = kernel32.ReadConsoleW 176 //sys CreateToolhelp32Snapshot(flags uint32, processId uint32) (handle Handle, err error) [failretval==InvalidHandle] = kernel32.CreateToolhelp32Snapshot 177 //sys Process32First(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32FirstW 178 //sys Process32Next(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32NextW 179 //sys DeviceIoControl(handle Handle, ioControlCode uint32, inBuffer *byte, inBufferSize uint32, outBuffer *byte, outBufferSize uint32, bytesReturned *uint32, overlapped *Overlapped) (err error) 180 // This function returns 1 byte BOOLEAN rather than the 4 byte BOOL. 181 //sys CreateSymbolicLink(symlinkfilename *uint16, targetfilename *uint16, flags uint32) (err error) [failretval&0xff==0] = CreateSymbolicLinkW 182 //sys CreateHardLink(filename *uint16, existingfilename *uint16, reserved uintptr) (err error) [failretval&0xff==0] = CreateHardLinkW 183 //sys GetCurrentThreadId() (id uint32) 184 //sys CreateEvent(eventAttrs *syscall.SecurityAttributes, manualReset uint32, initialState uint32, name *uint16) (handle Handle, err error) = kernel32.CreateEventW 185 //sys SetEvent(event Handle) (err error) = kernel32.SetEvent 186 187 // syscall interface implementation for other packages 188 189 func Exit(code int) { ExitProcess(uint32(code)) } 190 191 func makeInheritSa() *SecurityAttributes { 192 var sa SecurityAttributes 193 sa.Length = uint32(unsafe.Sizeof(sa)) 194 sa.InheritHandle = 1 195 return &sa 196 } 197 198 func Open(path string, mode int, perm uint32) (fd Handle, err error) { 199 if len(path) == 0 { 200 return InvalidHandle, ERROR_FILE_NOT_FOUND 201 } 202 pathp, err := UTF16PtrFromString(path) 203 if err != nil { 204 return InvalidHandle, err 205 } 206 var access uint32 207 switch mode & (O_RDONLY | O_WRONLY | O_RDWR) { 208 case O_RDONLY: 209 access = GENERIC_READ 210 case O_WRONLY: 211 access = GENERIC_WRITE 212 case O_RDWR: 213 access = GENERIC_READ | GENERIC_WRITE 214 } 215 if mode&O_CREAT != 0 { 216 access |= GENERIC_WRITE 217 } 218 if mode&O_APPEND != 0 { 219 access &^= GENERIC_WRITE 220 access |= FILE_APPEND_DATA 221 } 222 sharemode := uint32(FILE_SHARE_READ | FILE_SHARE_WRITE) 223 var sa *SecurityAttributes 224 if mode&O_CLOEXEC == 0 { 225 sa = makeInheritSa() 226 } 227 var createmode uint32 228 switch { 229 case mode&(O_CREAT|O_EXCL) == (O_CREAT | O_EXCL): 230 createmode = CREATE_NEW 231 case mode&(O_CREAT|O_TRUNC) == (O_CREAT | O_TRUNC): 232 createmode = CREATE_ALWAYS 233 case mode&O_CREAT == O_CREAT: 234 createmode = OPEN_ALWAYS 235 case mode&O_TRUNC == O_TRUNC: 236 createmode = TRUNCATE_EXISTING 237 default: 238 createmode = OPEN_EXISTING 239 } 240 h, e := CreateFile(pathp, access, sharemode, sa, createmode, FILE_ATTRIBUTE_NORMAL, 0) 241 return h, e 242 } 243 244 func Read(fd Handle, p []byte) (n int, err error) { 245 var done uint32 246 e := ReadFile(fd, p, &done, nil) 247 if e != nil { 248 if e == ERROR_BROKEN_PIPE { 249 // NOTE(brainman): work around ERROR_BROKEN_PIPE is returned on reading EOF from stdin 250 return 0, nil 251 } 252 return 0, e 253 } 254 if raceenabled { 255 if done > 0 { 256 raceWriteRange(unsafe.Pointer(&p[0]), int(done)) 257 } 258 raceAcquire(unsafe.Pointer(&ioSync)) 259 } 260 return int(done), nil 261 } 262 263 func Write(fd Handle, p []byte) (n int, err error) { 264 if raceenabled { 265 raceReleaseMerge(unsafe.Pointer(&ioSync)) 266 } 267 var done uint32 268 e := WriteFile(fd, p, &done, nil) 269 if e != nil { 270 return 0, e 271 } 272 if raceenabled && done > 0 { 273 raceReadRange(unsafe.Pointer(&p[0]), int(done)) 274 } 275 return int(done), nil 276 } 277 278 var ioSync int64 279 280 func Seek(fd Handle, offset int64, whence int) (newoffset int64, err error) { 281 var w uint32 282 switch whence { 283 case 0: 284 w = FILE_BEGIN 285 case 1: 286 w = FILE_CURRENT 287 case 2: 288 w = FILE_END 289 } 290 hi := int32(offset >> 32) 291 lo := int32(offset) 292 // use GetFileType to check pipe, pipe can't do seek 293 ft, _ := GetFileType(fd) 294 if ft == FILE_TYPE_PIPE { 295 return 0, syscall.EPIPE 296 } 297 rlo, e := SetFilePointer(fd, lo, &hi, w) 298 if e != nil { 299 return 0, e 300 } 301 return int64(hi)<<32 + int64(rlo), nil 302 } 303 304 func Close(fd Handle) (err error) { 305 return CloseHandle(fd) 306 } 307 308 var ( 309 Stdin = getStdHandle(STD_INPUT_HANDLE) 310 Stdout = getStdHandle(STD_OUTPUT_HANDLE) 311 Stderr = getStdHandle(STD_ERROR_HANDLE) 312 ) 313 314 func getStdHandle(h int) (fd Handle) { 315 r, _ := GetStdHandle(h) 316 CloseOnExec(r) 317 return r 318 } 319 320 const ImplementsGetwd = true 321 322 func Getwd() (wd string, err error) { 323 b := make([]uint16, 300) 324 n, e := GetCurrentDirectory(uint32(len(b)), &b[0]) 325 if e != nil { 326 return "", e 327 } 328 return string(utf16.Decode(b[0:n])), nil 329 } 330 331 func Chdir(path string) (err error) { 332 pathp, err := UTF16PtrFromString(path) 333 if err != nil { 334 return err 335 } 336 return SetCurrentDirectory(pathp) 337 } 338 339 func Mkdir(path string, mode uint32) (err error) { 340 pathp, err := UTF16PtrFromString(path) 341 if err != nil { 342 return err 343 } 344 return CreateDirectory(pathp, nil) 345 } 346 347 func Rmdir(path string) (err error) { 348 pathp, err := UTF16PtrFromString(path) 349 if err != nil { 350 return err 351 } 352 return RemoveDirectory(pathp) 353 } 354 355 func Unlink(path string) (err error) { 356 pathp, err := UTF16PtrFromString(path) 357 if err != nil { 358 return err 359 } 360 return DeleteFile(pathp) 361 } 362 363 func Rename(oldpath, newpath string) (err error) { 364 from, err := UTF16PtrFromString(oldpath) 365 if err != nil { 366 return err 367 } 368 to, err := UTF16PtrFromString(newpath) 369 if err != nil { 370 return err 371 } 372 return MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING) 373 } 374 375 func ComputerName() (name string, err error) { 376 var n uint32 = MAX_COMPUTERNAME_LENGTH + 1 377 b := make([]uint16, n) 378 e := GetComputerName(&b[0], &n) 379 if e != nil { 380 return "", e 381 } 382 return string(utf16.Decode(b[0:n])), nil 383 } 384 385 func Ftruncate(fd Handle, length int64) (err error) { 386 curoffset, e := Seek(fd, 0, 1) 387 if e != nil { 388 return e 389 } 390 defer Seek(fd, curoffset, 0) 391 _, e = Seek(fd, length, 0) 392 if e != nil { 393 return e 394 } 395 e = SetEndOfFile(fd) 396 if e != nil { 397 return e 398 } 399 return nil 400 } 401 402 func Gettimeofday(tv *Timeval) (err error) { 403 var ft Filetime 404 GetSystemTimeAsFileTime(&ft) 405 *tv = NsecToTimeval(ft.Nanoseconds()) 406 return nil 407 } 408 409 func Pipe(p []Handle) (err error) { 410 if len(p) != 2 { 411 return syscall.EINVAL 412 } 413 var r, w Handle 414 e := CreatePipe(&r, &w, makeInheritSa(), 0) 415 if e != nil { 416 return e 417 } 418 p[0] = r 419 p[1] = w 420 return nil 421 } 422 423 func Utimes(path string, tv []Timeval) (err error) { 424 if len(tv) != 2 { 425 return syscall.EINVAL 426 } 427 pathp, e := UTF16PtrFromString(path) 428 if e != nil { 429 return e 430 } 431 h, e := CreateFile(pathp, 432 FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil, 433 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0) 434 if e != nil { 435 return e 436 } 437 defer Close(h) 438 a := NsecToFiletime(tv[0].Nanoseconds()) 439 w := NsecToFiletime(tv[1].Nanoseconds()) 440 return SetFileTime(h, nil, &a, &w) 441 } 442 443 func UtimesNano(path string, ts []Timespec) (err error) { 444 if len(ts) != 2 { 445 return syscall.EINVAL 446 } 447 pathp, e := UTF16PtrFromString(path) 448 if e != nil { 449 return e 450 } 451 h, e := CreateFile(pathp, 452 FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil, 453 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0) 454 if e != nil { 455 return e 456 } 457 defer Close(h) 458 a := NsecToFiletime(TimespecToNsec(ts[0])) 459 w := NsecToFiletime(TimespecToNsec(ts[1])) 460 return SetFileTime(h, nil, &a, &w) 461 } 462 463 func Fsync(fd Handle) (err error) { 464 return FlushFileBuffers(fd) 465 } 466 467 func Chmod(path string, mode uint32) (err error) { 468 if mode == 0 { 469 return syscall.EINVAL 470 } 471 p, e := UTF16PtrFromString(path) 472 if e != nil { 473 return e 474 } 475 attrs, e := GetFileAttributes(p) 476 if e != nil { 477 return e 478 } 479 if mode&S_IWRITE != 0 { 480 attrs &^= FILE_ATTRIBUTE_READONLY 481 } else { 482 attrs |= FILE_ATTRIBUTE_READONLY 483 } 484 return SetFileAttributes(p, attrs) 485 } 486 487 func LoadCancelIoEx() error { 488 return procCancelIoEx.Find() 489 } 490 491 func LoadSetFileCompletionNotificationModes() error { 492 return procSetFileCompletionNotificationModes.Find() 493 } 494 495 // net api calls 496 497 const socket_error = uintptr(^uint32(0)) 498 499 //sys WSAStartup(verreq uint32, data *WSAData) (sockerr error) = ws2_32.WSAStartup 500 //sys WSACleanup() (err error) [failretval==socket_error] = ws2_32.WSACleanup 501 //sys WSAIoctl(s Handle, iocc uint32, inbuf *byte, cbif uint32, outbuf *byte, cbob uint32, cbbr *uint32, overlapped *Overlapped, completionRoutine uintptr) (err error) [failretval==socket_error] = ws2_32.WSAIoctl 502 //sys socket(af int32, typ int32, protocol int32) (handle Handle, err error) [failretval==InvalidHandle] = ws2_32.socket 503 //sys Setsockopt(s Handle, level int32, optname int32, optval *byte, optlen int32) (err error) [failretval==socket_error] = ws2_32.setsockopt 504 //sys Getsockopt(s Handle, level int32, optname int32, optval *byte, optlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockopt 505 //sys bind(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.bind 506 //sys connect(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.connect 507 //sys getsockname(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockname 508 //sys getpeername(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getpeername 509 //sys listen(s Handle, backlog int32) (err error) [failretval==socket_error] = ws2_32.listen 510 //sys shutdown(s Handle, how int32) (err error) [failretval==socket_error] = ws2_32.shutdown 511 //sys Closesocket(s Handle) (err error) [failretval==socket_error] = ws2_32.closesocket 512 //sys AcceptEx(ls Handle, as Handle, buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, recvd *uint32, overlapped *Overlapped) (err error) = mswsock.AcceptEx 513 //sys GetAcceptExSockaddrs(buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, lrsa **RawSockaddrAny, lrsalen *int32, rrsa **RawSockaddrAny, rrsalen *int32) = mswsock.GetAcceptExSockaddrs 514 //sys WSARecv(s Handle, bufs *WSABuf, bufcnt uint32, recvd *uint32, flags *uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSARecv 515 //sys WSASend(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSASend 516 //sys WSARecvFrom(s Handle, bufs *WSABuf, bufcnt uint32, recvd *uint32, flags *uint32, from *RawSockaddrAny, fromlen *int32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSARecvFrom 517 //sys WSASendTo(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to *RawSockaddrAny, tolen int32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSASendTo 518 //sys GetHostByName(name string) (h *Hostent, err error) [failretval==nil] = ws2_32.gethostbyname 519 //sys GetServByName(name string, proto string) (s *Servent, err error) [failretval==nil] = ws2_32.getservbyname 520 //sys Ntohs(netshort uint16) (u uint16) = ws2_32.ntohs 521 //sys GetProtoByName(name string) (p *Protoent, err error) [failretval==nil] = ws2_32.getprotobyname 522 //sys DnsQuery(name string, qtype uint16, options uint32, extra *byte, qrs **DNSRecord, pr *byte) (status error) = dnsapi.DnsQuery_W 523 //sys DnsRecordListFree(rl *DNSRecord, freetype uint32) = dnsapi.DnsRecordListFree 524 //sys DnsNameCompare(name1 *uint16, name2 *uint16) (same bool) = dnsapi.DnsNameCompare_W 525 //sys GetAddrInfoW(nodename *uint16, servicename *uint16, hints *AddrinfoW, result **AddrinfoW) (sockerr error) = ws2_32.GetAddrInfoW 526 //sys FreeAddrInfoW(addrinfo *AddrinfoW) = ws2_32.FreeAddrInfoW 527 //sys GetIfEntry(pIfRow *MibIfRow) (errcode error) = iphlpapi.GetIfEntry 528 //sys GetAdaptersInfo(ai *IpAdapterInfo, ol *uint32) (errcode error) = iphlpapi.GetAdaptersInfo 529 //sys SetFileCompletionNotificationModes(handle Handle, flags uint8) (err error) = kernel32.SetFileCompletionNotificationModes 530 //sys WSAEnumProtocols(protocols *int32, protocolBuffer *WSAProtocolInfo, bufferLength *uint32) (n int32, err error) [failretval==-1] = ws2_32.WSAEnumProtocolsW 531 //sys GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses 532 //sys GetACP() (acp uint32) = kernel32.GetACP 533 //sys MultiByteToWideChar(codePage uint32, dwFlags uint32, str *byte, nstr int32, wchar *uint16, nwchar int32) (nwrite int32, err error) = kernel32.MultiByteToWideChar 534 535 // For testing: clients can set this flag to force 536 // creation of IPv6 sockets to return EAFNOSUPPORT. 537 var SocketDisableIPv6 bool 538 539 type RawSockaddrInet4 struct { 540 Family uint16 541 Port uint16 542 Addr [4]byte /* in_addr */ 543 Zero [8]uint8 544 } 545 546 type RawSockaddrInet6 struct { 547 Family uint16 548 Port uint16 549 Flowinfo uint32 550 Addr [16]byte /* in6_addr */ 551 Scope_id uint32 552 } 553 554 type RawSockaddr struct { 555 Family uint16 556 Data [14]int8 557 } 558 559 type RawSockaddrAny struct { 560 Addr RawSockaddr 561 Pad [96]int8 562 } 563 564 type Sockaddr interface { 565 sockaddr() (ptr unsafe.Pointer, len int32, err error) // lowercase; only we can define Sockaddrs 566 } 567 568 type SockaddrInet4 struct { 569 Port int 570 Addr [4]byte 571 raw RawSockaddrInet4 572 } 573 574 func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, int32, error) { 575 if sa.Port < 0 || sa.Port > 0xFFFF { 576 return nil, 0, syscall.EINVAL 577 } 578 sa.raw.Family = AF_INET 579 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) 580 p[0] = byte(sa.Port >> 8) 581 p[1] = byte(sa.Port) 582 for i := 0; i < len(sa.Addr); i++ { 583 sa.raw.Addr[i] = sa.Addr[i] 584 } 585 return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil 586 } 587 588 type SockaddrInet6 struct { 589 Port int 590 ZoneId uint32 591 Addr [16]byte 592 raw RawSockaddrInet6 593 } 594 595 func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, int32, error) { 596 if sa.Port < 0 || sa.Port > 0xFFFF { 597 return nil, 0, syscall.EINVAL 598 } 599 sa.raw.Family = AF_INET6 600 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) 601 p[0] = byte(sa.Port >> 8) 602 p[1] = byte(sa.Port) 603 sa.raw.Scope_id = sa.ZoneId 604 for i := 0; i < len(sa.Addr); i++ { 605 sa.raw.Addr[i] = sa.Addr[i] 606 } 607 return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil 608 } 609 610 type SockaddrUnix struct { 611 Name string 612 } 613 614 func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, int32, error) { 615 // TODO(brainman): implement SockaddrUnix.sockaddr() 616 return nil, 0, syscall.EWINDOWS 617 } 618 619 func (rsa *RawSockaddrAny) Sockaddr() (Sockaddr, error) { 620 switch rsa.Addr.Family { 621 case AF_UNIX: 622 return nil, syscall.EWINDOWS 623 624 case AF_INET: 625 pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) 626 sa := new(SockaddrInet4) 627 p := (*[2]byte)(unsafe.Pointer(&pp.Port)) 628 sa.Port = int(p[0])<<8 + int(p[1]) 629 for i := 0; i < len(sa.Addr); i++ { 630 sa.Addr[i] = pp.Addr[i] 631 } 632 return sa, nil 633 634 case AF_INET6: 635 pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) 636 sa := new(SockaddrInet6) 637 p := (*[2]byte)(unsafe.Pointer(&pp.Port)) 638 sa.Port = int(p[0])<<8 + int(p[1]) 639 sa.ZoneId = pp.Scope_id 640 for i := 0; i < len(sa.Addr); i++ { 641 sa.Addr[i] = pp.Addr[i] 642 } 643 return sa, nil 644 } 645 return nil, syscall.EAFNOSUPPORT 646 } 647 648 func Socket(domain, typ, proto int) (fd Handle, err error) { 649 if domain == AF_INET6 && SocketDisableIPv6 { 650 return InvalidHandle, syscall.EAFNOSUPPORT 651 } 652 return socket(int32(domain), int32(typ), int32(proto)) 653 } 654 655 func SetsockoptInt(fd Handle, level, opt int, value int) (err error) { 656 v := int32(value) 657 return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&v)), int32(unsafe.Sizeof(v))) 658 } 659 660 func Bind(fd Handle, sa Sockaddr) (err error) { 661 ptr, n, err := sa.sockaddr() 662 if err != nil { 663 return err 664 } 665 return bind(fd, ptr, n) 666 } 667 668 func Connect(fd Handle, sa Sockaddr) (err error) { 669 ptr, n, err := sa.sockaddr() 670 if err != nil { 671 return err 672 } 673 return connect(fd, ptr, n) 674 } 675 676 func Getsockname(fd Handle) (sa Sockaddr, err error) { 677 var rsa RawSockaddrAny 678 l := int32(unsafe.Sizeof(rsa)) 679 if err = getsockname(fd, &rsa, &l); err != nil { 680 return 681 } 682 return rsa.Sockaddr() 683 } 684 685 func Getpeername(fd Handle) (sa Sockaddr, err error) { 686 var rsa RawSockaddrAny 687 l := int32(unsafe.Sizeof(rsa)) 688 if err = getpeername(fd, &rsa, &l); err != nil { 689 return 690 } 691 return rsa.Sockaddr() 692 } 693 694 func Listen(s Handle, n int) (err error) { 695 return listen(s, int32(n)) 696 } 697 698 func Shutdown(fd Handle, how int) (err error) { 699 return shutdown(fd, int32(how)) 700 } 701 702 func WSASendto(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to Sockaddr, overlapped *Overlapped, croutine *byte) (err error) { 703 rsa, l, err := to.sockaddr() 704 if err != nil { 705 return err 706 } 707 return WSASendTo(s, bufs, bufcnt, sent, flags, (*RawSockaddrAny)(unsafe.Pointer(rsa)), l, overlapped, croutine) 708 } 709 710 func LoadGetAddrInfo() error { 711 return procGetAddrInfoW.Find() 712 } 713 714 var connectExFunc struct { 715 once sync.Once 716 addr uintptr 717 err error 718 } 719 720 func LoadConnectEx() error { 721 connectExFunc.once.Do(func() { 722 var s Handle 723 s, connectExFunc.err = Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP) 724 if connectExFunc.err != nil { 725 return 726 } 727 defer CloseHandle(s) 728 var n uint32 729 connectExFunc.err = WSAIoctl(s, 730 SIO_GET_EXTENSION_FUNCTION_POINTER, 731 (*byte)(unsafe.Pointer(&WSAID_CONNECTEX)), 732 uint32(unsafe.Sizeof(WSAID_CONNECTEX)), 733 (*byte)(unsafe.Pointer(&connectExFunc.addr)), 734 uint32(unsafe.Sizeof(connectExFunc.addr)), 735 &n, nil, 0) 736 }) 737 return connectExFunc.err 738 } 739 740 func connectEx(s Handle, name unsafe.Pointer, namelen int32, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) (err error) { 741 r1, _, e1 := syscall.Syscall9(connectExFunc.addr, 7, uintptr(s), uintptr(name), uintptr(namelen), uintptr(unsafe.Pointer(sendBuf)), uintptr(sendDataLen), uintptr(unsafe.Pointer(bytesSent)), uintptr(unsafe.Pointer(overlapped)), 0, 0) 742 if r1 == 0 { 743 if e1 != 0 { 744 err = error(e1) 745 } else { 746 err = syscall.EINVAL 747 } 748 } 749 return 750 } 751 752 func ConnectEx(fd Handle, sa Sockaddr, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) error { 753 err := LoadConnectEx() 754 if err != nil { 755 return errorspkg.New("failed to find ConnectEx: " + err.Error()) 756 } 757 ptr, n, err := sa.sockaddr() 758 if err != nil { 759 return err 760 } 761 return connectEx(fd, ptr, n, sendBuf, sendDataLen, bytesSent, overlapped) 762 } 763 764 // Invented structures to support what package os expects. 765 type Rusage struct { 766 CreationTime Filetime 767 ExitTime Filetime 768 KernelTime Filetime 769 UserTime Filetime 770 } 771 772 type WaitStatus struct { 773 ExitCode uint32 774 } 775 776 func (w WaitStatus) Exited() bool { return true } 777 778 func (w WaitStatus) ExitStatus() int { return int(w.ExitCode) } 779 780 func (w WaitStatus) Signal() Signal { return -1 } 781 782 func (w WaitStatus) CoreDump() bool { return false } 783 784 func (w WaitStatus) Stopped() bool { return false } 785 786 func (w WaitStatus) Continued() bool { return false } 787 788 func (w WaitStatus) StopSignal() Signal { return -1 } 789 790 func (w WaitStatus) Signaled() bool { return false } 791 792 func (w WaitStatus) TrapCause() int { return -1 } 793 794 // Timespec is an invented structure on Windows, but here for 795 // consistency with the corresponding package for other operating systems. 796 type Timespec struct { 797 Sec int64 798 Nsec int64 799 } 800 801 func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) } 802 803 func NsecToTimespec(nsec int64) (ts Timespec) { 804 ts.Sec = nsec / 1e9 805 ts.Nsec = nsec % 1e9 806 return 807 } 808 809 // TODO(brainman): fix all needed for net 810 811 func Accept(fd Handle) (nfd Handle, sa Sockaddr, err error) { return 0, nil, syscall.EWINDOWS } 812 func Recvfrom(fd Handle, p []byte, flags int) (n int, from Sockaddr, err error) { 813 return 0, nil, syscall.EWINDOWS 814 } 815 func Sendto(fd Handle, p []byte, flags int, to Sockaddr) (err error) { return syscall.EWINDOWS } 816 func SetsockoptTimeval(fd Handle, level, opt int, tv *Timeval) (err error) { return syscall.EWINDOWS } 817 818 // The Linger struct is wrong but we only noticed after Go 1. 819 // sysLinger is the real system call structure. 820 821 // BUG(brainman): The definition of Linger is not appropriate for direct use 822 // with Setsockopt and Getsockopt. 823 // Use SetsockoptLinger instead. 824 825 type Linger struct { 826 Onoff int32 827 Linger int32 828 } 829 830 type sysLinger struct { 831 Onoff uint16 832 Linger uint16 833 } 834 835 type IPMreq struct { 836 Multiaddr [4]byte /* in_addr */ 837 Interface [4]byte /* in_addr */ 838 } 839 840 type IPv6Mreq struct { 841 Multiaddr [16]byte /* in6_addr */ 842 Interface uint32 843 } 844 845 func GetsockoptInt(fd Handle, level, opt int) (int, error) { return -1, syscall.EWINDOWS } 846 847 func SetsockoptLinger(fd Handle, level, opt int, l *Linger) (err error) { 848 sys := sysLinger{Onoff: uint16(l.Onoff), Linger: uint16(l.Linger)} 849 return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&sys)), int32(unsafe.Sizeof(sys))) 850 } 851 852 func SetsockoptInet4Addr(fd Handle, level, opt int, value [4]byte) (err error) { 853 return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&value[0])), 4) 854 } 855 func SetsockoptIPMreq(fd Handle, level, opt int, mreq *IPMreq) (err error) { 856 return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(mreq)), int32(unsafe.Sizeof(*mreq))) 857 } 858 func SetsockoptIPv6Mreq(fd Handle, level, opt int, mreq *IPv6Mreq) (err error) { 859 return syscall.EWINDOWS 860 } 861 862 func Getpid() (pid int) { return int(getCurrentProcessId()) } 863 864 func FindFirstFile(name *uint16, data *Win32finddata) (handle Handle, err error) { 865 // NOTE(rsc): The Win32finddata struct is wrong for the system call: 866 // the two paths are each one uint16 short. Use the correct struct, 867 // a win32finddata1, and then copy the results out. 868 // There is no loss of expressivity here, because the final 869 // uint16, if it is used, is supposed to be a NUL, and Go doesn't need that. 870 // For Go 1.1, we might avoid the allocation of win32finddata1 here 871 // by adding a final Bug [2]uint16 field to the struct and then 872 // adjusting the fields in the result directly. 873 var data1 win32finddata1 874 handle, err = findFirstFile1(name, &data1) 875 if err == nil { 876 copyFindData(data, &data1) 877 } 878 return 879 } 880 881 func FindNextFile(handle Handle, data *Win32finddata) (err error) { 882 var data1 win32finddata1 883 err = findNextFile1(handle, &data1) 884 if err == nil { 885 copyFindData(data, &data1) 886 } 887 return 888 } 889 890 func getProcessEntry(pid int) (*ProcessEntry32, error) { 891 snapshot, err := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0) 892 if err != nil { 893 return nil, err 894 } 895 defer CloseHandle(snapshot) 896 var procEntry ProcessEntry32 897 procEntry.Size = uint32(unsafe.Sizeof(procEntry)) 898 if err = Process32First(snapshot, &procEntry); err != nil { 899 return nil, err 900 } 901 for { 902 if procEntry.ProcessID == uint32(pid) { 903 return &procEntry, nil 904 } 905 err = Process32Next(snapshot, &procEntry) 906 if err != nil { 907 return nil, err 908 } 909 } 910 } 911 912 func Getppid() (ppid int) { 913 pe, err := getProcessEntry(Getpid()) 914 if err != nil { 915 return -1 916 } 917 return int(pe.ParentProcessID) 918 } 919 920 // TODO(brainman): fix all needed for os 921 func Fchdir(fd Handle) (err error) { return syscall.EWINDOWS } 922 func Link(oldpath, newpath string) (err error) { return syscall.EWINDOWS } 923 func Symlink(path, link string) (err error) { return syscall.EWINDOWS } 924 925 func Fchmod(fd Handle, mode uint32) (err error) { return syscall.EWINDOWS } 926 func Chown(path string, uid int, gid int) (err error) { return syscall.EWINDOWS } 927 func Lchown(path string, uid int, gid int) (err error) { return syscall.EWINDOWS } 928 func Fchown(fd Handle, uid int, gid int) (err error) { return syscall.EWINDOWS } 929 930 func Getuid() (uid int) { return -1 } 931 func Geteuid() (euid int) { return -1 } 932 func Getgid() (gid int) { return -1 } 933 func Getegid() (egid int) { return -1 } 934 func Getgroups() (gids []int, err error) { return nil, syscall.EWINDOWS } 935 936 type Signal int 937 938 func (s Signal) Signal() {} 939 940 func (s Signal) String() string { 941 if 0 <= s && int(s) < len(signals) { 942 str := signals[s] 943 if str != "" { 944 return str 945 } 946 } 947 return "signal " + itoa(int(s)) 948 } 949 950 func LoadCreateSymbolicLink() error { 951 return procCreateSymbolicLinkW.Find() 952 } 953 954 // Readlink returns the destination of the named symbolic link. 955 func Readlink(path string, buf []byte) (n int, err error) { 956 fd, err := CreateFile(StringToUTF16Ptr(path), GENERIC_READ, 0, nil, OPEN_EXISTING, 957 FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, 0) 958 if err != nil { 959 return -1, err 960 } 961 defer CloseHandle(fd) 962 963 rdbbuf := make([]byte, MAXIMUM_REPARSE_DATA_BUFFER_SIZE) 964 var bytesReturned uint32 965 err = DeviceIoControl(fd, FSCTL_GET_REPARSE_POINT, nil, 0, &rdbbuf[0], uint32(len(rdbbuf)), &bytesReturned, nil) 966 if err != nil { 967 return -1, err 968 } 969 970 rdb := (*reparseDataBuffer)(unsafe.Pointer(&rdbbuf[0])) 971 var s string 972 switch rdb.ReparseTag { 973 case IO_REPARSE_TAG_SYMLINK: 974 data := (*symbolicLinkReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer)) 975 p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0])) 976 s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2]) 977 case IO_REPARSE_TAG_MOUNT_POINT: 978 data := (*mountPointReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer)) 979 p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0])) 980 s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2]) 981 default: 982 // the path is not a symlink or junction but another type of reparse 983 // point 984 return -1, syscall.ENOENT 985 } 986 n = copy(buf, []byte(s)) 987 988 return n, nil 989 }