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.
5 // Windows system calls.
20 InvalidHandle = ^Handle(0)
22 // Flags for DefineDosDevice.
23 DDD_EXACT_MATCH_ON_REMOVE = 0x00000004
24 DDD_NO_BROADCAST_SYSTEM = 0x00000008
25 DDD_RAW_TARGET_PATH = 0x00000001
26 DDD_REMOVE_DEFINITION = 0x00000002
28 // Return values for GetDriveType.
37 // File system flags from GetVolumeInformation and GetVolumeInformationByHandle.
38 FILE_CASE_SENSITIVE_SEARCH = 0x00000001
39 FILE_CASE_PRESERVED_NAMES = 0x00000002
40 FILE_FILE_COMPRESSION = 0x00000010
41 FILE_DAX_VOLUME = 0x20000000
42 FILE_NAMED_STREAMS = 0x00040000
43 FILE_PERSISTENT_ACLS = 0x00000008
44 FILE_READ_ONLY_VOLUME = 0x00080000
45 FILE_SEQUENTIAL_WRITE_ONCE = 0x00100000
46 FILE_SUPPORTS_ENCRYPTION = 0x00020000
47 FILE_SUPPORTS_EXTENDED_ATTRIBUTES = 0x00800000
48 FILE_SUPPORTS_HARD_LINKS = 0x00400000
49 FILE_SUPPORTS_OBJECT_IDS = 0x00010000
50 FILE_SUPPORTS_OPEN_BY_FILE_ID = 0x01000000
51 FILE_SUPPORTS_REPARSE_POINTS = 0x00000080
52 FILE_SUPPORTS_SPARSE_FILES = 0x00000040
53 FILE_SUPPORTS_TRANSACTIONS = 0x00200000
54 FILE_SUPPORTS_USN_JOURNAL = 0x02000000
55 FILE_UNICODE_ON_DISK = 0x00000004
56 FILE_VOLUME_IS_COMPRESSED = 0x00008000
57 FILE_VOLUME_QUOTAS = 0x00000020
60 // StringToUTF16 is deprecated. Use UTF16FromString instead.
61 // If s contains a NUL byte this function panics instead of
62 // returning an error.
63 func StringToUTF16(s string) []uint16 {
64 a, err := UTF16FromString(s)
66 panic("windows: string with NUL passed to StringToUTF16")
71 // UTF16FromString returns the UTF-16 encoding of the UTF-8 string
72 // s, with a terminating NUL added. If s contains a NUL byte at any
73 // location, it returns (nil, syscall.EINVAL).
74 func UTF16FromString(s string) ([]uint16, error) {
75 for i := 0; i < len(s); i++ {
77 return nil, syscall.EINVAL
80 return utf16.Encode([]rune(s + "\x00")), nil
83 // UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s,
84 // with a terminating NUL removed.
85 func UTF16ToString(s []uint16) string {
92 return string(utf16.Decode(s))
95 // StringToUTF16Ptr is deprecated. Use UTF16PtrFromString instead.
96 // If s contains a NUL byte this function panics instead of
97 // returning an error.
98 func StringToUTF16Ptr(s string) *uint16 { return &StringToUTF16(s)[0] }
100 // UTF16PtrFromString returns pointer to the UTF-16 encoding of
101 // the UTF-8 string s, with a terminating NUL added. If s
102 // contains a NUL byte at any location, it returns (nil, syscall.EINVAL).
103 func UTF16PtrFromString(s string) (*uint16, error) {
104 a, err := UTF16FromString(s)
111 func Getpagesize() int { return 4096 }
113 // NewCallback converts a Go function to a function pointer conforming to the stdcall calling convention.
114 // This is useful when interoperating with Windows code requiring callbacks.
115 // The argument is expected to be a function with with one uintptr-sized result. The function must not have arguments with size larger than the size of uintptr.
116 func NewCallback(fn interface{}) uintptr {
117 return syscall.NewCallback(fn)
120 // NewCallbackCDecl converts a Go function to a function pointer conforming to the cdecl calling convention.
121 // This is useful when interoperating with Windows code requiring callbacks.
122 // The argument is expected to be a function with with one uintptr-sized result. The function must not have arguments with size larger than the size of uintptr.
123 func NewCallbackCDecl(fn interface{}) uintptr {
124 return syscall.NewCallbackCDecl(fn)
129 //sys GetLastError() (lasterr error)
130 //sys LoadLibrary(libname string) (handle Handle, err error) = LoadLibraryW
131 //sys LoadLibraryEx(libname string, zero Handle, flags uintptr) (handle Handle, err error) = LoadLibraryExW
132 //sys FreeLibrary(handle Handle) (err error)
133 //sys GetProcAddress(module Handle, procname string) (proc uintptr, err error)
134 //sys GetVersion() (ver uint32, err error)
135 //sys FormatMessage(flags uint32, msgsrc uintptr, msgid uint32, langid uint32, buf []uint16, args *byte) (n uint32, err error) = FormatMessageW
136 //sys ExitProcess(exitcode uint32)
137 //sys CreateFile(name *uint16, access uint32, mode uint32, sa *SecurityAttributes, createmode uint32, attrs uint32, templatefile int32) (handle Handle, err error) [failretval==InvalidHandle] = CreateFileW
138 //sys ReadFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error)
139 //sys WriteFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error)
140 //sys GetOverlappedResult(handle Handle, overlapped *Overlapped, done *uint32, wait bool) (err error)
141 //sys SetFilePointer(handle Handle, lowoffset int32, highoffsetptr *int32, whence uint32) (newlowoffset uint32, err error) [failretval==0xffffffff]
142 //sys CloseHandle(handle Handle) (err error)
143 //sys GetStdHandle(stdhandle uint32) (handle Handle, err error) [failretval==InvalidHandle]
144 //sys SetStdHandle(stdhandle uint32, handle Handle) (err error)
145 //sys findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstFileW
146 //sys findNextFile1(handle Handle, data *win32finddata1) (err error) = FindNextFileW
147 //sys FindClose(handle Handle) (err error)
148 //sys GetFileInformationByHandle(handle Handle, data *ByHandleFileInformation) (err error)
149 //sys GetCurrentDirectory(buflen uint32, buf *uint16) (n uint32, err error) = GetCurrentDirectoryW
150 //sys SetCurrentDirectory(path *uint16) (err error) = SetCurrentDirectoryW
151 //sys CreateDirectory(path *uint16, sa *SecurityAttributes) (err error) = CreateDirectoryW
152 //sys RemoveDirectory(path *uint16) (err error) = RemoveDirectoryW
153 //sys DeleteFile(path *uint16) (err error) = DeleteFileW
154 //sys MoveFile(from *uint16, to *uint16) (err error) = MoveFileW
155 //sys MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW
156 //sys GetComputerName(buf *uint16, n *uint32) (err error) = GetComputerNameW
157 //sys GetComputerNameEx(nametype uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW
158 //sys SetEndOfFile(handle Handle) (err error)
159 //sys GetSystemTimeAsFileTime(time *Filetime)
160 //sys GetSystemTimePreciseAsFileTime(time *Filetime)
161 //sys GetTimeZoneInformation(tzi *Timezoneinformation) (rc uint32, err error) [failretval==0xffffffff]
162 //sys CreateIoCompletionPort(filehandle Handle, cphandle Handle, key uint32, threadcnt uint32) (handle Handle, err error)
163 //sys GetQueuedCompletionStatus(cphandle Handle, qty *uint32, key *uint32, overlapped **Overlapped, timeout uint32) (err error)
164 //sys PostQueuedCompletionStatus(cphandle Handle, qty uint32, key uint32, overlapped *Overlapped) (err error)
165 //sys CancelIo(s Handle) (err error)
166 //sys CancelIoEx(s Handle, o *Overlapped) (err error)
167 //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
168 //sys OpenProcess(da uint32, inheritHandle bool, pid uint32) (handle Handle, err error)
169 //sys TerminateProcess(handle Handle, exitcode uint32) (err error)
170 //sys GetExitCodeProcess(handle Handle, exitcode *uint32) (err error)
171 //sys GetStartupInfo(startupInfo *StartupInfo) (err error) = GetStartupInfoW
172 //sys GetCurrentProcess() (pseudoHandle Handle, err error)
173 //sys GetProcessTimes(handle Handle, creationTime *Filetime, exitTime *Filetime, kernelTime *Filetime, userTime *Filetime) (err error)
174 //sys DuplicateHandle(hSourceProcessHandle Handle, hSourceHandle Handle, hTargetProcessHandle Handle, lpTargetHandle *Handle, dwDesiredAccess uint32, bInheritHandle bool, dwOptions uint32) (err error)
175 //sys WaitForSingleObject(handle Handle, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff]
176 //sys waitForMultipleObjects(count uint32, handles uintptr, waitAll bool, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff] = WaitForMultipleObjects
177 //sys GetTempPath(buflen uint32, buf *uint16) (n uint32, err error) = GetTempPathW
178 //sys CreatePipe(readhandle *Handle, writehandle *Handle, sa *SecurityAttributes, size uint32) (err error)
179 //sys GetFileType(filehandle Handle) (n uint32, err error)
180 //sys CryptAcquireContext(provhandle *Handle, container *uint16, provider *uint16, provtype uint32, flags uint32) (err error) = advapi32.CryptAcquireContextW
181 //sys CryptReleaseContext(provhandle Handle, flags uint32) (err error) = advapi32.CryptReleaseContext
182 //sys CryptGenRandom(provhandle Handle, buflen uint32, buf *byte) (err error) = advapi32.CryptGenRandom
183 //sys GetEnvironmentStrings() (envs *uint16, err error) [failretval==nil] = kernel32.GetEnvironmentStringsW
184 //sys FreeEnvironmentStrings(envs *uint16) (err error) = kernel32.FreeEnvironmentStringsW
185 //sys GetEnvironmentVariable(name *uint16, buffer *uint16, size uint32) (n uint32, err error) = kernel32.GetEnvironmentVariableW
186 //sys SetEnvironmentVariable(name *uint16, value *uint16) (err error) = kernel32.SetEnvironmentVariableW
187 //sys SetFileTime(handle Handle, ctime *Filetime, atime *Filetime, wtime *Filetime) (err error)
188 //sys GetFileAttributes(name *uint16) (attrs uint32, err error) [failretval==INVALID_FILE_ATTRIBUTES] = kernel32.GetFileAttributesW
189 //sys SetFileAttributes(name *uint16, attrs uint32) (err error) = kernel32.SetFileAttributesW
190 //sys GetFileAttributesEx(name *uint16, level uint32, info *byte) (err error) = kernel32.GetFileAttributesExW
191 //sys GetCommandLine() (cmd *uint16) = kernel32.GetCommandLineW
192 //sys CommandLineToArgv(cmd *uint16, argc *int32) (argv *[8192]*[8192]uint16, err error) [failretval==nil] = shell32.CommandLineToArgvW
193 //sys LocalFree(hmem Handle) (handle Handle, err error) [failretval!=0]
194 //sys SetHandleInformation(handle Handle, mask uint32, flags uint32) (err error)
195 //sys FlushFileBuffers(handle Handle) (err error)
196 //sys GetFullPathName(path *uint16, buflen uint32, buf *uint16, fname **uint16) (n uint32, err error) = kernel32.GetFullPathNameW
197 //sys GetLongPathName(path *uint16, buf *uint16, buflen uint32) (n uint32, err error) = kernel32.GetLongPathNameW
198 //sys GetShortPathName(longpath *uint16, shortpath *uint16, buflen uint32) (n uint32, err error) = kernel32.GetShortPathNameW
199 //sys CreateFileMapping(fhandle Handle, sa *SecurityAttributes, prot uint32, maxSizeHigh uint32, maxSizeLow uint32, name *uint16) (handle Handle, err error) = kernel32.CreateFileMappingW
200 //sys MapViewOfFile(handle Handle, access uint32, offsetHigh uint32, offsetLow uint32, length uintptr) (addr uintptr, err error)
201 //sys UnmapViewOfFile(addr uintptr) (err error)
202 //sys FlushViewOfFile(addr uintptr, length uintptr) (err error)
203 //sys VirtualLock(addr uintptr, length uintptr) (err error)
204 //sys VirtualUnlock(addr uintptr, length uintptr) (err error)
205 //sys VirtualAlloc(address uintptr, size uintptr, alloctype uint32, protect uint32) (value uintptr, err error) = kernel32.VirtualAlloc
206 //sys VirtualFree(address uintptr, size uintptr, freetype uint32) (err error) = kernel32.VirtualFree
207 //sys VirtualProtect(address uintptr, size uintptr, newprotect uint32, oldprotect *uint32) (err error) = kernel32.VirtualProtect
208 //sys TransmitFile(s Handle, handle Handle, bytesToWrite uint32, bytsPerSend uint32, overlapped *Overlapped, transmitFileBuf *TransmitFileBuffers, flags uint32) (err error) = mswsock.TransmitFile
209 //sys ReadDirectoryChanges(handle Handle, buf *byte, buflen uint32, watchSubTree bool, mask uint32, retlen *uint32, overlapped *Overlapped, completionRoutine uintptr) (err error) = kernel32.ReadDirectoryChangesW
210 //sys CertOpenSystemStore(hprov Handle, name *uint16) (store Handle, err error) = crypt32.CertOpenSystemStoreW
211 //sys CertOpenStore(storeProvider uintptr, msgAndCertEncodingType uint32, cryptProv uintptr, flags uint32, para uintptr) (handle Handle, err error) [failretval==InvalidHandle] = crypt32.CertOpenStore
212 //sys CertEnumCertificatesInStore(store Handle, prevContext *CertContext) (context *CertContext, err error) [failretval==nil] = crypt32.CertEnumCertificatesInStore
213 //sys CertAddCertificateContextToStore(store Handle, certContext *CertContext, addDisposition uint32, storeContext **CertContext) (err error) = crypt32.CertAddCertificateContextToStore
214 //sys CertCloseStore(store Handle, flags uint32) (err error) = crypt32.CertCloseStore
215 //sys CertGetCertificateChain(engine Handle, leaf *CertContext, time *Filetime, additionalStore Handle, para *CertChainPara, flags uint32, reserved uintptr, chainCtx **CertChainContext) (err error) = crypt32.CertGetCertificateChain
216 //sys CertFreeCertificateChain(ctx *CertChainContext) = crypt32.CertFreeCertificateChain
217 //sys CertCreateCertificateContext(certEncodingType uint32, certEncoded *byte, encodedLen uint32) (context *CertContext, err error) [failretval==nil] = crypt32.CertCreateCertificateContext
218 //sys CertFreeCertificateContext(ctx *CertContext) (err error) = crypt32.CertFreeCertificateContext
219 //sys CertVerifyCertificateChainPolicy(policyOID uintptr, chain *CertChainContext, para *CertChainPolicyPara, status *CertChainPolicyStatus) (err error) = crypt32.CertVerifyCertificateChainPolicy
220 //sys RegOpenKeyEx(key Handle, subkey *uint16, options uint32, desiredAccess uint32, result *Handle) (regerrno error) = advapi32.RegOpenKeyExW
221 //sys RegCloseKey(key Handle) (regerrno error) = advapi32.RegCloseKey
222 //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
223 //sys RegEnumKeyEx(key Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, class *uint16, classLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegEnumKeyExW
224 //sys RegQueryValueEx(key Handle, name *uint16, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) = advapi32.RegQueryValueExW
225 //sys getCurrentProcessId() (pid uint32) = kernel32.GetCurrentProcessId
226 //sys GetConsoleMode(console Handle, mode *uint32) (err error) = kernel32.GetConsoleMode
227 //sys SetConsoleMode(console Handle, mode uint32) (err error) = kernel32.SetConsoleMode
228 //sys GetConsoleScreenBufferInfo(console Handle, info *ConsoleScreenBufferInfo) (err error) = kernel32.GetConsoleScreenBufferInfo
229 //sys WriteConsole(console Handle, buf *uint16, towrite uint32, written *uint32, reserved *byte) (err error) = kernel32.WriteConsoleW
230 //sys ReadConsole(console Handle, buf *uint16, toread uint32, read *uint32, inputControl *byte) (err error) = kernel32.ReadConsoleW
231 //sys CreateToolhelp32Snapshot(flags uint32, processId uint32) (handle Handle, err error) [failretval==InvalidHandle] = kernel32.CreateToolhelp32Snapshot
232 //sys Process32First(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32FirstW
233 //sys Process32Next(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32NextW
234 //sys DeviceIoControl(handle Handle, ioControlCode uint32, inBuffer *byte, inBufferSize uint32, outBuffer *byte, outBufferSize uint32, bytesReturned *uint32, overlapped *Overlapped) (err error)
235 // This function returns 1 byte BOOLEAN rather than the 4 byte BOOL.
236 //sys CreateSymbolicLink(symlinkfilename *uint16, targetfilename *uint16, flags uint32) (err error) [failretval&0xff==0] = CreateSymbolicLinkW
237 //sys CreateHardLink(filename *uint16, existingfilename *uint16, reserved uintptr) (err error) [failretval&0xff==0] = CreateHardLinkW
238 //sys GetCurrentThreadId() (id uint32)
239 //sys CreateEvent(eventAttrs *SecurityAttributes, manualReset uint32, initialState uint32, name *uint16) (handle Handle, err error) = kernel32.CreateEventW
240 //sys CreateEventEx(eventAttrs *SecurityAttributes, name *uint16, flags uint32, desiredAccess uint32) (handle Handle, err error) = kernel32.CreateEventExW
241 //sys OpenEvent(desiredAccess uint32, inheritHandle bool, name *uint16) (handle Handle, err error) = kernel32.OpenEventW
242 //sys SetEvent(event Handle) (err error) = kernel32.SetEvent
243 //sys ResetEvent(event Handle) (err error) = kernel32.ResetEvent
244 //sys PulseEvent(event Handle) (err error) = kernel32.PulseEvent
246 // Volume Management Functions
247 //sys DefineDosDevice(flags uint32, deviceName *uint16, targetPath *uint16) (err error) = DefineDosDeviceW
248 //sys DeleteVolumeMountPoint(volumeMountPoint *uint16) (err error) = DeleteVolumeMountPointW
249 //sys FindFirstVolume(volumeName *uint16, bufferLength uint32) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstVolumeW
250 //sys FindFirstVolumeMountPoint(rootPathName *uint16, volumeMountPoint *uint16, bufferLength uint32) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstVolumeMountPointW
251 //sys FindNextVolume(findVolume Handle, volumeName *uint16, bufferLength uint32) (err error) = FindNextVolumeW
252 //sys FindNextVolumeMountPoint(findVolumeMountPoint Handle, volumeMountPoint *uint16, bufferLength uint32) (err error) = FindNextVolumeMountPointW
253 //sys FindVolumeClose(findVolume Handle) (err error)
254 //sys FindVolumeMountPointClose(findVolumeMountPoint Handle) (err error)
255 //sys GetDriveType(rootPathName *uint16) (driveType uint32) = GetDriveTypeW
256 //sys GetLogicalDrives() (drivesBitMask uint32, err error) [failretval==0]
257 //sys GetLogicalDriveStrings(bufferLength uint32, buffer *uint16) (n uint32, err error) [failretval==0] = GetLogicalDriveStringsW
258 //sys GetVolumeInformation(rootPathName *uint16, volumeNameBuffer *uint16, volumeNameSize uint32, volumeNameSerialNumber *uint32, maximumComponentLength *uint32, fileSystemFlags *uint32, fileSystemNameBuffer *uint16, fileSystemNameSize uint32) (err error) = GetVolumeInformationW
259 //sys GetVolumeInformationByHandle(file Handle, volumeNameBuffer *uint16, volumeNameSize uint32, volumeNameSerialNumber *uint32, maximumComponentLength *uint32, fileSystemFlags *uint32, fileSystemNameBuffer *uint16, fileSystemNameSize uint32) (err error) = GetVolumeInformationByHandleW
260 //sys GetVolumeNameForVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16, bufferlength uint32) (err error) = GetVolumeNameForVolumeMountPointW
261 //sys GetVolumePathName(fileName *uint16, volumePathName *uint16, bufferLength uint32) (err error) = GetVolumePathNameW
262 //sys GetVolumePathNamesForVolumeName(volumeName *uint16, volumePathNames *uint16, bufferLength uint32, returnLength *uint32) (err error) = GetVolumePathNamesForVolumeNameW
263 //sys QueryDosDevice(deviceName *uint16, targetPath *uint16, max uint32) (n uint32, err error) [failretval==0] = QueryDosDeviceW
264 //sys SetVolumeLabel(rootPathName *uint16, volumeName *uint16) (err error) = SetVolumeLabelW
265 //sys SetVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16) (err error) = SetVolumeMountPointW
267 // syscall interface implementation for other packages
269 // GetProcAddressByOrdinal retrieves the address of the exported
270 // function from module by ordinal.
271 func GetProcAddressByOrdinal(module Handle, ordinal uintptr) (proc uintptr, err error) {
272 r0, _, e1 := syscall.Syscall(procGetProcAddress.Addr(), 2, uintptr(module), ordinal, 0)
284 func Exit(code int) { ExitProcess(uint32(code)) }
286 func makeInheritSa() *SecurityAttributes {
287 var sa SecurityAttributes
288 sa.Length = uint32(unsafe.Sizeof(sa))
293 func Open(path string, mode int, perm uint32) (fd Handle, err error) {
295 return InvalidHandle, ERROR_FILE_NOT_FOUND
297 pathp, err := UTF16PtrFromString(path)
299 return InvalidHandle, err
302 switch mode & (O_RDONLY | O_WRONLY | O_RDWR) {
304 access = GENERIC_READ
306 access = GENERIC_WRITE
308 access = GENERIC_READ | GENERIC_WRITE
310 if mode&O_CREAT != 0 {
311 access |= GENERIC_WRITE
313 if mode&O_APPEND != 0 {
314 access &^= GENERIC_WRITE
315 access |= FILE_APPEND_DATA
317 sharemode := uint32(FILE_SHARE_READ | FILE_SHARE_WRITE)
318 var sa *SecurityAttributes
319 if mode&O_CLOEXEC == 0 {
322 var createmode uint32
324 case mode&(O_CREAT|O_EXCL) == (O_CREAT | O_EXCL):
325 createmode = CREATE_NEW
326 case mode&(O_CREAT|O_TRUNC) == (O_CREAT | O_TRUNC):
327 createmode = CREATE_ALWAYS
328 case mode&O_CREAT == O_CREAT:
329 createmode = OPEN_ALWAYS
330 case mode&O_TRUNC == O_TRUNC:
331 createmode = TRUNCATE_EXISTING
333 createmode = OPEN_EXISTING
335 h, e := CreateFile(pathp, access, sharemode, sa, createmode, FILE_ATTRIBUTE_NORMAL, 0)
339 func Read(fd Handle, p []byte) (n int, err error) {
341 e := ReadFile(fd, p, &done, nil)
343 if e == ERROR_BROKEN_PIPE {
344 // NOTE(brainman): work around ERROR_BROKEN_PIPE is returned on reading EOF from stdin
351 raceWriteRange(unsafe.Pointer(&p[0]), int(done))
353 raceAcquire(unsafe.Pointer(&ioSync))
355 return int(done), nil
358 func Write(fd Handle, p []byte) (n int, err error) {
360 raceReleaseMerge(unsafe.Pointer(&ioSync))
363 e := WriteFile(fd, p, &done, nil)
367 if raceenabled && done > 0 {
368 raceReadRange(unsafe.Pointer(&p[0]), int(done))
370 return int(done), nil
375 func Seek(fd Handle, offset int64, whence int) (newoffset int64, err error) {
385 hi := int32(offset >> 32)
387 // use GetFileType to check pipe, pipe can't do seek
388 ft, _ := GetFileType(fd)
389 if ft == FILE_TYPE_PIPE {
390 return 0, syscall.EPIPE
392 rlo, e := SetFilePointer(fd, lo, &hi, w)
396 return int64(hi)<<32 + int64(rlo), nil
399 func Close(fd Handle) (err error) {
400 return CloseHandle(fd)
404 Stdin = getStdHandle(STD_INPUT_HANDLE)
405 Stdout = getStdHandle(STD_OUTPUT_HANDLE)
406 Stderr = getStdHandle(STD_ERROR_HANDLE)
409 func getStdHandle(stdhandle uint32) (fd Handle) {
410 r, _ := GetStdHandle(stdhandle)
415 const ImplementsGetwd = true
417 func Getwd() (wd string, err error) {
418 b := make([]uint16, 300)
419 n, e := GetCurrentDirectory(uint32(len(b)), &b[0])
423 return string(utf16.Decode(b[0:n])), nil
426 func Chdir(path string) (err error) {
427 pathp, err := UTF16PtrFromString(path)
431 return SetCurrentDirectory(pathp)
434 func Mkdir(path string, mode uint32) (err error) {
435 pathp, err := UTF16PtrFromString(path)
439 return CreateDirectory(pathp, nil)
442 func Rmdir(path string) (err error) {
443 pathp, err := UTF16PtrFromString(path)
447 return RemoveDirectory(pathp)
450 func Unlink(path string) (err error) {
451 pathp, err := UTF16PtrFromString(path)
455 return DeleteFile(pathp)
458 func Rename(oldpath, newpath string) (err error) {
459 from, err := UTF16PtrFromString(oldpath)
463 to, err := UTF16PtrFromString(newpath)
467 return MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING)
470 func ComputerName() (name string, err error) {
471 var n uint32 = MAX_COMPUTERNAME_LENGTH + 1
472 b := make([]uint16, n)
473 e := GetComputerName(&b[0], &n)
477 return string(utf16.Decode(b[0:n])), nil
480 func Ftruncate(fd Handle, length int64) (err error) {
481 curoffset, e := Seek(fd, 0, 1)
485 defer Seek(fd, curoffset, 0)
486 _, e = Seek(fd, length, 0)
497 func Gettimeofday(tv *Timeval) (err error) {
499 GetSystemTimeAsFileTime(&ft)
500 *tv = NsecToTimeval(ft.Nanoseconds())
504 func Pipe(p []Handle) (err error) {
506 return syscall.EINVAL
509 e := CreatePipe(&r, &w, makeInheritSa(), 0)
518 func Utimes(path string, tv []Timeval) (err error) {
520 return syscall.EINVAL
522 pathp, e := UTF16PtrFromString(path)
526 h, e := CreateFile(pathp,
527 FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil,
528 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)
533 a := NsecToFiletime(tv[0].Nanoseconds())
534 w := NsecToFiletime(tv[1].Nanoseconds())
535 return SetFileTime(h, nil, &a, &w)
538 func UtimesNano(path string, ts []Timespec) (err error) {
540 return syscall.EINVAL
542 pathp, e := UTF16PtrFromString(path)
546 h, e := CreateFile(pathp,
547 FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil,
548 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)
553 a := NsecToFiletime(TimespecToNsec(ts[0]))
554 w := NsecToFiletime(TimespecToNsec(ts[1]))
555 return SetFileTime(h, nil, &a, &w)
558 func Fsync(fd Handle) (err error) {
559 return FlushFileBuffers(fd)
562 func Chmod(path string, mode uint32) (err error) {
564 return syscall.EINVAL
566 p, e := UTF16PtrFromString(path)
570 attrs, e := GetFileAttributes(p)
574 if mode&S_IWRITE != 0 {
575 attrs &^= FILE_ATTRIBUTE_READONLY
577 attrs |= FILE_ATTRIBUTE_READONLY
579 return SetFileAttributes(p, attrs)
582 func LoadGetSystemTimePreciseAsFileTime() error {
583 return procGetSystemTimePreciseAsFileTime.Find()
586 func LoadCancelIoEx() error {
587 return procCancelIoEx.Find()
590 func LoadSetFileCompletionNotificationModes() error {
591 return procSetFileCompletionNotificationModes.Find()
594 func WaitForMultipleObjects(handles []Handle, waitAll bool, waitMilliseconds uint32) (event uint32, err error) {
595 // Every other win32 array API takes arguments as "pointer, count", except for this function. So we
596 // can't declare it as a usual [] type, because mksyscall will use the opposite order. We therefore
597 // trivially stub this ourselves.
599 var handlePtr *Handle
600 if len(handles) > 0 {
601 handlePtr = &handles[0]
603 return waitForMultipleObjects(uint32(len(handles)), uintptr(unsafe.Pointer(handlePtr)), waitAll, waitMilliseconds)
608 const socket_error = uintptr(^uint32(0))
610 //sys WSAStartup(verreq uint32, data *WSAData) (sockerr error) = ws2_32.WSAStartup
611 //sys WSACleanup() (err error) [failretval==socket_error] = ws2_32.WSACleanup
612 //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
613 //sys socket(af int32, typ int32, protocol int32) (handle Handle, err error) [failretval==InvalidHandle] = ws2_32.socket
614 //sys Setsockopt(s Handle, level int32, optname int32, optval *byte, optlen int32) (err error) [failretval==socket_error] = ws2_32.setsockopt
615 //sys Getsockopt(s Handle, level int32, optname int32, optval *byte, optlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockopt
616 //sys bind(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.bind
617 //sys connect(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.connect
618 //sys getsockname(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockname
619 //sys getpeername(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getpeername
620 //sys listen(s Handle, backlog int32) (err error) [failretval==socket_error] = ws2_32.listen
621 //sys shutdown(s Handle, how int32) (err error) [failretval==socket_error] = ws2_32.shutdown
622 //sys Closesocket(s Handle) (err error) [failretval==socket_error] = ws2_32.closesocket
623 //sys AcceptEx(ls Handle, as Handle, buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, recvd *uint32, overlapped *Overlapped) (err error) = mswsock.AcceptEx
624 //sys GetAcceptExSockaddrs(buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, lrsa **RawSockaddrAny, lrsalen *int32, rrsa **RawSockaddrAny, rrsalen *int32) = mswsock.GetAcceptExSockaddrs
625 //sys WSARecv(s Handle, bufs *WSABuf, bufcnt uint32, recvd *uint32, flags *uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSARecv
626 //sys WSASend(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSASend
627 //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
628 //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
629 //sys GetHostByName(name string) (h *Hostent, err error) [failretval==nil] = ws2_32.gethostbyname
630 //sys GetServByName(name string, proto string) (s *Servent, err error) [failretval==nil] = ws2_32.getservbyname
631 //sys Ntohs(netshort uint16) (u uint16) = ws2_32.ntohs
632 //sys GetProtoByName(name string) (p *Protoent, err error) [failretval==nil] = ws2_32.getprotobyname
633 //sys DnsQuery(name string, qtype uint16, options uint32, extra *byte, qrs **DNSRecord, pr *byte) (status error) = dnsapi.DnsQuery_W
634 //sys DnsRecordListFree(rl *DNSRecord, freetype uint32) = dnsapi.DnsRecordListFree
635 //sys DnsNameCompare(name1 *uint16, name2 *uint16) (same bool) = dnsapi.DnsNameCompare_W
636 //sys GetAddrInfoW(nodename *uint16, servicename *uint16, hints *AddrinfoW, result **AddrinfoW) (sockerr error) = ws2_32.GetAddrInfoW
637 //sys FreeAddrInfoW(addrinfo *AddrinfoW) = ws2_32.FreeAddrInfoW
638 //sys GetIfEntry(pIfRow *MibIfRow) (errcode error) = iphlpapi.GetIfEntry
639 //sys GetAdaptersInfo(ai *IpAdapterInfo, ol *uint32) (errcode error) = iphlpapi.GetAdaptersInfo
640 //sys SetFileCompletionNotificationModes(handle Handle, flags uint8) (err error) = kernel32.SetFileCompletionNotificationModes
641 //sys WSAEnumProtocols(protocols *int32, protocolBuffer *WSAProtocolInfo, bufferLength *uint32) (n int32, err error) [failretval==-1] = ws2_32.WSAEnumProtocolsW
642 //sys GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses
643 //sys GetACP() (acp uint32) = kernel32.GetACP
644 //sys MultiByteToWideChar(codePage uint32, dwFlags uint32, str *byte, nstr int32, wchar *uint16, nwchar int32) (nwrite int32, err error) = kernel32.MultiByteToWideChar
646 // For testing: clients can set this flag to force
647 // creation of IPv6 sockets to return EAFNOSUPPORT.
648 var SocketDisableIPv6 bool
650 type RawSockaddrInet4 struct {
653 Addr [4]byte /* in_addr */
657 type RawSockaddrInet6 struct {
661 Addr [16]byte /* in6_addr */
665 type RawSockaddr struct {
670 type RawSockaddrAny struct {
675 type Sockaddr interface {
676 sockaddr() (ptr unsafe.Pointer, len int32, err error) // lowercase; only we can define Sockaddrs
679 type SockaddrInet4 struct {
685 func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, int32, error) {
686 if sa.Port < 0 || sa.Port > 0xFFFF {
687 return nil, 0, syscall.EINVAL
689 sa.raw.Family = AF_INET
690 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
691 p[0] = byte(sa.Port >> 8)
693 for i := 0; i < len(sa.Addr); i++ {
694 sa.raw.Addr[i] = sa.Addr[i]
696 return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil
699 type SockaddrInet6 struct {
706 func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, int32, error) {
707 if sa.Port < 0 || sa.Port > 0xFFFF {
708 return nil, 0, syscall.EINVAL
710 sa.raw.Family = AF_INET6
711 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
712 p[0] = byte(sa.Port >> 8)
714 sa.raw.Scope_id = sa.ZoneId
715 for i := 0; i < len(sa.Addr); i++ {
716 sa.raw.Addr[i] = sa.Addr[i]
718 return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil
721 type RawSockaddrUnix struct {
723 Path [UNIX_PATH_MAX]int8
726 type SockaddrUnix struct {
731 func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, int32, error) {
734 if n > len(sa.raw.Path) {
735 return nil, 0, syscall.EINVAL
737 if n == len(sa.raw.Path) && name[0] != '@' {
738 return nil, 0, syscall.EINVAL
740 sa.raw.Family = AF_UNIX
741 for i := 0; i < n; i++ {
742 sa.raw.Path[i] = int8(name[i])
744 // length is family (uint16), name, NUL.
749 if sa.raw.Path[0] == '@' {
751 // Don't count trailing NUL for abstract address.
755 return unsafe.Pointer(&sa.raw), sl, nil
758 func (rsa *RawSockaddrAny) Sockaddr() (Sockaddr, error) {
759 switch rsa.Addr.Family {
761 pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
762 sa := new(SockaddrUnix)
764 // "Abstract" Unix domain socket.
765 // Rewrite leading NUL as @ for textual display.
766 // (This is the standard convention.)
767 // Not friendly to overwrite in place,
768 // but the callers below don't care.
772 // Assume path ends at NUL.
773 // This is not technically the Linux semantics for
774 // abstract Unix domain sockets--they are supposed
775 // to be uninterpreted fixed-size binary blobs--but
776 // everyone uses this convention.
778 for n < len(pp.Path) && pp.Path[n] != 0 {
781 bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
782 sa.Name = string(bytes)
786 pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
787 sa := new(SockaddrInet4)
788 p := (*[2]byte)(unsafe.Pointer(&pp.Port))
789 sa.Port = int(p[0])<<8 + int(p[1])
790 for i := 0; i < len(sa.Addr); i++ {
791 sa.Addr[i] = pp.Addr[i]
796 pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
797 sa := new(SockaddrInet6)
798 p := (*[2]byte)(unsafe.Pointer(&pp.Port))
799 sa.Port = int(p[0])<<8 + int(p[1])
800 sa.ZoneId = pp.Scope_id
801 for i := 0; i < len(sa.Addr); i++ {
802 sa.Addr[i] = pp.Addr[i]
806 return nil, syscall.EAFNOSUPPORT
809 func Socket(domain, typ, proto int) (fd Handle, err error) {
810 if domain == AF_INET6 && SocketDisableIPv6 {
811 return InvalidHandle, syscall.EAFNOSUPPORT
813 return socket(int32(domain), int32(typ), int32(proto))
816 func SetsockoptInt(fd Handle, level, opt int, value int) (err error) {
818 return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&v)), int32(unsafe.Sizeof(v)))
821 func Bind(fd Handle, sa Sockaddr) (err error) {
822 ptr, n, err := sa.sockaddr()
826 return bind(fd, ptr, n)
829 func Connect(fd Handle, sa Sockaddr) (err error) {
830 ptr, n, err := sa.sockaddr()
834 return connect(fd, ptr, n)
837 func Getsockname(fd Handle) (sa Sockaddr, err error) {
838 var rsa RawSockaddrAny
839 l := int32(unsafe.Sizeof(rsa))
840 if err = getsockname(fd, &rsa, &l); err != nil {
843 return rsa.Sockaddr()
846 func Getpeername(fd Handle) (sa Sockaddr, err error) {
847 var rsa RawSockaddrAny
848 l := int32(unsafe.Sizeof(rsa))
849 if err = getpeername(fd, &rsa, &l); err != nil {
852 return rsa.Sockaddr()
855 func Listen(s Handle, n int) (err error) {
856 return listen(s, int32(n))
859 func Shutdown(fd Handle, how int) (err error) {
860 return shutdown(fd, int32(how))
863 func WSASendto(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to Sockaddr, overlapped *Overlapped, croutine *byte) (err error) {
864 rsa, l, err := to.sockaddr()
868 return WSASendTo(s, bufs, bufcnt, sent, flags, (*RawSockaddrAny)(unsafe.Pointer(rsa)), l, overlapped, croutine)
871 func LoadGetAddrInfo() error {
872 return procGetAddrInfoW.Find()
875 var connectExFunc struct {
881 func LoadConnectEx() error {
882 connectExFunc.once.Do(func() {
884 s, connectExFunc.err = Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)
885 if connectExFunc.err != nil {
890 connectExFunc.err = WSAIoctl(s,
891 SIO_GET_EXTENSION_FUNCTION_POINTER,
892 (*byte)(unsafe.Pointer(&WSAID_CONNECTEX)),
893 uint32(unsafe.Sizeof(WSAID_CONNECTEX)),
894 (*byte)(unsafe.Pointer(&connectExFunc.addr)),
895 uint32(unsafe.Sizeof(connectExFunc.addr)),
898 return connectExFunc.err
901 func connectEx(s Handle, name unsafe.Pointer, namelen int32, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) (err error) {
902 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)
913 func ConnectEx(fd Handle, sa Sockaddr, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) error {
914 err := LoadConnectEx()
916 return errorspkg.New("failed to find ConnectEx: " + err.Error())
918 ptr, n, err := sa.sockaddr()
922 return connectEx(fd, ptr, n, sendBuf, sendDataLen, bytesSent, overlapped)
925 var sendRecvMsgFunc struct {
932 func loadWSASendRecvMsg() error {
933 sendRecvMsgFunc.once.Do(func() {
935 s, sendRecvMsgFunc.err = Socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)
936 if sendRecvMsgFunc.err != nil {
941 sendRecvMsgFunc.err = WSAIoctl(s,
942 SIO_GET_EXTENSION_FUNCTION_POINTER,
943 (*byte)(unsafe.Pointer(&WSAID_WSARECVMSG)),
944 uint32(unsafe.Sizeof(WSAID_WSARECVMSG)),
945 (*byte)(unsafe.Pointer(&sendRecvMsgFunc.recvAddr)),
946 uint32(unsafe.Sizeof(sendRecvMsgFunc.recvAddr)),
948 if sendRecvMsgFunc.err != nil {
951 sendRecvMsgFunc.err = WSAIoctl(s,
952 SIO_GET_EXTENSION_FUNCTION_POINTER,
953 (*byte)(unsafe.Pointer(&WSAID_WSASENDMSG)),
954 uint32(unsafe.Sizeof(WSAID_WSASENDMSG)),
955 (*byte)(unsafe.Pointer(&sendRecvMsgFunc.sendAddr)),
956 uint32(unsafe.Sizeof(sendRecvMsgFunc.sendAddr)),
959 return sendRecvMsgFunc.err
962 func WSASendMsg(fd Handle, msg *WSAMsg, flags uint32, bytesSent *uint32, overlapped *Overlapped, croutine *byte) error {
963 err := loadWSASendRecvMsg()
967 r1, _, e1 := syscall.Syscall6(sendRecvMsgFunc.sendAddr, 6, uintptr(fd), uintptr(unsafe.Pointer(msg)), uintptr(flags), uintptr(unsafe.Pointer(bytesSent)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine)))
968 if r1 == socket_error {
978 func WSARecvMsg(fd Handle, msg *WSAMsg, bytesReceived *uint32, overlapped *Overlapped, croutine *byte) error {
979 err := loadWSASendRecvMsg()
983 r1, _, e1 := syscall.Syscall6(sendRecvMsgFunc.recvAddr, 5, uintptr(fd), uintptr(unsafe.Pointer(msg)), uintptr(unsafe.Pointer(bytesReceived)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine)), 0)
984 if r1 == socket_error {
994 // Invented structures to support what package os expects.
996 CreationTime Filetime
1002 type WaitStatus struct {
1006 func (w WaitStatus) Exited() bool { return true }
1008 func (w WaitStatus) ExitStatus() int { return int(w.ExitCode) }
1010 func (w WaitStatus) Signal() Signal { return -1 }
1012 func (w WaitStatus) CoreDump() bool { return false }
1014 func (w WaitStatus) Stopped() bool { return false }
1016 func (w WaitStatus) Continued() bool { return false }
1018 func (w WaitStatus) StopSignal() Signal { return -1 }
1020 func (w WaitStatus) Signaled() bool { return false }
1022 func (w WaitStatus) TrapCause() int { return -1 }
1024 // Timespec is an invented structure on Windows, but here for
1025 // consistency with the corresponding package for other operating systems.
1026 type Timespec struct {
1031 func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
1033 func NsecToTimespec(nsec int64) (ts Timespec) {
1035 ts.Nsec = nsec % 1e9
1039 // TODO(brainman): fix all needed for net
1041 func Accept(fd Handle) (nfd Handle, sa Sockaddr, err error) { return 0, nil, syscall.EWINDOWS }
1042 func Recvfrom(fd Handle, p []byte, flags int) (n int, from Sockaddr, err error) {
1043 return 0, nil, syscall.EWINDOWS
1045 func Sendto(fd Handle, p []byte, flags int, to Sockaddr) (err error) { return syscall.EWINDOWS }
1046 func SetsockoptTimeval(fd Handle, level, opt int, tv *Timeval) (err error) { return syscall.EWINDOWS }
1048 // The Linger struct is wrong but we only noticed after Go 1.
1049 // sysLinger is the real system call structure.
1051 // BUG(brainman): The definition of Linger is not appropriate for direct use
1052 // with Setsockopt and Getsockopt.
1053 // Use SetsockoptLinger instead.
1055 type Linger struct {
1060 type sysLinger struct {
1065 type IPMreq struct {
1066 Multiaddr [4]byte /* in_addr */
1067 Interface [4]byte /* in_addr */
1070 type IPv6Mreq struct {
1071 Multiaddr [16]byte /* in6_addr */
1075 func GetsockoptInt(fd Handle, level, opt int) (int, error) { return -1, syscall.EWINDOWS }
1077 func SetsockoptLinger(fd Handle, level, opt int, l *Linger) (err error) {
1078 sys := sysLinger{Onoff: uint16(l.Onoff), Linger: uint16(l.Linger)}
1079 return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&sys)), int32(unsafe.Sizeof(sys)))
1082 func SetsockoptInet4Addr(fd Handle, level, opt int, value [4]byte) (err error) {
1083 return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&value[0])), 4)
1085 func SetsockoptIPMreq(fd Handle, level, opt int, mreq *IPMreq) (err error) {
1086 return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(mreq)), int32(unsafe.Sizeof(*mreq)))
1088 func SetsockoptIPv6Mreq(fd Handle, level, opt int, mreq *IPv6Mreq) (err error) {
1089 return syscall.EWINDOWS
1092 func Getpid() (pid int) { return int(getCurrentProcessId()) }
1094 func FindFirstFile(name *uint16, data *Win32finddata) (handle Handle, err error) {
1095 // NOTE(rsc): The Win32finddata struct is wrong for the system call:
1096 // the two paths are each one uint16 short. Use the correct struct,
1097 // a win32finddata1, and then copy the results out.
1098 // There is no loss of expressivity here, because the final
1099 // uint16, if it is used, is supposed to be a NUL, and Go doesn't need that.
1100 // For Go 1.1, we might avoid the allocation of win32finddata1 here
1101 // by adding a final Bug [2]uint16 field to the struct and then
1102 // adjusting the fields in the result directly.
1103 var data1 win32finddata1
1104 handle, err = findFirstFile1(name, &data1)
1106 copyFindData(data, &data1)
1111 func FindNextFile(handle Handle, data *Win32finddata) (err error) {
1112 var data1 win32finddata1
1113 err = findNextFile1(handle, &data1)
1115 copyFindData(data, &data1)
1120 func getProcessEntry(pid int) (*ProcessEntry32, error) {
1121 snapshot, err := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
1125 defer CloseHandle(snapshot)
1126 var procEntry ProcessEntry32
1127 procEntry.Size = uint32(unsafe.Sizeof(procEntry))
1128 if err = Process32First(snapshot, &procEntry); err != nil {
1132 if procEntry.ProcessID == uint32(pid) {
1133 return &procEntry, nil
1135 err = Process32Next(snapshot, &procEntry)
1142 func Getppid() (ppid int) {
1143 pe, err := getProcessEntry(Getpid())
1147 return int(pe.ParentProcessID)
1150 // TODO(brainman): fix all needed for os
1151 func Fchdir(fd Handle) (err error) { return syscall.EWINDOWS }
1152 func Link(oldpath, newpath string) (err error) { return syscall.EWINDOWS }
1153 func Symlink(path, link string) (err error) { return syscall.EWINDOWS }
1155 func Fchmod(fd Handle, mode uint32) (err error) { return syscall.EWINDOWS }
1156 func Chown(path string, uid int, gid int) (err error) { return syscall.EWINDOWS }
1157 func Lchown(path string, uid int, gid int) (err error) { return syscall.EWINDOWS }
1158 func Fchown(fd Handle, uid int, gid int) (err error) { return syscall.EWINDOWS }
1160 func Getuid() (uid int) { return -1 }
1161 func Geteuid() (euid int) { return -1 }
1162 func Getgid() (gid int) { return -1 }
1163 func Getegid() (egid int) { return -1 }
1164 func Getgroups() (gids []int, err error) { return nil, syscall.EWINDOWS }
1168 func (s Signal) Signal() {}
1170 func (s Signal) String() string {
1171 if 0 <= s && int(s) < len(signals) {
1177 return "signal " + itoa(int(s))
1180 func LoadCreateSymbolicLink() error {
1181 return procCreateSymbolicLinkW.Find()
1184 // Readlink returns the destination of the named symbolic link.
1185 func Readlink(path string, buf []byte) (n int, err error) {
1186 fd, err := CreateFile(StringToUTF16Ptr(path), GENERIC_READ, 0, nil, OPEN_EXISTING,
1187 FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, 0)
1191 defer CloseHandle(fd)
1193 rdbbuf := make([]byte, MAXIMUM_REPARSE_DATA_BUFFER_SIZE)
1194 var bytesReturned uint32
1195 err = DeviceIoControl(fd, FSCTL_GET_REPARSE_POINT, nil, 0, &rdbbuf[0], uint32(len(rdbbuf)), &bytesReturned, nil)
1200 rdb := (*reparseDataBuffer)(unsafe.Pointer(&rdbbuf[0]))
1202 switch rdb.ReparseTag {
1203 case IO_REPARSE_TAG_SYMLINK:
1204 data := (*symbolicLinkReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
1205 p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
1206 s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2])
1207 case IO_REPARSE_TAG_MOUNT_POINT:
1208 data := (*mountPointReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
1209 p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
1210 s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2])
1212 // the path is not a symlink or junction but another type of reparse
1214 return -1, syscall.ENOENT
1216 n = copy(buf, []byte(s))