// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // Windows system calls. package windows import ( errorspkg "errors" "sync" "syscall" "unicode/utf16" "unsafe" ) type Handle uintptr const ( InvalidHandle = ^Handle(0) // Flags for DefineDosDevice. DDD_EXACT_MATCH_ON_REMOVE = 0x00000004 DDD_NO_BROADCAST_SYSTEM = 0x00000008 DDD_RAW_TARGET_PATH = 0x00000001 DDD_REMOVE_DEFINITION = 0x00000002 // Return values for GetDriveType. DRIVE_UNKNOWN = 0 DRIVE_NO_ROOT_DIR = 1 DRIVE_REMOVABLE = 2 DRIVE_FIXED = 3 DRIVE_REMOTE = 4 DRIVE_CDROM = 5 DRIVE_RAMDISK = 6 // File system flags from GetVolumeInformation and GetVolumeInformationByHandle. FILE_CASE_SENSITIVE_SEARCH = 0x00000001 FILE_CASE_PRESERVED_NAMES = 0x00000002 FILE_FILE_COMPRESSION = 0x00000010 FILE_DAX_VOLUME = 0x20000000 FILE_NAMED_STREAMS = 0x00040000 FILE_PERSISTENT_ACLS = 0x00000008 FILE_READ_ONLY_VOLUME = 0x00080000 FILE_SEQUENTIAL_WRITE_ONCE = 0x00100000 FILE_SUPPORTS_ENCRYPTION = 0x00020000 FILE_SUPPORTS_EXTENDED_ATTRIBUTES = 0x00800000 FILE_SUPPORTS_HARD_LINKS = 0x00400000 FILE_SUPPORTS_OBJECT_IDS = 0x00010000 FILE_SUPPORTS_OPEN_BY_FILE_ID = 0x01000000 FILE_SUPPORTS_REPARSE_POINTS = 0x00000080 FILE_SUPPORTS_SPARSE_FILES = 0x00000040 FILE_SUPPORTS_TRANSACTIONS = 0x00200000 FILE_SUPPORTS_USN_JOURNAL = 0x02000000 FILE_UNICODE_ON_DISK = 0x00000004 FILE_VOLUME_IS_COMPRESSED = 0x00008000 FILE_VOLUME_QUOTAS = 0x00000020 ) // StringToUTF16 is deprecated. Use UTF16FromString instead. // If s contains a NUL byte this function panics instead of // returning an error. func StringToUTF16(s string) []uint16 { a, err := UTF16FromString(s) if err != nil { panic("windows: string with NUL passed to StringToUTF16") } return a } // UTF16FromString returns the UTF-16 encoding of the UTF-8 string // s, with a terminating NUL added. If s contains a NUL byte at any // location, it returns (nil, syscall.EINVAL). func UTF16FromString(s string) ([]uint16, error) { for i := 0; i < len(s); i++ { if s[i] == 0 { return nil, syscall.EINVAL } } return utf16.Encode([]rune(s + "\x00")), nil } // UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s, // with a terminating NUL removed. func UTF16ToString(s []uint16) string { for i, v := range s { if v == 0 { s = s[0:i] break } } return string(utf16.Decode(s)) } // StringToUTF16Ptr is deprecated. Use UTF16PtrFromString instead. // If s contains a NUL byte this function panics instead of // returning an error. func StringToUTF16Ptr(s string) *uint16 { return &StringToUTF16(s)[0] } // UTF16PtrFromString returns pointer to the UTF-16 encoding of // the UTF-8 string s, with a terminating NUL added. If s // contains a NUL byte at any location, it returns (nil, syscall.EINVAL). func UTF16PtrFromString(s string) (*uint16, error) { a, err := UTF16FromString(s) if err != nil { return nil, err } return &a[0], nil } func Getpagesize() int { return 4096 } // NewCallback converts a Go function to a function pointer conforming to the stdcall calling convention. // This is useful when interoperating with Windows code requiring callbacks. func NewCallback(fn interface{}) uintptr { return syscall.NewCallback(fn) } // NewCallbackCDecl converts a Go function to a function pointer conforming to the cdecl calling convention. // This is useful when interoperating with Windows code requiring callbacks. func NewCallbackCDecl(fn interface{}) uintptr { return syscall.NewCallbackCDecl(fn) } // windows api calls //sys GetLastError() (lasterr error) //sys LoadLibrary(libname string) (handle Handle, err error) = LoadLibraryW //sys LoadLibraryEx(libname string, zero Handle, flags uintptr) (handle Handle, err error) = LoadLibraryExW //sys FreeLibrary(handle Handle) (err error) //sys GetProcAddress(module Handle, procname string) (proc uintptr, err error) //sys GetVersion() (ver uint32, err error) //sys FormatMessage(flags uint32, msgsrc uintptr, msgid uint32, langid uint32, buf []uint16, args *byte) (n uint32, err error) = FormatMessageW //sys ExitProcess(exitcode uint32) //sys CreateFile(name *uint16, access uint32, mode uint32, sa *SecurityAttributes, createmode uint32, attrs uint32, templatefile int32) (handle Handle, err error) [failretval==InvalidHandle] = CreateFileW //sys ReadFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error) //sys WriteFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error) //sys SetFilePointer(handle Handle, lowoffset int32, highoffsetptr *int32, whence uint32) (newlowoffset uint32, err error) [failretval==0xffffffff] //sys CloseHandle(handle Handle) (err error) //sys GetStdHandle(stdhandle uint32) (handle Handle, err error) [failretval==InvalidHandle] //sys SetStdHandle(stdhandle uint32, handle Handle) (err error) //sys findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstFileW //sys findNextFile1(handle Handle, data *win32finddata1) (err error) = FindNextFileW //sys FindClose(handle Handle) (err error) //sys GetFileInformationByHandle(handle Handle, data *ByHandleFileInformation) (err error) //sys GetCurrentDirectory(buflen uint32, buf *uint16) (n uint32, err error) = GetCurrentDirectoryW //sys SetCurrentDirectory(path *uint16) (err error) = SetCurrentDirectoryW //sys CreateDirectory(path *uint16, sa *SecurityAttributes) (err error) = CreateDirectoryW //sys RemoveDirectory(path *uint16) (err error) = RemoveDirectoryW //sys DeleteFile(path *uint16) (err error) = DeleteFileW //sys MoveFile(from *uint16, to *uint16) (err error) = MoveFileW //sys MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW //sys GetComputerName(buf *uint16, n *uint32) (err error) = GetComputerNameW //sys GetComputerNameEx(nametype uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW //sys SetEndOfFile(handle Handle) (err error) //sys GetSystemTimeAsFileTime(time *Filetime) //sys GetSystemTimePreciseAsFileTime(time *Filetime) //sys GetTimeZoneInformation(tzi *Timezoneinformation) (rc uint32, err error) [failretval==0xffffffff] //sys CreateIoCompletionPort(filehandle Handle, cphandle Handle, key uint32, threadcnt uint32) (handle Handle, err error) //sys GetQueuedCompletionStatus(cphandle Handle, qty *uint32, key *uint32, overlapped **Overlapped, timeout uint32) (err error) //sys PostQueuedCompletionStatus(cphandle Handle, qty uint32, key uint32, overlapped *Overlapped) (err error) //sys CancelIo(s Handle) (err error) //sys CancelIoEx(s Handle, o *Overlapped) (err error) //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 //sys OpenProcess(da uint32, inheritHandle bool, pid uint32) (handle Handle, err error) //sys TerminateProcess(handle Handle, exitcode uint32) (err error) //sys GetExitCodeProcess(handle Handle, exitcode *uint32) (err error) //sys GetStartupInfo(startupInfo *StartupInfo) (err error) = GetStartupInfoW //sys GetCurrentProcess() (pseudoHandle Handle, err error) //sys GetProcessTimes(handle Handle, creationTime *Filetime, exitTime *Filetime, kernelTime *Filetime, userTime *Filetime) (err error) //sys DuplicateHandle(hSourceProcessHandle Handle, hSourceHandle Handle, hTargetProcessHandle Handle, lpTargetHandle *Handle, dwDesiredAccess uint32, bInheritHandle bool, dwOptions uint32) (err error) //sys WaitForSingleObject(handle Handle, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff] //sys GetTempPath(buflen uint32, buf *uint16) (n uint32, err error) = GetTempPathW //sys CreatePipe(readhandle *Handle, writehandle *Handle, sa *SecurityAttributes, size uint32) (err error) //sys GetFileType(filehandle Handle) (n uint32, err error) //sys CryptAcquireContext(provhandle *Handle, container *uint16, provider *uint16, provtype uint32, flags uint32) (err error) = advapi32.CryptAcquireContextW //sys CryptReleaseContext(provhandle Handle, flags uint32) (err error) = advapi32.CryptReleaseContext //sys CryptGenRandom(provhandle Handle, buflen uint32, buf *byte) (err error) = advapi32.CryptGenRandom //sys GetEnvironmentStrings() (envs *uint16, err error) [failretval==nil] = kernel32.GetEnvironmentStringsW //sys FreeEnvironmentStrings(envs *uint16) (err error) = kernel32.FreeEnvironmentStringsW //sys GetEnvironmentVariable(name *uint16, buffer *uint16, size uint32) (n uint32, err error) = kernel32.GetEnvironmentVariableW //sys SetEnvironmentVariable(name *uint16, value *uint16) (err error) = kernel32.SetEnvironmentVariableW //sys SetFileTime(handle Handle, ctime *Filetime, atime *Filetime, wtime *Filetime) (err error) //sys GetFileAttributes(name *uint16) (attrs uint32, err error) [failretval==INVALID_FILE_ATTRIBUTES] = kernel32.GetFileAttributesW //sys SetFileAttributes(name *uint16, attrs uint32) (err error) = kernel32.SetFileAttributesW //sys GetFileAttributesEx(name *uint16, level uint32, info *byte) (err error) = kernel32.GetFileAttributesExW //sys GetCommandLine() (cmd *uint16) = kernel32.GetCommandLineW //sys CommandLineToArgv(cmd *uint16, argc *int32) (argv *[8192]*[8192]uint16, err error) [failretval==nil] = shell32.CommandLineToArgvW //sys LocalFree(hmem Handle) (handle Handle, err error) [failretval!=0] //sys SetHandleInformation(handle Handle, mask uint32, flags uint32) (err error) //sys FlushFileBuffers(handle Handle) (err error) //sys GetFullPathName(path *uint16, buflen uint32, buf *uint16, fname **uint16) (n uint32, err error) = kernel32.GetFullPathNameW //sys GetLongPathName(path *uint16, buf *uint16, buflen uint32) (n uint32, err error) = kernel32.GetLongPathNameW //sys GetShortPathName(longpath *uint16, shortpath *uint16, buflen uint32) (n uint32, err error) = kernel32.GetShortPathNameW //sys CreateFileMapping(fhandle Handle, sa *SecurityAttributes, prot uint32, maxSizeHigh uint32, maxSizeLow uint32, name *uint16) (handle Handle, err error) = kernel32.CreateFileMappingW //sys MapViewOfFile(handle Handle, access uint32, offsetHigh uint32, offsetLow uint32, length uintptr) (addr uintptr, err error) //sys UnmapViewOfFile(addr uintptr) (err error) //sys FlushViewOfFile(addr uintptr, length uintptr) (err error) //sys VirtualLock(addr uintptr, length uintptr) (err error) //sys VirtualUnlock(addr uintptr, length uintptr) (err error) //sys VirtualAlloc(address uintptr, size uintptr, alloctype uint32, protect uint32) (value uintptr, err error) = kernel32.VirtualAlloc //sys VirtualFree(address uintptr, size uintptr, freetype uint32) (err error) = kernel32.VirtualFree //sys VirtualProtect(address uintptr, size uintptr, newprotect uint32, oldprotect *uint32) (err error) = kernel32.VirtualProtect //sys TransmitFile(s Handle, handle Handle, bytesToWrite uint32, bytsPerSend uint32, overlapped *Overlapped, transmitFileBuf *TransmitFileBuffers, flags uint32) (err error) = mswsock.TransmitFile //sys ReadDirectoryChanges(handle Handle, buf *byte, buflen uint32, watchSubTree bool, mask uint32, retlen *uint32, overlapped *Overlapped, completionRoutine uintptr) (err error) = kernel32.ReadDirectoryChangesW //sys CertOpenSystemStore(hprov Handle, name *uint16) (store Handle, err error) = crypt32.CertOpenSystemStoreW //sys CertOpenStore(storeProvider uintptr, msgAndCertEncodingType uint32, cryptProv uintptr, flags uint32, para uintptr) (handle Handle, err error) [failretval==InvalidHandle] = crypt32.CertOpenStore //sys CertEnumCertificatesInStore(store Handle, prevContext *CertContext) (context *CertContext, err error) [failretval==nil] = crypt32.CertEnumCertificatesInStore //sys CertAddCertificateContextToStore(store Handle, certContext *CertContext, addDisposition uint32, storeContext **CertContext) (err error) = crypt32.CertAddCertificateContextToStore //sys CertCloseStore(store Handle, flags uint32) (err error) = crypt32.CertCloseStore //sys CertGetCertificateChain(engine Handle, leaf *CertContext, time *Filetime, additionalStore Handle, para *CertChainPara, flags uint32, reserved uintptr, chainCtx **CertChainContext) (err error) = crypt32.CertGetCertificateChain //sys CertFreeCertificateChain(ctx *CertChainContext) = crypt32.CertFreeCertificateChain //sys CertCreateCertificateContext(certEncodingType uint32, certEncoded *byte, encodedLen uint32) (context *CertContext, err error) [failretval==nil] = crypt32.CertCreateCertificateContext //sys CertFreeCertificateContext(ctx *CertContext) (err error) = crypt32.CertFreeCertificateContext //sys CertVerifyCertificateChainPolicy(policyOID uintptr, chain *CertChainContext, para *CertChainPolicyPara, status *CertChainPolicyStatus) (err error) = crypt32.CertVerifyCertificateChainPolicy //sys RegOpenKeyEx(key Handle, subkey *uint16, options uint32, desiredAccess uint32, result *Handle) (regerrno error) = advapi32.RegOpenKeyExW //sys RegCloseKey(key Handle) (regerrno error) = advapi32.RegCloseKey //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 //sys RegEnumKeyEx(key Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, class *uint16, classLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegEnumKeyExW //sys RegQueryValueEx(key Handle, name *uint16, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) = advapi32.RegQueryValueExW //sys getCurrentProcessId() (pid uint32) = kernel32.GetCurrentProcessId //sys GetConsoleMode(console Handle, mode *uint32) (err error) = kernel32.GetConsoleMode //sys SetConsoleMode(console Handle, mode uint32) (err error) = kernel32.SetConsoleMode //sys GetConsoleScreenBufferInfo(console Handle, info *ConsoleScreenBufferInfo) (err error) = kernel32.GetConsoleScreenBufferInfo //sys WriteConsole(console Handle, buf *uint16, towrite uint32, written *uint32, reserved *byte) (err error) = kernel32.WriteConsoleW //sys ReadConsole(console Handle, buf *uint16, toread uint32, read *uint32, inputControl *byte) (err error) = kernel32.ReadConsoleW //sys CreateToolhelp32Snapshot(flags uint32, processId uint32) (handle Handle, err error) [failretval==InvalidHandle] = kernel32.CreateToolhelp32Snapshot //sys Process32First(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32FirstW //sys Process32Next(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32NextW //sys DeviceIoControl(handle Handle, ioControlCode uint32, inBuffer *byte, inBufferSize uint32, outBuffer *byte, outBufferSize uint32, bytesReturned *uint32, overlapped *Overlapped) (err error) // This function returns 1 byte BOOLEAN rather than the 4 byte BOOL. //sys CreateSymbolicLink(symlinkfilename *uint16, targetfilename *uint16, flags uint32) (err error) [failretval&0xff==0] = CreateSymbolicLinkW //sys CreateHardLink(filename *uint16, existingfilename *uint16, reserved uintptr) (err error) [failretval&0xff==0] = CreateHardLinkW //sys GetCurrentThreadId() (id uint32) //sys CreateEvent(eventAttrs *SecurityAttributes, manualReset uint32, initialState uint32, name *uint16) (handle Handle, err error) = kernel32.CreateEventW //sys CreateEventEx(eventAttrs *SecurityAttributes, name *uint16, flags uint32, desiredAccess uint32) (handle Handle, err error) = kernel32.CreateEventExW //sys OpenEvent(desiredAccess uint32, inheritHandle bool, name *uint16) (handle Handle, err error) = kernel32.OpenEventW //sys SetEvent(event Handle) (err error) = kernel32.SetEvent //sys ResetEvent(event Handle) (err error) = kernel32.ResetEvent //sys PulseEvent(event Handle) (err error) = kernel32.PulseEvent // Volume Management Functions //sys DefineDosDevice(flags uint32, deviceName *uint16, targetPath *uint16) (err error) = DefineDosDeviceW //sys DeleteVolumeMountPoint(volumeMountPoint *uint16) (err error) = DeleteVolumeMountPointW //sys FindFirstVolume(volumeName *uint16, bufferLength uint32) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstVolumeW //sys FindFirstVolumeMountPoint(rootPathName *uint16, volumeMountPoint *uint16, bufferLength uint32) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstVolumeMountPointW //sys FindNextVolume(findVolume Handle, volumeName *uint16, bufferLength uint32) (err error) = FindNextVolumeW //sys FindNextVolumeMountPoint(findVolumeMountPoint Handle, volumeMountPoint *uint16, bufferLength uint32) (err error) = FindNextVolumeMountPointW //sys FindVolumeClose(findVolume Handle) (err error) //sys FindVolumeMountPointClose(findVolumeMountPoint Handle) (err error) //sys GetDriveType(rootPathName *uint16) (driveType uint32) = GetDriveTypeW //sys GetLogicalDrives() (drivesBitMask uint32, err error) [failretval==0] //sys GetLogicalDriveStrings(bufferLength uint32, buffer *uint16) (n uint32, err error) [failretval==0] = GetLogicalDriveStringsW //sys GetVolumeInformation(rootPathName *uint16, volumeNameBuffer *uint16, volumeNameSize uint32, volumeNameSerialNumber *uint32, maximumComponentLength *uint32, fileSystemFlags *uint32, fileSystemNameBuffer *uint16, fileSystemNameSize uint32) (err error) = GetVolumeInformationW //sys GetVolumeInformationByHandle(file Handle, volumeNameBuffer *uint16, volumeNameSize uint32, volumeNameSerialNumber *uint32, maximumComponentLength *uint32, fileSystemFlags *uint32, fileSystemNameBuffer *uint16, fileSystemNameSize uint32) (err error) = GetVolumeInformationByHandleW //sys GetVolumeNameForVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16, bufferlength uint32) (err error) = GetVolumeNameForVolumeMountPointW //sys GetVolumePathName(fileName *uint16, volumePathName *uint16, bufferLength uint32) (err error) = GetVolumePathNameW //sys GetVolumePathNamesForVolumeName(volumeName *uint16, volumePathNames *uint16, bufferLength uint32, returnLength *uint32) (err error) = GetVolumePathNamesForVolumeNameW //sys QueryDosDevice(deviceName *uint16, targetPath *uint16, max uint32) (n uint32, err error) [failretval==0] = QueryDosDeviceW //sys SetVolumeLabel(rootPathName *uint16, volumeName *uint16) (err error) = SetVolumeLabelW //sys SetVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16) (err error) = SetVolumeMountPointW // syscall interface implementation for other packages // GetProcAddressByOrdinal retrieves the address of the exported // function from module by ordinal. func GetProcAddressByOrdinal(module Handle, ordinal uintptr) (proc uintptr, err error) { r0, _, e1 := syscall.Syscall(procGetProcAddress.Addr(), 2, uintptr(module), ordinal, 0) proc = uintptr(r0) if proc == 0 { if e1 != 0 { err = errnoErr(e1) } else { err = syscall.EINVAL } } return } func Exit(code int) { ExitProcess(uint32(code)) } func makeInheritSa() *SecurityAttributes { var sa SecurityAttributes sa.Length = uint32(unsafe.Sizeof(sa)) sa.InheritHandle = 1 return &sa } func Open(path string, mode int, perm uint32) (fd Handle, err error) { if len(path) == 0 { return InvalidHandle, ERROR_FILE_NOT_FOUND } pathp, err := UTF16PtrFromString(path) if err != nil { return InvalidHandle, err } var access uint32 switch mode & (O_RDONLY | O_WRONLY | O_RDWR) { case O_RDONLY: access = GENERIC_READ case O_WRONLY: access = GENERIC_WRITE case O_RDWR: access = GENERIC_READ | GENERIC_WRITE } if mode&O_CREAT != 0 { access |= GENERIC_WRITE } if mode&O_APPEND != 0 { access &^= GENERIC_WRITE access |= FILE_APPEND_DATA } sharemode := uint32(FILE_SHARE_READ | FILE_SHARE_WRITE) var sa *SecurityAttributes if mode&O_CLOEXEC == 0 { sa = makeInheritSa() } var createmode uint32 switch { case mode&(O_CREAT|O_EXCL) == (O_CREAT | O_EXCL): createmode = CREATE_NEW case mode&(O_CREAT|O_TRUNC) == (O_CREAT | O_TRUNC): createmode = CREATE_ALWAYS case mode&O_CREAT == O_CREAT: createmode = OPEN_ALWAYS case mode&O_TRUNC == O_TRUNC: createmode = TRUNCATE_EXISTING default: createmode = OPEN_EXISTING } h, e := CreateFile(pathp, access, sharemode, sa, createmode, FILE_ATTRIBUTE_NORMAL, 0) return h, e } func Read(fd Handle, p []byte) (n int, err error) { var done uint32 e := ReadFile(fd, p, &done, nil) if e != nil { if e == ERROR_BROKEN_PIPE { // NOTE(brainman): work around ERROR_BROKEN_PIPE is returned on reading EOF from stdin return 0, nil } return 0, e } if raceenabled { if done > 0 { raceWriteRange(unsafe.Pointer(&p[0]), int(done)) } raceAcquire(unsafe.Pointer(&ioSync)) } return int(done), nil } func Write(fd Handle, p []byte) (n int, err error) { if raceenabled { raceReleaseMerge(unsafe.Pointer(&ioSync)) } var done uint32 e := WriteFile(fd, p, &done, nil) if e != nil { return 0, e } if raceenabled && done > 0 { raceReadRange(unsafe.Pointer(&p[0]), int(done)) } return int(done), nil } var ioSync int64 func Seek(fd Handle, offset int64, whence int) (newoffset int64, err error) { var w uint32 switch whence { case 0: w = FILE_BEGIN case 1: w = FILE_CURRENT case 2: w = FILE_END } hi := int32(offset >> 32) lo := int32(offset) // use GetFileType to check pipe, pipe can't do seek ft, _ := GetFileType(fd) if ft == FILE_TYPE_PIPE { return 0, syscall.EPIPE } rlo, e := SetFilePointer(fd, lo, &hi, w) if e != nil { return 0, e } return int64(hi)<<32 + int64(rlo), nil } func Close(fd Handle) (err error) { return CloseHandle(fd) } var ( Stdin = getStdHandle(STD_INPUT_HANDLE) Stdout = getStdHandle(STD_OUTPUT_HANDLE) Stderr = getStdHandle(STD_ERROR_HANDLE) ) func getStdHandle(stdhandle uint32) (fd Handle) { r, _ := GetStdHandle(stdhandle) CloseOnExec(r) return r } const ImplementsGetwd = true func Getwd() (wd string, err error) { b := make([]uint16, 300) n, e := GetCurrentDirectory(uint32(len(b)), &b[0]) if e != nil { return "", e } return string(utf16.Decode(b[0:n])), nil } func Chdir(path string) (err error) { pathp, err := UTF16PtrFromString(path) if err != nil { return err } return SetCurrentDirectory(pathp) } func Mkdir(path string, mode uint32) (err error) { pathp, err := UTF16PtrFromString(path) if err != nil { return err } return CreateDirectory(pathp, nil) } func Rmdir(path string) (err error) { pathp, err := UTF16PtrFromString(path) if err != nil { return err } return RemoveDirectory(pathp) } func Unlink(path string) (err error) { pathp, err := UTF16PtrFromString(path) if err != nil { return err } return DeleteFile(pathp) } func Rename(oldpath, newpath string) (err error) { from, err := UTF16PtrFromString(oldpath) if err != nil { return err } to, err := UTF16PtrFromString(newpath) if err != nil { return err } return MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING) } func ComputerName() (name string, err error) { var n uint32 = MAX_COMPUTERNAME_LENGTH + 1 b := make([]uint16, n) e := GetComputerName(&b[0], &n) if e != nil { return "", e } return string(utf16.Decode(b[0:n])), nil } func Ftruncate(fd Handle, length int64) (err error) { curoffset, e := Seek(fd, 0, 1) if e != nil { return e } defer Seek(fd, curoffset, 0) _, e = Seek(fd, length, 0) if e != nil { return e } e = SetEndOfFile(fd) if e != nil { return e } return nil } func Gettimeofday(tv *Timeval) (err error) { var ft Filetime GetSystemTimeAsFileTime(&ft) *tv = NsecToTimeval(ft.Nanoseconds()) return nil } func Pipe(p []Handle) (err error) { if len(p) != 2 { return syscall.EINVAL } var r, w Handle e := CreatePipe(&r, &w, makeInheritSa(), 0) if e != nil { return e } p[0] = r p[1] = w return nil } func Utimes(path string, tv []Timeval) (err error) { if len(tv) != 2 { return syscall.EINVAL } pathp, e := UTF16PtrFromString(path) if e != nil { return e } h, e := CreateFile(pathp, FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0) if e != nil { return e } defer Close(h) a := NsecToFiletime(tv[0].Nanoseconds()) w := NsecToFiletime(tv[1].Nanoseconds()) return SetFileTime(h, nil, &a, &w) } func UtimesNano(path string, ts []Timespec) (err error) { if len(ts) != 2 { return syscall.EINVAL } pathp, e := UTF16PtrFromString(path) if e != nil { return e } h, e := CreateFile(pathp, FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0) if e != nil { return e } defer Close(h) a := NsecToFiletime(TimespecToNsec(ts[0])) w := NsecToFiletime(TimespecToNsec(ts[1])) return SetFileTime(h, nil, &a, &w) } func Fsync(fd Handle) (err error) { return FlushFileBuffers(fd) } func Chmod(path string, mode uint32) (err error) { if mode == 0 { return syscall.EINVAL } p, e := UTF16PtrFromString(path) if e != nil { return e } attrs, e := GetFileAttributes(p) if e != nil { return e } if mode&S_IWRITE != 0 { attrs &^= FILE_ATTRIBUTE_READONLY } else { attrs |= FILE_ATTRIBUTE_READONLY } return SetFileAttributes(p, attrs) } func LoadGetSystemTimePreciseAsFileTime() error { return procGetSystemTimePreciseAsFileTime.Find() } func LoadCancelIoEx() error { return procCancelIoEx.Find() } func LoadSetFileCompletionNotificationModes() error { return procSetFileCompletionNotificationModes.Find() } // net api calls const socket_error = uintptr(^uint32(0)) //sys WSAStartup(verreq uint32, data *WSAData) (sockerr error) = ws2_32.WSAStartup //sys WSACleanup() (err error) [failretval==socket_error] = ws2_32.WSACleanup //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 //sys socket(af int32, typ int32, protocol int32) (handle Handle, err error) [failretval==InvalidHandle] = ws2_32.socket //sys Setsockopt(s Handle, level int32, optname int32, optval *byte, optlen int32) (err error) [failretval==socket_error] = ws2_32.setsockopt //sys Getsockopt(s Handle, level int32, optname int32, optval *byte, optlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockopt //sys bind(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.bind //sys connect(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.connect //sys getsockname(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockname //sys getpeername(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getpeername //sys listen(s Handle, backlog int32) (err error) [failretval==socket_error] = ws2_32.listen //sys shutdown(s Handle, how int32) (err error) [failretval==socket_error] = ws2_32.shutdown //sys Closesocket(s Handle) (err error) [failretval==socket_error] = ws2_32.closesocket //sys AcceptEx(ls Handle, as Handle, buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, recvd *uint32, overlapped *Overlapped) (err error) = mswsock.AcceptEx //sys GetAcceptExSockaddrs(buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, lrsa **RawSockaddrAny, lrsalen *int32, rrsa **RawSockaddrAny, rrsalen *int32) = mswsock.GetAcceptExSockaddrs //sys WSARecv(s Handle, bufs *WSABuf, bufcnt uint32, recvd *uint32, flags *uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSARecv //sys WSASend(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSASend //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 //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 //sys GetHostByName(name string) (h *Hostent, err error) [failretval==nil] = ws2_32.gethostbyname //sys GetServByName(name string, proto string) (s *Servent, err error) [failretval==nil] = ws2_32.getservbyname //sys Ntohs(netshort uint16) (u uint16) = ws2_32.ntohs //sys GetProtoByName(name string) (p *Protoent, err error) [failretval==nil] = ws2_32.getprotobyname //sys DnsQuery(name string, qtype uint16, options uint32, extra *byte, qrs **DNSRecord, pr *byte) (status error) = dnsapi.DnsQuery_W //sys DnsRecordListFree(rl *DNSRecord, freetype uint32) = dnsapi.DnsRecordListFree //sys DnsNameCompare(name1 *uint16, name2 *uint16) (same bool) = dnsapi.DnsNameCompare_W //sys GetAddrInfoW(nodename *uint16, servicename *uint16, hints *AddrinfoW, result **AddrinfoW) (sockerr error) = ws2_32.GetAddrInfoW //sys FreeAddrInfoW(addrinfo *AddrinfoW) = ws2_32.FreeAddrInfoW //sys GetIfEntry(pIfRow *MibIfRow) (errcode error) = iphlpapi.GetIfEntry //sys GetAdaptersInfo(ai *IpAdapterInfo, ol *uint32) (errcode error) = iphlpapi.GetAdaptersInfo //sys SetFileCompletionNotificationModes(handle Handle, flags uint8) (err error) = kernel32.SetFileCompletionNotificationModes //sys WSAEnumProtocols(protocols *int32, protocolBuffer *WSAProtocolInfo, bufferLength *uint32) (n int32, err error) [failretval==-1] = ws2_32.WSAEnumProtocolsW //sys GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses //sys GetACP() (acp uint32) = kernel32.GetACP //sys MultiByteToWideChar(codePage uint32, dwFlags uint32, str *byte, nstr int32, wchar *uint16, nwchar int32) (nwrite int32, err error) = kernel32.MultiByteToWideChar // For testing: clients can set this flag to force // creation of IPv6 sockets to return EAFNOSUPPORT. var SocketDisableIPv6 bool type RawSockaddrInet4 struct { Family uint16 Port uint16 Addr [4]byte /* in_addr */ Zero [8]uint8 } type RawSockaddrInet6 struct { Family uint16 Port uint16 Flowinfo uint32 Addr [16]byte /* in6_addr */ Scope_id uint32 } type RawSockaddr struct { Family uint16 Data [14]int8 } type RawSockaddrAny struct { Addr RawSockaddr Pad [96]int8 } type Sockaddr interface { sockaddr() (ptr unsafe.Pointer, len int32, err error) // lowercase; only we can define Sockaddrs } type SockaddrInet4 struct { Port int Addr [4]byte raw RawSockaddrInet4 } func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, int32, error) { if sa.Port < 0 || sa.Port > 0xFFFF { return nil, 0, syscall.EINVAL } sa.raw.Family = AF_INET p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) p[0] = byte(sa.Port >> 8) p[1] = byte(sa.Port) for i := 0; i < len(sa.Addr); i++ { sa.raw.Addr[i] = sa.Addr[i] } return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil } type SockaddrInet6 struct { Port int ZoneId uint32 Addr [16]byte raw RawSockaddrInet6 } func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, int32, error) { if sa.Port < 0 || sa.Port > 0xFFFF { return nil, 0, syscall.EINVAL } sa.raw.Family = AF_INET6 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) p[0] = byte(sa.Port >> 8) p[1] = byte(sa.Port) sa.raw.Scope_id = sa.ZoneId for i := 0; i < len(sa.Addr); i++ { sa.raw.Addr[i] = sa.Addr[i] } return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil } type SockaddrUnix struct { Name string } func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, int32, error) { // TODO(brainman): implement SockaddrUnix.sockaddr() return nil, 0, syscall.EWINDOWS } func (rsa *RawSockaddrAny) Sockaddr() (Sockaddr, error) { switch rsa.Addr.Family { case AF_UNIX: return nil, syscall.EWINDOWS case AF_INET: pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) sa := new(SockaddrInet4) p := (*[2]byte)(unsafe.Pointer(&pp.Port)) sa.Port = int(p[0])<<8 + int(p[1]) for i := 0; i < len(sa.Addr); i++ { sa.Addr[i] = pp.Addr[i] } return sa, nil case AF_INET6: pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) sa := new(SockaddrInet6) p := (*[2]byte)(unsafe.Pointer(&pp.Port)) sa.Port = int(p[0])<<8 + int(p[1]) sa.ZoneId = pp.Scope_id for i := 0; i < len(sa.Addr); i++ { sa.Addr[i] = pp.Addr[i] } return sa, nil } return nil, syscall.EAFNOSUPPORT } func Socket(domain, typ, proto int) (fd Handle, err error) { if domain == AF_INET6 && SocketDisableIPv6 { return InvalidHandle, syscall.EAFNOSUPPORT } return socket(int32(domain), int32(typ), int32(proto)) } func SetsockoptInt(fd Handle, level, opt int, value int) (err error) { v := int32(value) return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&v)), int32(unsafe.Sizeof(v))) } func Bind(fd Handle, sa Sockaddr) (err error) { ptr, n, err := sa.sockaddr() if err != nil { return err } return bind(fd, ptr, n) } func Connect(fd Handle, sa Sockaddr) (err error) { ptr, n, err := sa.sockaddr() if err != nil { return err } return connect(fd, ptr, n) } func Getsockname(fd Handle) (sa Sockaddr, err error) { var rsa RawSockaddrAny l := int32(unsafe.Sizeof(rsa)) if err = getsockname(fd, &rsa, &l); err != nil { return } return rsa.Sockaddr() } func Getpeername(fd Handle) (sa Sockaddr, err error) { var rsa RawSockaddrAny l := int32(unsafe.Sizeof(rsa)) if err = getpeername(fd, &rsa, &l); err != nil { return } return rsa.Sockaddr() } func Listen(s Handle, n int) (err error) { return listen(s, int32(n)) } func Shutdown(fd Handle, how int) (err error) { return shutdown(fd, int32(how)) } func WSASendto(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to Sockaddr, overlapped *Overlapped, croutine *byte) (err error) { rsa, l, err := to.sockaddr() if err != nil { return err } return WSASendTo(s, bufs, bufcnt, sent, flags, (*RawSockaddrAny)(unsafe.Pointer(rsa)), l, overlapped, croutine) } func LoadGetAddrInfo() error { return procGetAddrInfoW.Find() } var connectExFunc struct { once sync.Once addr uintptr err error } func LoadConnectEx() error { connectExFunc.once.Do(func() { var s Handle s, connectExFunc.err = Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP) if connectExFunc.err != nil { return } defer CloseHandle(s) var n uint32 connectExFunc.err = WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, (*byte)(unsafe.Pointer(&WSAID_CONNECTEX)), uint32(unsafe.Sizeof(WSAID_CONNECTEX)), (*byte)(unsafe.Pointer(&connectExFunc.addr)), uint32(unsafe.Sizeof(connectExFunc.addr)), &n, nil, 0) }) return connectExFunc.err } func connectEx(s Handle, name unsafe.Pointer, namelen int32, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) (err error) { 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) if r1 == 0 { if e1 != 0 { err = error(e1) } else { err = syscall.EINVAL } } return } func ConnectEx(fd Handle, sa Sockaddr, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) error { err := LoadConnectEx() if err != nil { return errorspkg.New("failed to find ConnectEx: " + err.Error()) } ptr, n, err := sa.sockaddr() if err != nil { return err } return connectEx(fd, ptr, n, sendBuf, sendDataLen, bytesSent, overlapped) } var sendRecvMsgFunc struct { once sync.Once sendAddr uintptr recvAddr uintptr err error } func loadWSASendRecvMsg() error { sendRecvMsgFunc.once.Do(func() { var s Handle s, sendRecvMsgFunc.err = Socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP) if sendRecvMsgFunc.err != nil { return } defer CloseHandle(s) var n uint32 sendRecvMsgFunc.err = WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, (*byte)(unsafe.Pointer(&WSAID_WSARECVMSG)), uint32(unsafe.Sizeof(WSAID_WSARECVMSG)), (*byte)(unsafe.Pointer(&sendRecvMsgFunc.recvAddr)), uint32(unsafe.Sizeof(sendRecvMsgFunc.recvAddr)), &n, nil, 0) if sendRecvMsgFunc.err != nil { return } sendRecvMsgFunc.err = WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, (*byte)(unsafe.Pointer(&WSAID_WSASENDMSG)), uint32(unsafe.Sizeof(WSAID_WSASENDMSG)), (*byte)(unsafe.Pointer(&sendRecvMsgFunc.sendAddr)), uint32(unsafe.Sizeof(sendRecvMsgFunc.sendAddr)), &n, nil, 0) }) return sendRecvMsgFunc.err } func WSASendMsg(fd Handle, msg *WSAMsg, flags uint32, bytesSent *uint32, overlapped *Overlapped, croutine *byte) error { err := loadWSASendRecvMsg() if err != nil { return err } 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))) if r1 == socket_error { if e1 != 0 { err = errnoErr(e1) } else { err = syscall.EINVAL } } return err } func WSARecvMsg(fd Handle, msg *WSAMsg, bytesReceived *uint32, overlapped *Overlapped, croutine *byte) error { err := loadWSASendRecvMsg() if err != nil { return err } 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) if r1 == socket_error { if e1 != 0 { err = errnoErr(e1) } else { err = syscall.EINVAL } } return err } // Invented structures to support what package os expects. type Rusage struct { CreationTime Filetime ExitTime Filetime KernelTime Filetime UserTime Filetime } type WaitStatus struct { ExitCode uint32 } func (w WaitStatus) Exited() bool { return true } func (w WaitStatus) ExitStatus() int { return int(w.ExitCode) } func (w WaitStatus) Signal() Signal { return -1 } func (w WaitStatus) CoreDump() bool { return false } func (w WaitStatus) Stopped() bool { return false } func (w WaitStatus) Continued() bool { return false } func (w WaitStatus) StopSignal() Signal { return -1 } func (w WaitStatus) Signaled() bool { return false } func (w WaitStatus) TrapCause() int { return -1 } // Timespec is an invented structure on Windows, but here for // consistency with the corresponding package for other operating systems. type Timespec struct { Sec int64 Nsec int64 } func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) } func NsecToTimespec(nsec int64) (ts Timespec) { ts.Sec = nsec / 1e9 ts.Nsec = nsec % 1e9 return } // TODO(brainman): fix all needed for net func Accept(fd Handle) (nfd Handle, sa Sockaddr, err error) { return 0, nil, syscall.EWINDOWS } func Recvfrom(fd Handle, p []byte, flags int) (n int, from Sockaddr, err error) { return 0, nil, syscall.EWINDOWS } func Sendto(fd Handle, p []byte, flags int, to Sockaddr) (err error) { return syscall.EWINDOWS } func SetsockoptTimeval(fd Handle, level, opt int, tv *Timeval) (err error) { return syscall.EWINDOWS } // The Linger struct is wrong but we only noticed after Go 1. // sysLinger is the real system call structure. // BUG(brainman): The definition of Linger is not appropriate for direct use // with Setsockopt and Getsockopt. // Use SetsockoptLinger instead. type Linger struct { Onoff int32 Linger int32 } type sysLinger struct { Onoff uint16 Linger uint16 } type IPMreq struct { Multiaddr [4]byte /* in_addr */ Interface [4]byte /* in_addr */ } type IPv6Mreq struct { Multiaddr [16]byte /* in6_addr */ Interface uint32 } func GetsockoptInt(fd Handle, level, opt int) (int, error) { return -1, syscall.EWINDOWS } func SetsockoptLinger(fd Handle, level, opt int, l *Linger) (err error) { sys := sysLinger{Onoff: uint16(l.Onoff), Linger: uint16(l.Linger)} return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&sys)), int32(unsafe.Sizeof(sys))) } func SetsockoptInet4Addr(fd Handle, level, opt int, value [4]byte) (err error) { return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&value[0])), 4) } func SetsockoptIPMreq(fd Handle, level, opt int, mreq *IPMreq) (err error) { return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(mreq)), int32(unsafe.Sizeof(*mreq))) } func SetsockoptIPv6Mreq(fd Handle, level, opt int, mreq *IPv6Mreq) (err error) { return syscall.EWINDOWS } func Getpid() (pid int) { return int(getCurrentProcessId()) } func FindFirstFile(name *uint16, data *Win32finddata) (handle Handle, err error) { // NOTE(rsc): The Win32finddata struct is wrong for the system call: // the two paths are each one uint16 short. Use the correct struct, // a win32finddata1, and then copy the results out. // There is no loss of expressivity here, because the final // uint16, if it is used, is supposed to be a NUL, and Go doesn't need that. // For Go 1.1, we might avoid the allocation of win32finddata1 here // by adding a final Bug [2]uint16 field to the struct and then // adjusting the fields in the result directly. var data1 win32finddata1 handle, err = findFirstFile1(name, &data1) if err == nil { copyFindData(data, &data1) } return } func FindNextFile(handle Handle, data *Win32finddata) (err error) { var data1 win32finddata1 err = findNextFile1(handle, &data1) if err == nil { copyFindData(data, &data1) } return } func getProcessEntry(pid int) (*ProcessEntry32, error) { snapshot, err := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0) if err != nil { return nil, err } defer CloseHandle(snapshot) var procEntry ProcessEntry32 procEntry.Size = uint32(unsafe.Sizeof(procEntry)) if err = Process32First(snapshot, &procEntry); err != nil { return nil, err } for { if procEntry.ProcessID == uint32(pid) { return &procEntry, nil } err = Process32Next(snapshot, &procEntry) if err != nil { return nil, err } } } func Getppid() (ppid int) { pe, err := getProcessEntry(Getpid()) if err != nil { return -1 } return int(pe.ParentProcessID) } // TODO(brainman): fix all needed for os func Fchdir(fd Handle) (err error) { return syscall.EWINDOWS } func Link(oldpath, newpath string) (err error) { return syscall.EWINDOWS } func Symlink(path, link string) (err error) { return syscall.EWINDOWS } func Fchmod(fd Handle, mode uint32) (err error) { return syscall.EWINDOWS } func Chown(path string, uid int, gid int) (err error) { return syscall.EWINDOWS } func Lchown(path string, uid int, gid int) (err error) { return syscall.EWINDOWS } func Fchown(fd Handle, uid int, gid int) (err error) { return syscall.EWINDOWS } func Getuid() (uid int) { return -1 } func Geteuid() (euid int) { return -1 } func Getgid() (gid int) { return -1 } func Getegid() (egid int) { return -1 } func Getgroups() (gids []int, err error) { return nil, syscall.EWINDOWS } type Signal int func (s Signal) Signal() {} func (s Signal) String() string { if 0 <= s && int(s) < len(signals) { str := signals[s] if str != "" { return str } } return "signal " + itoa(int(s)) } func LoadCreateSymbolicLink() error { return procCreateSymbolicLinkW.Find() } // Readlink returns the destination of the named symbolic link. func Readlink(path string, buf []byte) (n int, err error) { fd, err := CreateFile(StringToUTF16Ptr(path), GENERIC_READ, 0, nil, OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, 0) if err != nil { return -1, err } defer CloseHandle(fd) rdbbuf := make([]byte, MAXIMUM_REPARSE_DATA_BUFFER_SIZE) var bytesReturned uint32 err = DeviceIoControl(fd, FSCTL_GET_REPARSE_POINT, nil, 0, &rdbbuf[0], uint32(len(rdbbuf)), &bytesReturned, nil) if err != nil { return -1, err } rdb := (*reparseDataBuffer)(unsafe.Pointer(&rdbbuf[0])) var s string switch rdb.ReparseTag { case IO_REPARSE_TAG_SYMLINK: data := (*symbolicLinkReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer)) p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0])) s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2]) case IO_REPARSE_TAG_MOUNT_POINT: data := (*mountPointReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer)) p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0])) s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2]) default: // the path is not a symlink or junction but another type of reparse // point return -1, syscall.ENOENT } n = copy(buf, []byte(s)) return n, nil }