github.com/ie310mu/ie310go/forks/golang.org/x/sys@v0.0.0-20190821095322-9a46783d4de5/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  	"time"
    14  	"unicode/utf16"
    15  	"unsafe"
    16  )
    17  
    18  type Handle uintptr
    19  
    20  const (
    21  	InvalidHandle = ^Handle(0)
    22  
    23  	// Flags for DefineDosDevice.
    24  	DDD_EXACT_MATCH_ON_REMOVE = 0x00000004
    25  	DDD_NO_BROADCAST_SYSTEM   = 0x00000008
    26  	DDD_RAW_TARGET_PATH       = 0x00000001
    27  	DDD_REMOVE_DEFINITION     = 0x00000002
    28  
    29  	// Return values for GetDriveType.
    30  	DRIVE_UNKNOWN     = 0
    31  	DRIVE_NO_ROOT_DIR = 1
    32  	DRIVE_REMOVABLE   = 2
    33  	DRIVE_FIXED       = 3
    34  	DRIVE_REMOTE      = 4
    35  	DRIVE_CDROM       = 5
    36  	DRIVE_RAMDISK     = 6
    37  
    38  	// File system flags from GetVolumeInformation and GetVolumeInformationByHandle.
    39  	FILE_CASE_SENSITIVE_SEARCH        = 0x00000001
    40  	FILE_CASE_PRESERVED_NAMES         = 0x00000002
    41  	FILE_FILE_COMPRESSION             = 0x00000010
    42  	FILE_DAX_VOLUME                   = 0x20000000
    43  	FILE_NAMED_STREAMS                = 0x00040000
    44  	FILE_PERSISTENT_ACLS              = 0x00000008
    45  	FILE_READ_ONLY_VOLUME             = 0x00080000
    46  	FILE_SEQUENTIAL_WRITE_ONCE        = 0x00100000
    47  	FILE_SUPPORTS_ENCRYPTION          = 0x00020000
    48  	FILE_SUPPORTS_EXTENDED_ATTRIBUTES = 0x00800000
    49  	FILE_SUPPORTS_HARD_LINKS          = 0x00400000
    50  	FILE_SUPPORTS_OBJECT_IDS          = 0x00010000
    51  	FILE_SUPPORTS_OPEN_BY_FILE_ID     = 0x01000000
    52  	FILE_SUPPORTS_REPARSE_POINTS      = 0x00000080
    53  	FILE_SUPPORTS_SPARSE_FILES        = 0x00000040
    54  	FILE_SUPPORTS_TRANSACTIONS        = 0x00200000
    55  	FILE_SUPPORTS_USN_JOURNAL         = 0x02000000
    56  	FILE_UNICODE_ON_DISK              = 0x00000004
    57  	FILE_VOLUME_IS_COMPRESSED         = 0x00008000
    58  	FILE_VOLUME_QUOTAS                = 0x00000020
    59  
    60  	// Return values of SleepEx and other APC functions
    61  	STATUS_USER_APC    = 0x000000C0
    62  	WAIT_IO_COMPLETION = STATUS_USER_APC
    63  )
    64  
    65  // StringToUTF16 is deprecated. Use UTF16FromString instead.
    66  // If s contains a NUL byte this function panics instead of
    67  // returning an error.
    68  func StringToUTF16(s string) []uint16 {
    69  	a, err := UTF16FromString(s)
    70  	if err != nil {
    71  		panic("windows: string with NUL passed to StringToUTF16")
    72  	}
    73  	return a
    74  }
    75  
    76  // UTF16FromString returns the UTF-16 encoding of the UTF-8 string
    77  // s, with a terminating NUL added. If s contains a NUL byte at any
    78  // location, it returns (nil, syscall.EINVAL).
    79  func UTF16FromString(s string) ([]uint16, error) {
    80  	for i := 0; i < len(s); i++ {
    81  		if s[i] == 0 {
    82  			return nil, syscall.EINVAL
    83  		}
    84  	}
    85  	return utf16.Encode([]rune(s + "\x00")), nil
    86  }
    87  
    88  // UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s,
    89  // with a terminating NUL removed.
    90  func UTF16ToString(s []uint16) string {
    91  	for i, v := range s {
    92  		if v == 0 {
    93  			s = s[0:i]
    94  			break
    95  		}
    96  	}
    97  	return string(utf16.Decode(s))
    98  }
    99  
   100  // StringToUTF16Ptr is deprecated. Use UTF16PtrFromString instead.
   101  // If s contains a NUL byte this function panics instead of
   102  // returning an error.
   103  func StringToUTF16Ptr(s string) *uint16 { return &StringToUTF16(s)[0] }
   104  
   105  // UTF16PtrFromString returns pointer to the UTF-16 encoding of
   106  // the UTF-8 string s, with a terminating NUL added. If s
   107  // contains a NUL byte at any location, it returns (nil, syscall.EINVAL).
   108  func UTF16PtrFromString(s string) (*uint16, error) {
   109  	a, err := UTF16FromString(s)
   110  	if err != nil {
   111  		return nil, err
   112  	}
   113  	return &a[0], nil
   114  }
   115  
   116  func Getpagesize() int { return 4096 }
   117  
   118  // NewCallback converts a Go function to a function pointer conforming to the stdcall calling convention.
   119  // This is useful when interoperating with Windows code requiring callbacks.
   120  // 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.
   121  func NewCallback(fn interface{}) uintptr {
   122  	return syscall.NewCallback(fn)
   123  }
   124  
   125  // NewCallbackCDecl converts a Go function to a function pointer conforming to the cdecl calling convention.
   126  // This is useful when interoperating with Windows code requiring callbacks.
   127  // 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.
   128  func NewCallbackCDecl(fn interface{}) uintptr {
   129  	return syscall.NewCallbackCDecl(fn)
   130  }
   131  
   132  // windows api calls
   133  
   134  //sys	GetLastError() (lasterr error)
   135  //sys	LoadLibrary(libname string) (handle Handle, err error) = LoadLibraryW
   136  //sys	LoadLibraryEx(libname string, zero Handle, flags uintptr) (handle Handle, err error) = LoadLibraryExW
   137  //sys	FreeLibrary(handle Handle) (err error)
   138  //sys	GetProcAddress(module Handle, procname string) (proc uintptr, err error)
   139  //sys	GetVersion() (ver uint32, err error)
   140  //sys	FormatMessage(flags uint32, msgsrc uintptr, msgid uint32, langid uint32, buf []uint16, args *byte) (n uint32, err error) = FormatMessageW
   141  //sys	ExitProcess(exitcode uint32)
   142  //sys	IsWow64Process(handle Handle, isWow64 *bool) (err error) = IsWow64Process
   143  //sys	CreateFile(name *uint16, access uint32, mode uint32, sa *SecurityAttributes, createmode uint32, attrs uint32, templatefile Handle) (handle Handle, err error) [failretval==InvalidHandle] = CreateFileW
   144  //sys	ReadFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error)
   145  //sys	WriteFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error)
   146  //sys	GetOverlappedResult(handle Handle, overlapped *Overlapped, done *uint32, wait bool) (err error)
   147  //sys	SetFilePointer(handle Handle, lowoffset int32, highoffsetptr *int32, whence uint32) (newlowoffset uint32, err error) [failretval==0xffffffff]
   148  //sys	CloseHandle(handle Handle) (err error)
   149  //sys	GetStdHandle(stdhandle uint32) (handle Handle, err error) [failretval==InvalidHandle]
   150  //sys	SetStdHandle(stdhandle uint32, handle Handle) (err error)
   151  //sys	findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstFileW
   152  //sys	findNextFile1(handle Handle, data *win32finddata1) (err error) = FindNextFileW
   153  //sys	FindClose(handle Handle) (err error)
   154  //sys	GetFileInformationByHandle(handle Handle, data *ByHandleFileInformation) (err error)
   155  //sys	GetFileInformationByHandleEx(handle Handle, class uint32, outBuffer *byte, outBufferLen uint32) (err error)
   156  //sys	GetCurrentDirectory(buflen uint32, buf *uint16) (n uint32, err error) = GetCurrentDirectoryW
   157  //sys	SetCurrentDirectory(path *uint16) (err error) = SetCurrentDirectoryW
   158  //sys	CreateDirectory(path *uint16, sa *SecurityAttributes) (err error) = CreateDirectoryW
   159  //sys	RemoveDirectory(path *uint16) (err error) = RemoveDirectoryW
   160  //sys	DeleteFile(path *uint16) (err error) = DeleteFileW
   161  //sys	MoveFile(from *uint16, to *uint16) (err error) = MoveFileW
   162  //sys	MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW
   163  //sys	GetComputerName(buf *uint16, n *uint32) (err error) = GetComputerNameW
   164  //sys	GetComputerNameEx(nametype uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW
   165  //sys	SetEndOfFile(handle Handle) (err error)
   166  //sys	GetSystemTimeAsFileTime(time *Filetime)
   167  //sys	GetSystemTimePreciseAsFileTime(time *Filetime)
   168  //sys	GetTimeZoneInformation(tzi *Timezoneinformation) (rc uint32, err error) [failretval==0xffffffff]
   169  //sys	CreateIoCompletionPort(filehandle Handle, cphandle Handle, key uint32, threadcnt uint32) (handle Handle, err error)
   170  //sys	GetQueuedCompletionStatus(cphandle Handle, qty *uint32, key *uint32, overlapped **Overlapped, timeout uint32) (err error)
   171  //sys	PostQueuedCompletionStatus(cphandle Handle, qty uint32, key uint32, overlapped *Overlapped) (err error)
   172  //sys	CancelIo(s Handle) (err error)
   173  //sys	CancelIoEx(s Handle, o *Overlapped) (err error)
   174  //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
   175  //sys	OpenProcess(da uint32, inheritHandle bool, pid uint32) (handle Handle, err error)
   176  //sys	ShellExecute(hwnd Handle, verb *uint16, file *uint16, args *uint16, cwd *uint16, showCmd int32) (err error) = shell32.ShellExecuteW
   177  //sys	TerminateProcess(handle Handle, exitcode uint32) (err error)
   178  //sys	GetExitCodeProcess(handle Handle, exitcode *uint32) (err error)
   179  //sys	GetStartupInfo(startupInfo *StartupInfo) (err error) = GetStartupInfoW
   180  //sys	GetCurrentProcess() (pseudoHandle Handle, err error)
   181  //sys	GetCurrentThread() (pseudoHandle Handle, err error)
   182  //sys	GetProcessTimes(handle Handle, creationTime *Filetime, exitTime *Filetime, kernelTime *Filetime, userTime *Filetime) (err error)
   183  //sys	DuplicateHandle(hSourceProcessHandle Handle, hSourceHandle Handle, hTargetProcessHandle Handle, lpTargetHandle *Handle, dwDesiredAccess uint32, bInheritHandle bool, dwOptions uint32) (err error)
   184  //sys	WaitForSingleObject(handle Handle, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff]
   185  //sys	waitForMultipleObjects(count uint32, handles uintptr, waitAll bool, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff] = WaitForMultipleObjects
   186  //sys	GetTempPath(buflen uint32, buf *uint16) (n uint32, err error) = GetTempPathW
   187  //sys	CreatePipe(readhandle *Handle, writehandle *Handle, sa *SecurityAttributes, size uint32) (err error)
   188  //sys	GetFileType(filehandle Handle) (n uint32, err error)
   189  //sys	CryptAcquireContext(provhandle *Handle, container *uint16, provider *uint16, provtype uint32, flags uint32) (err error) = advapi32.CryptAcquireContextW
   190  //sys	CryptReleaseContext(provhandle Handle, flags uint32) (err error) = advapi32.CryptReleaseContext
   191  //sys	CryptGenRandom(provhandle Handle, buflen uint32, buf *byte) (err error) = advapi32.CryptGenRandom
   192  //sys	GetEnvironmentStrings() (envs *uint16, err error) [failretval==nil] = kernel32.GetEnvironmentStringsW
   193  //sys	FreeEnvironmentStrings(envs *uint16) (err error) = kernel32.FreeEnvironmentStringsW
   194  //sys	GetEnvironmentVariable(name *uint16, buffer *uint16, size uint32) (n uint32, err error) = kernel32.GetEnvironmentVariableW
   195  //sys	SetEnvironmentVariable(name *uint16, value *uint16) (err error) = kernel32.SetEnvironmentVariableW
   196  //sys	CreateEnvironmentBlock(block **uint16, token Token, inheritExisting bool) (err error) = userenv.CreateEnvironmentBlock
   197  //sys	DestroyEnvironmentBlock(block *uint16) (err error) = userenv.DestroyEnvironmentBlock
   198  //sys	getTickCount64() (ms uint64) = kernel32.GetTickCount64
   199  //sys	SetFileTime(handle Handle, ctime *Filetime, atime *Filetime, wtime *Filetime) (err error)
   200  //sys	GetFileAttributes(name *uint16) (attrs uint32, err error) [failretval==INVALID_FILE_ATTRIBUTES] = kernel32.GetFileAttributesW
   201  //sys	SetFileAttributes(name *uint16, attrs uint32) (err error) = kernel32.SetFileAttributesW
   202  //sys	GetFileAttributesEx(name *uint16, level uint32, info *byte) (err error) = kernel32.GetFileAttributesExW
   203  //sys	GetCommandLine() (cmd *uint16) = kernel32.GetCommandLineW
   204  //sys	CommandLineToArgv(cmd *uint16, argc *int32) (argv *[8192]*[8192]uint16, err error) [failretval==nil] = shell32.CommandLineToArgvW
   205  //sys	LocalFree(hmem Handle) (handle Handle, err error) [failretval!=0]
   206  //sys	SetHandleInformation(handle Handle, mask uint32, flags uint32) (err error)
   207  //sys	FlushFileBuffers(handle Handle) (err error)
   208  //sys	GetFullPathName(path *uint16, buflen uint32, buf *uint16, fname **uint16) (n uint32, err error) = kernel32.GetFullPathNameW
   209  //sys	GetLongPathName(path *uint16, buf *uint16, buflen uint32) (n uint32, err error) = kernel32.GetLongPathNameW
   210  //sys	GetShortPathName(longpath *uint16, shortpath *uint16, buflen uint32) (n uint32, err error) = kernel32.GetShortPathNameW
   211  //sys	CreateFileMapping(fhandle Handle, sa *SecurityAttributes, prot uint32, maxSizeHigh uint32, maxSizeLow uint32, name *uint16) (handle Handle, err error) = kernel32.CreateFileMappingW
   212  //sys	MapViewOfFile(handle Handle, access uint32, offsetHigh uint32, offsetLow uint32, length uintptr) (addr uintptr, err error)
   213  //sys	UnmapViewOfFile(addr uintptr) (err error)
   214  //sys	FlushViewOfFile(addr uintptr, length uintptr) (err error)
   215  //sys	VirtualLock(addr uintptr, length uintptr) (err error)
   216  //sys	VirtualUnlock(addr uintptr, length uintptr) (err error)
   217  //sys	VirtualAlloc(address uintptr, size uintptr, alloctype uint32, protect uint32) (value uintptr, err error) = kernel32.VirtualAlloc
   218  //sys	VirtualFree(address uintptr, size uintptr, freetype uint32) (err error) = kernel32.VirtualFree
   219  //sys	VirtualProtect(address uintptr, size uintptr, newprotect uint32, oldprotect *uint32) (err error) = kernel32.VirtualProtect
   220  //sys	TransmitFile(s Handle, handle Handle, bytesToWrite uint32, bytsPerSend uint32, overlapped *Overlapped, transmitFileBuf *TransmitFileBuffers, flags uint32) (err error) = mswsock.TransmitFile
   221  //sys	ReadDirectoryChanges(handle Handle, buf *byte, buflen uint32, watchSubTree bool, mask uint32, retlen *uint32, overlapped *Overlapped, completionRoutine uintptr) (err error) = kernel32.ReadDirectoryChangesW
   222  //sys	CertOpenSystemStore(hprov Handle, name *uint16) (store Handle, err error) = crypt32.CertOpenSystemStoreW
   223  //sys   CertOpenStore(storeProvider uintptr, msgAndCertEncodingType uint32, cryptProv uintptr, flags uint32, para uintptr) (handle Handle, err error) [failretval==InvalidHandle] = crypt32.CertOpenStore
   224  //sys	CertEnumCertificatesInStore(store Handle, prevContext *CertContext) (context *CertContext, err error) [failretval==nil] = crypt32.CertEnumCertificatesInStore
   225  //sys   CertAddCertificateContextToStore(store Handle, certContext *CertContext, addDisposition uint32, storeContext **CertContext) (err error) = crypt32.CertAddCertificateContextToStore
   226  //sys	CertCloseStore(store Handle, flags uint32) (err error) = crypt32.CertCloseStore
   227  //sys   CertGetCertificateChain(engine Handle, leaf *CertContext, time *Filetime, additionalStore Handle, para *CertChainPara, flags uint32, reserved uintptr, chainCtx **CertChainContext) (err error) = crypt32.CertGetCertificateChain
   228  //sys   CertFreeCertificateChain(ctx *CertChainContext) = crypt32.CertFreeCertificateChain
   229  //sys   CertCreateCertificateContext(certEncodingType uint32, certEncoded *byte, encodedLen uint32) (context *CertContext, err error) [failretval==nil] = crypt32.CertCreateCertificateContext
   230  //sys   CertFreeCertificateContext(ctx *CertContext) (err error) = crypt32.CertFreeCertificateContext
   231  //sys   CertVerifyCertificateChainPolicy(policyOID uintptr, chain *CertChainContext, para *CertChainPolicyPara, status *CertChainPolicyStatus) (err error) = crypt32.CertVerifyCertificateChainPolicy
   232  //sys	RegOpenKeyEx(key Handle, subkey *uint16, options uint32, desiredAccess uint32, result *Handle) (regerrno error) = advapi32.RegOpenKeyExW
   233  //sys	RegCloseKey(key Handle) (regerrno error) = advapi32.RegCloseKey
   234  //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
   235  //sys	RegEnumKeyEx(key Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, class *uint16, classLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegEnumKeyExW
   236  //sys	RegQueryValueEx(key Handle, name *uint16, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) = advapi32.RegQueryValueExW
   237  //sys	GetCurrentProcessId() (pid uint32) = kernel32.GetCurrentProcessId
   238  //sys	GetConsoleMode(console Handle, mode *uint32) (err error) = kernel32.GetConsoleMode
   239  //sys	SetConsoleMode(console Handle, mode uint32) (err error) = kernel32.SetConsoleMode
   240  //sys	GetConsoleScreenBufferInfo(console Handle, info *ConsoleScreenBufferInfo) (err error) = kernel32.GetConsoleScreenBufferInfo
   241  //sys	WriteConsole(console Handle, buf *uint16, towrite uint32, written *uint32, reserved *byte) (err error) = kernel32.WriteConsoleW
   242  //sys	ReadConsole(console Handle, buf *uint16, toread uint32, read *uint32, inputControl *byte) (err error) = kernel32.ReadConsoleW
   243  //sys	CreateToolhelp32Snapshot(flags uint32, processId uint32) (handle Handle, err error) [failretval==InvalidHandle] = kernel32.CreateToolhelp32Snapshot
   244  //sys	Process32First(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32FirstW
   245  //sys	Process32Next(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32NextW
   246  //sys	Thread32First(snapshot Handle, threadEntry *ThreadEntry32) (err error)
   247  //sys	Thread32Next(snapshot Handle, threadEntry *ThreadEntry32) (err error)
   248  //sys	DeviceIoControl(handle Handle, ioControlCode uint32, inBuffer *byte, inBufferSize uint32, outBuffer *byte, outBufferSize uint32, bytesReturned *uint32, overlapped *Overlapped) (err error)
   249  // This function returns 1 byte BOOLEAN rather than the 4 byte BOOL.
   250  //sys	CreateSymbolicLink(symlinkfilename *uint16, targetfilename *uint16, flags uint32) (err error) [failretval&0xff==0] = CreateSymbolicLinkW
   251  //sys	CreateHardLink(filename *uint16, existingfilename *uint16, reserved uintptr) (err error) [failretval&0xff==0] = CreateHardLinkW
   252  //sys	GetCurrentThreadId() (id uint32)
   253  //sys	CreateEvent(eventAttrs *SecurityAttributes, manualReset uint32, initialState uint32, name *uint16) (handle Handle, err error) = kernel32.CreateEventW
   254  //sys	CreateEventEx(eventAttrs *SecurityAttributes, name *uint16, flags uint32, desiredAccess uint32) (handle Handle, err error) = kernel32.CreateEventExW
   255  //sys	OpenEvent(desiredAccess uint32, inheritHandle bool, name *uint16) (handle Handle, err error) = kernel32.OpenEventW
   256  //sys	SetEvent(event Handle) (err error) = kernel32.SetEvent
   257  //sys	ResetEvent(event Handle) (err error) = kernel32.ResetEvent
   258  //sys	PulseEvent(event Handle) (err error) = kernel32.PulseEvent
   259  //sys	SleepEx(milliseconds uint32, alertable bool) (ret uint32) = kernel32.SleepEx
   260  //sys	CreateJobObject(jobAttr *SecurityAttributes, name *uint16) (handle Handle, err error) = kernel32.CreateJobObjectW
   261  //sys	AssignProcessToJobObject(job Handle, process Handle) (err error) = kernel32.AssignProcessToJobObject
   262  //sys	TerminateJobObject(job Handle, exitCode uint32) (err error) = kernel32.TerminateJobObject
   263  //sys	SetErrorMode(mode uint32) (ret uint32) = kernel32.SetErrorMode
   264  //sys	ResumeThread(thread Handle) (ret uint32, err error) [failretval==0xffffffff] = kernel32.ResumeThread
   265  //sys	SetPriorityClass(process Handle, priorityClass uint32) (err error) = kernel32.SetPriorityClass
   266  //sys	GetPriorityClass(process Handle) (ret uint32, err error) = kernel32.GetPriorityClass
   267  //sys	SetInformationJobObject(job Handle, JobObjectInformationClass uint32, JobObjectInformation uintptr, JobObjectInformationLength uint32) (ret int, err error)
   268  //sys	GenerateConsoleCtrlEvent(ctrlEvent uint32, processGroupID uint32) (err error)
   269  
   270  // Volume Management Functions
   271  //sys	DefineDosDevice(flags uint32, deviceName *uint16, targetPath *uint16) (err error) = DefineDosDeviceW
   272  //sys	DeleteVolumeMountPoint(volumeMountPoint *uint16) (err error) = DeleteVolumeMountPointW
   273  //sys	FindFirstVolume(volumeName *uint16, bufferLength uint32) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstVolumeW
   274  //sys	FindFirstVolumeMountPoint(rootPathName *uint16, volumeMountPoint *uint16, bufferLength uint32) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstVolumeMountPointW
   275  //sys	FindNextVolume(findVolume Handle, volumeName *uint16, bufferLength uint32) (err error) = FindNextVolumeW
   276  //sys	FindNextVolumeMountPoint(findVolumeMountPoint Handle, volumeMountPoint *uint16, bufferLength uint32) (err error) = FindNextVolumeMountPointW
   277  //sys	FindVolumeClose(findVolume Handle) (err error)
   278  //sys	FindVolumeMountPointClose(findVolumeMountPoint Handle) (err error)
   279  //sys	GetDriveType(rootPathName *uint16) (driveType uint32) = GetDriveTypeW
   280  //sys	GetLogicalDrives() (drivesBitMask uint32, err error) [failretval==0]
   281  //sys	GetLogicalDriveStrings(bufferLength uint32, buffer *uint16) (n uint32, err error) [failretval==0] = GetLogicalDriveStringsW
   282  //sys	GetVolumeInformation(rootPathName *uint16, volumeNameBuffer *uint16, volumeNameSize uint32, volumeNameSerialNumber *uint32, maximumComponentLength *uint32, fileSystemFlags *uint32, fileSystemNameBuffer *uint16, fileSystemNameSize uint32) (err error) = GetVolumeInformationW
   283  //sys	GetVolumeInformationByHandle(file Handle, volumeNameBuffer *uint16, volumeNameSize uint32, volumeNameSerialNumber *uint32, maximumComponentLength *uint32, fileSystemFlags *uint32, fileSystemNameBuffer *uint16, fileSystemNameSize uint32) (err error) = GetVolumeInformationByHandleW
   284  //sys	GetVolumeNameForVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16, bufferlength uint32) (err error) = GetVolumeNameForVolumeMountPointW
   285  //sys	GetVolumePathName(fileName *uint16, volumePathName *uint16, bufferLength uint32) (err error) = GetVolumePathNameW
   286  //sys	GetVolumePathNamesForVolumeName(volumeName *uint16, volumePathNames *uint16, bufferLength uint32, returnLength *uint32) (err error) = GetVolumePathNamesForVolumeNameW
   287  //sys	QueryDosDevice(deviceName *uint16, targetPath *uint16, max uint32) (n uint32, err error) [failretval==0] = QueryDosDeviceW
   288  //sys	SetVolumeLabel(rootPathName *uint16, volumeName *uint16) (err error) = SetVolumeLabelW
   289  //sys	SetVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16) (err error) = SetVolumeMountPointW
   290  //sys	MessageBox(hwnd Handle, text *uint16, caption *uint16, boxtype uint32) (ret int32, err error) [failretval==0] = user32.MessageBoxW
   291  //sys	clsidFromString(lpsz *uint16, pclsid *GUID) (ret error) = ole32.CLSIDFromString
   292  //sys	stringFromGUID2(rguid *GUID, lpsz *uint16, cchMax int32) (chars int32) = ole32.StringFromGUID2
   293  //sys	coCreateGuid(pguid *GUID) (ret error) = ole32.CoCreateGuid
   294  
   295  // syscall interface implementation for other packages
   296  
   297  // GetProcAddressByOrdinal retrieves the address of the exported
   298  // function from module by ordinal.
   299  func GetProcAddressByOrdinal(module Handle, ordinal uintptr) (proc uintptr, err error) {
   300  	r0, _, e1 := syscall.Syscall(procGetProcAddress.Addr(), 2, uintptr(module), ordinal, 0)
   301  	proc = uintptr(r0)
   302  	if proc == 0 {
   303  		if e1 != 0 {
   304  			err = errnoErr(e1)
   305  		} else {
   306  			err = syscall.EINVAL
   307  		}
   308  	}
   309  	return
   310  }
   311  
   312  func Exit(code int) { ExitProcess(uint32(code)) }
   313  
   314  func makeInheritSa() *SecurityAttributes {
   315  	var sa SecurityAttributes
   316  	sa.Length = uint32(unsafe.Sizeof(sa))
   317  	sa.InheritHandle = 1
   318  	return &sa
   319  }
   320  
   321  func Open(path string, mode int, perm uint32) (fd Handle, err error) {
   322  	if len(path) == 0 {
   323  		return InvalidHandle, ERROR_FILE_NOT_FOUND
   324  	}
   325  	pathp, err := UTF16PtrFromString(path)
   326  	if err != nil {
   327  		return InvalidHandle, err
   328  	}
   329  	var access uint32
   330  	switch mode & (O_RDONLY | O_WRONLY | O_RDWR) {
   331  	case O_RDONLY:
   332  		access = GENERIC_READ
   333  	case O_WRONLY:
   334  		access = GENERIC_WRITE
   335  	case O_RDWR:
   336  		access = GENERIC_READ | GENERIC_WRITE
   337  	}
   338  	if mode&O_CREAT != 0 {
   339  		access |= GENERIC_WRITE
   340  	}
   341  	if mode&O_APPEND != 0 {
   342  		access &^= GENERIC_WRITE
   343  		access |= FILE_APPEND_DATA
   344  	}
   345  	sharemode := uint32(FILE_SHARE_READ | FILE_SHARE_WRITE)
   346  	var sa *SecurityAttributes
   347  	if mode&O_CLOEXEC == 0 {
   348  		sa = makeInheritSa()
   349  	}
   350  	var createmode uint32
   351  	switch {
   352  	case mode&(O_CREAT|O_EXCL) == (O_CREAT | O_EXCL):
   353  		createmode = CREATE_NEW
   354  	case mode&(O_CREAT|O_TRUNC) == (O_CREAT | O_TRUNC):
   355  		createmode = CREATE_ALWAYS
   356  	case mode&O_CREAT == O_CREAT:
   357  		createmode = OPEN_ALWAYS
   358  	case mode&O_TRUNC == O_TRUNC:
   359  		createmode = TRUNCATE_EXISTING
   360  	default:
   361  		createmode = OPEN_EXISTING
   362  	}
   363  	h, e := CreateFile(pathp, access, sharemode, sa, createmode, FILE_ATTRIBUTE_NORMAL, 0)
   364  	return h, e
   365  }
   366  
   367  func Read(fd Handle, p []byte) (n int, err error) {
   368  	var done uint32
   369  	e := ReadFile(fd, p, &done, nil)
   370  	if e != nil {
   371  		if e == ERROR_BROKEN_PIPE {
   372  			// NOTE(brainman): work around ERROR_BROKEN_PIPE is returned on reading EOF from stdin
   373  			return 0, nil
   374  		}
   375  		return 0, e
   376  	}
   377  	if raceenabled {
   378  		if done > 0 {
   379  			raceWriteRange(unsafe.Pointer(&p[0]), int(done))
   380  		}
   381  		raceAcquire(unsafe.Pointer(&ioSync))
   382  	}
   383  	return int(done), nil
   384  }
   385  
   386  func Write(fd Handle, p []byte) (n int, err error) {
   387  	if raceenabled {
   388  		raceReleaseMerge(unsafe.Pointer(&ioSync))
   389  	}
   390  	var done uint32
   391  	e := WriteFile(fd, p, &done, nil)
   392  	if e != nil {
   393  		return 0, e
   394  	}
   395  	if raceenabled && done > 0 {
   396  		raceReadRange(unsafe.Pointer(&p[0]), int(done))
   397  	}
   398  	return int(done), nil
   399  }
   400  
   401  var ioSync int64
   402  
   403  func Seek(fd Handle, offset int64, whence int) (newoffset int64, err error) {
   404  	var w uint32
   405  	switch whence {
   406  	case 0:
   407  		w = FILE_BEGIN
   408  	case 1:
   409  		w = FILE_CURRENT
   410  	case 2:
   411  		w = FILE_END
   412  	}
   413  	hi := int32(offset >> 32)
   414  	lo := int32(offset)
   415  	// use GetFileType to check pipe, pipe can't do seek
   416  	ft, _ := GetFileType(fd)
   417  	if ft == FILE_TYPE_PIPE {
   418  		return 0, syscall.EPIPE
   419  	}
   420  	rlo, e := SetFilePointer(fd, lo, &hi, w)
   421  	if e != nil {
   422  		return 0, e
   423  	}
   424  	return int64(hi)<<32 + int64(rlo), nil
   425  }
   426  
   427  func Close(fd Handle) (err error) {
   428  	return CloseHandle(fd)
   429  }
   430  
   431  var (
   432  	Stdin  = getStdHandle(STD_INPUT_HANDLE)
   433  	Stdout = getStdHandle(STD_OUTPUT_HANDLE)
   434  	Stderr = getStdHandle(STD_ERROR_HANDLE)
   435  )
   436  
   437  func getStdHandle(stdhandle uint32) (fd Handle) {
   438  	r, _ := GetStdHandle(stdhandle)
   439  	CloseOnExec(r)
   440  	return r
   441  }
   442  
   443  const ImplementsGetwd = true
   444  
   445  func Getwd() (wd string, err error) {
   446  	b := make([]uint16, 300)
   447  	n, e := GetCurrentDirectory(uint32(len(b)), &b[0])
   448  	if e != nil {
   449  		return "", e
   450  	}
   451  	return string(utf16.Decode(b[0:n])), nil
   452  }
   453  
   454  func Chdir(path string) (err error) {
   455  	pathp, err := UTF16PtrFromString(path)
   456  	if err != nil {
   457  		return err
   458  	}
   459  	return SetCurrentDirectory(pathp)
   460  }
   461  
   462  func Mkdir(path string, mode uint32) (err error) {
   463  	pathp, err := UTF16PtrFromString(path)
   464  	if err != nil {
   465  		return err
   466  	}
   467  	return CreateDirectory(pathp, nil)
   468  }
   469  
   470  func Rmdir(path string) (err error) {
   471  	pathp, err := UTF16PtrFromString(path)
   472  	if err != nil {
   473  		return err
   474  	}
   475  	return RemoveDirectory(pathp)
   476  }
   477  
   478  func Unlink(path string) (err error) {
   479  	pathp, err := UTF16PtrFromString(path)
   480  	if err != nil {
   481  		return err
   482  	}
   483  	return DeleteFile(pathp)
   484  }
   485  
   486  func Rename(oldpath, newpath string) (err error) {
   487  	from, err := UTF16PtrFromString(oldpath)
   488  	if err != nil {
   489  		return err
   490  	}
   491  	to, err := UTF16PtrFromString(newpath)
   492  	if err != nil {
   493  		return err
   494  	}
   495  	return MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING)
   496  }
   497  
   498  func ComputerName() (name string, err error) {
   499  	var n uint32 = MAX_COMPUTERNAME_LENGTH + 1
   500  	b := make([]uint16, n)
   501  	e := GetComputerName(&b[0], &n)
   502  	if e != nil {
   503  		return "", e
   504  	}
   505  	return string(utf16.Decode(b[0:n])), nil
   506  }
   507  
   508  func DurationSinceBoot() time.Duration {
   509  	return time.Duration(getTickCount64()) * time.Millisecond
   510  }
   511  
   512  func Ftruncate(fd Handle, length int64) (err error) {
   513  	curoffset, e := Seek(fd, 0, 1)
   514  	if e != nil {
   515  		return e
   516  	}
   517  	defer Seek(fd, curoffset, 0)
   518  	_, e = Seek(fd, length, 0)
   519  	if e != nil {
   520  		return e
   521  	}
   522  	e = SetEndOfFile(fd)
   523  	if e != nil {
   524  		return e
   525  	}
   526  	return nil
   527  }
   528  
   529  func Gettimeofday(tv *Timeval) (err error) {
   530  	var ft Filetime
   531  	GetSystemTimeAsFileTime(&ft)
   532  	*tv = NsecToTimeval(ft.Nanoseconds())
   533  	return nil
   534  }
   535  
   536  func Pipe(p []Handle) (err error) {
   537  	if len(p) != 2 {
   538  		return syscall.EINVAL
   539  	}
   540  	var r, w Handle
   541  	e := CreatePipe(&r, &w, makeInheritSa(), 0)
   542  	if e != nil {
   543  		return e
   544  	}
   545  	p[0] = r
   546  	p[1] = w
   547  	return nil
   548  }
   549  
   550  func Utimes(path string, tv []Timeval) (err error) {
   551  	if len(tv) != 2 {
   552  		return syscall.EINVAL
   553  	}
   554  	pathp, e := UTF16PtrFromString(path)
   555  	if e != nil {
   556  		return e
   557  	}
   558  	h, e := CreateFile(pathp,
   559  		FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil,
   560  		OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)
   561  	if e != nil {
   562  		return e
   563  	}
   564  	defer Close(h)
   565  	a := NsecToFiletime(tv[0].Nanoseconds())
   566  	w := NsecToFiletime(tv[1].Nanoseconds())
   567  	return SetFileTime(h, nil, &a, &w)
   568  }
   569  
   570  func UtimesNano(path string, ts []Timespec) (err error) {
   571  	if len(ts) != 2 {
   572  		return syscall.EINVAL
   573  	}
   574  	pathp, e := UTF16PtrFromString(path)
   575  	if e != nil {
   576  		return e
   577  	}
   578  	h, e := CreateFile(pathp,
   579  		FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil,
   580  		OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)
   581  	if e != nil {
   582  		return e
   583  	}
   584  	defer Close(h)
   585  	a := NsecToFiletime(TimespecToNsec(ts[0]))
   586  	w := NsecToFiletime(TimespecToNsec(ts[1]))
   587  	return SetFileTime(h, nil, &a, &w)
   588  }
   589  
   590  func Fsync(fd Handle) (err error) {
   591  	return FlushFileBuffers(fd)
   592  }
   593  
   594  func Chmod(path string, mode uint32) (err error) {
   595  	p, e := UTF16PtrFromString(path)
   596  	if e != nil {
   597  		return e
   598  	}
   599  	attrs, e := GetFileAttributes(p)
   600  	if e != nil {
   601  		return e
   602  	}
   603  	if mode&S_IWRITE != 0 {
   604  		attrs &^= FILE_ATTRIBUTE_READONLY
   605  	} else {
   606  		attrs |= FILE_ATTRIBUTE_READONLY
   607  	}
   608  	return SetFileAttributes(p, attrs)
   609  }
   610  
   611  func LoadGetSystemTimePreciseAsFileTime() error {
   612  	return procGetSystemTimePreciseAsFileTime.Find()
   613  }
   614  
   615  func LoadCancelIoEx() error {
   616  	return procCancelIoEx.Find()
   617  }
   618  
   619  func LoadSetFileCompletionNotificationModes() error {
   620  	return procSetFileCompletionNotificationModes.Find()
   621  }
   622  
   623  func WaitForMultipleObjects(handles []Handle, waitAll bool, waitMilliseconds uint32) (event uint32, err error) {
   624  	// Every other win32 array API takes arguments as "pointer, count", except for this function. So we
   625  	// can't declare it as a usual [] type, because mksyscall will use the opposite order. We therefore
   626  	// trivially stub this ourselves.
   627  
   628  	var handlePtr *Handle
   629  	if len(handles) > 0 {
   630  		handlePtr = &handles[0]
   631  	}
   632  	return waitForMultipleObjects(uint32(len(handles)), uintptr(unsafe.Pointer(handlePtr)), waitAll, waitMilliseconds)
   633  }
   634  
   635  // net api calls
   636  
   637  const socket_error = uintptr(^uint32(0))
   638  
   639  //sys	WSAStartup(verreq uint32, data *WSAData) (sockerr error) = ws2_32.WSAStartup
   640  //sys	WSACleanup() (err error) [failretval==socket_error] = ws2_32.WSACleanup
   641  //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
   642  //sys	socket(af int32, typ int32, protocol int32) (handle Handle, err error) [failretval==InvalidHandle] = ws2_32.socket
   643  //sys	Setsockopt(s Handle, level int32, optname int32, optval *byte, optlen int32) (err error) [failretval==socket_error] = ws2_32.setsockopt
   644  //sys	Getsockopt(s Handle, level int32, optname int32, optval *byte, optlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockopt
   645  //sys	bind(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.bind
   646  //sys	connect(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.connect
   647  //sys	getsockname(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockname
   648  //sys	getpeername(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getpeername
   649  //sys	listen(s Handle, backlog int32) (err error) [failretval==socket_error] = ws2_32.listen
   650  //sys	shutdown(s Handle, how int32) (err error) [failretval==socket_error] = ws2_32.shutdown
   651  //sys	Closesocket(s Handle) (err error) [failretval==socket_error] = ws2_32.closesocket
   652  //sys	AcceptEx(ls Handle, as Handle, buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, recvd *uint32, overlapped *Overlapped) (err error) = mswsock.AcceptEx
   653  //sys	GetAcceptExSockaddrs(buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, lrsa **RawSockaddrAny, lrsalen *int32, rrsa **RawSockaddrAny, rrsalen *int32) = mswsock.GetAcceptExSockaddrs
   654  //sys	WSARecv(s Handle, bufs *WSABuf, bufcnt uint32, recvd *uint32, flags *uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSARecv
   655  //sys	WSASend(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSASend
   656  //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
   657  //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
   658  //sys	GetHostByName(name string) (h *Hostent, err error) [failretval==nil] = ws2_32.gethostbyname
   659  //sys	GetServByName(name string, proto string) (s *Servent, err error) [failretval==nil] = ws2_32.getservbyname
   660  //sys	Ntohs(netshort uint16) (u uint16) = ws2_32.ntohs
   661  //sys	GetProtoByName(name string) (p *Protoent, err error) [failretval==nil] = ws2_32.getprotobyname
   662  //sys	DnsQuery(name string, qtype uint16, options uint32, extra *byte, qrs **DNSRecord, pr *byte) (status error) = dnsapi.DnsQuery_W
   663  //sys	DnsRecordListFree(rl *DNSRecord, freetype uint32) = dnsapi.DnsRecordListFree
   664  //sys	DnsNameCompare(name1 *uint16, name2 *uint16) (same bool) = dnsapi.DnsNameCompare_W
   665  //sys	GetAddrInfoW(nodename *uint16, servicename *uint16, hints *AddrinfoW, result **AddrinfoW) (sockerr error) = ws2_32.GetAddrInfoW
   666  //sys	FreeAddrInfoW(addrinfo *AddrinfoW) = ws2_32.FreeAddrInfoW
   667  //sys	GetIfEntry(pIfRow *MibIfRow) (errcode error) = iphlpapi.GetIfEntry
   668  //sys	GetAdaptersInfo(ai *IpAdapterInfo, ol *uint32) (errcode error) = iphlpapi.GetAdaptersInfo
   669  //sys	SetFileCompletionNotificationModes(handle Handle, flags uint8) (err error) = kernel32.SetFileCompletionNotificationModes
   670  //sys	WSAEnumProtocols(protocols *int32, protocolBuffer *WSAProtocolInfo, bufferLength *uint32) (n int32, err error) [failretval==-1] = ws2_32.WSAEnumProtocolsW
   671  //sys	GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses
   672  //sys	GetACP() (acp uint32) = kernel32.GetACP
   673  //sys	MultiByteToWideChar(codePage uint32, dwFlags uint32, str *byte, nstr int32, wchar *uint16, nwchar int32) (nwrite int32, err error) = kernel32.MultiByteToWideChar
   674  
   675  // For testing: clients can set this flag to force
   676  // creation of IPv6 sockets to return EAFNOSUPPORT.
   677  var SocketDisableIPv6 bool
   678  
   679  type RawSockaddrInet4 struct {
   680  	Family uint16
   681  	Port   uint16
   682  	Addr   [4]byte /* in_addr */
   683  	Zero   [8]uint8
   684  }
   685  
   686  type RawSockaddrInet6 struct {
   687  	Family   uint16
   688  	Port     uint16
   689  	Flowinfo uint32
   690  	Addr     [16]byte /* in6_addr */
   691  	Scope_id uint32
   692  }
   693  
   694  type RawSockaddr struct {
   695  	Family uint16
   696  	Data   [14]int8
   697  }
   698  
   699  type RawSockaddrAny struct {
   700  	Addr RawSockaddr
   701  	Pad  [100]int8
   702  }
   703  
   704  type Sockaddr interface {
   705  	sockaddr() (ptr unsafe.Pointer, len int32, err error) // lowercase; only we can define Sockaddrs
   706  }
   707  
   708  type SockaddrInet4 struct {
   709  	Port int
   710  	Addr [4]byte
   711  	raw  RawSockaddrInet4
   712  }
   713  
   714  func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, int32, error) {
   715  	if sa.Port < 0 || sa.Port > 0xFFFF {
   716  		return nil, 0, syscall.EINVAL
   717  	}
   718  	sa.raw.Family = AF_INET
   719  	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
   720  	p[0] = byte(sa.Port >> 8)
   721  	p[1] = byte(sa.Port)
   722  	for i := 0; i < len(sa.Addr); i++ {
   723  		sa.raw.Addr[i] = sa.Addr[i]
   724  	}
   725  	return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil
   726  }
   727  
   728  type SockaddrInet6 struct {
   729  	Port   int
   730  	ZoneId uint32
   731  	Addr   [16]byte
   732  	raw    RawSockaddrInet6
   733  }
   734  
   735  func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, int32, error) {
   736  	if sa.Port < 0 || sa.Port > 0xFFFF {
   737  		return nil, 0, syscall.EINVAL
   738  	}
   739  	sa.raw.Family = AF_INET6
   740  	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
   741  	p[0] = byte(sa.Port >> 8)
   742  	p[1] = byte(sa.Port)
   743  	sa.raw.Scope_id = sa.ZoneId
   744  	for i := 0; i < len(sa.Addr); i++ {
   745  		sa.raw.Addr[i] = sa.Addr[i]
   746  	}
   747  	return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil
   748  }
   749  
   750  type RawSockaddrUnix struct {
   751  	Family uint16
   752  	Path   [UNIX_PATH_MAX]int8
   753  }
   754  
   755  type SockaddrUnix struct {
   756  	Name string
   757  	raw  RawSockaddrUnix
   758  }
   759  
   760  func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, int32, error) {
   761  	name := sa.Name
   762  	n := len(name)
   763  	if n > len(sa.raw.Path) {
   764  		return nil, 0, syscall.EINVAL
   765  	}
   766  	if n == len(sa.raw.Path) && name[0] != '@' {
   767  		return nil, 0, syscall.EINVAL
   768  	}
   769  	sa.raw.Family = AF_UNIX
   770  	for i := 0; i < n; i++ {
   771  		sa.raw.Path[i] = int8(name[i])
   772  	}
   773  	// length is family (uint16), name, NUL.
   774  	sl := int32(2)
   775  	if n > 0 {
   776  		sl += int32(n) + 1
   777  	}
   778  	if sa.raw.Path[0] == '@' {
   779  		sa.raw.Path[0] = 0
   780  		// Don't count trailing NUL for abstract address.
   781  		sl--
   782  	}
   783  
   784  	return unsafe.Pointer(&sa.raw), sl, nil
   785  }
   786  
   787  func (rsa *RawSockaddrAny) Sockaddr() (Sockaddr, error) {
   788  	switch rsa.Addr.Family {
   789  	case AF_UNIX:
   790  		pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
   791  		sa := new(SockaddrUnix)
   792  		if pp.Path[0] == 0 {
   793  			// "Abstract" Unix domain socket.
   794  			// Rewrite leading NUL as @ for textual display.
   795  			// (This is the standard convention.)
   796  			// Not friendly to overwrite in place,
   797  			// but the callers below don't care.
   798  			pp.Path[0] = '@'
   799  		}
   800  
   801  		// Assume path ends at NUL.
   802  		// This is not technically the Linux semantics for
   803  		// abstract Unix domain sockets--they are supposed
   804  		// to be uninterpreted fixed-size binary blobs--but
   805  		// everyone uses this convention.
   806  		n := 0
   807  		for n < len(pp.Path) && pp.Path[n] != 0 {
   808  			n++
   809  		}
   810  		bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
   811  		sa.Name = string(bytes)
   812  		return sa, nil
   813  
   814  	case AF_INET:
   815  		pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
   816  		sa := new(SockaddrInet4)
   817  		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
   818  		sa.Port = int(p[0])<<8 + int(p[1])
   819  		for i := 0; i < len(sa.Addr); i++ {
   820  			sa.Addr[i] = pp.Addr[i]
   821  		}
   822  		return sa, nil
   823  
   824  	case AF_INET6:
   825  		pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
   826  		sa := new(SockaddrInet6)
   827  		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
   828  		sa.Port = int(p[0])<<8 + int(p[1])
   829  		sa.ZoneId = pp.Scope_id
   830  		for i := 0; i < len(sa.Addr); i++ {
   831  			sa.Addr[i] = pp.Addr[i]
   832  		}
   833  		return sa, nil
   834  	}
   835  	return nil, syscall.EAFNOSUPPORT
   836  }
   837  
   838  func Socket(domain, typ, proto int) (fd Handle, err error) {
   839  	if domain == AF_INET6 && SocketDisableIPv6 {
   840  		return InvalidHandle, syscall.EAFNOSUPPORT
   841  	}
   842  	return socket(int32(domain), int32(typ), int32(proto))
   843  }
   844  
   845  func SetsockoptInt(fd Handle, level, opt int, value int) (err error) {
   846  	v := int32(value)
   847  	return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&v)), int32(unsafe.Sizeof(v)))
   848  }
   849  
   850  func Bind(fd Handle, sa Sockaddr) (err error) {
   851  	ptr, n, err := sa.sockaddr()
   852  	if err != nil {
   853  		return err
   854  	}
   855  	return bind(fd, ptr, n)
   856  }
   857  
   858  func Connect(fd Handle, sa Sockaddr) (err error) {
   859  	ptr, n, err := sa.sockaddr()
   860  	if err != nil {
   861  		return err
   862  	}
   863  	return connect(fd, ptr, n)
   864  }
   865  
   866  func Getsockname(fd Handle) (sa Sockaddr, err error) {
   867  	var rsa RawSockaddrAny
   868  	l := int32(unsafe.Sizeof(rsa))
   869  	if err = getsockname(fd, &rsa, &l); err != nil {
   870  		return
   871  	}
   872  	return rsa.Sockaddr()
   873  }
   874  
   875  func Getpeername(fd Handle) (sa Sockaddr, err error) {
   876  	var rsa RawSockaddrAny
   877  	l := int32(unsafe.Sizeof(rsa))
   878  	if err = getpeername(fd, &rsa, &l); err != nil {
   879  		return
   880  	}
   881  	return rsa.Sockaddr()
   882  }
   883  
   884  func Listen(s Handle, n int) (err error) {
   885  	return listen(s, int32(n))
   886  }
   887  
   888  func Shutdown(fd Handle, how int) (err error) {
   889  	return shutdown(fd, int32(how))
   890  }
   891  
   892  func WSASendto(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to Sockaddr, overlapped *Overlapped, croutine *byte) (err error) {
   893  	rsa, l, err := to.sockaddr()
   894  	if err != nil {
   895  		return err
   896  	}
   897  	return WSASendTo(s, bufs, bufcnt, sent, flags, (*RawSockaddrAny)(unsafe.Pointer(rsa)), l, overlapped, croutine)
   898  }
   899  
   900  func LoadGetAddrInfo() error {
   901  	return procGetAddrInfoW.Find()
   902  }
   903  
   904  var connectExFunc struct {
   905  	once sync.Once
   906  	addr uintptr
   907  	err  error
   908  }
   909  
   910  func LoadConnectEx() error {
   911  	connectExFunc.once.Do(func() {
   912  		var s Handle
   913  		s, connectExFunc.err = Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)
   914  		if connectExFunc.err != nil {
   915  			return
   916  		}
   917  		defer CloseHandle(s)
   918  		var n uint32
   919  		connectExFunc.err = WSAIoctl(s,
   920  			SIO_GET_EXTENSION_FUNCTION_POINTER,
   921  			(*byte)(unsafe.Pointer(&WSAID_CONNECTEX)),
   922  			uint32(unsafe.Sizeof(WSAID_CONNECTEX)),
   923  			(*byte)(unsafe.Pointer(&connectExFunc.addr)),
   924  			uint32(unsafe.Sizeof(connectExFunc.addr)),
   925  			&n, nil, 0)
   926  	})
   927  	return connectExFunc.err
   928  }
   929  
   930  func connectEx(s Handle, name unsafe.Pointer, namelen int32, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) (err error) {
   931  	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)
   932  	if r1 == 0 {
   933  		if e1 != 0 {
   934  			err = error(e1)
   935  		} else {
   936  			err = syscall.EINVAL
   937  		}
   938  	}
   939  	return
   940  }
   941  
   942  func ConnectEx(fd Handle, sa Sockaddr, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) error {
   943  	err := LoadConnectEx()
   944  	if err != nil {
   945  		return errorspkg.New("failed to find ConnectEx: " + err.Error())
   946  	}
   947  	ptr, n, err := sa.sockaddr()
   948  	if err != nil {
   949  		return err
   950  	}
   951  	return connectEx(fd, ptr, n, sendBuf, sendDataLen, bytesSent, overlapped)
   952  }
   953  
   954  var sendRecvMsgFunc struct {
   955  	once     sync.Once
   956  	sendAddr uintptr
   957  	recvAddr uintptr
   958  	err      error
   959  }
   960  
   961  func loadWSASendRecvMsg() error {
   962  	sendRecvMsgFunc.once.Do(func() {
   963  		var s Handle
   964  		s, sendRecvMsgFunc.err = Socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)
   965  		if sendRecvMsgFunc.err != nil {
   966  			return
   967  		}
   968  		defer CloseHandle(s)
   969  		var n uint32
   970  		sendRecvMsgFunc.err = WSAIoctl(s,
   971  			SIO_GET_EXTENSION_FUNCTION_POINTER,
   972  			(*byte)(unsafe.Pointer(&WSAID_WSARECVMSG)),
   973  			uint32(unsafe.Sizeof(WSAID_WSARECVMSG)),
   974  			(*byte)(unsafe.Pointer(&sendRecvMsgFunc.recvAddr)),
   975  			uint32(unsafe.Sizeof(sendRecvMsgFunc.recvAddr)),
   976  			&n, nil, 0)
   977  		if sendRecvMsgFunc.err != nil {
   978  			return
   979  		}
   980  		sendRecvMsgFunc.err = WSAIoctl(s,
   981  			SIO_GET_EXTENSION_FUNCTION_POINTER,
   982  			(*byte)(unsafe.Pointer(&WSAID_WSASENDMSG)),
   983  			uint32(unsafe.Sizeof(WSAID_WSASENDMSG)),
   984  			(*byte)(unsafe.Pointer(&sendRecvMsgFunc.sendAddr)),
   985  			uint32(unsafe.Sizeof(sendRecvMsgFunc.sendAddr)),
   986  			&n, nil, 0)
   987  	})
   988  	return sendRecvMsgFunc.err
   989  }
   990  
   991  func WSASendMsg(fd Handle, msg *WSAMsg, flags uint32, bytesSent *uint32, overlapped *Overlapped, croutine *byte) error {
   992  	err := loadWSASendRecvMsg()
   993  	if err != nil {
   994  		return err
   995  	}
   996  	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)))
   997  	if r1 == socket_error {
   998  		if e1 != 0 {
   999  			err = errnoErr(e1)
  1000  		} else {
  1001  			err = syscall.EINVAL
  1002  		}
  1003  	}
  1004  	return err
  1005  }
  1006  
  1007  func WSARecvMsg(fd Handle, msg *WSAMsg, bytesReceived *uint32, overlapped *Overlapped, croutine *byte) error {
  1008  	err := loadWSASendRecvMsg()
  1009  	if err != nil {
  1010  		return err
  1011  	}
  1012  	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)
  1013  	if r1 == socket_error {
  1014  		if e1 != 0 {
  1015  			err = errnoErr(e1)
  1016  		} else {
  1017  			err = syscall.EINVAL
  1018  		}
  1019  	}
  1020  	return err
  1021  }
  1022  
  1023  // Invented structures to support what package os expects.
  1024  type Rusage struct {
  1025  	CreationTime Filetime
  1026  	ExitTime     Filetime
  1027  	KernelTime   Filetime
  1028  	UserTime     Filetime
  1029  }
  1030  
  1031  type WaitStatus struct {
  1032  	ExitCode uint32
  1033  }
  1034  
  1035  func (w WaitStatus) Exited() bool { return true }
  1036  
  1037  func (w WaitStatus) ExitStatus() int { return int(w.ExitCode) }
  1038  
  1039  func (w WaitStatus) Signal() Signal { return -1 }
  1040  
  1041  func (w WaitStatus) CoreDump() bool { return false }
  1042  
  1043  func (w WaitStatus) Stopped() bool { return false }
  1044  
  1045  func (w WaitStatus) Continued() bool { return false }
  1046  
  1047  func (w WaitStatus) StopSignal() Signal { return -1 }
  1048  
  1049  func (w WaitStatus) Signaled() bool { return false }
  1050  
  1051  func (w WaitStatus) TrapCause() int { return -1 }
  1052  
  1053  // Timespec is an invented structure on Windows, but here for
  1054  // consistency with the corresponding package for other operating systems.
  1055  type Timespec struct {
  1056  	Sec  int64
  1057  	Nsec int64
  1058  }
  1059  
  1060  func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
  1061  
  1062  func NsecToTimespec(nsec int64) (ts Timespec) {
  1063  	ts.Sec = nsec / 1e9
  1064  	ts.Nsec = nsec % 1e9
  1065  	return
  1066  }
  1067  
  1068  // TODO(brainman): fix all needed for net
  1069  
  1070  func Accept(fd Handle) (nfd Handle, sa Sockaddr, err error) { return 0, nil, syscall.EWINDOWS }
  1071  func Recvfrom(fd Handle, p []byte, flags int) (n int, from Sockaddr, err error) {
  1072  	return 0, nil, syscall.EWINDOWS
  1073  }
  1074  func Sendto(fd Handle, p []byte, flags int, to Sockaddr) (err error)       { return syscall.EWINDOWS }
  1075  func SetsockoptTimeval(fd Handle, level, opt int, tv *Timeval) (err error) { return syscall.EWINDOWS }
  1076  
  1077  // The Linger struct is wrong but we only noticed after Go 1.
  1078  // sysLinger is the real system call structure.
  1079  
  1080  // BUG(brainman): The definition of Linger is not appropriate for direct use
  1081  // with Setsockopt and Getsockopt.
  1082  // Use SetsockoptLinger instead.
  1083  
  1084  type Linger struct {
  1085  	Onoff  int32
  1086  	Linger int32
  1087  }
  1088  
  1089  type sysLinger struct {
  1090  	Onoff  uint16
  1091  	Linger uint16
  1092  }
  1093  
  1094  type IPMreq struct {
  1095  	Multiaddr [4]byte /* in_addr */
  1096  	Interface [4]byte /* in_addr */
  1097  }
  1098  
  1099  type IPv6Mreq struct {
  1100  	Multiaddr [16]byte /* in6_addr */
  1101  	Interface uint32
  1102  }
  1103  
  1104  func GetsockoptInt(fd Handle, level, opt int) (int, error) { return -1, syscall.EWINDOWS }
  1105  
  1106  func SetsockoptLinger(fd Handle, level, opt int, l *Linger) (err error) {
  1107  	sys := sysLinger{Onoff: uint16(l.Onoff), Linger: uint16(l.Linger)}
  1108  	return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&sys)), int32(unsafe.Sizeof(sys)))
  1109  }
  1110  
  1111  func SetsockoptInet4Addr(fd Handle, level, opt int, value [4]byte) (err error) {
  1112  	return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&value[0])), 4)
  1113  }
  1114  func SetsockoptIPMreq(fd Handle, level, opt int, mreq *IPMreq) (err error) {
  1115  	return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(mreq)), int32(unsafe.Sizeof(*mreq)))
  1116  }
  1117  func SetsockoptIPv6Mreq(fd Handle, level, opt int, mreq *IPv6Mreq) (err error) {
  1118  	return syscall.EWINDOWS
  1119  }
  1120  
  1121  func Getpid() (pid int) { return int(GetCurrentProcessId()) }
  1122  
  1123  func FindFirstFile(name *uint16, data *Win32finddata) (handle Handle, err error) {
  1124  	// NOTE(rsc): The Win32finddata struct is wrong for the system call:
  1125  	// the two paths are each one uint16 short. Use the correct struct,
  1126  	// a win32finddata1, and then copy the results out.
  1127  	// There is no loss of expressivity here, because the final
  1128  	// uint16, if it is used, is supposed to be a NUL, and Go doesn't need that.
  1129  	// For Go 1.1, we might avoid the allocation of win32finddata1 here
  1130  	// by adding a final Bug [2]uint16 field to the struct and then
  1131  	// adjusting the fields in the result directly.
  1132  	var data1 win32finddata1
  1133  	handle, err = findFirstFile1(name, &data1)
  1134  	if err == nil {
  1135  		copyFindData(data, &data1)
  1136  	}
  1137  	return
  1138  }
  1139  
  1140  func FindNextFile(handle Handle, data *Win32finddata) (err error) {
  1141  	var data1 win32finddata1
  1142  	err = findNextFile1(handle, &data1)
  1143  	if err == nil {
  1144  		copyFindData(data, &data1)
  1145  	}
  1146  	return
  1147  }
  1148  
  1149  func getProcessEntry(pid int) (*ProcessEntry32, error) {
  1150  	snapshot, err := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
  1151  	if err != nil {
  1152  		return nil, err
  1153  	}
  1154  	defer CloseHandle(snapshot)
  1155  	var procEntry ProcessEntry32
  1156  	procEntry.Size = uint32(unsafe.Sizeof(procEntry))
  1157  	if err = Process32First(snapshot, &procEntry); err != nil {
  1158  		return nil, err
  1159  	}
  1160  	for {
  1161  		if procEntry.ProcessID == uint32(pid) {
  1162  			return &procEntry, nil
  1163  		}
  1164  		err = Process32Next(snapshot, &procEntry)
  1165  		if err != nil {
  1166  			return nil, err
  1167  		}
  1168  	}
  1169  }
  1170  
  1171  func Getppid() (ppid int) {
  1172  	pe, err := getProcessEntry(Getpid())
  1173  	if err != nil {
  1174  		return -1
  1175  	}
  1176  	return int(pe.ParentProcessID)
  1177  }
  1178  
  1179  // TODO(brainman): fix all needed for os
  1180  func Fchdir(fd Handle) (err error)             { return syscall.EWINDOWS }
  1181  func Link(oldpath, newpath string) (err error) { return syscall.EWINDOWS }
  1182  func Symlink(path, link string) (err error)    { return syscall.EWINDOWS }
  1183  
  1184  func Fchmod(fd Handle, mode uint32) (err error)        { return syscall.EWINDOWS }
  1185  func Chown(path string, uid int, gid int) (err error)  { return syscall.EWINDOWS }
  1186  func Lchown(path string, uid int, gid int) (err error) { return syscall.EWINDOWS }
  1187  func Fchown(fd Handle, uid int, gid int) (err error)   { return syscall.EWINDOWS }
  1188  
  1189  func Getuid() (uid int)                  { return -1 }
  1190  func Geteuid() (euid int)                { return -1 }
  1191  func Getgid() (gid int)                  { return -1 }
  1192  func Getegid() (egid int)                { return -1 }
  1193  func Getgroups() (gids []int, err error) { return nil, syscall.EWINDOWS }
  1194  
  1195  type Signal int
  1196  
  1197  func (s Signal) Signal() {}
  1198  
  1199  func (s Signal) String() string {
  1200  	if 0 <= s && int(s) < len(signals) {
  1201  		str := signals[s]
  1202  		if str != "" {
  1203  			return str
  1204  		}
  1205  	}
  1206  	return "signal " + itoa(int(s))
  1207  }
  1208  
  1209  func LoadCreateSymbolicLink() error {
  1210  	return procCreateSymbolicLinkW.Find()
  1211  }
  1212  
  1213  // Readlink returns the destination of the named symbolic link.
  1214  func Readlink(path string, buf []byte) (n int, err error) {
  1215  	fd, err := CreateFile(StringToUTF16Ptr(path), GENERIC_READ, 0, nil, OPEN_EXISTING,
  1216  		FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, 0)
  1217  	if err != nil {
  1218  		return -1, err
  1219  	}
  1220  	defer CloseHandle(fd)
  1221  
  1222  	rdbbuf := make([]byte, MAXIMUM_REPARSE_DATA_BUFFER_SIZE)
  1223  	var bytesReturned uint32
  1224  	err = DeviceIoControl(fd, FSCTL_GET_REPARSE_POINT, nil, 0, &rdbbuf[0], uint32(len(rdbbuf)), &bytesReturned, nil)
  1225  	if err != nil {
  1226  		return -1, err
  1227  	}
  1228  
  1229  	rdb := (*reparseDataBuffer)(unsafe.Pointer(&rdbbuf[0]))
  1230  	var s string
  1231  	switch rdb.ReparseTag {
  1232  	case IO_REPARSE_TAG_SYMLINK:
  1233  		data := (*symbolicLinkReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
  1234  		p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
  1235  		s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2])
  1236  	case IO_REPARSE_TAG_MOUNT_POINT:
  1237  		data := (*mountPointReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
  1238  		p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
  1239  		s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2])
  1240  	default:
  1241  		// the path is not a symlink or junction but another type of reparse
  1242  		// point
  1243  		return -1, syscall.ENOENT
  1244  	}
  1245  	n = copy(buf, []byte(s))
  1246  
  1247  	return n, nil
  1248  }
  1249  
  1250  // GUIDFromString parses a string in the form of
  1251  // "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}" into a GUID.
  1252  func GUIDFromString(str string) (GUID, error) {
  1253  	guid := GUID{}
  1254  	str16, err := syscall.UTF16PtrFromString(str)
  1255  	if err != nil {
  1256  		return guid, err
  1257  	}
  1258  	err = clsidFromString(str16, &guid)
  1259  	if err != nil {
  1260  		return guid, err
  1261  	}
  1262  	return guid, nil
  1263  }
  1264  
  1265  // GenerateGUID creates a new random GUID.
  1266  func GenerateGUID() (GUID, error) {
  1267  	guid := GUID{}
  1268  	err := coCreateGuid(&guid)
  1269  	if err != nil {
  1270  		return guid, err
  1271  	}
  1272  	return guid, nil
  1273  }
  1274  
  1275  // String returns the canonical string form of the GUID,
  1276  // in the form of "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}".
  1277  func (guid GUID) String() string {
  1278  	var str [100]uint16
  1279  	chars := stringFromGUID2(&guid, &str[0], int32(len(str)))
  1280  	if chars <= 1 {
  1281  		return ""
  1282  	}
  1283  	return string(utf16.Decode(str[:chars-1]))
  1284  }