| // 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 syscall |
| |
| import ( |
| errorspkg "errors" |
| "internal/asan" |
| "internal/bytealg" |
| "internal/itoa" |
| "internal/msan" |
| "internal/oserror" |
| "internal/race" |
| "runtime" |
| "sync" |
| "unsafe" |
| ) |
| |
| type Handle uintptr |
| |
| const InvalidHandle = ^Handle(0) |
| |
| // StringToUTF16 returns the UTF-16 encoding of the UTF-8 string s, |
| // with a terminating NUL added. If s contains a NUL byte this |
| // function panics instead of returning an error. |
| // |
| // Deprecated: Use [UTF16FromString] instead. |
| func StringToUTF16(s string) []uint16 { |
| a, err := UTF16FromString(s) |
| if err != nil { |
| panic("syscall: 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, [EINVAL]). Unpaired surrogates |
| // are encoded using WTF-8. |
| func UTF16FromString(s string) ([]uint16, error) { |
| if bytealg.IndexByteString(s, 0) != -1 { |
| return nil, EINVAL |
| } |
| // Valid UTF-8 characters between 1 and 3 bytes require one uint16. |
| // Valid UTF-8 characters of 4 bytes require two uint16. |
| // Bytes with invalid UTF-8 encoding require maximum one uint16 per byte. |
| // So the number of UTF-8 code units (len(s)) is always greater or |
| // equal than the number of UTF-16 code units. |
| // Also account for the terminating NUL character. |
| buf := make([]uint16, 0, len(s)+1) |
| buf = encodeWTF16(s, buf) |
| return append(buf, 0), nil |
| } |
| |
| // UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s, |
| // with a terminating NUL removed. Unpaired surrogates are decoded |
| // using WTF-8 instead of UTF-8 encoding. |
| func UTF16ToString(s []uint16) string { |
| maxLen := 0 |
| for i, v := range s { |
| if v == 0 { |
| s = s[0:i] |
| break |
| } |
| switch { |
| case v <= rune1Max: |
| maxLen += 1 |
| case v <= rune2Max: |
| maxLen += 2 |
| default: |
| // r is a non-surrogate that decodes to 3 bytes, |
| // or is an unpaired surrogate (also 3 bytes in WTF-8), |
| // or is one half of a valid surrogate pair. |
| // If it is half of a pair, we will add 3 for the second surrogate |
| // (total of 6) and overestimate by 2 bytes for the pair, |
| // since the resulting rune only requires 4 bytes. |
| maxLen += 3 |
| } |
| } |
| buf := decodeWTF16(s, make([]byte, 0, maxLen)) |
| return unsafe.String(unsafe.SliceData(buf), len(buf)) |
| } |
| |
| // utf16PtrToString is like UTF16ToString, but takes *uint16 |
| // as a parameter instead of []uint16. |
| func utf16PtrToString(p *uint16) string { |
| if p == nil { |
| return "" |
| } |
| end := unsafe.Pointer(p) |
| n := 0 |
| for *(*uint16)(end) != 0 { |
| end = unsafe.Pointer(uintptr(end) + unsafe.Sizeof(*p)) |
| n++ |
| } |
| return UTF16ToString(unsafe.Slice(p, n)) |
| } |
| |
| // StringToUTF16Ptr returns pointer to the UTF-16 encoding of |
| // the UTF-8 string s, with a terminating NUL added. If s |
| // contains a NUL byte this function panics instead of |
| // returning an error. |
| // |
| // Deprecated: Use [UTF16PtrFromString] instead. |
| 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, EINVAL). |
| // Unpaired surrogates are encoded using WTF-8. |
| func UTF16PtrFromString(s string) (*uint16, error) { |
| a, err := UTF16FromString(s) |
| if err != nil { |
| return nil, err |
| } |
| return &a[0], nil |
| } |
| |
| // Errno is the Windows error number. |
| // |
| // Errno values can be tested against error values using [errors.Is]. |
| // For example: |
| // |
| // _, _, err := syscall.Syscall(...) |
| // if errors.Is(err, fs.ErrNotExist) ... |
| type Errno uintptr |
| |
| func langid(pri, sub uint16) uint32 { return uint32(sub)<<10 | uint32(pri) } |
| |
| // FormatMessage is deprecated (msgsrc should be uintptr, not uint32, but can |
| // not be changed due to the Go 1 compatibility guarantee). |
| // |
| // Deprecated: Use FormatMessage from golang.org/x/sys/windows instead. |
| func FormatMessage(flags uint32, msgsrc uint32, msgid uint32, langid uint32, buf []uint16, args *byte) (n uint32, err error) { |
| return formatMessage(flags, uintptr(msgsrc), msgid, langid, buf, args) |
| } |
| |
| func (e Errno) Error() string { |
| // deal with special go errors |
| idx := int(e - APPLICATION_ERROR) |
| if 0 <= idx && idx < len(errors) { |
| return errors[idx] |
| } |
| // ask windows for the remaining errors |
| var flags uint32 = FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ARGUMENT_ARRAY | FORMAT_MESSAGE_IGNORE_INSERTS |
| b := make([]uint16, 300) |
| n, err := formatMessage(flags, 0, uint32(e), langid(LANG_ENGLISH, SUBLANG_ENGLISH_US), b, nil) |
| if err != nil { |
| n, err = formatMessage(flags, 0, uint32(e), 0, b, nil) |
| if err != nil { |
| return "winapi error #" + itoa.Itoa(int(e)) |
| } |
| } |
| // trim terminating \r and \n |
| for ; n > 0 && (b[n-1] == '\n' || b[n-1] == '\r'); n-- { |
| } |
| return UTF16ToString(b[:n]) |
| } |
| |
| const ( |
| _ERROR_NOT_ENOUGH_MEMORY = Errno(8) |
| _ERROR_NOT_SUPPORTED = Errno(50) |
| _ERROR_BAD_NETPATH = Errno(53) |
| _ERROR_CALL_NOT_IMPLEMENTED = Errno(120) |
| ) |
| |
| func (e Errno) Is(target error) bool { |
| switch target { |
| case oserror.ErrPermission: |
| return e == ERROR_ACCESS_DENIED || |
| e == EACCES || |
| e == EPERM |
| case oserror.ErrExist: |
| return e == ERROR_ALREADY_EXISTS || |
| e == ERROR_DIR_NOT_EMPTY || |
| e == ERROR_FILE_EXISTS || |
| e == EEXIST || |
| e == ENOTEMPTY |
| case oserror.ErrNotExist: |
| return e == ERROR_FILE_NOT_FOUND || |
| e == _ERROR_BAD_NETPATH || |
| e == ERROR_PATH_NOT_FOUND || |
| e == ENOENT |
| case errorspkg.ErrUnsupported: |
| return e == _ERROR_NOT_SUPPORTED || |
| e == _ERROR_CALL_NOT_IMPLEMENTED || |
| e == ENOSYS || |
| e == ENOTSUP || |
| e == EOPNOTSUPP || |
| e == EWINDOWS |
| } |
| return false |
| } |
| |
| func (e Errno) Temporary() bool { |
| return e == EINTR || e == EMFILE || e.Timeout() |
| } |
| |
| func (e Errno) Timeout() bool { |
| return e == EAGAIN || e == EWOULDBLOCK || e == ETIMEDOUT |
| } |
| |
| // Implemented in runtime/syscall_windows.go. |
| func compileCallback(fn any, cleanstack bool) uintptr |
| |
| // 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. |
| // The argument is expected to be a function with one uintptr-sized result. The function must not have arguments with size larger than the size of uintptr. |
| // Only a limited number of callbacks may be created in a single Go process, and any memory allocated |
| // for these callbacks is never released. |
| // Between NewCallback and NewCallbackCDecl, at least 1024 callbacks can always be created. |
| func NewCallback(fn any) uintptr { |
| return compileCallback(fn, true) |
| } |
| |
| // 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. |
| // The argument is expected to be a function with one uintptr-sized result. The function must not have arguments with size larger than the size of uintptr. |
| // Only a limited number of callbacks may be created in a single Go process, and any memory allocated |
| // for these callbacks is never released. |
| // Between NewCallback and NewCallbackCDecl, at least 1024 callbacks can always be created. |
| func NewCallbackCDecl(fn any) uintptr { |
| return compileCallback(fn, false) |
| } |
| |
| // windows api calls |
| |
| //sys GetLastError() (lasterr error) |
| //sys LoadLibrary(libname string) (handle Handle, err error) = LoadLibraryW |
| //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) = ReadFile |
| //sys writeFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error) = WriteFile |
| //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 int) (handle Handle, err error) [failretval==InvalidHandle] |
| //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 GetComputerName(buf *uint16, n *uint32) (err error) = GetComputerNameW |
| //sys SetEndOfFile(handle Handle) (err error) |
| //sys GetSystemTimeAsFileTime(time *Filetime) |
| //sys GetTimeZoneInformation(tzi *Timezoneinformation) (rc uint32, err error) [failretval==0xffffffff] |
| //sys createIoCompletionPort(filehandle Handle, cphandle Handle, key uintptr, threadcnt uint32) (handle Handle, err error) = CreateIoCompletionPort |
| //sys getQueuedCompletionStatus(cphandle Handle, qty *uint32, key *uintptr, overlapped **Overlapped, timeout uint32) (err error) = GetQueuedCompletionStatus |
| //sys postQueuedCompletionStatus(cphandle Handle, qty uint32, key uintptr, overlapped *Overlapped) (err error) = PostQueuedCompletionStatus |
| //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 CreateProcessAsUser(token Token, appName *uint16, commandLine *uint16, procSecurity *SecurityAttributes, threadSecurity *SecurityAttributes, inheritHandles bool, creationFlags uint32, env *uint16, currentDir *uint16, startupInfo *StartupInfo, outProcInfo *ProcessInformation) (err error) = advapi32.CreateProcessAsUserW |
| //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) = 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 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) = 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 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 initializeProcThreadAttributeList(attrlist *_PROC_THREAD_ATTRIBUTE_LIST, attrcount uint32, flags uint32, size *uintptr) (err error) = InitializeProcThreadAttributeList |
| //sys deleteProcThreadAttributeList(attrlist *_PROC_THREAD_ATTRIBUTE_LIST) = DeleteProcThreadAttributeList |
| //sys updateProcThreadAttribute(attrlist *_PROC_THREAD_ATTRIBUTE_LIST, flags uint32, attr uintptr, value unsafe.Pointer, size uintptr, prevvalue unsafe.Pointer, returnedsize *uintptr) (err error) = UpdateProcThreadAttribute |
| //sys getFinalPathNameByHandle(file Handle, filePath *uint16, filePathSize uint32, flags uint32) (n uint32, err error) [n == 0 || n >= filePathSize] = kernel32.GetFinalPathNameByHandleW |
| |
| // syscall interface implementation for other packages |
| |
| 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 |
| } |
| var attrs uint32 = FILE_ATTRIBUTE_NORMAL |
| if perm&S_IWRITE == 0 { |
| attrs = FILE_ATTRIBUTE_READONLY |
| if createmode == CREATE_ALWAYS { |
| // We have been asked to create a read-only file. |
| // If the file already exists, the semantics of |
| // the Unix open system call is to preserve the |
| // existing permissions. If we pass CREATE_ALWAYS |
| // and FILE_ATTRIBUTE_READONLY to CreateFile, |
| // and the file already exists, CreateFile will |
| // change the file permissions. |
| // Avoid that to preserve the Unix semantics. |
| h, e := CreateFile(pathp, access, sharemode, sa, TRUNCATE_EXISTING, FILE_ATTRIBUTE_NORMAL, 0) |
| switch e { |
| case ERROR_FILE_NOT_FOUND, _ERROR_BAD_NETPATH, ERROR_PATH_NOT_FOUND: |
| // File does not exist. These are the same |
| // errors as Errno.Is checks for ErrNotExist. |
| // Carry on to create the file. |
| default: |
| // Success or some different error. |
| return h, e |
| } |
| } |
| } |
| if createmode == OPEN_EXISTING && access == GENERIC_READ { |
| // Necessary for opening directory handles. |
| attrs |= FILE_FLAG_BACKUP_SEMANTICS |
| } |
| if mode&O_SYNC != 0 { |
| const _FILE_FLAG_WRITE_THROUGH = 0x80000000 |
| attrs |= _FILE_FLAG_WRITE_THROUGH |
| } |
| return CreateFile(pathp, access, sharemode, sa, createmode, attrs, 0) |
| } |
| |
| 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 |
| } |
| return int(done), nil |
| } |
| |
| func Write(fd Handle, p []byte) (n int, err error) { |
| var done uint32 |
| e := WriteFile(fd, p, &done, nil) |
| if e != nil { |
| return 0, e |
| } |
| return int(done), nil |
| } |
| |
| func ReadFile(fd Handle, p []byte, done *uint32, overlapped *Overlapped) error { |
| err := readFile(fd, p, done, overlapped) |
| if race.Enabled { |
| if *done > 0 { |
| race.WriteRange(unsafe.Pointer(&p[0]), int(*done)) |
| } |
| race.Acquire(unsafe.Pointer(&ioSync)) |
| } |
| if msan.Enabled && *done > 0 { |
| msan.Write(unsafe.Pointer(&p[0]), uintptr(*done)) |
| } |
| if asan.Enabled && *done > 0 { |
| asan.Write(unsafe.Pointer(&p[0]), uintptr(*done)) |
| } |
| return err |
| } |
| |
| func WriteFile(fd Handle, p []byte, done *uint32, overlapped *Overlapped) error { |
| if race.Enabled { |
| race.ReleaseMerge(unsafe.Pointer(&ioSync)) |
| } |
| err := writeFile(fd, p, done, overlapped) |
| if race.Enabled && *done > 0 { |
| race.ReadRange(unsafe.Pointer(&p[0]), int(*done)) |
| } |
| if msan.Enabled && *done > 0 { |
| msan.Read(unsafe.Pointer(&p[0]), uintptr(*done)) |
| } |
| if asan.Enabled && *done > 0 { |
| asan.Read(unsafe.Pointer(&p[0]), uintptr(*done)) |
| } |
| return err |
| } |
| |
| var ioSync int64 |
| |
| var procSetFilePointerEx = modkernel32.NewProc("SetFilePointerEx") |
| |
| const ptrSize = unsafe.Sizeof(uintptr(0)) |
| |
| // setFilePointerEx calls SetFilePointerEx. |
| // See https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-setfilepointerex |
| func setFilePointerEx(handle Handle, distToMove int64, newFilePointer *int64, whence uint32) error { |
| var e1 Errno |
| if unsafe.Sizeof(uintptr(0)) == 8 { |
| _, _, e1 = Syscall6(procSetFilePointerEx.Addr(), 4, uintptr(handle), uintptr(distToMove), uintptr(unsafe.Pointer(newFilePointer)), uintptr(whence), 0, 0) |
| } else { |
| // Different 32-bit systems disgaree about whether distToMove starts 8-byte aligned. |
| switch runtime.GOARCH { |
| default: |
| panic("unsupported 32-bit architecture") |
| case "386": |
| // distToMove is a LARGE_INTEGER, which is 64 bits. |
| _, _, e1 = Syscall6(procSetFilePointerEx.Addr(), 5, uintptr(handle), uintptr(distToMove), uintptr(distToMove>>32), uintptr(unsafe.Pointer(newFilePointer)), uintptr(whence), 0) |
| case "arm": |
| // distToMove must be 8-byte aligned per ARM calling convention |
| // https://docs.microsoft.com/en-us/cpp/build/overview-of-arm-abi-conventions#stage-c-assignment-of-arguments-to-registers-and-stack |
| _, _, e1 = Syscall6(procSetFilePointerEx.Addr(), 6, uintptr(handle), 0, uintptr(distToMove), uintptr(distToMove>>32), uintptr(unsafe.Pointer(newFilePointer)), uintptr(whence)) |
| } |
| } |
| if e1 != 0 { |
| return errnoErr(e1) |
| } |
| return nil |
| } |
| |
| 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 |
| } |
| err = setFilePointerEx(fd, offset, &newoffset, w) |
| return |
| } |
| |
| 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(h int) (fd Handle) { |
| r, _ := GetStdHandle(h) |
| return r |
| } |
| |
| const ImplementsGetwd = true |
| |
| func Getwd() (wd string, err error) { |
| b := make([]uint16, 300) |
| // The path of the current directory may not fit in the initial 300-word |
| // buffer when long path support is enabled. The current directory may also |
| // change between subsequent calls of GetCurrentDirectory. As a result, we |
| // need to retry the call in a loop until the current directory fits, each |
| // time with a bigger buffer. |
| for { |
| n, e := GetCurrentDirectory(uint32(len(b)), &b[0]) |
| if e != nil { |
| return "", e |
| } |
| if int(n) <= len(b) { |
| return UTF16ToString(b[:n]), nil |
| } |
| b = make([]uint16, n) |
| } |
| } |
| |
| 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 MoveFile(from, to) |
| } |
| |
| 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 UTF16ToString(b[: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 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 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 := Filetime{} |
| w := Filetime{} |
| if tv[0].Nanoseconds() != 0 { |
| a = NsecToFiletime(tv[0].Nanoseconds()) |
| } |
| if tv[0].Nanoseconds() != 0 { |
| w = NsecToFiletime(tv[1].Nanoseconds()) |
| } |
| return SetFileTime(h, nil, &a, &w) |
| } |
| |
| // This matches the value in os/file_windows.go. |
| const _UTIME_OMIT = -1 |
| |
| func UtimesNano(path string, ts []Timespec) (err error) { |
| if len(ts) != 2 { |
| return 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 := Filetime{} |
| w := Filetime{} |
| if ts[0].Nsec != _UTIME_OMIT { |
| a = NsecToFiletime(TimespecToNsec(ts[0])) |
| } |
| if ts[1].Nsec != _UTIME_OMIT { |
| 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) { |
| 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 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 |
| |
| // 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 [100]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, 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) |
| sa.raw.Addr = sa.Addr |
| 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, 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 |
| sa.raw.Addr = sa.Addr |
| return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil |
| } |
| |
| type RawSockaddrUnix struct { |
| Family uint16 |
| Path [UNIX_PATH_MAX]int8 |
| } |
| |
| type SockaddrUnix struct { |
| Name string |
| raw RawSockaddrUnix |
| } |
| |
| func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, int32, error) { |
| name := sa.Name |
| n := len(name) |
| if n > len(sa.raw.Path) { |
| return nil, 0, EINVAL |
| } |
| if n == len(sa.raw.Path) && name[0] != '@' { |
| return nil, 0, EINVAL |
| } |
| sa.raw.Family = AF_UNIX |
| for i := 0; i < n; i++ { |
| sa.raw.Path[i] = int8(name[i]) |
| } |
| // length is family (uint16), name, NUL. |
| sl := int32(2) |
| if n > 0 { |
| sl += int32(n) + 1 |
| } |
| if sa.raw.Path[0] == '@' || (sa.raw.Path[0] == 0 && sl > 3) { |
| // Check sl > 3 so we don't change unnamed socket behavior. |
| sa.raw.Path[0] = 0 |
| // Don't count trailing NUL for abstract address. |
| sl-- |
| } |
| |
| return unsafe.Pointer(&sa.raw), sl, nil |
| } |
| |
| func (rsa *RawSockaddrAny) Sockaddr() (Sockaddr, error) { |
| switch rsa.Addr.Family { |
| case AF_UNIX: |
| pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) |
| sa := new(SockaddrUnix) |
| if pp.Path[0] == 0 { |
| // "Abstract" Unix domain socket. |
| // Rewrite leading NUL as @ for textual display. |
| // (This is the standard convention.) |
| // Not friendly to overwrite in place, |
| // but the callers below don't care. |
| pp.Path[0] = '@' |
| } |
| |
| // Assume path ends at NUL. |
| // This is not technically the Linux semantics for |
| // abstract Unix domain sockets--they are supposed |
| // to be uninterpreted fixed-size binary blobs--but |
| // everyone uses this convention. |
| n := 0 |
| for n < len(pp.Path) && pp.Path[n] != 0 { |
| n++ |
| } |
| sa.Name = string(unsafe.Slice((*byte)(unsafe.Pointer(&pp.Path[0])), n)) |
| return sa, nil |
| |
| 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]) |
| sa.Addr = pp.Addr |
| 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 |
| sa.Addr = pp.Addr |
| return sa, nil |
| } |
| return nil, EAFNOSUPPORT |
| } |
| |
| func Socket(domain, typ, proto int) (fd Handle, err error) { |
| if domain == AF_INET6 && SocketDisableIPv6 { |
| return InvalidHandle, 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) { |
| var rsa unsafe.Pointer |
| var len int32 |
| if to != nil { |
| rsa, len, err = to.sockaddr() |
| if err != nil { |
| return err |
| } |
| } |
| r1, _, e1 := Syscall9(procWSASendTo.Addr(), 9, uintptr(s), uintptr(unsafe.Pointer(bufs)), uintptr(bufcnt), uintptr(unsafe.Pointer(sent)), uintptr(flags), uintptr(unsafe.Pointer(rsa)), uintptr(len), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine))) |
| if r1 == socket_error { |
| if e1 != 0 { |
| err = errnoErr(e1) |
| } else { |
| err = EINVAL |
| } |
| } |
| return err |
| } |
| |
| func wsaSendtoInet4(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to *SockaddrInet4, overlapped *Overlapped, croutine *byte) (err error) { |
| rsa, len, err := to.sockaddr() |
| if err != nil { |
| return err |
| } |
| r1, _, e1 := Syscall9(procWSASendTo.Addr(), 9, uintptr(s), uintptr(unsafe.Pointer(bufs)), uintptr(bufcnt), uintptr(unsafe.Pointer(sent)), uintptr(flags), uintptr(unsafe.Pointer(rsa)), uintptr(len), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine))) |
| if r1 == socket_error { |
| if e1 != 0 { |
| err = errnoErr(e1) |
| } else { |
| err = EINVAL |
| } |
| } |
| return err |
| } |
| |
| func wsaSendtoInet6(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to *SockaddrInet6, overlapped *Overlapped, croutine *byte) (err error) { |
| rsa, len, err := to.sockaddr() |
| if err != nil { |
| return err |
| } |
| r1, _, e1 := Syscall9(procWSASendTo.Addr(), 9, uintptr(s), uintptr(unsafe.Pointer(bufs)), uintptr(bufcnt), uintptr(unsafe.Pointer(sent)), uintptr(flags), uintptr(unsafe.Pointer(rsa)), uintptr(len), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine))) |
| if r1 == socket_error { |
| if e1 != 0 { |
| err = errnoErr(e1) |
| } else { |
| err = EINVAL |
| } |
| } |
| return err |
| } |
| |
| 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 := 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 = 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) |
| } |
| |
| // 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 syscall 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, EWINDOWS } |
| func Recvfrom(fd Handle, p []byte, flags int) (n int, from Sockaddr, err error) { |
| return 0, nil, EWINDOWS |
| } |
| func Sendto(fd Handle, p []byte, flags int, to Sockaddr) (err error) { return EWINDOWS } |
| func SetsockoptTimeval(fd Handle, level, opt int, tv *Timeval) (err error) { return 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) { |
| optval := int32(0) |
| optlen := int32(unsafe.Sizeof(optval)) |
| err := Getsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&optval)), &optlen) |
| return int(optval), err |
| } |
| |
| 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 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) |
| } |
| |
| func fdpath(fd Handle, buf []uint16) ([]uint16, error) { |
| const ( |
| FILE_NAME_NORMALIZED = 0 |
| VOLUME_NAME_DOS = 0 |
| ) |
| for { |
| n, err := getFinalPathNameByHandle(fd, &buf[0], uint32(len(buf)), FILE_NAME_NORMALIZED|VOLUME_NAME_DOS) |
| if err == nil { |
| buf = buf[:n] |
| break |
| } |
| if err != _ERROR_NOT_ENOUGH_MEMORY { |
| return nil, err |
| } |
| buf = append(buf, make([]uint16, n-uint32(len(buf)))...) |
| } |
| return buf, nil |
| } |
| |
| func Fchdir(fd Handle) (err error) { |
| var buf [MAX_PATH + 1]uint16 |
| path, err := fdpath(fd, buf[:]) |
| if err != nil { |
| return err |
| } |
| // When using VOLUME_NAME_DOS, the path is always prefixed by "\\?\". |
| // That prefix tells the Windows APIs to disable all string parsing and to send |
| // the string that follows it straight to the file system. |
| // Although SetCurrentDirectory and GetCurrentDirectory do support the "\\?\" prefix, |
| // some other Windows APIs don't. If the prefix is not removed here, it will leak |
| // to Getwd, and we don't want such a general-purpose function to always return a |
| // path with the "\\?\" prefix after Fchdir is called. |
| // The downside is that APIs that do support it will parse the path and try to normalize it, |
| // when it's already normalized. |
| if len(path) >= 4 && path[0] == '\\' && path[1] == '\\' && path[2] == '?' && path[3] == '\\' { |
| path = path[4:] |
| } |
| return SetCurrentDirectory(&path[0]) |
| } |
| |
| // TODO(brainman): fix all needed for os |
| func Link(oldpath, newpath string) (err error) { return EWINDOWS } |
| func Symlink(path, link string) (err error) { return EWINDOWS } |
| |
| func Fchmod(fd Handle, mode uint32) (err error) { return EWINDOWS } |
| func Chown(path string, uid int, gid int) (err error) { return EWINDOWS } |
| func Lchown(path string, uid int, gid int) (err error) { return EWINDOWS } |
| func Fchown(fd Handle, uid int, gid int) (err error) { return 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, 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.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.SubstituteNameOffset/2 : (data.SubstituteNameOffset+data.SubstituteNameLength)/2]) |
| if data.Flags&_SYMLINK_FLAG_RELATIVE == 0 { |
| if len(s) >= 4 && s[:4] == `\??\` { |
| s = s[4:] |
| switch { |
| case len(s) >= 2 && s[1] == ':': // \??\C:\foo\bar |
| // do nothing |
| case len(s) >= 4 && s[:4] == `UNC\`: // \??\UNC\foo\bar |
| s = `\\` + s[4:] |
| default: |
| // unexpected; do nothing |
| } |
| } else { |
| // unexpected; do nothing |
| } |
| } |
| case _IO_REPARSE_TAG_MOUNT_POINT: |
| data := (*mountPointReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer)) |
| p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0])) |
| s = UTF16ToString(p[data.SubstituteNameOffset/2 : (data.SubstituteNameOffset+data.SubstituteNameLength)/2]) |
| if len(s) >= 4 && s[:4] == `\??\` { // \??\C:\foo\bar |
| s = s[4:] |
| } else { |
| // unexpected; do nothing |
| } |
| default: |
| // the path is not a symlink or junction but another type of reparse |
| // point |
| return -1, ENOENT |
| } |
| n = copy(buf, []byte(s)) |
| |
| return n, nil |
| } |
| |
| // Deprecated: CreateIoCompletionPort has the wrong function signature. Use x/sys/windows.CreateIoCompletionPort. |
| func CreateIoCompletionPort(filehandle Handle, cphandle Handle, key uint32, threadcnt uint32) (Handle, error) { |
| return createIoCompletionPort(filehandle, cphandle, uintptr(key), threadcnt) |
| } |
| |
| // Deprecated: GetQueuedCompletionStatus has the wrong function signature. Use x/sys/windows.GetQueuedCompletionStatus. |
| func GetQueuedCompletionStatus(cphandle Handle, qty *uint32, key *uint32, overlapped **Overlapped, timeout uint32) error { |
| var ukey uintptr |
| var pukey *uintptr |
| if key != nil { |
| ukey = uintptr(*key) |
| pukey = &ukey |
| } |
| err := getQueuedCompletionStatus(cphandle, qty, pukey, overlapped, timeout) |
| if key != nil { |
| *key = uint32(ukey) |
| if uintptr(*key) != ukey && err == nil { |
| err = errorspkg.New("GetQueuedCompletionStatus returned key overflow") |
| } |
| } |
| return err |
| } |
| |
| // Deprecated: PostQueuedCompletionStatus has the wrong function signature. Use x/sys/windows.PostQueuedCompletionStatus. |
| func PostQueuedCompletionStatus(cphandle Handle, qty uint32, key uint32, overlapped *Overlapped) error { |
| return postQueuedCompletionStatus(cphandle, qty, uintptr(key), overlapped) |
| } |
| |
| // newProcThreadAttributeList allocates new PROC_THREAD_ATTRIBUTE_LIST, with |
| // the requested maximum number of attributes, which must be cleaned up by |
| // deleteProcThreadAttributeList. |
| func newProcThreadAttributeList(maxAttrCount uint32) (*_PROC_THREAD_ATTRIBUTE_LIST, error) { |
| var size uintptr |
| err := initializeProcThreadAttributeList(nil, maxAttrCount, 0, &size) |
| if err != ERROR_INSUFFICIENT_BUFFER { |
| if err == nil { |
| return nil, errorspkg.New("unable to query buffer size from InitializeProcThreadAttributeList") |
| } |
| return nil, err |
| } |
| // size is guaranteed to be ≥1 by initializeProcThreadAttributeList. |
| al := (*_PROC_THREAD_ATTRIBUTE_LIST)(unsafe.Pointer(&make([]byte, size)[0])) |
| err = initializeProcThreadAttributeList(al, maxAttrCount, 0, &size) |
| if err != nil { |
| return nil, err |
| } |
| return al, nil |
| } |
| |
| // RegEnumKeyEx enumerates the subkeys of an open registry key. |
| // Each call retrieves information about one subkey. name is |
| // a buffer that should be large enough to hold the name of the |
| // subkey plus a null terminating character. nameLen is its |
| // length. On return, nameLen will contain the actual length of the |
| // subkey. |
| // |
| // Should name not be large enough to hold the subkey, this function |
| // will return ERROR_MORE_DATA, and must be called again with an |
| // appropriately sized buffer. |
| // |
| // reserved must be nil. class and classLen behave like name and nameLen |
| // but for the class of the subkey, except that they are optional. |
| // lastWriteTime, if not nil, will be populated with the time the subkey |
| // was last written. |
| // |
| // The caller must enumerate all subkeys in order. That is |
| // RegEnumKeyEx must be called with index starting at 0, incrementing |
| // the index until the function returns ERROR_NO_MORE_ITEMS, or with |
| // the index of the last subkey (obtainable from RegQueryInfoKey), |
| // decrementing until index 0 is enumerated. |
| // |
| // Successive calls to this API must happen on the same OS thread, |
| // so call [runtime.LockOSThread] before calling this function. |
| func RegEnumKeyEx(key Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, class *uint16, classLen *uint32, lastWriteTime *Filetime) (regerrno error) { |
| return regEnumKeyEx(key, index, name, nameLen, reserved, class, classLen, lastWriteTime) |
| } |
| |
| func GetStartupInfo(startupInfo *StartupInfo) error { |
| getStartupInfo(startupInfo) |
| return nil |
| } |
