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Diffstat (limited to 'src/pkg/os/file_windows.go')
-rw-r--r--src/pkg/os/file_windows.go595
1 files changed, 0 insertions, 595 deletions
diff --git a/src/pkg/os/file_windows.go b/src/pkg/os/file_windows.go
deleted file mode 100644
index e78d4abf6..000000000
--- a/src/pkg/os/file_windows.go
+++ /dev/null
@@ -1,595 +0,0 @@
-// 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.
-
-package os
-
-import (
- "io"
- "runtime"
- "sync"
- "syscall"
- "unicode/utf16"
- "unicode/utf8"
- "unsafe"
-)
-
-// File represents an open file descriptor.
-type File struct {
- *file
-}
-
-// file is the real representation of *File.
-// The extra level of indirection ensures that no clients of os
-// can overwrite this data, which could cause the finalizer
-// to close the wrong file descriptor.
-type file struct {
- fd syscall.Handle
- name string
- dirinfo *dirInfo // nil unless directory being read
- l sync.Mutex // used to implement windows pread/pwrite
-
- // only for console io
- isConsole bool
- lastbits []byte // first few bytes of the last incomplete rune in last write
- readbuf []rune // input console buffer
-}
-
-// Fd returns the Windows handle referencing the open file.
-func (file *File) Fd() uintptr {
- if file == nil {
- return uintptr(syscall.InvalidHandle)
- }
- return uintptr(file.fd)
-}
-
-// newFile returns a new File with the given file handle and name.
-// Unlike NewFile, it does not check that h is syscall.InvalidHandle.
-func newFile(h syscall.Handle, name string) *File {
- f := &File{&file{fd: h, name: name}}
- var m uint32
- if syscall.GetConsoleMode(f.fd, &m) == nil {
- f.isConsole = true
- }
- runtime.SetFinalizer(f.file, (*file).close)
- return f
-}
-
-// NewFile returns a new File with the given file descriptor and name.
-func NewFile(fd uintptr, name string) *File {
- h := syscall.Handle(fd)
- if h == syscall.InvalidHandle {
- return nil
- }
- return newFile(h, name)
-}
-
-// Auxiliary information if the File describes a directory
-type dirInfo struct {
- data syscall.Win32finddata
- needdata bool
- path string
- isempty bool // set if FindFirstFile returns ERROR_FILE_NOT_FOUND
-}
-
-func epipecheck(file *File, e error) {
-}
-
-const DevNull = "NUL"
-
-func (f *file) isdir() bool { return f != nil && f.dirinfo != nil }
-
-func openFile(name string, flag int, perm FileMode) (file *File, err error) {
- r, e := syscall.Open(name, flag|syscall.O_CLOEXEC, syscallMode(perm))
- if e != nil {
- return nil, e
- }
- return NewFile(uintptr(r), name), nil
-}
-
-func openDir(name string) (file *File, err error) {
- maskp, e := syscall.UTF16PtrFromString(name + `\*`)
- if e != nil {
- return nil, e
- }
- d := new(dirInfo)
- r, e := syscall.FindFirstFile(maskp, &d.data)
- if e != nil {
- // FindFirstFile returns ERROR_FILE_NOT_FOUND when
- // no matching files can be found. Then, if directory
- // exists, we should proceed.
- if e != syscall.ERROR_FILE_NOT_FOUND {
- return nil, e
- }
- var fa syscall.Win32FileAttributeData
- namep, e := syscall.UTF16PtrFromString(name)
- if e != nil {
- return nil, e
- }
- e = syscall.GetFileAttributesEx(namep, syscall.GetFileExInfoStandard, (*byte)(unsafe.Pointer(&fa)))
- if e != nil {
- return nil, e
- }
- if fa.FileAttributes&syscall.FILE_ATTRIBUTE_DIRECTORY == 0 {
- return nil, e
- }
- d.isempty = true
- }
- d.path = name
- if !isAbs(d.path) {
- d.path, e = syscall.FullPath(d.path)
- if e != nil {
- return nil, e
- }
- }
- f := newFile(r, name)
- f.dirinfo = d
- return f, nil
-}
-
-// OpenFile is the generalized open call; most users will use Open
-// or Create instead. It opens the named file with specified flag
-// (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful,
-// methods on the returned File can be used for I/O.
-// If there is an error, it will be of type *PathError.
-func OpenFile(name string, flag int, perm FileMode) (file *File, err error) {
- if name == "" {
- return nil, &PathError{"open", name, syscall.ENOENT}
- }
- r, errf := openFile(name, flag, perm)
- if errf == nil {
- return r, nil
- }
- r, errd := openDir(name)
- if errd == nil {
- if flag&O_WRONLY != 0 || flag&O_RDWR != 0 {
- r.Close()
- return nil, &PathError{"open", name, syscall.EISDIR}
- }
- return r, nil
- }
- return nil, &PathError{"open", name, errf}
-}
-
-// Close closes the File, rendering it unusable for I/O.
-// It returns an error, if any.
-func (file *File) Close() error {
- if file == nil {
- return ErrInvalid
- }
- return file.file.close()
-}
-
-func (file *file) close() error {
- if file == nil {
- return syscall.EINVAL
- }
- if file.isdir() && file.dirinfo.isempty {
- // "special" empty directories
- return nil
- }
- if file.fd == syscall.InvalidHandle {
- return syscall.EINVAL
- }
- var e error
- if file.isdir() {
- e = syscall.FindClose(syscall.Handle(file.fd))
- } else {
- e = syscall.CloseHandle(syscall.Handle(file.fd))
- }
- var err error
- if e != nil {
- err = &PathError{"close", file.name, e}
- }
- file.fd = syscall.InvalidHandle // so it can't be closed again
-
- // no need for a finalizer anymore
- runtime.SetFinalizer(file, nil)
- return err
-}
-
-func (file *File) readdir(n int) (fi []FileInfo, err error) {
- if file == nil {
- return nil, syscall.EINVAL
- }
- if !file.isdir() {
- return nil, &PathError{"Readdir", file.name, syscall.ENOTDIR}
- }
- if !file.dirinfo.isempty && file.fd == syscall.InvalidHandle {
- return nil, syscall.EINVAL
- }
- wantAll := n <= 0
- size := n
- if wantAll {
- n = -1
- size = 100
- }
- fi = make([]FileInfo, 0, size) // Empty with room to grow.
- d := &file.dirinfo.data
- for n != 0 && !file.dirinfo.isempty {
- if file.dirinfo.needdata {
- e := syscall.FindNextFile(syscall.Handle(file.fd), d)
- if e != nil {
- if e == syscall.ERROR_NO_MORE_FILES {
- break
- } else {
- err = &PathError{"FindNextFile", file.name, e}
- if !wantAll {
- fi = nil
- }
- return
- }
- }
- }
- file.dirinfo.needdata = true
- name := string(syscall.UTF16ToString(d.FileName[0:]))
- if name == "." || name == ".." { // Useless names
- continue
- }
- f := &fileStat{
- name: name,
- sys: syscall.Win32FileAttributeData{
- FileAttributes: d.FileAttributes,
- CreationTime: d.CreationTime,
- LastAccessTime: d.LastAccessTime,
- LastWriteTime: d.LastWriteTime,
- FileSizeHigh: d.FileSizeHigh,
- FileSizeLow: d.FileSizeLow,
- },
- path: file.dirinfo.path + `\` + name,
- }
- n--
- fi = append(fi, f)
- }
- if !wantAll && len(fi) == 0 {
- return fi, io.EOF
- }
- return fi, nil
-}
-
-// readConsole reads utf16 characters from console File,
-// encodes them into utf8 and stores them in buffer b.
-// It returns the number of utf8 bytes read and an error, if any.
-func (f *File) readConsole(b []byte) (n int, err error) {
- if len(b) == 0 {
- return 0, nil
- }
- if len(f.readbuf) == 0 {
- // syscall.ReadConsole seems to fail, if given large buffer.
- // So limit the buffer to 16000 characters.
- numBytes := len(b)
- if numBytes > 16000 {
- numBytes = 16000
- }
- // get more input data from os
- wchars := make([]uint16, numBytes)
- var p *uint16
- if len(b) > 0 {
- p = &wchars[0]
- }
- var nw uint32
- err := syscall.ReadConsole(f.fd, p, uint32(len(wchars)), &nw, nil)
- if err != nil {
- return 0, err
- }
- f.readbuf = utf16.Decode(wchars[:nw])
- }
- for i, r := range f.readbuf {
- if utf8.RuneLen(r) > len(b) {
- f.readbuf = f.readbuf[i:]
- return n, nil
- }
- nr := utf8.EncodeRune(b, r)
- b = b[nr:]
- n += nr
- }
- f.readbuf = nil
- return n, nil
-}
-
-// read reads up to len(b) bytes from the File.
-// It returns the number of bytes read and an error, if any.
-func (f *File) read(b []byte) (n int, err error) {
- f.l.Lock()
- defer f.l.Unlock()
- if f.isConsole {
- return f.readConsole(b)
- }
- return syscall.Read(f.fd, b)
-}
-
-// pread reads len(b) bytes from the File starting at byte offset off.
-// It returns the number of bytes read and the error, if any.
-// EOF is signaled by a zero count with err set to 0.
-func (f *File) pread(b []byte, off int64) (n int, err error) {
- f.l.Lock()
- defer f.l.Unlock()
- curoffset, e := syscall.Seek(f.fd, 0, 1)
- if e != nil {
- return 0, e
- }
- defer syscall.Seek(f.fd, curoffset, 0)
- o := syscall.Overlapped{
- OffsetHigh: uint32(off >> 32),
- Offset: uint32(off),
- }
- var done uint32
- e = syscall.ReadFile(syscall.Handle(f.fd), b, &done, &o)
- if e != nil {
- if e == syscall.ERROR_HANDLE_EOF {
- // end of file
- return 0, nil
- }
- return 0, e
- }
- return int(done), nil
-}
-
-// writeConsole writes len(b) bytes to the console File.
-// It returns the number of bytes written and an error, if any.
-func (f *File) writeConsole(b []byte) (n int, err error) {
- n = len(b)
- runes := make([]rune, 0, 256)
- if len(f.lastbits) > 0 {
- b = append(f.lastbits, b...)
- f.lastbits = nil
-
- }
- for len(b) >= utf8.UTFMax || utf8.FullRune(b) {
- r, l := utf8.DecodeRune(b)
- runes = append(runes, r)
- b = b[l:]
- }
- if len(b) > 0 {
- f.lastbits = make([]byte, len(b))
- copy(f.lastbits, b)
- }
- // syscall.WriteConsole seems to fail, if given large buffer.
- // So limit the buffer to 16000 characters. This number was
- // discovered by experimenting with syscall.WriteConsole.
- const maxWrite = 16000
- for len(runes) > 0 {
- m := len(runes)
- if m > maxWrite {
- m = maxWrite
- }
- chunk := runes[:m]
- runes = runes[m:]
- uint16s := utf16.Encode(chunk)
- for len(uint16s) > 0 {
- var written uint32
- err = syscall.WriteConsole(f.fd, &uint16s[0], uint32(len(uint16s)), &written, nil)
- if err != nil {
- return 0, nil
- }
- uint16s = uint16s[written:]
- }
- }
- return n, nil
-}
-
-// write writes len(b) bytes to the File.
-// It returns the number of bytes written and an error, if any.
-func (f *File) write(b []byte) (n int, err error) {
- f.l.Lock()
- defer f.l.Unlock()
- if f.isConsole {
- return f.writeConsole(b)
- }
- return syscall.Write(f.fd, b)
-}
-
-// pwrite writes len(b) bytes to the File starting at byte offset off.
-// It returns the number of bytes written and an error, if any.
-func (f *File) pwrite(b []byte, off int64) (n int, err error) {
- f.l.Lock()
- defer f.l.Unlock()
- curoffset, e := syscall.Seek(f.fd, 0, 1)
- if e != nil {
- return 0, e
- }
- defer syscall.Seek(f.fd, curoffset, 0)
- o := syscall.Overlapped{
- OffsetHigh: uint32(off >> 32),
- Offset: uint32(off),
- }
- var done uint32
- e = syscall.WriteFile(syscall.Handle(f.fd), b, &done, &o)
- if e != nil {
- return 0, e
- }
- return int(done), nil
-}
-
-// seek sets the offset for the next Read or Write on file to offset, interpreted
-// according to whence: 0 means relative to the origin of the file, 1 means
-// relative to the current offset, and 2 means relative to the end.
-// It returns the new offset and an error, if any.
-func (f *File) seek(offset int64, whence int) (ret int64, err error) {
- f.l.Lock()
- defer f.l.Unlock()
- return syscall.Seek(f.fd, offset, whence)
-}
-
-// Truncate changes the size of the named file.
-// If the file is a symbolic link, it changes the size of the link's target.
-func Truncate(name string, size int64) error {
- f, e := OpenFile(name, O_WRONLY|O_CREATE, 0666)
- if e != nil {
- return e
- }
- defer f.Close()
- e1 := f.Truncate(size)
- if e1 != nil {
- return e1
- }
- return nil
-}
-
-// Remove removes the named file or directory.
-// If there is an error, it will be of type *PathError.
-func Remove(name string) error {
- p, e := syscall.UTF16PtrFromString(name)
- if e != nil {
- return &PathError{"remove", name, e}
- }
-
- // Go file interface forces us to know whether
- // name is a file or directory. Try both.
- e = syscall.DeleteFile(p)
- if e == nil {
- return nil
- }
- e1 := syscall.RemoveDirectory(p)
- if e1 == nil {
- return nil
- }
-
- // Both failed: figure out which error to return.
- if e1 != e {
- a, e2 := syscall.GetFileAttributes(p)
- if e2 != nil {
- e = e2
- } else {
- if a&syscall.FILE_ATTRIBUTE_DIRECTORY != 0 {
- e = e1
- }
- }
- }
- return &PathError{"remove", name, e}
-}
-
-// Pipe returns a connected pair of Files; reads from r return bytes written to w.
-// It returns the files and an error, if any.
-func Pipe() (r *File, w *File, err error) {
- var p [2]syscall.Handle
-
- // See ../syscall/exec.go for description of lock.
- syscall.ForkLock.RLock()
- e := syscall.Pipe(p[0:])
- if e != nil {
- syscall.ForkLock.RUnlock()
- return nil, nil, NewSyscallError("pipe", e)
- }
- syscall.CloseOnExec(p[0])
- syscall.CloseOnExec(p[1])
- syscall.ForkLock.RUnlock()
-
- return NewFile(uintptr(p[0]), "|0"), NewFile(uintptr(p[1]), "|1"), nil
-}
-
-// TempDir returns the default directory to use for temporary files.
-func TempDir() string {
- const pathSep = '\\'
- dirw := make([]uint16, syscall.MAX_PATH)
- n, _ := syscall.GetTempPath(uint32(len(dirw)), &dirw[0])
- if n > uint32(len(dirw)) {
- dirw = make([]uint16, n)
- n, _ = syscall.GetTempPath(uint32(len(dirw)), &dirw[0])
- if n > uint32(len(dirw)) {
- n = 0
- }
- }
- if n > 0 && dirw[n-1] == pathSep {
- n--
- }
- return string(utf16.Decode(dirw[0:n]))
-}
-
-// Link creates newname as a hard link to the oldname file.
-// If there is an error, it will be of type *LinkError.
-func Link(oldname, newname string) error {
- n, err := syscall.UTF16PtrFromString(newname)
- if err != nil {
- return &LinkError{"link", oldname, newname, err}
- }
- o, err := syscall.UTF16PtrFromString(oldname)
- if err != nil {
- return &LinkError{"link", oldname, newname, err}
- }
-
- e := syscall.CreateHardLink(n, o, 0)
- if e != nil {
- return &LinkError{"link", oldname, newname, err}
- }
- return nil
-}
-
-// Symlink creates newname as a symbolic link to oldname.
-// If there is an error, it will be of type *LinkError.
-func Symlink(oldname, newname string) error {
- // CreateSymbolicLink is not supported before Windows Vista
- if syscall.LoadCreateSymbolicLink() != nil {
- return &LinkError{"symlink", oldname, newname, syscall.EWINDOWS}
- }
-
- // '/' does not work in link's content
- oldname = fromSlash(oldname)
-
- // need the exact location of the oldname when its relative to determine if its a directory
- destpath := oldname
- if !isAbs(oldname) {
- destpath = dirname(newname) + `\` + oldname
- }
-
- fi, err := Lstat(destpath)
- isdir := err == nil && fi.IsDir()
-
- n, err := syscall.UTF16PtrFromString(newname)
- if err != nil {
- return &LinkError{"symlink", oldname, newname, err}
- }
- o, err := syscall.UTF16PtrFromString(oldname)
- if err != nil {
- return &LinkError{"symlink", oldname, newname, err}
- }
-
- var flags uint32
- if isdir {
- flags |= syscall.SYMBOLIC_LINK_FLAG_DIRECTORY
- }
- err = syscall.CreateSymbolicLink(n, o, flags)
- if err != nil {
- return &LinkError{"symlink", oldname, newname, err}
- }
- return nil
-}
-
-func fromSlash(path string) string {
- // Replace each '/' with '\\' if present
- var pathbuf []byte
- var lastSlash int
- for i, b := range path {
- if b == '/' {
- if pathbuf == nil {
- pathbuf = make([]byte, len(path))
- }
- copy(pathbuf[lastSlash:], path[lastSlash:i])
- pathbuf[i] = '\\'
- lastSlash = i + 1
- }
- }
- if pathbuf == nil {
- return path
- }
-
- copy(pathbuf[lastSlash:], path[lastSlash:])
- return string(pathbuf)
-}
-
-func dirname(path string) string {
- vol := volumeName(path)
- i := len(path) - 1
- for i >= len(vol) && !IsPathSeparator(path[i]) {
- i--
- }
- dir := path[len(vol) : i+1]
- last := len(dir) - 1
- if last > 0 && IsPathSeparator(dir[last]) {
- dir = dir[:last]
- }
- if dir == "" {
- dir = "."
- }
- return vol + dir
-}
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