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https://github.com/golang/go
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syscall: revert API changes in Windows Win32finddata fix.
Preserve old API by using correct struct in system call and then copying the results, as we did for SetsockoptLinger. R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/6307065
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parent
0c2f0cca7c
commit
7ad37673e1
26
api/next.txt
26
api/next.txt
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@ -422,38 +422,12 @@ pkg syscall (darwin-amd64-cgo), type Termios struct, Pad_cgo_0 [4]byte
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pkg syscall (windows-386), const CREATE_NEW_PROCESS_GROUP ideal-int
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pkg syscall (windows-386), const CTRL_BREAK_EVENT ideal-int
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pkg syscall (windows-386), const CTRL_C_EVENT ideal-int
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pkg syscall (windows-386), func FindFirstFile1(*uint16, *Win32finddata1) (Handle, error)
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pkg syscall (windows-386), func FindNextFile1(Handle, *Win32finddata1) error
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pkg syscall (windows-386), func GetCurrentProcessId() uint32
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pkg syscall (windows-386), func Getsockopt(Handle, int32, int32, *byte, *int32) error
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pkg syscall (windows-386), type SysProcAttr struct, CreationFlags uint32
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pkg syscall (windows-386), type Win32finddata1 struct
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pkg syscall (windows-386), type Win32finddata1 struct, AlternateFileName [14]uint16
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pkg syscall (windows-386), type Win32finddata1 struct, CreationTime Filetime
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pkg syscall (windows-386), type Win32finddata1 struct, FileAttributes uint32
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pkg syscall (windows-386), type Win32finddata1 struct, FileName [MAX_PATH]uint16
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pkg syscall (windows-386), type Win32finddata1 struct, FileSizeHigh uint32
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pkg syscall (windows-386), type Win32finddata1 struct, FileSizeLow uint32
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pkg syscall (windows-386), type Win32finddata1 struct, LastAccessTime Filetime
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pkg syscall (windows-386), type Win32finddata1 struct, LastWriteTime Filetime
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pkg syscall (windows-386), type Win32finddata1 struct, Reserved0 uint32
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pkg syscall (windows-386), type Win32finddata1 struct, Reserved1 uint32
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pkg syscall (windows-amd64), const CREATE_NEW_PROCESS_GROUP ideal-int
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pkg syscall (windows-amd64), const CTRL_BREAK_EVENT ideal-int
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pkg syscall (windows-amd64), const CTRL_C_EVENT ideal-int
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pkg syscall (windows-amd64), func FindFirstFile1(*uint16, *Win32finddata1) (Handle, error)
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pkg syscall (windows-amd64), func FindNextFile1(Handle, *Win32finddata1) error
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pkg syscall (windows-amd64), func GetCurrentProcessId() uint32
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pkg syscall (windows-amd64), func Getsockopt(Handle, int32, int32, *byte, *int32) error
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pkg syscall (windows-amd64), type SysProcAttr struct, CreationFlags uint32
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pkg syscall (windows-amd64), type Win32finddata1 struct
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pkg syscall (windows-amd64), type Win32finddata1 struct, AlternateFileName [14]uint16
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pkg syscall (windows-amd64), type Win32finddata1 struct, CreationTime Filetime
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pkg syscall (windows-amd64), type Win32finddata1 struct, FileAttributes uint32
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pkg syscall (windows-amd64), type Win32finddata1 struct, FileName [MAX_PATH]uint16
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pkg syscall (windows-amd64), type Win32finddata1 struct, FileSizeHigh uint32
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pkg syscall (windows-amd64), type Win32finddata1 struct, FileSizeLow uint32
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pkg syscall (windows-amd64), type Win32finddata1 struct, LastAccessTime Filetime
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pkg syscall (windows-amd64), type Win32finddata1 struct, LastWriteTime Filetime
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pkg syscall (windows-amd64), type Win32finddata1 struct, Reserved0 uint32
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pkg syscall (windows-amd64), type Win32finddata1 struct, Reserved1 uint32
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@ -50,7 +50,7 @@ func NewFile(fd uintptr, name string) *File {
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// Auxiliary information if the File describes a directory
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type dirInfo struct {
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data syscall.Win32finddata1
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data syscall.Win32finddata
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needdata bool
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path string
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}
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@ -76,7 +76,7 @@ func openFile(name string, flag int, perm FileMode) (file *File, err error) {
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func openDir(name string) (file *File, err error) {
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d := new(dirInfo)
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r, e := syscall.FindFirstFile1(syscall.StringToUTF16Ptr(name+`\*`), &d.data)
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r, e := syscall.FindFirstFile(syscall.StringToUTF16Ptr(name+`\*`), &d.data)
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if e != nil {
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return nil, &PathError{"open", name, e}
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}
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@ -159,7 +159,7 @@ func (file *File) readdir(n int) (fi []FileInfo, err error) {
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d := &file.dirinfo.data
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for n != 0 {
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if file.dirinfo.needdata {
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e := syscall.FindNextFile1(syscall.Handle(file.fd), d)
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e := syscall.FindNextFile(syscall.Handle(file.fd), d)
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if e != nil {
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if e == syscall.ERROR_NO_MORE_FILES {
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break
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@ -7,7 +7,6 @@
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package syscall
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import (
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errorspkg "errors"
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"unicode/utf16"
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"unsafe"
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)
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@ -130,8 +129,8 @@ func NewCallback(fn interface{}) uintptr
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//sys SetFilePointer(handle Handle, lowoffset int32, highoffsetptr *int32, whence uint32) (newlowoffset uint32, err error) [failretval==0xffffffff]
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//sys CloseHandle(handle Handle) (err error)
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//sys GetStdHandle(stdhandle int) (handle Handle, err error) [failretval==InvalidHandle]
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//sys FindFirstFile1(name *uint16, data *Win32finddata1) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstFileW
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//sys FindNextFile1(handle Handle, data *Win32finddata1) (err error) = FindNextFileW
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//sys findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstFileW
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//sys findNextFile1(handle Handle, data *win32finddata1) (err error) = FindNextFileW
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//sys FindClose(handle Handle) (err error)
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//sys GetFileInformationByHandle(handle Handle, data *ByHandleFileInformation) (err error)
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//sys GetCurrentDirectory(buflen uint32, buf *uint16) (n uint32, err error) = GetCurrentDirectoryW
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@ -706,11 +705,29 @@ func SetsockoptIPv6Mreq(fd Handle, level, opt int, mreq *IPv6Mreq) (err error) {
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func Getpid() (pid int) { return int(GetCurrentProcessId()) }
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func FindFirstFile(name *uint16, data *Win32finddata) (handle Handle, err error) {
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return InvalidHandle, errorspkg.New("FindFirstFile is broken, use FindFirstFile1 instead")
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// NOTE(rsc): The Win32finddata struct is wrong for the system call:
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// the two paths are each one uint16 short. Use the correct struct,
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// a win32finddata1, and then copy the results out.
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// There is no loss of expressivity here, because the final
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// uint16, if it is used, is supposed to be a NUL, and Go doesn't need that.
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// For Go 1.1, we might avoid the allocation of win32finddata1 here
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// by adding a final Bug [2]uint16 field to the struct and then
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// adjusting the fields in the result directly.
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var data1 win32finddata1
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handle, err = findFirstFile1(name, &data1)
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if err == nil {
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copyFindData(data, &data1)
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}
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return
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}
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func FindNextFile(handle Handle, data *Win32finddata) (err error) {
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return errorspkg.New("FindNextFile is broken, use FindNextFile1 instead")
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var data1 win32finddata1
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err = findNextFile1(handle, &data1)
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if err == nil {
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copyFindData(data, &data1)
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}
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return
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}
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// TODO(brainman): fix all needed for os
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@ -310,7 +310,7 @@ func GetStdHandle(stdhandle int) (handle Handle, err error) {
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return
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}
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func FindFirstFile1(name *uint16, data *Win32finddata1) (handle Handle, err error) {
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func findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) {
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r0, _, e1 := Syscall(procFindFirstFileW.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(data)), 0)
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handle = Handle(r0)
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if handle == InvalidHandle {
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@ -323,7 +323,7 @@ func FindFirstFile1(name *uint16, data *Win32finddata1) (handle Handle, err erro
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return
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}
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func FindNextFile1(handle Handle, data *Win32finddata1) (err error) {
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func findNextFile1(handle Handle, data *win32finddata1) (err error) {
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r1, _, e1 := Syscall(procFindNextFileW.Addr(), 2, uintptr(handle), uintptr(unsafe.Pointer(data)), 0)
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if int(r1) == 0 {
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if e1 != 0 {
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@ -310,7 +310,7 @@ func GetStdHandle(stdhandle int) (handle Handle, err error) {
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return
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}
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func FindFirstFile1(name *uint16, data *Win32finddata1) (handle Handle, err error) {
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func findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) {
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r0, _, e1 := Syscall(procFindFirstFileW.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(data)), 0)
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handle = Handle(r0)
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if handle == InvalidHandle {
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@ -323,7 +323,7 @@ func FindFirstFile1(name *uint16, data *Win32finddata1) (handle Handle, err erro
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return
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}
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func FindNextFile1(handle Handle, data *Win32finddata1) (err error) {
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func findNextFile1(handle Handle, data *win32finddata1) (err error) {
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r1, _, e1 := Syscall(procFindNextFileW.Addr(), 2, uintptr(handle), uintptr(unsafe.Pointer(data)), 0)
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if int(r1) == 0 {
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if e1 != 0 {
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@ -338,9 +338,6 @@ func NsecToFiletime(nsec int64) (ft Filetime) {
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return ft
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}
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// Win32finddata is an incorrect struct definition, preserved for
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// backwards compatibility. Use Win32finddata1 and the
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// FindFirstFile1 and FindNextFile1 functions instead.
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type Win32finddata struct {
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FileAttributes uint32
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CreationTime Filetime
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@ -354,7 +351,9 @@ type Win32finddata struct {
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AlternateFileName [13]uint16
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}
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type Win32finddata1 struct {
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// This is the actual system call structure.
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// Win32finddata is what we committed to in Go 1.
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type win32finddata1 struct {
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FileAttributes uint32
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CreationTime Filetime
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LastAccessTime Filetime
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@ -367,6 +366,23 @@ type Win32finddata1 struct {
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AlternateFileName [14]uint16
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}
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func copyFindData(dst *Win32finddata, src *win32finddata1) {
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dst.FileAttributes = src.FileAttributes
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dst.CreationTime = src.CreationTime
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dst.LastAccessTime = src.LastAccessTime
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dst.LastWriteTime = src.LastWriteTime
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dst.FileSizeHigh = src.FileSizeHigh
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dst.FileSizeLow = src.FileSizeLow
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dst.Reserved0 = src.Reserved0
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dst.Reserved1 = src.Reserved1
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// The src is 1 element shorter than dst. Zero that last one.
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copy(dst.FileName[:], src.FileName[:])
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dst.FileName[len(dst.FileName)-1] = 0
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copy(dst.AlternateFileName[:], src.AlternateFileName[:])
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src.AlternateFileName[len(dst.AlternateFileName)-1] = 0
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}
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type ByHandleFileInformation struct {
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FileAttributes uint32
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CreationTime Filetime
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