syncthing/lib/fs/basicfs_fileinfo_windows.go

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// Copyright (C) 2017 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package fs
import (
"os"
"path/filepath"
"strings"
"time"
)
var execExts map[string]bool
func init() {
// PATHEXT contains a list of executable file extensions, on Windows
pathext := filepath.SplitList(os.Getenv("PATHEXT"))
// We want the extensions in execExts to be lower case
execExts = make(map[string]bool, len(pathext))
for _, ext := range pathext {
execExts[strings.ToLower(ext)] = true
}
}
// isWindowsExecutable returns true if the given path has an extension that is
// in the list of executable extensions.
func isWindowsExecutable(path string) bool {
return execExts[strings.ToLower(filepath.Ext(path))]
}
func (e basicFileInfo) Mode() FileMode {
m := e.FileInfo.Mode()
if m&os.ModeSymlink != 0 && e.Size() > 0 {
// "Symlinks" with nonzero size are in fact "hard" links, such as
// NTFS deduped files. Remove the symlink bit.
m &^= os.ModeSymlink
}
// Set executable bits on files with executable extensions (.exe, .bat, etc).
if isWindowsExecutable(e.Name()) {
m |= 0111
}
// There is no user/group/others in Windows' read-only attribute, and
// all "w" bits are set if the file is not read-only. Do not send these
// group/others-writable bits to other devices in order to avoid
// unexpected world-writable files on other platforms.
m &^= 0022
return FileMode(m)
}
func (e basicFileInfo) Owner() int {
return -1
}
func (e basicFileInfo) Group() int {
return -1
}
func (basicFileInfo) InodeChangeTime() time.Time {
return time.Time{}
}
// osFileInfo converts e to os.FileInfo that is suitable
// to be passed to os.SameFile.
func (e *basicFileInfo) osFileInfo() os.FileInfo {
fi := e.FileInfo
if fi, ok := fi.(*dirJunctFileInfo); ok {
return fi.FileInfo
}
return fi
}