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