forked from syncthing/syncthing
/
basicfs_unix.go
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/
basicfs_unix.go
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// Copyright (C) 2016 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/.
// +build !windows
package fs
import (
"fmt"
"os"
"path/filepath"
"strings"
)
func (BasicFilesystem) SymlinksSupported() bool {
return true
}
func (f *BasicFilesystem) CreateSymlink(target, name string) error {
name, err := f.rooted(name)
if err != nil {
return err
}
return os.Symlink(target, name)
}
func (f *BasicFilesystem) ReadSymlink(name string) (string, error) {
name, err := f.rooted(name)
if err != nil {
return "", err
}
return os.Readlink(name)
}
func (f *BasicFilesystem) mkdirAll(path string, perm os.FileMode) error {
return os.MkdirAll(path, perm)
}
// Unhide is a noop on unix, as unhiding files requires renaming them.
// We still check that the relative path does not try to escape the root
func (f *BasicFilesystem) Unhide(name string) error {
_, err := f.rooted(name)
return err
}
// Hide is a noop on unix, as hiding files requires renaming them.
// We still check that the relative path does not try to escape the root
func (f *BasicFilesystem) Hide(name string) error {
_, err := f.rooted(name)
return err
}
func (f *BasicFilesystem) Roots() ([]string, error) {
return []string{"/"}, nil
}
// unrootedChecked returns the path relative to the folder root (same as
// unrooted). It panics if the given path is not a subpath and handles the
// special case when the given path is the folder root without a trailing
// pathseparator.
func (f *BasicFilesystem) unrootedChecked(absPath, root string) string {
if absPath+string(PathSeparator) == root {
return "."
}
if !strings.HasPrefix(absPath, root) {
panic(fmt.Sprintf("bug: Notify backend is processing a change outside of the filesystem root: f.root==%v, root==%v, path==%v", f.root, root, absPath))
}
return rel(absPath, root)
}
func rel(path, prefix string) string {
return strings.TrimPrefix(strings.TrimPrefix(path, prefix), string(PathSeparator))
}
var evalSymlinks = filepath.EvalSymlinks