44 lines
1.0 KiB
Go
44 lines
1.0 KiB
Go
// Copyright (C) 2022 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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//go:build linux || darwin
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// +build linux darwin
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package fs
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import (
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"errors"
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"fmt"
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"sort"
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"strings"
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"golang.org/x/sys/unix"
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)
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func listXattr(path string) ([]string, error) {
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buf := make([]byte, 1024)
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size, err := unix.Llistxattr(path, buf)
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if errors.Is(err, unix.ERANGE) {
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// Buffer is too small. Try again with a zero sized buffer to get
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// the size, then allocate a buffer of the correct size.
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size, err = unix.Llistxattr(path, nil)
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if err != nil {
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return nil, fmt.Errorf("Listxattr %s: %w", path, err)
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}
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buf = make([]byte, size)
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size, err = unix.Llistxattr(path, buf)
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}
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if err != nil {
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return nil, fmt.Errorf("Listxattr %s: %w", path, err)
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}
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buf = buf[:size]
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attrs := compact(strings.Split(string(buf), "\x00"))
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sort.Strings(attrs)
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return attrs, nil
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}
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