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46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build !windows
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package testenv
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import (
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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)
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func hasSymlink() (ok bool, reason string) {
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switch runtime.GOOS {
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case "plan9":
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return false, ""
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case "android", "wasip1":
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// For wasip1, some runtimes forbid absolute symlinks,
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// or symlinks that escape the current working directory.
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// Perform a simple test to see whether the runtime
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// supports symlinks or not. If we get a permission
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// error, the runtime does not support symlinks.
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dir, err := os.MkdirTemp("", "")
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if err != nil {
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return false, ""
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}
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defer func() {
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_ = os.RemoveAll(dir)
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}()
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fpath := filepath.Join(dir, "testfile.txt")
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if err := os.WriteFile(fpath, nil, 0644); err != nil {
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return false, ""
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}
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if err := os.Symlink(fpath, filepath.Join(dir, "testlink")); err != nil {
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if SyscallIsNotSupported(err) {
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return false, fmt.Sprintf("symlinks unsupported: %s", err.Error())
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}
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return false, ""
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}
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}
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return true, ""
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}
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