1 files changed, 46 insertions, 0 deletions
diff --git a/src/internal/testenv/testenv_notwin.go b/src/internal/testenv/testenv_notwin.go
new file mode 100644
index 0000000..30e159a
--- /dev/null
+++ b/src/internal/testenv/testenv_notwin.go
@@ -0,0 +1,46 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !windows
+
+package testenv
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+)
+
+func hasSymlink() (ok bool, reason string) {
+	switch runtime.GOOS {
+	case "plan9":
+		return false, ""
+	case "android", "wasip1":
+		// For wasip1, some runtimes forbid absolute symlinks,
+		// or symlinks that escape the current working directory.
+		// Perform a simple test to see whether the runtime
+		// supports symlinks or not. If we get a permission
+		// error, the runtime does not support symlinks.
+		dir, err := os.MkdirTemp("", "")
+		if err != nil {
+			return false, ""
+		}
+		defer func() {
+			_ = os.RemoveAll(dir)
+		}()
+		fpath := filepath.Join(dir, "testfile.txt")
+		if err := os.WriteFile(fpath, nil, 0644); err != nil {
+			return false, ""
+		}
+		if err := os.Symlink(fpath, filepath.Join(dir, "testlink")); err != nil {
+			if SyscallIsNotSupported(err) {
+				return false, fmt.Sprintf("symlinks unsupported: %s", err.Error())
+			}
+			return false, ""
+		}
+	}
+
+	return true, ""
+}