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765b519643
macOS doesn't like the test, in the setup where it creates a unix-domain socket: ``` atomicfile_test.go:27: listen unix /var/folders/_2/42v283xx1xgbjdbyvhlm13hc0000gp/T/TestDoesNotOverwriteIrregularFiles1507752327/001/special: bind: invalid argument ``` I think at this point we should assume the socket as written in the test only works on Linux. Updates #7658 Signed-off-by: Denton Gentry <dgentry@tailscale.com>
39 lines
965 B
Go
39 lines
965 B
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build linux
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package atomicfile
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import (
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"net"
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"path/filepath"
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"strings"
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"testing"
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)
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func TestDoesNotOverwriteIrregularFiles(t *testing.T) {
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// Per tailscale/tailscale#7658 as one example, almost any imagined use of
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// atomicfile.Write should likely not attempt to overwrite an irregular file
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// such as a device node, socket, or named pipe.
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d := t.TempDir()
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special := filepath.Join(d, "special")
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// The least troublesome thing to make that is not a file is a unix socket.
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// Making a null device sadly requries root.
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l, err := net.ListenUnix("unix", &net.UnixAddr{Name: special, Net: "unix"})
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if err != nil {
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t.Fatal(err)
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}
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defer l.Close()
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err = WriteFile(special, []byte("hello"), 0644)
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if err == nil {
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t.Fatal("expected error, got nil")
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}
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if !strings.Contains(err.Error(), "is not a regular file") {
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t.Fatalf("unexpected error: %v", err)
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}
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}
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