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archive/tar: fix error message
Write should return ErrWriteAfterClose instead of ErrWriteTooLong when called after Close. Change-Id: If5ec4ef924e4c56489e0d426976f7e5fad79be9b Reviewed-on: https://go-review.googlesource.com/9259 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
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2 changed files with 18 additions and 1 deletions
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@ -355,7 +355,7 @@ func paxHeader(msg string) string {
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// hdr.Size bytes are written after WriteHeader.
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func (tw *Writer) Write(b []byte) (n int, err error) {
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if tw.closed {
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err = ErrWriteTooLong
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err = ErrWriteAfterClose
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return
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}
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overwrite := false
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@ -489,3 +489,20 @@ func TestValidTypeflagWithPAXHeader(t *testing.T) {
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}
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}
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}
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func TestWriteAfterClose(t *testing.T) {
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var buffer bytes.Buffer
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tw := NewWriter(&buffer)
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hdr := &Header{
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Name: "small.txt",
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Size: 5,
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}
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if err := tw.WriteHeader(hdr); err != nil {
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t.Fatalf("Failed to write header: %s", err)
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}
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tw.Close()
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if _, err := tw.Write([]byte("Kilts")); err != ErrWriteAfterClose {
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t.Fatalf("Write: got %v; want ErrWriteAfterClose", err)
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}
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}
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