fileutil: return immediately if preallocating 0 bytes
fallocate will return EINVAL, causing zeroing to the end of a 0 byte file to fail. Fixes #8045release-3.3
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4c5f9e0910
commit
87a3c87e45
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@ -127,6 +127,11 @@ func TestZeroToEnd(t *testing.T) {
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}
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defer f.Close()
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// Ensure 0 size is a nop so zero-to-end on an empty file won't give EINVAL.
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if err = ZeroToEnd(f); err != nil {
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t.Fatal(err)
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}
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b := make([]byte, 1024)
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for i := range b {
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b[i] = 12
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@ -25,6 +25,10 @@ import (
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// If the operation is unsupported, no error will be returned.
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// Otherwise, the error encountered will be returned.
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func Preallocate(f *os.File, sizeInBytes int64, extendFile bool) error {
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if sizeInBytes == 0 {
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// fallocate will return EINVAL if length is 0; skip
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return nil
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}
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if extendFile {
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return preallocExtend(f, sizeInBytes)
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}
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