Document EWOULDBLOCK as a possible errno return value.
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@ -231,6 +231,13 @@ operation was interrupted by a signal.
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or
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.Dv O_EXLOCK
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is specified but the underlying filesystem does not support locking.
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.It Bq Er EWOULDBLOCK
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.Dv O_NONBLOCK
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and one of
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.Dv O_SHLOCK
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or
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.Dv O_EXLOCK
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is specified and the file is locked.
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.It Bq Er ENOSPC
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.Dv O_CREAT
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is specified,
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