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Noted that si_signo is unused on Linux.
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@ -225,6 +225,8 @@ siginfo_t {
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.IR si_signo ", " si_errno " and " si_code
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are defined for all signals.
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.RI ( si_signo
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is unused on Linux.)
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The rest of the struct may be a union, so that one should only
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read the fields that are meaningful for the given signal.
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POSIX.1b signals and
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