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sigaction.2: Refer the reader to fcntl(2) F_SETSIG for further details on si_fd
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -468,7 +468,11 @@ field by
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.BR poll (2).
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The
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.I si_fd
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field indicates the file descriptor for which the I/O event occurred.
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field indicates the file descriptor for which the I/O event occurred;
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for further details, see the description of
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.BR F_SETSIG
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in
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.BR fcntl (2).
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.IP *
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.BR SIGSYS ,
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generated (since Linux 3.5)
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