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tcp.7: Note indications for OOB data given by select(2) and poll(2)
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -220,6 +220,14 @@ flag is set for
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or
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or
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.BR recvmsg (2).
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.BR recvmsg (2).
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When out-of-band data is present,
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.BR select (2)
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indicates the file descriptor as having an exceptional condition and
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.I poll (2)
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indicates a
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.B POLLPRI
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event.
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Linux 2.4 introduced a number of changes for improved
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Linux 2.4 introduced a number of changes for improved
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throughput and scaling, as well as enhanced functionality.
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throughput and scaling, as well as enhanced functionality.
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Some of these features include support for zero-copy
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Some of these features include support for zero-copy
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