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signalfd.2: Describe semantics with respect to SCM_RIGHTS
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -226,6 +226,15 @@ A
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.BR read (2)
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.BR read (2)
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from the file descriptor in the child will return information
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from the file descriptor in the child will return information
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about signals queued to the child.
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about signals queued to the child.
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.SS Semantics of file descriptor passing
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As with other file descriptors,
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signalfd file descriptors can be passed to another process
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via a UNIX domain socket (see
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.BR unix (7)).
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In the receiving process, a
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.BR read (2)
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from the received file descriptor will return information
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about signals queued to that process.
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.SS execve(2) semantics
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.SS execve(2) semantics
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Just like any other file descriptor,
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Just like any other file descriptor,
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a signalfd file descriptor remains open across an
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a signalfd file descriptor remains open across an
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