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List:       busybox
Subject:    Re: httpd spins madly
From:       Laurent Bercot <ska-dietlibc () skarnet ! org>
Date:       2013-09-11 13:06:31
Message-ID: 52306AD7.6000507 () skarnet ! org
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> I take it from your bug report that having pfd[0].events zeroed
> doesn't prevent POLLHUP|POLLERR from being reported :(

  Hi Denys,
  POSIX says:

> If the value of fd is less than 0, events shall be ignored, andrevents shall be set \
> to 0 in that entry on return from poll(). In each pollfd structure, poll() shall \
> clear the revents member, except that where the application requested a report on a \
> condition by setting one of the bits of events listed above, poll() shall set the \
> corresponding bit in revents if the requested condition is true. In addition, \
> poll() shall set the POLLHUP, POLLERR, and POLLNVAL flag in revents if the \
> condition is true, even if the application did not set the corresponding bit in \
> events.

  If you want to ignore pfd[0] at some point, perform pfd[0] = -1.

-- 
  Laurent

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