[Boost-bugs] [Boost C++ Libraries] #10367: kqueue on OSX broke support for read-only file descriptors

Subject: [Boost-bugs] [Boost C++ Libraries] #10367: kqueue on OSX broke support for read-only file descriptors
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-08-17 23:57:16

#10367: kqueue on OSX broke support for read-only file descriptors
-----------------------------------+------------------------------
 Reporter:  alexander.afanasyev@…  |       Type:  Bugs
   Status:  new                    |  Milestone:  To Be Determined
Component:  None                   |    Version:  Boost 1.56.0
 Severity:  Problem                |   Keywords:
-----------------------------------+------------------------------
 Prior 1.56, we were successfully using
 `boost::asio::posix::stream_descriptor` with libpcap (file descriptor
 retrieved via `pcap_get_selectable_fd`).

 My understanding, that change
 https_github.com_boostorg_asio_commit_660e9fe30204e0ada0d1fd40c48015810d2647dc
 (replace _ with /) required all file-descriptors to be both readable and
 writeable (e.g., register_descriptor always registers EVFILT_READ and
 EVFILT_WRITE events).

 In the case of libpcap, the file descriptor only works in one direction
 (read) and attempt to register EVFILT_WRITE event results in `assign:
 Invalid argument` error.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10367>
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